HH/apps/complaints/ui_views.py

"""
Complaints UI views - Server-rendered templates for complaints console
"""

from django.contrib import messages
from django.contrib.auth.decorators import login_required
from django.core.paginator import Paginator
from django.db.models import Q, Count, Prefetch
from django.http import JsonResponse
from django.shortcuts import get_object_or_404, redirect, render
from django.utils import timezone
from django.views.decorators.http import require_http_methods

from apps.accounts.models import User
from apps.core.services import AuditService
from apps.organizations.models import Department, Hospital, Staff
from apps.px_sources.models import SourceUser, PXSource

from .models import (
    Complaint,
    ComplaintAttachment,
    ComplaintCategory,
    ComplaintStatus,
    ComplaintUpdate,
    ComplaintExplanation,
    Inquiry,
    InquiryAttachment,
    InquiryUpdate,
)


@login_required
def complaint_list(request):
    """
    Complaints list view with advanced filters and pagination.

    Features:
    - Server-side pagination
    - Advanced filters (status, severity, priority, hospital, department, etc.)
    - Search by title, description, patient MRN
    - Bulk actions support
    - Export capability
    """
    # Base queryset with optimizations
    queryset = Complaint.objects.select_related(
        "patient", "hospital", "department", "staff", "assigned_to", "resolved_by", "closed_by"
    )

    # Apply RBAC filters
    user = request.user
    if user.is_px_admin():
        pass  # See all
    elif user.is_hospital_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    elif user.is_department_manager() and user.department:
        queryset = queryset.filter(department=user.department)
    elif user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    else:
        queryset = queryset.none()

    # Apply filters from request
    status_filter = request.GET.get("status")
    if status_filter:
        queryset = queryset.filter(status=status_filter)

    severity_filter = request.GET.get("severity")
    if severity_filter:
        queryset = queryset.filter(severity=severity_filter)

    priority_filter = request.GET.get("priority")
    if priority_filter:
        queryset = queryset.filter(priority=priority_filter)

    category_filter = request.GET.get("category")
    if category_filter:
        queryset = queryset.filter(category=category_filter)

    source_filter = request.GET.get("source")
    if source_filter:
        queryset = queryset.filter(source=source_filter)

    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    department_filter = request.GET.get("department")
    if department_filter:
        queryset = queryset.filter(department_id=department_filter)

    staff_filter = request.GET.get("staff")
    if staff_filter:
        queryset = queryset.filter(staff_id=staff_filter)

    assigned_to_filter = request.GET.get("assigned_to")
    if assigned_to_filter:
        queryset = queryset.filter(assigned_to_id=assigned_to_filter)

    overdue_filter = request.GET.get("is_overdue")
    if overdue_filter == "true":
        queryset = queryset.filter(is_overdue=True)

    # Search
    search_query = request.GET.get("search")
    if search_query:
        queryset = queryset.filter(
            Q(title__icontains=search_query)
            | Q(description__icontains=search_query)
            | Q(patient__mrn__icontains=search_query)
            | Q(patient__first_name__icontains=search_query)
            | Q(patient__last_name__icontains=search_query)
        )

    # Date range filters
    date_from = request.GET.get("date_from")
    if date_from:
        queryset = queryset.filter(created_at__gte=date_from)

    date_to = request.GET.get("date_to")
    if date_to:
        queryset = queryset.filter(created_at__lte=date_to)

    # Ordering
    order_by = request.GET.get("order_by", "-created_at")
    queryset = queryset.order_by(order_by)

    # Pagination
    page_size = int(request.GET.get("page_size", 25))
    paginator = Paginator(queryset, page_size)
    page_number = request.GET.get("page", 1)
    page_obj = paginator.get_page(page_number)

    # Get filter options
    hospitals = Hospital.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        hospitals = hospitals.filter(id=user.hospital.id)

    departments = Department.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        departments = departments.filter(hospital=user.hospital)

    # Get assignable users
    assignable_users = User.objects.filter(is_active=True)
    if user.hospital:
        assignable_users = assignable_users.filter(hospital=user.hospital)

    # Statistics
    stats = {
        "total": queryset.count(),
        "open": queryset.filter(status=ComplaintStatus.OPEN).count(),
        "in_progress": queryset.filter(status=ComplaintStatus.IN_PROGRESS).count(),
        "overdue": queryset.filter(is_overdue=True).count(),
    }

    context = {
        "page_obj": page_obj,
        "complaints": page_obj.object_list,
        "stats": stats,
        "hospitals": hospitals,
        "departments": departments,
        "assignable_users": assignable_users,
        "status_choices": ComplaintStatus.choices,
        "filters": request.GET,
    }

    return render(request, "complaints/complaint_list.html", context)


@login_required
def complaint_detail(request, pk):
    """
    Complaint detail view with timeline, attachments, and actions.

    Features:
    - Full complaint details
    - Timeline of all updates
    - Attachments management
    - Related surveys and journey
    - Linked PX actions
    - Workflow actions (assign, status change, add note)
    """
    from apps.px_sources.models import SourceUser
    source_user = SourceUser.objects.filter(user=request.user).first()
    base_layout = 'layouts/source_user_base.html' if source_user else 'layouts/base.html'
    
    complaint = get_object_or_404(
        Complaint.objects.select_related(
            "patient", "hospital", "department", "staff", "assigned_to", "resolved_by", "closed_by", "resolution_survey"
        ).prefetch_related("attachments", "updates__created_by"),
        pk=pk,
    )

    # Check access
    user = request.user
    if not user.is_px_admin():
        if user.is_hospital_admin() and complaint.hospital != user.hospital:
            messages.error(request, "You don't have permission to view this complaint.")
            return redirect("complaints:complaint_list")
        elif user.is_department_manager() and complaint.department != user.department:
            messages.error(request, "You don't have permission to view this complaint.")
            return redirect("complaints:complaint_list")
        elif user.hospital and complaint.hospital != user.hospital:
            messages.error(request, "You don't have permission to view this complaint.")
            return redirect("complaints:complaint_list")

    # Get timeline (updates)
    timeline = complaint.updates.all().order_by("-created_at")

    # Get attachments
    attachments = complaint.attachments.all().order_by("-created_at")

    # Get related PX actions (using ContentType since PXAction uses GenericForeignKey)
    from django.contrib.contenttypes.models import ContentType
    from apps.px_action_center.models import PXAction

    complaint_ct = ContentType.objects.get_for_model(Complaint)
    px_actions = PXAction.objects.filter(content_type=complaint_ct, object_id=complaint.id).order_by("-created_at")

    # Get assignable users
    assignable_users = User.objects.filter(is_active=True)
    if complaint.hospital:
        assignable_users = assignable_users.filter(hospital=complaint.hospital)

    # Get departments for the complaint's hospital
    hospital_departments = []
    if complaint.hospital:
        hospital_departments = Department.objects.filter(hospital=complaint.hospital, status="active").order_by("name")

    # Check if overdue
    complaint.check_overdue()

    # Get explanations for this complaint
    from .models import ComplaintExplanation

    explanations = complaint.explanations.all().select_related("staff").order_by("-created_at")
    explanation = explanations.first() if explanations else None

    # Get explanation attachments if explanation exists
    explanation_attachments = []
    if explanation:
        explanation_attachments = explanation.attachments.all()

    context = {
        "complaint": complaint,
        "timeline": timeline,
        "attachments": attachments,
        "px_actions": px_actions,
        "assignable_users": assignable_users,
        "status_choices": ComplaintStatus.choices,
        "can_edit": user.is_px_admin() or user.is_hospital_admin(),
        "hospital_departments": hospital_departments,
        'base_layout': base_layout,
        'source_user': source_user,
        "explanation": explanation,
        "explanations": explanations,
        "explanation_attachments": explanation_attachments,
    }

    return render(request, "complaints/complaint_detail.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def complaint_create(request):
    """Create new complaint with AI-powered classification"""
    from apps.complaints.forms import ComplaintForm
    
    # Determine base layout based on user type
    from apps.px_sources.models import SourceUser
    source_user = SourceUser.objects.filter(user=request.user).first()
    base_layout = 'layouts/source_user_base.html' if source_user else 'layouts/base.html'
    
    if request.method == 'POST':
        # Handle form submission
        form = ComplaintForm(request.POST, user=request.user)
        
        if not form.is_valid():
            # Debug: print form errors
            print("Form validation errors:", form.errors)
            messages.error(request, f"Please correct the errors: {form.errors}")
            context = {
                'form': form,
                'base_layout': base_layout,
                'source_user': source_user,
            }
            return render(request, 'complaints/complaint_form.html', context)
        
        try:
            # Create complaint with AI defaults
            complaint = form.save(commit=False)
            
            # Set AI-determined defaults
            complaint.title = 'Complaint'  # AI will generate title
            # category can be None, AI will determine it
            complaint.subcategory = ''  # AI will determine
            
            # Set source from logged-in source user
            if source_user and source_user.source:
                complaint.source = source_user.source
            else:
                # Fallback: get or create a 'staff' source
                from apps.px_sources.models import PXSource
                try:
                    source_obj = PXSource.objects.get(code='staff')
                except PXSource.DoesNotExist:
                    source_obj = PXSource.objects.create(
                        code='staff',
                        name='Staff',
                        description='Complaints submitted by staff members'
                    )
                complaint.source = source_obj
            
            complaint.priority = 'medium'  # AI will update
            complaint.severity = 'medium'  # AI will update
            complaint.created_by = request.user
            
            complaint.save()

            # Create initial update
            ComplaintUpdate.objects.create(
                complaint=complaint,
                update_type="note",
                message="Complaint created. AI analysis running in background.",
                created_by=request.user,
            )

            # Trigger AI analysis in background using Celery
            from apps.complaints.tasks import analyze_complaint_with_ai

            analyze_complaint_with_ai.delay(str(complaint.id))

            # Log audit
            AuditService.log_event(
                event_type="complaint_created",
                description=f"Complaint created: {complaint.title}",
                user=request.user,
                content_object=complaint,
                metadata={
                    # "category": category.name_en,
                    "severity": complaint.severity,
                    "patient_mrn": complaint.patient.mrn,
                    "ai_analysis_pending": True,
                },
            )

            messages.success(
                request,
                f"Complaint #{complaint.id} created successfully. AI is analyzing and classifying the complaint.",
            )
            return redirect("complaints:complaint_detail", pk=complaint.id)

        except ComplaintCategory.DoesNotExist:
            messages.error(request, "Selected category not found.")
            return redirect("complaints:complaint_create")
        except Exception as e:
            messages.error(request, f"Error creating complaint: {str(e)}")
            return redirect("complaints:complaint_create")

    # GET request - show form
    # Check for hospital parameter from URL (for pre-selection)
    initial_data = {}
    hospital_id = request.GET.get('hospital')
    if hospital_id:
        initial_data['hospital'] = hospital_id
    
    form = ComplaintForm(user=request.user, initial=initial_data)

    context = {
        'form': form,
        'base_layout': base_layout,
        'source_user': source_user,
    }

    return render(request, "complaints/complaint_form.html", context)


@login_required
@require_http_methods(["POST"])
def complaint_assign(request, pk):
    """Assign complaint to user"""
    complaint = get_object_or_404(Complaint, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to assign complaints.")
        return redirect("complaints:complaint_detail", pk=pk)

    user_id = request.POST.get("user_id")
    if not user_id:
        messages.error(request, "Please select a user to assign.")
        return redirect("complaints:complaint_detail", pk=pk)

    try:
        assignee = User.objects.get(id=user_id)
        complaint.assigned_to = assignee
        complaint.assigned_at = timezone.now()
        complaint.save(update_fields=["assigned_to", "assigned_at"])

        # Create update
        ComplaintUpdate.objects.create(
            complaint=complaint,
            update_type="assignment",
            message=f"Assigned to {assignee.get_full_name()}",
            created_by=request.user,
        )

        # Log audit
        AuditService.log_event(
            event_type="assignment",
            description=f"Complaint assigned to {assignee.get_full_name()}",
            user=request.user,
            content_object=complaint,
        )

        messages.success(request, f"Complaint assigned to {assignee.get_full_name()}.")

    except User.DoesNotExist:
        messages.error(request, "User not found.")

    return redirect("complaints:complaint_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def complaint_change_status(request, pk):
    """Change complaint status"""
    complaint = get_object_or_404(Complaint, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to change complaint status.")
        return redirect("complaints:complaint_detail", pk=pk)

    new_status = request.POST.get("status")
    note = request.POST.get("note", "")

    if not new_status:
        messages.error(request, "Please select a status.")
        return redirect("complaints:complaint_detail", pk=pk)

    old_status = complaint.status
    complaint.status = new_status

    # Handle status-specific logic
    if new_status == ComplaintStatus.RESOLVED:
        complaint.resolved_at = timezone.now()
        complaint.resolved_by = request.user
    elif new_status == ComplaintStatus.CLOSED:
        complaint.closed_at = timezone.now()
        complaint.closed_by = request.user

        # Trigger resolution satisfaction survey
        from apps.complaints.tasks import send_complaint_resolution_survey

        send_complaint_resolution_survey.delay(str(complaint.id))

    complaint.save()

    # Create update
    ComplaintUpdate.objects.create(
        complaint=complaint,
        update_type="status_change",
        message=note or f"Status changed from {old_status} to {new_status}",
        created_by=request.user,
        old_status=old_status,
        new_status=new_status,
    )

    # Log audit
    AuditService.log_event(
        event_type="status_change",
        description=f"Complaint status changed from {old_status} to {new_status}",
        user=request.user,
        content_object=complaint,
        metadata={"old_status": old_status, "new_status": new_status},
    )

    messages.success(request, f"Complaint status changed to {new_status}.")
    return redirect("complaints:complaint_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def complaint_add_note(request, pk):
    """Add note to complaint"""
    complaint = get_object_or_404(Complaint, pk=pk)

    note = request.POST.get("note")
    if not note:
        messages.error(request, "Please enter a note.")
        return redirect("complaints:complaint_detail", pk=pk)

    # Create update
    ComplaintUpdate.objects.create(complaint=complaint, update_type="note", message=note, created_by=request.user)

    messages.success(request, "Note added successfully.")
    return redirect("complaints:complaint_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def complaint_change_department(request, pk):
    """Change complaint department"""
    complaint = get_object_or_404(Complaint, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to change complaint department.")
        return redirect("complaints:complaint_detail", pk=pk)

    department_id = request.POST.get("department_id")
    if not department_id:
        messages.error(request, "Please select a department.")
        return redirect("complaints:complaint_detail", pk=pk)

    try:
        department = Department.objects.get(id=department_id)

        # Check department belongs to same hospital
        if department.hospital != complaint.hospital:
            messages.error(request, "Department does not belong to this complaint's hospital.")
            return redirect("complaints:complaint_detail", pk=pk)

        old_department = complaint.department
        complaint.department = department
        complaint.save(update_fields=["department"])

        # Create update
        ComplaintUpdate.objects.create(
            complaint=complaint,
            update_type="assignment",
            message=f"Department changed to {department.name}",
            created_by=request.user,
            metadata={
                "old_department_id": str(old_department.id) if old_department else None,
                "new_department_id": str(department.id),
            },
        )

        # Log audit
        AuditService.log_event(
            event_type="department_change",
            description=f"Complaint department changed to {department.name}",
            user=request.user,
            content_object=complaint,
            metadata={
                "old_department_id": str(old_department.id) if old_department else None,
                "new_department_id": str(department.id),
            },
        )

        messages.success(request, f"Department changed to {department.name}.")

    except Department.DoesNotExist:
        messages.error(request, "Department not found.")

    return redirect("complaints:complaint_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def complaint_escalate(request, pk):
    """Escalate complaint"""
    complaint = get_object_or_404(Complaint, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to escalate complaints.")
        return redirect("complaints:complaint_detail", pk=pk)

    reason = request.POST.get("reason", "")

    # Mark as escalated
    complaint.escalated_at = timezone.now()
    complaint.save(update_fields=["escalated_at"])

    # Create update
    ComplaintUpdate.objects.create(
        complaint=complaint,
        update_type="escalation",
        message=f"Complaint escalated. Reason: {reason}",
        created_by=request.user,
    )

    # Log audit
    AuditService.log_event(
        event_type="escalation",
        description="Complaint escalated",
        user=request.user,
        content_object=complaint,
        metadata={"reason": reason},
    )

    messages.success(request, "Complaint escalated successfully.")
    return redirect("complaints:complaint_detail", pk=pk)


@login_required
def complaint_export_csv(request):
    """Export complaints to CSV"""
    from apps.complaints.utils import export_complaints_csv

    # Get filtered queryset (reuse list view logic)
    queryset = Complaint.objects.select_related(
        "patient", "hospital", "department", "staff", "assigned_to", "resolved_by", "closed_by"
    )

    # Apply RBAC filters
    user = request.user
    if user.is_px_admin():
        pass
    elif user.is_hospital_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    elif user.is_department_manager() and user.department:
        queryset = queryset.filter(department=user.department)
    elif user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    else:
        queryset = queryset.none()

    # Apply filters from request
    status_filter = request.GET.get("status")
    if status_filter:
        queryset = queryset.filter(status=status_filter)

    severity_filter = request.GET.get("severity")
    if severity_filter:
        queryset = queryset.filter(severity=severity_filter)

    priority_filter = request.GET.get("priority")
    if priority_filter:
        queryset = queryset.filter(priority=priority_filter)

    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    department_filter = request.GET.get("department")
    if department_filter:
        queryset = queryset.filter(department_id=department_filter)

    overdue_filter = request.GET.get("is_overdue")
    if overdue_filter == "true":
        queryset = queryset.filter(is_overdue=True)

    search_query = request.GET.get("search")
    if search_query:
        queryset = queryset.filter(
            Q(title__icontains=search_query)
            | Q(description__icontains=search_query)
            | Q(patient__mrn__icontains=search_query)
        )

    return export_complaints_csv(queryset, request.GET.dict())


@login_required
def complaint_export_excel(request):
    """Export complaints to Excel"""
    from apps.complaints.utils import export_complaints_excel

    # Get filtered queryset (same as CSV)
    queryset = Complaint.objects.select_related(
        "patient", "hospital", "department", "staff", "assigned_to", "resolved_by", "closed_by"
    )

    # Apply RBAC filters
    user = request.user
    if user.is_px_admin():
        pass
    elif user.is_hospital_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    elif user.is_department_manager() and user.department:
        queryset = queryset.filter(department=user.department)
    elif user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    else:
        queryset = queryset.none()

    # Apply filters from request
    status_filter = request.GET.get("status")
    if status_filter:
        queryset = queryset.filter(status=status_filter)

    severity_filter = request.GET.get("severity")
    if severity_filter:
        queryset = queryset.filter(severity=severity_filter)

    priority_filter = request.GET.get("priority")
    if priority_filter:
        queryset = queryset.filter(priority=priority_filter)

    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    department_filter = request.GET.get("department")
    if department_filter:
        queryset = queryset.filter(department_id=department_filter)

    overdue_filter = request.GET.get("is_overdue")
    if overdue_filter == "true":
        queryset = queryset.filter(is_overdue=True)

    search_query = request.GET.get("search")
    if search_query:
        queryset = queryset.filter(
            Q(title__icontains=search_query)
            | Q(description__icontains=search_query)
            | Q(patient__mrn__icontains=search_query)
        )

    return export_complaints_excel(queryset, request.GET.dict())


@login_required
@require_http_methods(["POST"])
def complaint_bulk_assign(request):
    """Bulk assign complaints"""
    from apps.complaints.utils import bulk_assign_complaints
    import json

    # Check permission
    if not (request.user.is_px_admin() or request.user.is_hospital_admin()):
        return JsonResponse({"success": False, "error": "Permission denied"}, status=403)

    try:
        data = json.loads(request.body)
        complaint_ids = data.get("complaint_ids", [])
        user_id = data.get("user_id")

        if not complaint_ids or not user_id:
            return JsonResponse({"success": False, "error": "Missing required fields"}, status=400)

        result = bulk_assign_complaints(complaint_ids, user_id, request.user)

        if result["success"]:
            messages.success(request, f"Successfully assigned {result['success_count']} complaints.")

        return JsonResponse(result)

    except json.JSONDecodeError:
        return JsonResponse({"success": False, "error": "Invalid JSON"}, status=400)
    except Exception as e:
        return JsonResponse({"success": False, "error": str(e)}, status=500)


@login_required
@require_http_methods(["POST"])
def complaint_bulk_status(request):
    """Bulk change complaint status"""
    from apps.complaints.utils import bulk_change_status
    import json

    # Check permission
    if not (request.user.is_px_admin() or request.user.is_hospital_admin()):
        return JsonResponse({"success": False, "error": "Permission denied"}, status=403)

    try:
        data = json.loads(request.body)
        complaint_ids = data.get("complaint_ids", [])
        new_status = data.get("status")
        note = data.get("note", "")

        if not complaint_ids or not new_status:
            return JsonResponse({"success": False, "error": "Missing required fields"}, status=400)

        result = bulk_change_status(complaint_ids, new_status, request.user, note)

        if result["success"]:
            messages.success(request, f"Successfully updated {result['success_count']} complaints.")

        return JsonResponse(result)

    except json.JSONDecodeError:
        return JsonResponse({"success": False, "error": "Invalid JSON"}, status=400)
    except Exception as e:
        return JsonResponse({"success": False, "error": str(e)}, status=500)


@login_required
@require_http_methods(["POST"])
def complaint_bulk_escalate(request):
    """Bulk escalate complaints"""
    from apps.complaints.utils import bulk_escalate_complaints
    import json

    # Check permission
    if not (request.user.is_px_admin() or request.user.is_hospital_admin()):
        return JsonResponse({"success": False, "error": "Permission denied"}, status=403)

    try:
        data = json.loads(request.body)
        complaint_ids = data.get("complaint_ids", [])
        reason = data.get("reason", "")

        if not complaint_ids:
            return JsonResponse({"success": False, "error": "No complaints selected"}, status=400)

        result = bulk_escalate_complaints(complaint_ids, request.user, reason)

        if result["success"]:
            messages.success(request, f"Successfully escalated {result['success_count']} complaints.")

        return JsonResponse(result)

    except json.JSONDecodeError:
        return JsonResponse({"success": False, "error": "Invalid JSON"}, status=400)
    except Exception as e:
        return JsonResponse({"success": False, "error": str(e)}, status=500)


# ============================================================================
# INQUIRIES VIEWS
# ============================================================================


@login_required
def inquiry_list(request):
    """
    Inquiries list view with filters and pagination.
    """
    from .models import Inquiry

    # Base queryset with optimizations
    queryset = Inquiry.objects.select_related("patient", "hospital", "department", "assigned_to", "responded_by")

    # Apply RBAC filters
    user = request.user
    if user.is_px_admin():
        pass  # See all
    elif user.is_hospital_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    elif user.is_department_manager() and user.department:
        queryset = queryset.filter(department=user.department)
    elif user.hospital:
        queryset = queryset.filter(hospital=user.hospital)
    else:
        queryset = queryset.none()

    # Apply filters
    status_filter = request.GET.get("status")
    if status_filter:
        queryset = queryset.filter(status=status_filter)

    category_filter = request.GET.get("category")
    if category_filter:
        queryset = queryset.filter(category=category_filter)

    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    department_filter = request.GET.get("department")
    if department_filter:
        queryset = queryset.filter(department_id=department_filter)

    # Search
    search_query = request.GET.get("search")
    if search_query:
        queryset = queryset.filter(
            Q(subject__icontains=search_query)
            | Q(message__icontains=search_query)
            | Q(contact_name__icontains=search_query)
            | Q(contact_email__icontains=search_query)
        )

    # Ordering
    order_by = request.GET.get("order_by", "-created_at")
    queryset = queryset.order_by(order_by)

    # Pagination
    page_size = int(request.GET.get("page_size", 25))
    paginator = Paginator(queryset, page_size)
    page_number = request.GET.get("page", 1)
    page_obj = paginator.get_page(page_number)

    # Get filter options
    hospitals = Hospital.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        hospitals = hospitals.filter(id=user.hospital.id)

    departments = Department.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        departments = departments.filter(hospital=user.hospital)

    # Statistics
    stats = {
        "total": queryset.count(),
        "open": queryset.filter(status="open").count(),
        "in_progress": queryset.filter(status="in_progress").count(),
        "resolved": queryset.filter(status="resolved").count(),
    }

    context = {
        "page_obj": page_obj,
        "inquiries": page_obj.object_list,
        "stats": stats,
        "hospitals": hospitals,
        "departments": departments,
        "filters": request.GET,
    }

    return render(request, "complaints/inquiry_list.html", context)


@login_required
def inquiry_detail(request, pk):
    """
    Inquiry detail view with timeline and attachments.

    Features:
    - Full inquiry details
    - Timeline of all updates
    - Attachments management
    - Workflow actions (assign, status change, add note, respond)
    """
    from apps.px_sources.models import SourceUser
    source_user = SourceUser.objects.filter(user=request.user).first()
    base_layout = 'layouts/source_user_base.html' if source_user else 'layouts/base.html'
    
    inquiry = get_object_or_404(
        Inquiry.objects.select_related(
            "patient", "hospital", "department", "assigned_to", "responded_by"
        ).prefetch_related("attachments", "updates__created_by"),
        pk=pk,
    )

    # Check access
    user = request.user
    if not user.is_px_admin():
        if user.is_hospital_admin() and inquiry.hospital != user.hospital:
            messages.error(request, "You don't have permission to view this inquiry.")
            return redirect("complaints:inquiry_list")
        elif user.hospital and inquiry.hospital != user.hospital:
            messages.error(request, "You don't have permission to view this inquiry.")
            return redirect("complaints:inquiry_list")

    # Get timeline (updates)
    timeline = inquiry.updates.all().order_by("-created_at")

    # Get attachments
    attachments = inquiry.attachments.all().order_by("-created_at")

    # Get assignable users
    assignable_users = User.objects.filter(is_active=True)
    if inquiry.hospital:
        assignable_users = assignable_users.filter(hospital=inquiry.hospital)

    # Status choices for the form
    status_choices = [
        ("open", "Open"),
        ("in_progress", "In Progress"),
        ("resolved", "Resolved"),
        ("closed", "Closed"),
    ]

    context = {
        "inquiry": inquiry,
        "timeline": timeline,
        "attachments": attachments,
        "assignable_users": assignable_users,
        "status_choices": status_choices,
        "can_edit": user.is_px_admin() or user.is_hospital_admin(),
        'base_layout': base_layout,
        'source_user': source_user,
    }

    return render(request, "complaints/inquiry_detail.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def inquiry_create(request):
    """Create new inquiry"""
    from .models import Inquiry
    from .forms import InquiryForm
    from apps.organizations.models import Patient
    from apps.px_sources.models import SourceUser, PXSource
    
    # Determine base layout based on user type
    source_user = SourceUser.objects.filter(user=request.user).first()
    base_layout = 'layouts/source_user_base.html' if source_user else 'layouts/base.html'
    
    if request.method == 'POST':
        # Handle form submission
        form = InquiryForm(request.POST, user=request.user)
        
        if not form.is_valid():
            messages.error(request, f"Please correct the errors: {form.errors}")
            context = {
                'form': form,
                'base_layout': base_layout,
                'source_user': source_user,
            }
            return render(request, 'complaints/inquiry_form.html', context)
        
        try:
            # Save inquiry
            inquiry = form.save(commit=False)
            
            # Set source for source users
            source_user = SourceUser.objects.filter(user=request.user).first()
            if source_user:
                inquiry.source = source_user.source
                inquiry.created_by = request.user
            
            inquiry.save()

            # Log audit
            AuditService.log_event(
                event_type="inquiry_created",
                description=f"Inquiry created: {inquiry.subject}",
                user=request.user,
                content_object=inquiry,
                metadata={"category": inquiry.category},
            )

            messages.success(request, f"Inquiry #{inquiry.id} created successfully.")
            return redirect("complaints:inquiry_detail", pk=inquiry.id)

        except Exception as e:
            messages.error(request, f"Error creating inquiry: {str(e)}")
            return redirect("complaints:inquiry_create")

    # GET request - show form
    form = InquiryForm(user=request.user)
    hospitals = Hospital.objects.filter(status='active')
    if not request.user.is_px_admin() and request.user.hospital:
        hospitals = hospitals.filter(id=request.user.hospital.id)

    context = {
        'form': form,
        'base_layout': base_layout,
        'source_user': source_user,
    }

    return render(request, "complaints/inquiry_form.html", context)


@login_required
@require_http_methods(["POST"])
def inquiry_assign(request, pk):
    """Assign inquiry to user"""
    from .models import Inquiry

    inquiry = get_object_or_404(Inquiry, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to assign inquiries.")
        return redirect("complaints:inquiry_detail", pk=pk)

    user_id = request.POST.get("user_id")
    if not user_id:
        messages.error(request, "Please select a user to assign.")
        return redirect("complaints:inquiry_detail", pk=pk)

    try:
        assignee = User.objects.get(id=user_id)
        inquiry.assigned_to = assignee
        inquiry.save(update_fields=["assigned_to"])

        # Create update
        InquiryUpdate.objects.create(
            inquiry=inquiry,
            update_type="assignment",
            message=f"Assigned to {assignee.get_full_name()}",
            created_by=request.user,
        )

        # Log audit
        AuditService.log_event(
            event_type="assignment",
            description=f"Inquiry assigned to {assignee.get_full_name()}",
            user=request.user,
            content_object=inquiry,
        )

        messages.success(request, f"Inquiry assigned to {assignee.get_full_name()}.")

    except User.DoesNotExist:
        messages.error(request, "User not found.")

    return redirect("complaints:inquiry_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def inquiry_change_status(request, pk):
    """Change inquiry status"""
    from .models import Inquiry

    inquiry = get_object_or_404(Inquiry, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to change inquiry status.")
        return redirect("complaints:inquiry_detail", pk=pk)

    new_status = request.POST.get("status")
    note = request.POST.get("note", "")

    if not new_status:
        messages.error(request, "Please select a status.")
        return redirect("complaints:inquiry_detail", pk=pk)

    old_status = inquiry.status
    inquiry.status = new_status

    # Handle status-specific logic
    if new_status == "resolved" and not inquiry.response:
        messages.error(request, "Please add a response before resolving.")
        return redirect("complaints:inquiry_detail", pk=pk)

    inquiry.save()

    # Create update
    InquiryUpdate.objects.create(
        inquiry=inquiry,
        update_type="status_change",
        message=note or f"Status changed from {old_status} to {new_status}",
        created_by=request.user,
        old_status=old_status,
        new_status=new_status,
    )

    # Log audit
    AuditService.log_event(
        event_type="status_change",
        description=f"Inquiry status changed from {old_status} to {new_status}",
        user=request.user,
        content_object=inquiry,
        metadata={"old_status": old_status, "new_status": new_status},
    )

    messages.success(request, f"Inquiry status changed to {new_status}.")
    return redirect("complaints:inquiry_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def inquiry_add_note(request, pk):
    """Add note to inquiry"""
    from .models import Inquiry

    inquiry = get_object_or_404(Inquiry, pk=pk)

    note = request.POST.get("note")
    if not note:
        messages.error(request, "Please enter a note.")
        return redirect("complaints:inquiry_detail", pk=pk)

    # Create update
    InquiryUpdate.objects.create(inquiry=inquiry, update_type="note", message=note, created_by=request.user)

    messages.success(request, "Note added successfully.")
    return redirect("complaints:inquiry_detail", pk=pk)


@login_required
@require_http_methods(["POST"])
def inquiry_respond(request, pk):
    """Respond to inquiry"""
    from .models import Inquiry

    inquiry = get_object_or_404(Inquiry, pk=pk)

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to respond to inquiries.")
        return redirect("complaints:inquiry_detail", pk=pk)

    response = request.POST.get("response")
    if not response:
        messages.error(request, "Please enter a response.")
        return redirect("complaints:inquiry_detail", pk=pk)

    inquiry.response = response
    inquiry.responded_at = timezone.now()
    inquiry.responded_by = request.user
    inquiry.status = "resolved"
    inquiry.save()

    # Create update
    InquiryUpdate.objects.create(
        inquiry=inquiry, update_type="response", message="Response sent", created_by=request.user
    )

    # Log audit
    AuditService.log_event(
        event_type="inquiry_responded",
        description=f"Inquiry responded to: {inquiry.subject}",
        user=request.user,
        content_object=inquiry,
    )

    messages.success(request, "Response sent successfully.")
    return redirect("complaints:inquiry_detail", pk=pk)


# ============================================================================
# ANALYTICS VIEWS
# ============================================================================


@login_required
def complaints_analytics(request):
    """
    Complaints analytics dashboard.
    """
    from .analytics import ComplaintAnalytics

    user = request.user
    hospital = None

    # Apply RBAC
    if not user.is_px_admin() and user.hospital:
        hospital = user.hospital

    # Get date range from request
    date_range = int(request.GET.get("date_range", 30))

    # Get analytics data
    dashboard_summary = ComplaintAnalytics.get_dashboard_summary(hospital)
    trends = ComplaintAnalytics.get_complaint_trends(hospital, date_range)
    sla_compliance = ComplaintAnalytics.get_sla_compliance(hospital, date_range)
    resolution_rate = ComplaintAnalytics.get_resolution_rate(hospital, date_range)
    top_categories = ComplaintAnalytics.get_top_categories(hospital, date_range)
    overdue_complaints = ComplaintAnalytics.get_overdue_complaints(hospital)

    context = {
        "dashboard_summary": dashboard_summary,
        "trends": trends,
        "sla_compliance": sla_compliance,
        "resolution_rate": resolution_rate,
        "top_categories": top_categories,
        "overdue_complaints": overdue_complaints,
        "date_range": date_range,
    }

    return render(request, "complaints/analytics.html", context)


# ============================================================================
# PUBLIC COMPLAINT FORM (No Authentication Required)
# ============================================================================


def public_complaint_submit(request):
    """
    Public complaint submission form (accessible without login).
    Handles both GET (show form) and POST (submit complaint).

    Key changes for AI-powered classification:
    - Simplified form with only 5 required fields: name, email, phone, hospital, description
    - AI generates: title, category, subcategory, department, severity, priority
    - Patient lookup removed - contact info stored directly
    """
    if request.method == "POST":
        try:
            # Get form data from simplified form
            name = request.POST.get("name")
            email = request.POST.get("email")
            phone = request.POST.get("phone")
            hospital_id = request.POST.get("hospital")
            category_id = request.POST.get("category")
            subcategory_id = request.POST.get("subcategory")
            description = request.POST.get("description")

            # Validate required fields
            errors = []
            if not name:
                errors.append("Name is required")
            if not email:
                errors.append("Email is required")
            if not phone:
                errors.append("Phone is required")
            if not hospital_id:
                errors.append("Hospital is required")
            if not category_id:
                errors.append("Category is required")
            if not description:
                errors.append("Description is required")

            if errors:
                if request.headers.get("x-requested-with") == "XMLHttpRequest":
                    return JsonResponse({"success": False, "errors": errors}, status=400)
                else:
                    messages.error(request, "Please fill in all required fields.")
                    return render(
                        request,
                        "complaints/public_complaint_form.html",
                        {
                            "hospitals": Hospital.objects.filter(status="active").order_by("name"),
                        },
                    )

            # Get hospital
            hospital = Hospital.objects.get(id=hospital_id)

            # Get category and subcategory
            from .models import ComplaintCategory

            category = ComplaintCategory.objects.get(id=category_id)
            subcategory = None
            if subcategory_id:
                subcategory = ComplaintCategory.objects.get(id=subcategory_id)

            # Generate unique reference number: CMP-YYYYMMDD-XXXXX
            import uuid
            from datetime import datetime

            today = datetime.now().strftime("%Y%m%d")
            random_suffix = str(uuid.uuid4().int)[:6]
            reference_number = f"CMP-{today}-{random_suffix}"

            # Create complaint with user-selected category/subcategory
            complaint = Complaint.objects.create(
                patient=None,  # No patient record for public submissions
                hospital=hospital,
                department=None,  # AI will determine this
                title="Complaint",  # AI will generate title
                description=description,
                category=category,  # category is ForeignKey, assign the instance
                subcategory=subcategory.code if subcategory else "",  # subcategory is CharField, assign the code
                severity="medium",  # Default, AI will update
                priority="medium",  # Default, AI will update
                status="open",  # Start as open
                reference_number=reference_number,
                # Contact info from simplified form
                contact_name=name,
                contact_phone=phone,
                contact_email=email,
            )

            # Create initial update
            ComplaintUpdate.objects.create(
                complaint=complaint,
                update_type="note",
                message="Complaint submitted via public form. AI analysis running in background.",
            )

            # Trigger AI analysis in the background using Celery
            from .tasks import analyze_complaint_with_ai

            analyze_complaint_with_ai.delay(str(complaint.id))

            # If form was submitted via AJAX, return JSON
            if request.headers.get("x-requested-with") == "XMLHttpRequest":
                return JsonResponse(
                    {
                        "success": True,
                        "reference_number": reference_number,
                        "message": "Complaint submitted successfully. AI has analyzed and classified your complaint.",
                    }
                )

            # Otherwise, redirect to success page
            return redirect("complaints:public_complaint_success", reference=reference_number)

        except Hospital.DoesNotExist:
            error_msg = "Selected hospital not found."
            if request.headers.get("x-requested-with") == "XMLHttpRequest":
                return JsonResponse({"success": False, "message": error_msg}, status=400)
            messages.error(request, error_msg)
            return render(
                request,
                "complaints/public_complaint_form.html",
                {
                    "hospitals": Hospital.objects.filter(status="active").order_by("name"),
                },
            )
        except Exception as e:
            import traceback

            traceback.print_exc()
            # If AJAX, return error JSON
            if request.headers.get("x-requested-with") == "XMLHttpRequest":
                return JsonResponse({"success": False, "message": str(e)}, status=400)

            # Otherwise, show error message
            return render(
                request,
                "complaints/public_complaint_form.html",
                {"hospitals": Hospital.objects.filter(status="active").order_by("name"), "error": str(e)},
            )

    # GET request - show form
    return render(
        request,
        "complaints/public_complaint_form.html",
        {
            "hospitals": Hospital.objects.filter(status="active").order_by("name"),
        },
    )


def public_complaint_success(request, reference):
    """
    Success page after public complaint submission.
    """
    return render(request, "complaints/public_complaint_success.html", {"reference_number": reference})


def api_lookup_patient(request):
    """
    AJAX endpoint to look up patient by national ID.
    No authentication required for public form.
    """
    from apps.organizations.models import Patient

    national_id = request.GET.get("national_id")

    if not national_id:
        return JsonResponse({"found": False, "error": "National ID required"}, status=400)

    try:
        patient = Patient.objects.get(national_id=national_id, status="active")

        return JsonResponse(
            {
                "found": True,
                "mrn": patient.mrn,
                "name": patient.get_full_name(),
                "phone": patient.phone or "",
                "email": patient.email or "",
            }
        )

    except Patient.DoesNotExist:
        return JsonResponse({"found": False, "message": "Patient not found"})


def api_load_departments(request):
    """
    AJAX endpoint to load departments for a hospital.
    No authentication required for public form.
    """
    hospital_id = request.GET.get("hospital_id")

    if not hospital_id:
        return JsonResponse({"departments": []})

    departments = Department.objects.filter(hospital_id=hospital_id, status="active").values("id", "name")

    return JsonResponse({"departments": list(departments)})


def api_load_categories(request):
    """
    AJAX endpoint to load complaint categories for a hospital.
    Shows hospital-specific categories first, then system-wide categories.
    Returns both parent categories and their subcategories with parent_id.
    No authentication required for public form.
    """
    from .models import ComplaintCategory

    hospital_id = request.GET.get("hospital_id")

    # Build queryset
    if hospital_id:
        # Return hospital-specific and system-wide categories
        # Empty hospitals list = system-wide
        categories_queryset = (
            ComplaintCategory.objects.filter(Q(hospitals__id=hospital_id) | Q(hospitals__isnull=True), is_active=True)
            .distinct()
            .order_by("order", "name_en")
        )
    else:
        # Return only system-wide categories (empty hospitals list)
        categories_queryset = ComplaintCategory.objects.filter(hospitals__isnull=True, is_active=True).order_by(
            "order", "name_en"
        )

    # Get all categories with parent_id and descriptions
    categories = categories_queryset.values(
        "id", "name_en", "name_ar", "code", "parent_id", "description_en", "description_ar"
    )

    return JsonResponse({"categories": list(categories)})


# ============================================================================
# AJAX/API HELPERS (Authentication Required)
# ============================================================================


@login_required
def get_departments_by_hospital(request):
    """Get departments for a hospital (AJAX)"""
    hospital_id = request.GET.get("hospital_id")
    if not hospital_id:
        return JsonResponse({"departments": []})

    departments = Department.objects.filter(hospital_id=hospital_id, status="active").values("id", "name", "name_ar")

    return JsonResponse({"departments": list(departments)})


@login_required
def get_staff_by_department(request):
    """Get staff for a department (AJAX)"""
    department_id = request.GET.get("department_id")
    if not department_id:
        return JsonResponse({"staff": []})

    staff_members = Staff.objects.filter(department_id=department_id, status="active").values(
        "id", "first_name", "last_name", "staff_type", "job_title"
    )

    return JsonResponse({"staff": list(staff_members)})


@login_required
def search_patients(request):
    """Search patients by MRN or name (AJAX)"""
    from apps.organizations.models import Patient

    query = request.GET.get("q", "")
    if len(query) < 2:
        return JsonResponse({"patients": []})

    patients = Patient.objects.filter(
        Q(mrn__icontains=query)
        | Q(first_name__icontains=query)
        | Q(last_name__icontains=query)
        | Q(national_id__icontains=query)
    )[:10]

    results = [
        {
            "id": str(p.id),
            "mrn": p.mrn,
            "name": p.get_full_name(),
            "phone": p.phone,
            "email": p.email,
        }
        for p in patients
    ]

    return JsonResponse({"patients": results})


# ============================================================================
# SLA CONFIGURATION MANAGEMENT
# ============================================================================


@login_required
def sla_config_list(request):
    """
    SLA Configuration list view with filters.

    Allows Hospital Admins and PX Admins to manage SLA configurations.
    """
    from .models import ComplaintSLAConfig

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to manage SLA configurations.")
        return redirect("accounts:settings")

    # Base queryset
    queryset = ComplaintSLAConfig.objects.select_related("hospital").all()

    # Apply hospital filter
    if not user.is_px_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)

    # Apply filters from request
    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    severity_filter = request.GET.get("severity")
    if severity_filter:
        queryset = queryset.filter(severity=severity_filter)

    priority_filter = request.GET.get("priority")
    if priority_filter:
        queryset = queryset.filter(priority=priority_filter)

    is_active_filter = request.GET.get("is_active")
    if is_active_filter:
        queryset = queryset.filter(is_active=(is_active_filter == "true"))

    # Ordering
    order_by = request.GET.get("order_by", "hospital__name")
    queryset = queryset.order_by(order_by)

    # Pagination
    page_size = int(request.GET.get("page_size", 25))
    paginator = Paginator(queryset, page_size)
    page_number = request.GET.get("page", 1)
    page_obj = paginator.get_page(page_number)

    # Get filter options
    hospitals = Hospital.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        hospitals = hospitals.filter(id=user.hospital.id)

    from apps.core.models import SeverityChoices, PriorityChoices

    context = {
        "page_obj": page_obj,
        "sla_configs": page_obj.object_list,
        "hospitals": hospitals,
        "severity_choices": SeverityChoices.choices,
        "priority_choices": PriorityChoices.choices,
        "filters": request.GET,
    }

    return render(request, "complaints/sla_config_list.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def sla_config_create(request):
    """
    Create new SLA configuration.
    """
    from .models import ComplaintSLAConfig
    from .forms import SLAConfigForm

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to create SLA configurations.")
        return redirect("accounts:settings")

    if request.method == "POST":
        form = SLAConfigForm(request.POST, user=user)

        if form.is_valid():
            sla_config = form.save()

            # Log audit
            AuditService.log_event(
                event_type="sla_config_created",
                description=f"SLA configuration created: {sla_config}",
                user=request.user,
                content_object=sla_config,
                metadata={
                    "hospital": str(sla_config.hospital),
                    "severity": sla_config.severity,
                    "priority": sla_config.priority,
                    "sla_hours": sla_config.sla_hours,
                },
            )

            messages.success(request, "SLA configuration created successfully.")
            return redirect("complaints:sla_config_list")
        else:
            messages.error(request, "Please correct the errors below.")
    else:
        form = SLAConfigForm(user=user)

    context = {
        "form": form,
        "title": "Create SLA Configuration",
        "action": "Create",
    }

    return render(request, "complaints/sla_config_form.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def sla_config_edit(request, pk):
    """
    Edit existing SLA configuration.
    """
    from .models import ComplaintSLAConfig
    from .forms import SLAConfigForm

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to edit SLA configurations.")
        return redirect("accounts:settings")

    sla_config = get_object_or_404(ComplaintSLAConfig, pk=pk)

    # Check if user can edit this config
    if not user.is_px_admin() and sla_config.hospital != user.hospital:
        messages.error(request, "You don't have permission to edit this SLA configuration.")
        return redirect("complaints:sla_config_list")

    if request.method == "POST":
        form = SLAConfigForm(request.POST, user=user, instance=sla_config)

        if form.is_valid():
            sla_config = form.save()

            # Log audit
            AuditService.log_event(
                event_type="sla_config_updated",
                description=f"SLA configuration updated: {sla_config}",
                user=request.user,
                content_object=sla_config,
                metadata={
                    "hospital": str(sla_config.hospital),
                    "severity": sla_config.severity,
                    "priority": sla_config.priority,
                    "sla_hours": sla_config.sla_hours,
                },
            )

            messages.success(request, "SLA configuration updated successfully.")
            return redirect("complaints:sla_config_list")
        else:
            messages.error(request, "Please correct the errors below.")
    else:
        form = SLAConfigForm(user=user, instance=sla_config)

    context = {
        "form": form,
        "sla_config": sla_config,
        "title": "Edit SLA Configuration",
        "action": "Update",
    }

    return render(request, "complaints/sla_config_form.html", context)


@login_required
@require_http_methods(["POST"])
def sla_config_delete(request, pk):
    """
    Delete SLA configuration.
    """
    from .models import ComplaintSLAConfig

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to delete SLA configurations.")
        return redirect("accounts:settings")

    sla_config = get_object_or_404(ComplaintSLAConfig, pk=pk)

    # Check if user can delete this config
    if not user.is_px_admin() and sla_config.hospital != user.hospital:
        messages.error(request, "You don't have permission to delete this SLA configuration.")
        return redirect("complaints:sla_config_list")

    sla_config.delete()

    # Log audit
    AuditService.log_event(
        event_type="sla_config_deleted",
        description=f"SLA configuration deleted: {sla_config}",
        user=request.user,
        metadata={
            "hospital": str(sla_config.hospital),
            "severity": sla_config.severity,
            "priority": sla_config.priority,
        },
    )

    messages.success(request, "SLA configuration deleted successfully.")
    return redirect("complaints:sla_config_list")


@login_required
def escalation_rule_list(request):
    """
    Escalation Rules list view with filters.

    Allows Hospital Admins and PX Admins to manage escalation rules.
    """
    from .models import EscalationRule

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to manage escalation rules.")
        return redirect("accounts:settings")

    # Base queryset
    queryset = EscalationRule.objects.select_related("hospital", "escalate_to_user").all()

    # Apply hospital filter
    if not user.is_px_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)

    # Apply filters from request
    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    escalation_level_filter = request.GET.get("escalation_level")
    if escalation_level_filter:
        queryset = queryset.filter(escalation_level=escalation_level_filter)

    is_active_filter = request.GET.get("is_active")
    if is_active_filter:
        queryset = queryset.filter(is_active=(is_active_filter == "true"))

    # Ordering
    order_by = request.GET.get("order_by", "hospital__name")
    queryset = queryset.order_by(order_by)

    # Pagination
    page_size = int(request.GET.get("page_size", 25))
    paginator = Paginator(queryset, page_size)
    page_number = request.GET.get("page", 1)
    page_obj = paginator.get_page(page_number)

    # Get filter options
    hospitals = Hospital.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        hospitals = hospitals.filter(id=user.hospital.id)

    context = {
        "page_obj": page_obj,
        "escalation_rules": page_obj.object_list,
        "hospitals": hospitals,
        "filters": request.GET,
    }

    return render(request, "complaints/escalation_rule_list.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def escalation_rule_create(request):
    """
    Create new escalation rule.
    """
    from .models import EscalationRule
    from .forms import EscalationRuleForm

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to create escalation rules.")
        return redirect("accounts:settings")

    if request.method == "POST":
        form = EscalationRuleForm(request.POST, user=user)

        if form.is_valid():
            escalation_rule = form.save()

            # Log audit
            AuditService.log_event(
                event_type="escalation_rule_created",
                description=f"Escalation rule created: {escalation_rule}",
                user=request.user,
                content_object=escalation_rule,
                metadata={
                    "hospital": str(escalation_rule.hospital),
                    "name": escalation_rule.name,
                    "escalation_level": escalation_rule.escalation_level,
                },
            )

            messages.success(request, "Escalation rule created successfully.")
            return redirect("complaints:escalation_rule_list")
        else:
            messages.error(request, "Please correct the errors below.")
    else:
        form = EscalationRuleForm(user=user)

    context = {
        "form": form,
        "title": "Create Escalation Rule",
        "action": "Create",
    }

    return render(request, "complaints/escalation_rule_form.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def escalation_rule_edit(request, pk):
    """
    Edit existing escalation rule.
    """
    from .models import EscalationRule
    from .forms import EscalationRuleForm

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to edit escalation rules.")
        return redirect("accounts:settings")

    escalation_rule = get_object_or_404(EscalationRule, pk=pk)

    # Check if user can edit this rule
    if not user.is_px_admin() and escalation_rule.hospital != user.hospital:
        messages.error(request, "You don't have permission to edit this escalation rule.")
        return redirect("complaints:escalation_rule_list")

    if request.method == "POST":
        form = EscalationRuleForm(request.POST, user=user, instance=escalation_rule)

        if form.is_valid():
            escalation_rule = form.save()

            # Log audit
            AuditService.log_event(
                event_type="escalation_rule_updated",
                description=f"Escalation rule updated: {escalation_rule}",
                user=request.user,
                content_object=escalation_rule,
                metadata={
                    "hospital": str(escalation_rule.hospital),
                    "name": escalation_rule.name,
                    "escalation_level": escalation_rule.escalation_level,
                },
            )

            messages.success(request, "Escalation rule updated successfully.")
            return redirect("complaints:escalation_rule_list")
        else:
            messages.error(request, "Please correct the errors below.")
    else:
        form = EscalationRuleForm(user=user, instance=escalation_rule)

    context = {
        "form": form,
        "escalation_rule": escalation_rule,
        "title": "Edit Escalation Rule",
        "action": "Update",
    }

    return render(request, "complaints/escalation_rule_form.html", context)


@login_required
@require_http_methods(["POST"])
def escalation_rule_delete(request, pk):
    """
    Delete escalation rule.
    """
    from .models import EscalationRule

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to delete escalation rules.")
        return redirect("accounts:settings")

    escalation_rule = get_object_or_404(EscalationRule, pk=pk)

    # Check if user can delete this rule
    if not user.is_px_admin() and escalation_rule.hospital != user.hospital:
        messages.error(request, "You don't have permission to delete this escalation rule.")
        return redirect("complaints:escalation_rule_list")

    escalation_rule.delete()

    # Log audit
    AuditService.log_event(
        event_type="escalation_rule_deleted",
        description=f"Escalation rule deleted: {escalation_rule}",
        user=request.user,
        metadata={
            "hospital": str(escalation_rule.hospital),
            "name": escalation_rule.name,
        },
    )

    messages.success(request, "Escalation rule deleted successfully.")
    return redirect("complaints:escalation_rule_list")


@login_required
def complaint_threshold_list(request):
    """
    Complaint Threshold list view with filters.

    Allows Hospital Admins and PX Admins to manage complaint thresholds.
    """
    from .models import ComplaintThreshold

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to manage complaint thresholds.")
        return redirect("accounts:settings")

    # Base queryset
    queryset = ComplaintThreshold.objects.select_related("hospital").all()

    # Apply hospital filter
    if not user.is_px_admin() and user.hospital:
        queryset = queryset.filter(hospital=user.hospital)

    # Apply filters from request
    hospital_filter = request.GET.get("hospital")
    if hospital_filter:
        queryset = queryset.filter(hospital_id=hospital_filter)

    threshold_type_filter = request.GET.get("threshold_type")
    if threshold_type_filter:
        queryset = queryset.filter(threshold_type=threshold_type_filter)

    is_active_filter = request.GET.get("is_active")
    if is_active_filter:
        queryset = queryset.filter(is_active=(is_active_filter == "true"))

    # Ordering
    order_by = request.GET.get("order_by", "hospital__name")
    queryset = queryset.order_by(order_by)

    # Pagination
    page_size = int(request.GET.get("page_size", 25))
    paginator = Paginator(queryset, page_size)
    page_number = request.GET.get("page", 1)
    page_obj = paginator.get_page(page_number)

    # Get filter options
    hospitals = Hospital.objects.filter(status="active")
    if not user.is_px_admin() and user.hospital:
        hospitals = hospitals.filter(id=user.hospital.id)

    context = {
        "page_obj": page_obj,
        "thresholds": page_obj.object_list,
        "hospitals": hospitals,
        "filters": request.GET,
    }

    return render(request, "complaints/complaint_threshold_list.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def complaint_threshold_create(request):
    """
    Create new complaint threshold.
    """
    from .models import ComplaintThreshold
    from .forms import ComplaintThresholdForm

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to create complaint thresholds.")
        return redirect("accounts:settings")

    if request.method == "POST":
        form = ComplaintThresholdForm(request.POST, user=user)

        if form.is_valid():
            threshold = form.save()

            # Log audit
            AuditService.log_event(
                event_type="complaint_threshold_created",
                description=f"Complaint threshold created: {threshold}",
                user=request.user,
                content_object=threshold,
                metadata={
                    "hospital": str(threshold.hospital),
                    "threshold_type": threshold.threshold_type,
                    "threshold_value": threshold.threshold_value,
                },
            )

            messages.success(request, "Complaint threshold created successfully.")
            return redirect("complaints:complaint_threshold_list")
        else:
            messages.error(request, "Please correct the errors below.")
    else:
        form = ComplaintThresholdForm(user=user)

    context = {
        "form": form,
        "title": "Create Complaint Threshold",
        "action": "Create",
    }

    return render(request, "complaints/complaint_threshold_form.html", context)


@login_required
@require_http_methods(["GET", "POST"])
def complaint_threshold_edit(request, pk):
    """
    Edit existing complaint threshold.
    """
    from .models import ComplaintThreshold
    from .forms import ComplaintThresholdForm

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to edit complaint thresholds.")
        return redirect("accounts:settings")

    threshold = get_object_or_404(ComplaintThreshold, pk=pk)

    # Check if user can edit this threshold
    if not user.is_px_admin() and threshold.hospital != user.hospital:
        messages.error(request, "You don't have permission to edit this complaint threshold.")
        return redirect("complaints:complaint_threshold_list")

    if request.method == "POST":
        form = ComplaintThresholdForm(request.POST, user=user, instance=threshold)

        if form.is_valid():
            threshold = form.save()

            # Log audit
            AuditService.log_event(
                event_type="complaint_threshold_updated",
                description=f"Complaint threshold updated: {threshold}",
                user=request.user,
                content_object=threshold,
                metadata={
                    "hospital": str(threshold.hospital),
                    "threshold_type": threshold.threshold_type,
                    "threshold_value": threshold.threshold_value,
                },
            )

            messages.success(request, "Complaint threshold updated successfully.")
            return redirect("complaints:complaint_threshold_list")
        else:
            messages.error(request, "Please correct the errors below.")
    else:
        form = ComplaintThresholdForm(user=user, instance=threshold)

    context = {
        "form": form,
        "threshold": threshold,
        "title": "Edit Complaint Threshold",
        "action": "Update",
    }

    return render(request, "complaints/complaint_threshold_form.html", context)


@login_required
@require_http_methods(["POST"])
def complaint_threshold_delete(request, pk):
    """
    Delete complaint threshold.
    """
    from .models import ComplaintThreshold

    # Check permission
    user = request.user
    if not (user.is_px_admin() or user.is_hospital_admin()):
        messages.error(request, "You don't have permission to delete complaint thresholds.")
        return redirect("accounts:settings")

    threshold = get_object_or_404(ComplaintThreshold, pk=pk)

    # Check if user can delete this threshold
    if not user.is_px_admin() and threshold.hospital != user.hospital:
        messages.error(request, "You don't have permission to delete this complaint threshold.")
        return redirect("complaints:complaint_threshold_list")

    threshold.delete()

    # Log audit
    AuditService.log_event(
        event_type="complaint_threshold_deleted",
        description=f"Complaint threshold deleted: {threshold}",
        user=request.user,
        metadata={
            "hospital": str(threshold.hospital),
            "threshold_type": threshold.threshold_type,
        },
    )

    messages.success(request, "Complaint threshold deleted successfully.")
    return redirect("complaints:complaint_threshold_list")