"""
Complaints admin
"""
from django.contrib import admin
from django.utils.html import format_html

from .models import (
    Complaint,
    ComplaintAttachment,
    ComplaintCategory,
    ComplaintMeeting,
    ComplaintPRInteraction,
    ComplaintSLAConfig,
    ComplaintThreshold,
    ComplaintUpdate,
    EscalationRule,
    Inquiry,
    ExplanationSLAConfig,
    ComplaintInvolvedDepartment,
    ComplaintInvolvedStaff,
    OnCallAdminSchedule,
    OnCallAdmin,
    ComplaintAdverseAction,
    ComplaintAdverseActionAttachment,
)

admin.site.register(ExplanationSLAConfig)

class ComplaintAttachmentInline(admin.TabularInline):
    """Inline admin for complaint attachments"""
    model = ComplaintAttachment
    extra = 0
    fields = ['file', 'filename', 'file_size', 'uploaded_by', 'description']
    readonly_fields = ['file_size']


class ComplaintUpdateInline(admin.TabularInline):
    """Inline admin for complaint updates"""
    model = ComplaintUpdate
    extra = 1
    fields = ['update_type', 'message', 'created_by', 'created_at']
    readonly_fields = ['created_at']
    ordering = ['-created_at']


class ComplaintInvolvedDepartmentInline(admin.TabularInline):
    """Inline admin for involved departments"""
    model = ComplaintInvolvedDepartment
    extra = 0
    fields = ['department', 'role', 'is_primary', 'assigned_to', 'response_submitted']
    autocomplete_fields = ['department', 'assigned_to']


class ComplaintInvolvedStaffInline(admin.TabularInline):
    """Inline admin for involved staff"""
    model = ComplaintInvolvedStaff
    extra = 0
    fields = ['staff', 'role', 'explanation_requested', 'explanation_received']
    autocomplete_fields = ['staff']


@admin.register(Complaint)
class ComplaintAdmin(admin.ModelAdmin):
    """Complaint admin"""
    list_display = [
        'title_preview', 'complaint_type_badge', 'patient', 'hospital', 
        'location_hierarchy', 'category',
        'severity_badge', 'status_badge', 'sla_indicator',
        'created_by', 'assigned_to', 'created_at'
    ]
    list_filter = [
        'status', 'severity', 'priority', 'category', 'source',
        'location', 'main_section', 'subsection',
        'is_overdue', 'hospital', 'created_by', 'created_at'
    ]
    search_fields = [
        'title', 'description', 'patient__mrn',
        'patient__first_name', 'patient__last_name', 'encounter_id'
    ]
    ordering = ['-created_at']
    date_hierarchy = 'created_at'
    inlines = [ComplaintUpdateInline, ComplaintAttachmentInline, ComplaintInvolvedDepartmentInline, ComplaintInvolvedStaffInline]

    fieldsets = (
        ('Patient & Encounter', {
            'fields': ('patient', 'encounter_id')
        }),
        ('Organization', {
            'fields': ('hospital', 'department', 'staff')
        }),
        ('Location Hierarchy', {
            'fields': ('location', 'main_section', 'subsection')
        }),
        ('Complaint Details', {
            'fields': ('complaint_type', 'title', 'description', 'category', 'subcategory')
        }),
        ('Classification', {
            'fields': ('priority', 'severity', 'source')
        }),
        ('Creator Tracking', {
            'fields': ('created_by',)
        }),
        ('Status & Assignment', {
            'fields': ('status', 'assigned_to', 'assigned_at')
        }),
        ('SLA Tracking', {
            'fields': ('due_at', 'is_overdue', 'reminder_sent_at', 'escalated_at')
        }),
        ('Resolution', {
            'fields': ('resolution', 'resolved_at', 'resolved_by')
        }),
        ('Closure', {
            'fields': ('closed_at', 'closed_by', 'resolution_survey', 'resolution_survey_sent_at')
        }),
        ('Metadata', {
            'fields': ('metadata', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = [
        'assigned_at', 'reminder_sent_at', 'escalated_at',
        'resolved_at', 'closed_at', 'resolution_survey_sent_at',
        'created_at', 'updated_at'
    ]

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related(
            'patient', 'hospital', 'department', 'staff',
            'location', 'main_section', 'subsection',
            'assigned_to', 'resolved_by', 'closed_by', 'resolution_survey',
            'created_by'
        )

    def title_preview(self, obj):
        """Show preview of title"""
        return obj.title[:60] + '...' if len(obj.title) > 60 else obj.title
    title_preview.short_description = 'Title'

    def location_hierarchy(self, obj):
        """Display location hierarchy in admin"""
        parts = []
        if obj.location:
            parts.append(obj.location.name)
        if obj.main_section:
            parts.append(obj.main_section.name)
        if obj.subsection:
            parts.append(obj.subsection.name)
        
        if not parts:
            return '—'
        
        hierarchy = ' → '.join(parts)
        return format_html('<span class="text-muted">{}</span>', hierarchy)
    location_hierarchy.short_description = 'Location'

    def severity_badge(self, obj):
        """Display severity with color badge"""
        colors = {
            'low': 'info',
            'medium': 'warning',
            'high': 'danger',
            'critical': 'danger',
        }
        color = colors.get(obj.severity, 'secondary')
        return format_html(
            '<span class="badge bg-{}">{}</span>',
            color,
            obj.get_severity_display()
        )
    severity_badge.short_description = 'Severity'

    def status_badge(self, obj):
        """Display status with color badge"""
        colors = {
            'open': 'danger',
            'in_progress': 'warning',
            'resolved': 'info',
            'closed': 'success',
            'cancelled': 'secondary',
        }
        color = colors.get(obj.status, 'secondary')
        return format_html(
            '<span class="badge bg-{}">{}</span>',
            color,
            obj.get_status_display()
        )
    status_badge.short_description = 'Status'

    def complaint_type_badge(self, obj):
        """Display complaint type with color badge"""
        colors = {
            'complaint': 'danger',
            'appreciation': 'success',
        }
        color = colors.get(obj.complaint_type, 'secondary')
        return format_html(
            '<span class="badge bg-{}">{}</span>',
            color,
            obj.get_complaint_type_display()
        )
    complaint_type_badge.short_description = 'Type'

    def sla_indicator(self, obj):
        """Display SLA status"""
        if obj.is_overdue:
            return format_html('<span class="badge bg-danger">OVERDUE</span>')

        from django.utils import timezone
        time_remaining = obj.due_at - timezone.now()
        hours_remaining = time_remaining.total_seconds() / 3600

        if hours_remaining < 4:
            return format_html('<span class="badge bg-warning">DUE SOON</span>')
        else:
            return format_html('<span class="badge bg-success">ON TIME</span>')
    sla_indicator.short_description = 'SLA'


@admin.register(ComplaintAttachment)
class ComplaintAttachmentAdmin(admin.ModelAdmin):
    """Complaint attachment admin"""
    list_display = ['complaint', 'filename', 'file_type', 'file_size', 'uploaded_by', 'created_at']
    list_filter = ['file_type', 'created_at']
    search_fields = ['filename', 'description', 'complaint__title']
    ordering = ['-created_at']

    fieldsets = (
        (None, {
            'fields': ('complaint', 'file', 'filename', 'file_type', 'file_size')
        }),
        ('Details', {
            'fields': ('uploaded_by', 'description')
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at')
        }),
    )

    readonly_fields = ['file_size', 'created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('complaint', 'uploaded_by')


@admin.register(ComplaintUpdate)
class ComplaintUpdateAdmin(admin.ModelAdmin):
    """Complaint update admin"""
    list_display = ['complaint', 'update_type', 'message_preview', 'created_by', 'created_at']
    list_filter = ['update_type', 'created_at']
    search_fields = ['message', 'complaint__title']
    ordering = ['-created_at']

    fieldsets = (
        (None, {
            'fields': ('complaint', 'update_type', 'message')
        }),
        ('Status Change', {
            'fields': ('old_status', 'new_status'),
            'classes': ('collapse',)
        }),
        ('Details', {
            'fields': ('created_by', 'metadata')
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at')
        }),
    )

    readonly_fields = ['created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('complaint', 'created_by')

    def message_preview(self, obj):
        """Show preview of message"""
        return obj.message[:100] + '...' if len(obj.message) > 100 else obj.message
    message_preview.short_description = 'Message'


@admin.register(Inquiry)
class InquiryAdmin(admin.ModelAdmin):
    """Inquiry admin"""
    list_display = [
        'subject_preview', 'patient', 'contact_name',
        'hospital', 'category', 'status', 'created_by', 'assigned_to', 'created_at'
    ]
    list_filter = ['status', 'category', 'source', 'hospital', 'created_by', 'created_at']
    search_fields = [
        'subject', 'message', 'contact_name', 'contact_phone',
        'patient__mrn', 'patient__first_name', 'patient__last_name'
    ]
    ordering = ['-created_at']

    fieldsets = (
        ('Patient Information', {
            'fields': ('patient',)
        }),
        ('Contact Information (if no patient)', {
            'fields': ('contact_name', 'contact_phone', 'contact_email'),
            'classes': ('collapse',)
        }),
        ('Organization', {
            'fields': ('hospital', 'department')
        }),
        ('Inquiry Details', {
            'fields': ('subject', 'message', 'category', 'source')
        }),
        ('Creator Tracking', {
            'fields': ('created_by',)
        }),
        ('Status & Assignment', {
            'fields': ('status', 'assigned_to')
        }),
        ('Response', {
            'fields': ('response', 'responded_at', 'responded_by')
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at')
        }),
    )

    readonly_fields = ['responded_at', 'created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related(
            'patient', 'hospital', 'department',
            'assigned_to', 'responded_by', 'created_by'
        )

    def subject_preview(self, obj):
        """Show preview of subject"""
        return obj.subject[:60] + '...' if len(obj.subject) > 60 else obj.subject
    subject_preview.short_description = 'Subject'


@admin.register(ComplaintSLAConfig)
class ComplaintSLAConfigAdmin(admin.ModelAdmin):
    """Complaint SLA Configuration admin"""
    list_display = [
        'hospital', 'source', 'severity', 'priority', 'sla_hours',
        'reminder_timing_display', 'is_active'
    ]
    list_filter = ['hospital', 'source', 'severity', 'priority', 'is_active']
    search_fields = ['hospital__name_en', 'hospital__name_ar', 'source__name_en']
    ordering = ['hospital', 'source', 'severity', 'priority']

    fieldsets = (
        ('Hospital', {
            'fields': ('hospital',)
        }),
        ('Source & Classification', {
            'fields': ('source', 'severity', 'priority')
        }),
        ('SLA Configuration', {
            'fields': ('sla_hours', 'reminder_hours_before')
        }),
        ('Source-Based Timing (Hours After Creation)', {
            'fields': (
                'first_reminder_hours_after',
                'second_reminder_hours_after',
                'escalation_hours_after'
            ),
            'description': 'When set, these override the "Hours Before Deadline" timing. Used for source-based SLAs (e.g., MOH, CCHI).'
        }),
        ('Status', {
            'fields': ('is_active',)
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = ['created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('hospital', 'source')

    def reminder_timing_display(self, obj):
        """Display reminder timing method"""
        if obj.source and obj.first_reminder_hours_after:
            return format_html(
                '<span class="badge bg-primary">Source-based: {}h / {}h</span>',
                obj.first_reminder_hours_after,
                obj.second_reminder_hours_after or 'N/A'
            )
        elif obj.reminder_hours_before:
            return format_html(
                '<span class="badge bg-info">Deadline-based: {}h before</span>',
                obj.reminder_hours_before
            )
        else:
            return '—'
    reminder_timing_display.short_description = 'Reminder Timing'


@admin.register(ComplaintCategory)
class ComplaintCategoryAdmin(admin.ModelAdmin):
    """Complaint Category admin"""
    list_display = [
        'name_en', 'code', 'hospitals_display', 'parent',
        'order', 'is_active'
    ]
    list_filter = ['is_active', 'parent']
    search_fields = ['name_en', 'name_ar', 'code', 'description_en']
    ordering = ['order', 'name_en']

    fieldsets = (
        ('Hospitals', {
            'fields': ('hospitals',)
        }),
        ('Category Details', {
            'fields': ('code', 'name_en', 'name_ar')
        }),
        ('Description', {
            'fields': ('description_en', 'description_ar'),
            'classes': ('collapse',)
        }),
        ('Hierarchy', {
            'fields': ('parent', 'order')
        }),
        ('Status', {
            'fields': ('is_active',)
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = ['created_at', 'updated_at']
    filter_horizontal = ['hospitals']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('parent').prefetch_related('hospitals')

    def hospitals_display(self, obj):
        """Display hospitals for category"""
        hospital_count = obj.hospitals.count()
        if hospital_count == 0:
            return 'System-wide'
        elif hospital_count == 1:
            return obj.hospitals.first().name
        else:
            return f'{hospital_count} hospitals'
    hospitals_display.short_description = 'Hospitals'


@admin.register(EscalationRule)
class EscalationRuleAdmin(admin.ModelAdmin):
    """Escalation Rule admin"""
    list_display = [
        'name', 'hospital', 'escalate_to_role',
        'trigger_on_overdue', 'order', 'is_active'
    ]
    list_filter = [
        'hospital', 'escalate_to_role', 'trigger_on_overdue',
        'severity_filter', 'priority_filter', 'is_active'
    ]
    search_fields = ['name', 'description', 'hospital__name_en']
    ordering = ['hospital', 'order']

    fieldsets = (
        ('Hospital', {
            'fields': ('hospital',)
        }),
        ('Rule Details', {
            'fields': ('name', 'description')
        }),
        ('Trigger Conditions', {
            'fields': ('trigger_on_overdue', 'trigger_hours_overdue')
        }),
        ('Escalation Target', {
            'fields': ('escalate_to_role', 'escalate_to_user')
        }),
        ('Filters', {
            'fields': ('severity_filter', 'priority_filter'),
            'classes': ('collapse',)
        }),
        ('Order & Status', {
            'fields': ('order', 'is_active')
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = ['created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('hospital', 'escalate_to_user')


@admin.register(ComplaintThreshold)
class ComplaintThresholdAdmin(admin.ModelAdmin):
    """Complaint Threshold admin"""
    list_display = [
        'hospital', 'threshold_type', 'comparison_display',
        'threshold_value', 'action_type', 'is_active'
    ]
    list_filter = [
        'hospital', 'threshold_type', 'comparison_operator',
        'action_type', 'is_active'
    ]
    search_fields = ['hospital__name_en', 'hospital__name_ar']
    ordering = ['hospital', 'threshold_type']

    fieldsets = (
        ('Hospital', {
            'fields': ('hospital',)
        }),
        ('Threshold Configuration', {
            'fields': ('threshold_type', 'threshold_value', 'comparison_operator')
        }),
        ('Action', {
            'fields': ('action_type',)
        }),
        ('Status', {
            'fields': ('is_active',)
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = ['created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('hospital')

    def comparison_display(self, obj):
        """Display comparison operator"""
        return f"{obj.get_comparison_operator_display()}"
    comparison_display.short_description = 'Comparison'


@admin.register(ComplaintPRInteraction)
class ComplaintPRInteractionAdmin(admin.ModelAdmin):
    """PR Interaction admin"""
    list_display = [
        'complaint', 'contact_date', 'contact_method_display',
        'pr_staff', 'procedure_explained', 'created_at'
    ]
    list_filter = [
        'contact_method', 'procedure_explained', 'created_at'
    ]
    search_fields = [
        'complaint__title', 'statement_text', 'notes',
        'pr_staff__first_name', 'pr_staff__last_name'
    ]
    ordering = ['-contact_date']

    fieldsets = (
        ('Complaint', {
            'fields': ('complaint',)
        }),
        ('Contact Details', {
            'fields': ('contact_date', 'contact_method', 'pr_staff')
        }),
        ('Interaction Details', {
            'fields': ('statement_text', 'procedure_explained', 'notes')
        }),
        ('Metadata', {
            'fields': ('created_by', 'created_at', 'updated_at')
        }),
    )

    readonly_fields = ['created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('complaint', 'pr_staff', 'created_by')

    def contact_method_display(self, obj):
        """Display contact method"""
        return obj.get_contact_method_display()
    contact_method_display.short_description = 'Method'


@admin.register(ComplaintMeeting)
class ComplaintMeetingAdmin(admin.ModelAdmin):
    """Complaint Meeting admin"""
    list_display = [
        'complaint', 'meeting_date', 'meeting_type_display',
        'outcome_preview', 'created_by', 'created_at'
    ]
    list_filter = [
        'meeting_type', 'created_at'
    ]
    search_fields = [
        'complaint__title', 'outcome', 'notes'
    ]
    ordering = ['-meeting_date']

    fieldsets = (
        ('Complaint', {
            'fields': ('complaint',)
        }),
        ('Meeting Details', {
            'fields': ('meeting_date', 'meeting_type')
        }),
        ('Meeting Outcome', {
            'fields': ('outcome', 'notes')
        }),
        ('Metadata', {
            'fields': ('created_by', 'created_at', 'updated_at')
        }),
    )

    readonly_fields = ['created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('complaint', 'created_by')

    def meeting_type_display(self, obj):
        """Display meeting type"""
        return obj.get_meeting_type_display()
    meeting_type_display.short_description = 'Type'

    def outcome_preview(self, obj):
        """Show preview of outcome"""
        return obj.outcome[:100] + '...' if len(obj.outcome) > 100 else obj.outcome
    outcome_preview.short_description = 'Outcome'


@admin.register(ComplaintInvolvedDepartment)
class ComplaintInvolvedDepartmentAdmin(admin.ModelAdmin):
    """Complaint Involved Department admin"""
    list_display = [
        'complaint', 'department', 'role', 'is_primary',
        'assigned_to', 'response_submitted', 'created_at'
    ]
    list_filter = ['role', 'is_primary', 'response_submitted', 'created_at']
    search_fields = [
        'complaint__title', 'complaint__reference_number',
        'department__name', 'notes'
    ]
    ordering = ['-is_primary', '-created_at']
    autocomplete_fields = ['complaint', 'department', 'assigned_to', 'added_by']

    fieldsets = (
        ('Complaint', {
            'fields': ('complaint',)
        }),
        ('Department & Role', {
            'fields': ('department', 'role', 'is_primary')
        }),
        ('Assignment', {
            'fields': ('assigned_to', 'assigned_at')
        }),
        ('Response', {
            'fields': ('response_submitted', 'response_submitted_at', 'response_notes')
        }),
        ('Notes', {
            'fields': ('notes',)
        }),
        ('Metadata', {
            'fields': ('added_by', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = ['assigned_at', 'response_submitted_at', 'created_at', 'updated_at']

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related(
            'complaint', 'department', 'assigned_to', 'added_by'
        )


@admin.register(ComplaintInvolvedStaff)
class ComplaintInvolvedStaffAdmin(admin.ModelAdmin):
    """Complaint Involved Staff admin"""
    list_display = [
        'complaint', 'staff', 'role',
        'explanation_requested', 'explanation_received', 'created_at'
    ]
    list_filter = ['role', 'explanation_requested', 'explanation_received', 'created_at']
    search_fields = [
        'complaint__title', 'complaint__reference_number',
        'staff__first_name', 'staff__last_name', 'notes'
    ]
    ordering = ['role', '-created_at']
    autocomplete_fields = ['complaint', 'staff', 'added_by']

    fieldsets = (
        ('Complaint', {
            'fields': ('complaint',)
        }),
        ('Staff & Role', {
            'fields': ('staff', 'role')
        }),
        ('Explanation', {
            'fields': (
                'explanation_requested', 'explanation_requested_at',
                'explanation_received', 'explanation_received_at', 'explanation'
            )
        }),
        ('Notes', {
            'fields': ('notes',)
        }),
        ('Metadata', {
            'fields': ('added_by', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )

    readonly_fields = [
        'explanation_requested_at', 'explanation_received_at',
        'created_at', 'updated_at'
    ]

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related(
            'complaint', 'staff', 'added_by'
        )



class OnCallAdminInline(admin.TabularInline):
    """Inline admin for on-call admins"""
    model = OnCallAdmin
    extra = 1
    fields = [
        'admin_user', 'start_date', 'end_date', 
        'notification_priority', 'is_active',
        'notify_email', 'notify_sms', 'sms_phone'
    ]
    autocomplete_fields = ['admin_user']
    
    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('admin_user')


@admin.register(OnCallAdminSchedule)
class OnCallAdminScheduleAdmin(admin.ModelAdmin):
    """On-Call Admin Schedule admin"""
    list_display = [
        'hospital_or_system', 'working_hours_display',
        'working_days_display', 'timezone', 'is_active', 'created_at'
    ]
    list_filter = ['is_active', 'timezone', 'created_at']
    search_fields = ['hospital__name']
    inlines = [OnCallAdminInline]
    
    fieldsets = (
        ('Scope', {
            'fields': ('hospital', 'is_active')
        }),
        ('Working Hours Configuration', {
            'fields': ('work_start_time', 'work_end_time', 'timezone', 'working_days'),
            'description': 'Configure working hours. Outside these hours, only on-call admins will be notified.'
        }),
    )
    
    readonly_fields = ['created_at', 'updated_at']
    
    def hospital_or_system(self, obj):
        """Display hospital name or 'System-wide'"""
        if obj.hospital:
            return obj.hospital.name
        return format_html('<span style="color: #007bbd; font-weight: bold;">System-wide</span>')
    hospital_or_system.short_description = 'Scope'
    hospital_or_system.admin_order_field = 'hospital__name'
    
    def working_hours_display(self, obj):
        """Display working hours"""
        return f"{obj.work_start_time.strftime('%H:%M')} - {obj.work_end_time.strftime('%H:%M')}"
    working_hours_display.short_description = 'Working Hours'
    
    def working_days_display(self, obj):
        """Display working days as abbreviated day names"""
        days = obj.get_working_days_list()
        day_names = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
        selected_days = [day_names[d] for d in days if 0 <= d <= 6]
        return ', '.join(selected_days) if selected_days else 'None'
    working_days_display.short_description = 'Working Days'
    
    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('hospital')


@admin.register(OnCallAdmin)
class OnCallAdminAdmin(admin.ModelAdmin):
    """On-Call Admin admin"""
    list_display = [
        'admin_user', 'schedule', 'notification_priority',
        'date_range', 'contact_preferences', 'is_active'
    ]
    list_filter = [
        'is_active', 'notify_email', 'notify_sms',
        'schedule__hospital', 'created_at'
    ]
    search_fields = [
        'admin_user__email', 'admin_user__first_name', 
        'admin_user__last_name', 'sms_phone'
    ]
    autocomplete_fields = ['admin_user', 'schedule']
    
    fieldsets = (
        ('Assignment', {
            'fields': ('schedule', 'admin_user', 'is_active')
        }),
        ('Active Period (Optional)', {
            'fields': ('start_date', 'end_date'),
            'description': 'Leave empty for permanent assignment'
        }),
        ('Notification Settings', {
            'fields': (
                'notification_priority', 'notify_email', 'notify_sms', 'sms_phone'
            ),
            'description': 'Configure how this admin should be notified for after-hours complaints'
        }),
    )
    
    readonly_fields = ['created_at', 'updated_at']
    
    def date_range(self, obj):
        """Display date range"""
        if obj.start_date and obj.end_date:
            return f"{obj.start_date} to {obj.end_date}"
        elif obj.start_date:
            return f"From {obj.start_date}"
        elif obj.end_date:
            return f"Until {obj.end_date}"
        return format_html('<span style="color: green;">Permanent</span>')
    date_range.short_description = 'Active Period'
    
    def contact_preferences(self, obj):
        """Display contact preferences"""
        prefs = []
        if obj.notify_email:
            prefs.append('📧 Email')
        if obj.notify_sms:
            prefs.append(f'📱 SMS ({obj.sms_phone or "user phone"})')
        return ', '.join(prefs) if prefs else 'None'
    contact_preferences.short_description = 'Contact'
    
    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('admin_user', 'schedule', 'schedule__hospital')



class ComplaintAdverseActionAttachmentInline(admin.TabularInline):
    """Inline admin for adverse action attachments"""
    model = ComplaintAdverseActionAttachment
    extra = 0
    fields = ['file', 'filename', 'description', 'uploaded_by']
    readonly_fields = ['filename', 'file_size']


@admin.register(ComplaintAdverseAction)
class ComplaintAdverseActionAdmin(admin.ModelAdmin):
    """Admin for complaint adverse actions"""
    list_display = [
        'complaint_reference', 'action_type_display', 'severity_badge',
        'incident_date', 'status_badge', 'is_escalated', 'created_at'
    ]
    list_filter = [
        'action_type', 'severity', 'status', 'is_escalated',
        'incident_date', 'created_at'
    ]
    search_fields = [
        'complaint__reference_number', 'complaint__title',
        'description', 'patient_impact'
    ]
    date_hierarchy = 'incident_date'
    inlines = [ComplaintAdverseActionAttachmentInline]
    
    fieldsets = (
        ('Complaint Information', {
            'fields': ('complaint',)
        }),
        ('Adverse Action Details', {
            'fields': (
                'action_type', 'severity', 'description',
                'incident_date', 'location'
            )
        }),
        ('Impact & Staff', {
            'fields': (
                'patient_impact', 'involved_staff'
            )
        }),
        ('Verification & Investigation', {
            'fields': (
                'status', 'reported_by',
                'investigation_notes', 'investigated_by', 'investigated_at'
            ),
            'classes': ('collapse',)
        }),
        ('Resolution', {
            'fields': (
                'resolution', 'resolved_by', 'resolved_at'
            ),
            'classes': ('collapse',)
        }),
        ('Escalation', {
            'fields': (
                'is_escalated', 'escalated_at'
            )
        }),
    )
    
    readonly_fields = ['created_at', 'updated_at']
    
    def complaint_reference(self, obj):
        """Display complaint reference"""
        return format_html(
            '<a href="/admin/complaints/complaint/{}/change/">{}</a>',
            obj.complaint.id,
            obj.complaint.reference_number
        )
    complaint_reference.short_description = 'Complaint'
    
    def action_type_display(self, obj):
        """Display action type with formatting"""
        return obj.get_action_type_display()
    action_type_display.short_description = 'Action Type'
    
    def severity_badge(self, obj):
        """Display severity as colored badge"""
        colors = {
            'low': '#22c55e',      # green
            'medium': '#f59e0b',   # amber
            'high': '#ef4444',     # red
            'critical': '#7f1d1d', # dark red
        }
        color = colors.get(obj.severity, '#64748b')
        return format_html(
            '<span style="background-color: {}; color: white; padding: 2px 8px; border-radius: 4px; font-size: 11px;">{}</span>',
            color,
            obj.get_severity_display()
        )
    severity_badge.short_description = 'Severity'
    
    def status_badge(self, obj):
        """Display status as colored badge"""
        colors = {
            'reported': '#f59e0b',
            'under_investigation': '#3b82f6',
            'verified': '#22c55e',
            'unfounded': '#64748b',
            'resolved': '#10b981',
        }
        color = colors.get(obj.status, '#64748b')
        return format_html(
            '<span style="background-color: {}; color: white; padding: 2px 8px; border-radius: 4px; font-size: 11px;">{}</span>',
            color,
            obj.get_status_display()
        )
    status_badge.short_description = 'Status'
    
    def get_queryset(self, request):
        qs = super().get_queryset(request)
        return qs.select_related('complaint', 'reported_by', 'investigated_by', 'resolved_by')


@admin.register(ComplaintAdverseActionAttachment)
class ComplaintAdverseActionAttachmentAdmin(admin.ModelAdmin):
    """Admin for adverse action attachments"""
    list_display = ['adverse_action', 'filename', 'file_type', 'uploaded_by', 'created_at']
    list_filter = ['file_type', 'created_at']
    search_fields = ['filename', 'description', 'adverse_action__complaint__reference_number']
    ordering = ['-created_at']