"""
Observations admin configuration.
"""
from django.contrib import admin
from django.utils.html import format_html

from .models import (
    Observation,
    ObservationAttachment,
    ObservationCategory,
    ObservationNote,
    ObservationStatusLog,
)


@admin.register(ObservationCategory)
class ObservationCategoryAdmin(admin.ModelAdmin):
    """Admin for ObservationCategory model."""
    list_display = ['name_en', 'name_ar', 'is_active', 'sort_order', 'observation_count', 'created_at']
    list_filter = ['is_active', 'created_at']
    search_fields = ['name_en', 'name_ar', 'description']
    ordering = ['sort_order', 'name_en']
    
    fieldsets = (
        (None, {
            'fields': ('name_en', 'name_ar', 'description')
        }),
        ('Settings', {
            'fields': ('icon', 'sort_order', 'is_active')
        }),
    )
    
    def observation_count(self, obj):
        return obj.observations.count()
    observation_count.short_description = 'Observations'


class ObservationAttachmentInline(admin.TabularInline):
    """Inline admin for ObservationAttachment."""
    model = ObservationAttachment
    extra = 0
    readonly_fields = ['filename', 'file_type', 'file_size', 'created_at']
    fields = ['file', 'filename', 'file_type', 'file_size', 'description', 'created_at']


class ObservationNoteInline(admin.TabularInline):
    """Inline admin for ObservationNote."""
    model = ObservationNote
    extra = 0
    readonly_fields = ['created_by', 'created_at']
    fields = ['note', 'is_internal', 'created_by', 'created_at']


class ObservationStatusLogInline(admin.TabularInline):
    """Inline admin for ObservationStatusLog."""
    model = ObservationStatusLog
    extra = 0
    readonly_fields = ['from_status', 'to_status', 'changed_by', 'comment', 'created_at']
    fields = ['from_status', 'to_status', 'changed_by', 'comment', 'created_at']
    can_delete = False
    
    def has_add_permission(self, request, obj=None):
        return False


@admin.register(Observation)
class ObservationAdmin(admin.ModelAdmin):
    """Admin for Observation model."""
    list_display = [
        'tracking_code', 'title_display', 'category', 'severity_badge',
        'status_badge', 'reporter_display', 'assigned_department',
        'assigned_to', 'created_at'
    ]
    list_filter = [
        'status', 'severity', 'category', 'assigned_department',
        'created_at', 'triaged_at', 'resolved_at'
    ]
    search_fields = [
        'tracking_code', 'title', 'description',
        'reporter_name', 'reporter_staff_id', 'location_text'
    ]
    readonly_fields = [
        'tracking_code', 'created_at', 'updated_at',
        'triaged_at', 'resolved_at', 'closed_at',
        'client_ip', 'user_agent'
    ]
    ordering = ['-created_at']
    date_hierarchy = 'created_at'
    
    fieldsets = (
        ('Tracking', {
            'fields': ('tracking_code', 'status')
        }),
        ('Content', {
            'fields': ('category', 'title', 'description', 'severity')
        }),
        ('Location & Time', {
            'fields': ('location_text', 'incident_datetime')
        }),
        ('Reporter Information', {
            'fields': ('reporter_staff_id', 'reporter_name', 'reporter_phone', 'reporter_email'),
            'classes': ('collapse',)
        }),
        ('Assignment', {
            'fields': ('assigned_department', 'assigned_to')
        }),
        ('Triage', {
            'fields': ('triaged_by', 'triaged_at'),
            'classes': ('collapse',)
        }),
        ('Resolution', {
            'fields': ('resolved_by', 'resolved_at', 'resolution_notes'),
            'classes': ('collapse',)
        }),
        ('Closure', {
            'fields': ('closed_by', 'closed_at'),
            'classes': ('collapse',)
        }),
        ('Action Center', {
            'fields': ('action_id',),
            'classes': ('collapse',)
        }),
        ('Metadata', {
            'fields': ('client_ip', 'user_agent', 'metadata', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )
    
    inlines = [ObservationAttachmentInline, ObservationNoteInline, ObservationStatusLogInline]
    
    def title_display(self, obj):
        if obj.title:
            return obj.title[:50] + '...' if len(obj.title) > 50 else obj.title
        return obj.description[:50] + '...' if len(obj.description) > 50 else obj.description
    title_display.short_description = 'Title/Description'
    
    def severity_badge(self, obj):
        colors = {
            'low': '#28a745',
            'medium': '#ffc107',
            'high': '#dc3545',
            'critical': '#343a40',
        }
        color = colors.get(obj.severity, '#6c757d')
        return format_html(
            '<span style="background-color: {}; color: white; padding: 3px 8px; '
            'border-radius: 4px; font-size: 11px;">{}</span>',
            color, obj.get_severity_display()
        )
    severity_badge.short_description = 'Severity'
    
    def status_badge(self, obj):
        colors = {
            'new': '#007bff',
            'triaged': '#17a2b8',
            'assigned': '#17a2b8',
            'in_progress': '#ffc107',
            'resolved': '#28a745',
            'closed': '#6c757d',
            'rejected': '#dc3545',
            'duplicate': '#6c757d',
        }
        color = colors.get(obj.status, '#6c757d')
        return format_html(
            '<span style="background-color: {}; color: white; padding: 3px 8px; '
            'border-radius: 4px; font-size: 11px;">{}</span>',
            color, obj.get_status_display()
        )
    status_badge.short_description = 'Status'
    
    def reporter_display(self, obj):
        if obj.is_anonymous:
            return format_html('<em style="color: #6c757d;">Anonymous</em>')
        return obj.reporter_display
    reporter_display.short_description = 'Reporter'


@admin.register(ObservationAttachment)
class ObservationAttachmentAdmin(admin.ModelAdmin):
    """Admin for ObservationAttachment model."""
    list_display = ['observation', 'filename', 'file_type', 'file_size_display', 'created_at']
    list_filter = ['file_type', 'created_at']
    search_fields = ['observation__tracking_code', 'filename', 'description']
    readonly_fields = ['file_size', 'created_at']
    
    def file_size_display(self, obj):
        if obj.file_size < 1024:
            return f"{obj.file_size} B"
        elif obj.file_size < 1024 * 1024:
            return f"{obj.file_size / 1024:.1f} KB"
        else:
            return f"{obj.file_size / (1024 * 1024):.1f} MB"
    file_size_display.short_description = 'Size'


@admin.register(ObservationNote)
class ObservationNoteAdmin(admin.ModelAdmin):
    """Admin for ObservationNote model."""
    list_display = ['observation', 'note_preview', 'created_by', 'is_internal', 'created_at']
    list_filter = ['is_internal', 'created_at']
    search_fields = ['observation__tracking_code', 'note', 'created_by__email']
    readonly_fields = ['created_at']
    
    def note_preview(self, obj):
        return obj.note[:100] + '...' if len(obj.note) > 100 else obj.note
    note_preview.short_description = 'Note'


@admin.register(ObservationStatusLog)
class ObservationStatusLogAdmin(admin.ModelAdmin):
    """Admin for ObservationStatusLog model."""
    list_display = ['observation', 'from_status', 'to_status', 'changed_by', 'created_at']
    list_filter = ['from_status', 'to_status', 'created_at']
    search_fields = ['observation__tracking_code', 'comment', 'changed_by__email']
    readonly_fields = ['observation', 'from_status', 'to_status', 'changed_by', 'comment', 'created_at']
    
    def has_add_permission(self, request):
        return False
    
    def has_change_permission(self, request, obj=None):
        return False