"""
Django admin configuration for notifications app.
"""

from django.contrib import admin
from django.utils.translation import gettext_lazy as _

from .models import (
    MessageTemplate,
    Message,
    NotificationPreference,
    MessageLog,
)


@admin.register(MessageTemplate)
class MessageTemplateAdmin(admin.ModelAdmin):
    """Admin interface for MessageTemplate model."""
    
    list_display = ['code', 'name', 'channel', 'is_active', 'tenant']
    list_filter = ['channel', 'is_active', 'tenant']
    search_fields = ['code', 'name', 'body_en', 'body_ar']
    readonly_fields = ['id', 'created_at', 'updated_at']
    
    fieldsets = (
        (None, {
            'fields': ('code', 'name', 'channel', 'tenant', 'is_active')
        }),
        (_('Email Subject'), {
            'fields': ('subject',),
            'classes': ('collapse',)
        }),
        (_('Content (English)'), {
            'fields': ('body_en',)
        }),
        (_('Content (Arabic)'), {
            'fields': ('body_ar',),
            'classes': ('collapse',)
        }),
        (_('Variables'), {
            'fields': ('variables',),
            'classes': ('collapse',)
        }),
        (_('Metadata'), {
            'fields': ('id', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )


@admin.register(Message)
class MessageAdmin(admin.ModelAdmin):
    """Admin interface for Message model."""
    
    list_display = ['recipient', 'channel', 'status', 'sent_at', 'delivered_at', 'tenant']
    list_filter = ['channel', 'status', 'tenant', 'sent_at', 'delivered_at']
    search_fields = ['recipient', 'subject', 'body', 'provider_message_id']
    readonly_fields = ['id', 'is_successful', 'can_retry', 'created_at', 'updated_at']
    date_hierarchy = 'created_at'
    
    fieldsets = (
        (None, {
            'fields': ('template', 'channel', 'tenant', 'status')
        }),
        (_('Recipient & Content'), {
            'fields': ('recipient', 'subject', 'body')
        }),
        (_('Variables'), {
            'fields': ('variables_used',),
            'classes': ('collapse',)
        }),
        (_('Delivery Status'), {
            'fields': ('sent_at', 'delivered_at', 'is_successful', 'can_retry', 'retry_count')
        }),
        (_('Provider Information'), {
            'fields': ('provider_message_id', 'provider_response'),
            'classes': ('collapse',)
        }),
        (_('Error Information'), {
            'fields': ('error_message',),
            'classes': ('collapse',)
        }),
        (_('Metadata'), {
            'fields': ('id', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )


@admin.register(NotificationPreference)
class NotificationPreferenceAdmin(admin.ModelAdmin):
    """Admin interface for NotificationPreference model."""
    
    list_display = ['patient', 'preferred_channel', 'preferred_language', 'sms_enabled', 
                    'whatsapp_enabled', 'email_enabled']
    list_filter = ['preferred_channel', 'preferred_language', 'sms_enabled', 'whatsapp_enabled', 
                   'email_enabled']
    search_fields = ['patient__mrn', 'patient__first_name_en', 'patient__last_name_en']
    readonly_fields = ['id', 'created_at', 'updated_at']
    
    fieldsets = (
        (None, {
            'fields': ('patient', 'preferred_channel', 'preferred_language')
        }),
        (_('Channel Preferences'), {
            'fields': ('sms_enabled', 'whatsapp_enabled', 'email_enabled')
        }),
        (_('Notification Type Preferences'), {
            'fields': ('appointment_reminders', 'appointment_confirmations', 'results_notifications',
                      'billing_notifications', 'marketing_communications')
        }),
        (_('Metadata'), {
            'fields': ('id', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )


@admin.register(MessageLog)
class MessageLogAdmin(admin.ModelAdmin):
    """Admin interface for MessageLog model."""
    
    list_display = ['message', 'event_type', 'created_at']
    list_filter = ['event_type', 'created_at']
    search_fields = ['message__recipient', 'message__provider_message_id']
    readonly_fields = ['id', 'created_at', 'updated_at']
    date_hierarchy = 'created_at'
    
    fieldsets = (
        (None, {
            'fields': ('message', 'event_type')
        }),
        (_('Details'), {
            'fields': ('details',),
            'classes': ('collapse',)
        }),
        (_('Metadata'), {
            'fields': ('id', 'created_at', 'updated_at'),
            'classes': ('collapse',)
        }),
    )
    
    def has_add_permission(self, request):
        """Message logs should not be manually created."""
        return False
    
    def has_change_permission(self, request, obj=None):
        """Message logs should not be modified."""
        return False