from django import forms
from django.contrib import admin
from .models import (
    Hotel,
    UserHotel,
    APIConfiguration,
    Reservation,
    Room
)
from django.urls import path
from django.shortcuts import redirect
from django.utils.html import format_html
from pms_integration.api_client import APIClient

# Custom form for Hotel to filter APIConfiguration
class HotelForm(forms.ModelForm):
    class Meta:
        model = Hotel
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # Exclude APIs already linked to another hotel
        used_apis = Hotel.objects.exclude(api__isnull=True).values_list('api', flat=True)
        self.fields['api'].queryset = APIConfiguration.objects.exclude(id__in=used_apis)


@admin.register(Hotel)
class HotelAdmin(admin.ModelAdmin):
    list_display = ['name', 'hotel_id','room_count', 'pms', 'timezone', 'description']
    list_filter = ['name', 'pms', 'timezone']
    list_sorting = ['name', 'pms', 'room_count', 'timezone']
    def sync_button(self, obj):
        return format_html(
            '<a class="button" href="{}">Синхронизировать</a>',
            f"/admin/hotels/sync/{obj.id}/"
        )

    def get_urls(self):
        urls = super().get_urls()
        custom_urls = [
            path('sync/<int:hotel_id>/', self.sync_hotel_data),
        ]
        return custom_urls + urls
    def room_count(self, obj):
        """
        Подсчитывает количество комнат, связанных с отелем.
        """
        return Room.objects.filter(hotel=obj).count()
    room_count.short_description = "Количество комнат"

    def sync_button(self, obj):
        """
        Кнопка синхронизации данных.
        """
        return format_html(
            '<a class="button" href="{}">Синхронизировать</a>',
            f"/admin/hotels/sync/{obj.id}/"
        )

    def get_urls(self):
        """
        Добавление кастомного URL для синхронизации.
        """
        urls = super().get_urls()
        custom_urls = [
            path('sync/<int:hotel_id>/', self.sync_hotel_data),
        ]
        return custom_urls + urls

    def sync_hotel_data(self, request, hotel_id):
        """
        Метод синхронизации данных отеля.
        """
        try:
            hotel = Hotel.objects.get(id=hotel_id)
            client = APIClient(hotel.pms)
            client.run(hotel)
            self.message_user(request, f"Данные отеля {hotel.name} успешно синхронизированы.")
        except Exception as e:
            self.message_user(request, f"Ошибка: {str(e)}", level="error")
        return redirect("..")
    
@admin.register(UserHotel)
class UserHotelAdmin(admin.ModelAdmin):
    list_display = ('user', 'hotel')
    search_fields = ('user__username', 'hotel__name')
    # list_filter = ('hotel',)
    # ordering = ('-hotel',)

@admin.register(Reservation)
class ReservationAdmin(admin.ModelAdmin):
    list_display = ('reservation_id', 'hotel', 'room_number', 'room_type', 'check_in', 'check_out', 'status', 'price', 'discount')
    search_fields = ('hotel', 'room_number', 'room_type', 'check_in', 'check_out', 'status', 'price', 'discount')
    list_filter = ('hotel', 'room_number', 'room_type', 'check_in', 'check_out', 'status', 'price', 'discount')
    ordering = ('-check_in',)

@admin.register(Room)
class RoomAdmin(admin.ModelAdmin):
    list_display = ('hotel', 'number', 'external_id', 'description', 'created_at', 'updated_at')
    search_fields = ('hotel', 'number', 'external_id', 'description')
    list_filter = ('hotel', 'number', 'external_id','description', 'created_at', 'updated_at')
    ordering = ('-hotel', '-number')