from django.contrib import admin
from django.urls import reverse
from django.utils.html import format_html

from .models import Performance, Show, Venue


@admin.register(Show)
class ShowAdmin(admin.ModelAdmin):
    list_display = ("title", "slug", "is_published", "created_at", "updated_at")
    list_filter = ("is_published",)
    search_fields = ("title", "slug", "summary", "description")
    prepopulated_fields = {"slug": ("title",)}
    readonly_fields = ("created_at", "updated_at")


@admin.register(Venue)
class VenueAdmin(admin.ModelAdmin):
    list_display = ("name", "slug", "city", "address", "created_at", "updated_at")
    list_filter = ("city",)
    search_fields = ("name", "slug", "address", "city", "notes")
    prepopulated_fields = {"slug": ("name",)}
    readonly_fields = ("created_at", "updated_at")


@admin.register(Performance)
class PerformanceAdmin(admin.ModelAdmin):
    list_display = (
        "show",
        "venue",
        "starts_at",
        "room_capacity",
        "additional_seats",
        "manually_occupied_seats",
        "available_seats_display",
        "is_booking_enabled",
        "create_reservation_link",
    )
    list_filter = ("is_booking_enabled", "starts_at", "show", "venue")
    search_fields = ("show__title", "venue__name", "venue__city")
    list_select_related = ("show", "venue")
    readonly_fields = ("created_at", "updated_at", "available_seats_display")
    autocomplete_fields = ("show", "venue")

    @admin.display(description="Available seats")
    def available_seats_display(self, obj):
        if (
            not getattr(obj, "pk", None)
            or obj.room_capacity is None
            or obj.additional_seats is None
            or obj.manually_occupied_seats is None
        ):
            return "-"
        return obj.available_seats()

    @admin.display(description="Manual reservation")
    def create_reservation_link(self, obj):
        if not getattr(obj, "pk", None):
            return "-"

        url = reverse("admin:bookings_reservation_add")
        return format_html(
            '<a href="{}?performance={}">Create reservation</a>',
            url,
            obj.pk,
        )