from django.contrib import admin
from .models import Tournament, Registration, Round, Match


class RegistrationInline(admin.TabularInline):
    model = Registration
    fk_name = 'tournament'  # 👈 Wichtig: Explizite Rückverknüpfung zum Elternmodell
    extra = 0

@admin.register(Tournament)
class TournamentAdmin(admin.ModelAdmin):
    list_display = ('name', 'date', 'participant_count')
    search_fields = ('name',)
    inlines = [RegistrationInline]

    def participant_count(self, obj):
        return obj.registrations.count()
    participant_count.short_description = "Teilnehmer"


class MatchInline(admin.TabularInline):
    model = Match
    fk_name = 'round_detail'  # 👈 Wichtig: Explizite Rückverknüpfung zur Runde
    extra = 0

@admin.register(Round)
class RoundAdmin(admin.ModelAdmin):
    list_display = ('tournament', 'round_number')
    inlines = [MatchInline]


@admin.register(Match)
class MatchAdmin(admin.ModelAdmin):
    list_display = ('round_detail', 'player_white', 'player_black', 'result')
    list_filter = ('result', 'round_detail__tournament')