from django.contrib import admin
from .models import Song, Artist, MusicAlbum, StorageMedium
from django import forms

class SongAdminForm(forms.ModelForm):
    class Meta:
        model = Song
        fields = ['song_title', 'release_year', 'duration']

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Dodaj placeholder do pola duration
        self.fields['duration'].widget.attrs['placeholder'] = 'HH:MM:SS'

        # Dodaj placeholder do pola rok
        self.fields['release_year'].widget.attrs['placeholder'] = 'Wprowadź rok wydania'


    def clean_duration(self):
        duration = self.cleaned_data['duration']

        # Sprawdzamy, czy duration ma poprawny format (HH:MM:SS)
        if duration.total_seconds() < 0:
            raise forms.ValidationError('Niewłaściwy format czasu. Użyj wartości nieujemnej.')

        # Sprawdzamy, czy duration nie przekracza 01:59:59
        if duration.total_seconds() > 7199:
            raise forms.ValidationError('Maksymalna długość to 1 godzina, 59 minut i 59 sekund.')

        return duration

class ArtistInline(admin.TabularInline):
    model = Artist.songs.through  # To jest model pośredniczący w relacji wiele-do-wielu
    extra = 1

@admin.register(Song)
class SongAdmin(admin.ModelAdmin):
    form = SongAdminForm
    list_display = ('song_title', 'release_year', 'duration', 'created_at', 'modified_at')
    list_filter = ('release_year',)
    search_fields = ('song_title',)
    readonly_fields = ['created_at', 'modified_at']
    inlines = [ArtistInline]

@admin.register(Artist)
class ArtistAdmin(admin.ModelAdmin):
    list_display = ('artist_name',)
    search_fields = ['artist_name']
    filter_horizontal = ('songs',)

class StorageMediumInline(admin.StackedInline):
    model = StorageMedium
    extra = 1
    filter_horizontal = ('songs',)

@admin.register(MusicAlbum)
class MusicAlbumAdmin(admin.ModelAdmin):
    search_fields = ['album_title']
    inlines = [StorageMediumInline]

@admin.register(StorageMedium)
class StorageMediumAdmin(admin.ModelAdmin):
    filter_horizontal = ('songs',)
    search_fields = ['disc_title']
    list_filter = ('albums_title',)