<?php

namespace App\Filament\Resources;

use App\Filament\Resources\PostResource\Pages;
use App\Filament\Resources\PostResource\RelationManagers;
use App\Models\Post;
use App\Models\Category;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\SoftDeletingScope;
use Illuminate\Support\Str;

class PostResource extends Resource
{
    protected static ?string $model = Post::class;

    protected static ?string $navigationIcon = 'heroicon-o-document-text';

    protected static ?string $navigationLabel = '文章管理';

    protected static ?string $modelLabel = '文章';

    protected static ?string $pluralModelLabel = '文章';

    protected static ?string $navigationGroup = '內容管理';

    protected static ?int $navigationSort = 2;

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Section::make('基本資訊')
                    ->schema([
                        Forms\Components\TextInput::make('title')
                            ->label('標題')
                            ->required()
                            ->maxLength(500)
                            ->live(onBlur: true)
                            ->afterStateUpdated(function (string $operation, $state, Forms\Set $set) {
                                if ($operation === 'create') {
                                    $set('slug', Str::slug($state));
                                }
                            })
                            ->columnSpanFull(),
                        Forms\Components\TextInput::make('slug')
                            ->label('Slug (URL 友善)')
                            ->required()
                            ->unique(Post::class, 'slug', ignoreRecord: true)
                            ->maxLength(500)
                            ->helperText('URL 友善的標識符，會自動從標題生成')
                            ->columnSpanFull(),
                        Forms\Components\Select::make('post_type')
                            ->label('文章類型')
                            ->required()
                            ->options([
                                'news' => '新聞',
                                'event' => '活動',
                            ])
                            ->default('news')
                            ->live()
                            ->reactive(),
                        Forms\Components\Select::make('status')
                            ->label('狀態')
                            ->required()
                            ->options([
                                'draft' => '草稿',
                                'publish' => '已發布',
                            ])
                            ->default('draft'),
                        Forms\Components\DateTimePicker::make('published_at')
                            ->label('發布時間')
                            ->default(now())
                            ->required(),
                        Forms\Components\DatePicker::make('date')
                            ->label('日期')
                            ->helperText('文章或活動日期')
                            ->required(),
                    ])
                    ->columns(2),

                Forms\Components\Section::make('內容')
                    ->schema([
                        Forms\Components\Textarea::make('excerpt')
                            ->label('摘要')
                            ->rows(3)
                            ->helperText('文章摘要（選填）')
                            ->columnSpanFull(),
                        Forms\Components\RichEditor::make('content')
                            ->label('完整內容')
                            ->helperText('文章完整內容（HTML）')
                            ->columnSpanFull(),
                    ]),

                Forms\Components\Section::make('圖片')
                    ->schema([
                        Forms\Components\FileUpload::make('image_url')
                            ->label('文章圖片')
                            ->image()
                            ->directory('posts')
                            ->helperText('上傳文章配圖')
                            ->columnSpanFull(),
                        Forms\Components\Toggle::make('featured_image')
                            ->label('特色圖片')
                            ->default(false)
                            ->helperText('標記為特色圖片'),
                    ])
                    ->columns(2),

                // 活動專屬欄位 (僅當 post_type = 'event' 時顯示)
                Forms\Components\Section::make('活動資訊')
                    ->schema([
                        Forms\Components\TextInput::make('time')
                            ->label('活動時間')
                            ->maxLength(50)
                            ->helperText('例如: 0830-1630')
                            ->placeholder('0830-1630'),
                        Forms\Components\TextInput::make('address')
                            ->label('活動地址')
                            ->maxLength(500)
                            ->helperText('活動舉辦地點')
                            ->columnSpanFull(),
                        Forms\Components\RichEditor::make('description')
                            ->label('活動說明')
                            ->helperText('活動詳細說明（HTML）')
                            ->columnSpanFull(),
                        Forms\Components\TextInput::make('link')
                            ->label('活動連結')
                            ->url()
                            ->maxLength(500)
                            ->helperText('活動報名或詳細資訊連結')
                            ->columnSpanFull(),
                    ])
                    ->columns(2)
                    ->visible(fn (Forms\Get $get): bool => $get('post_type') === 'event'),

                Forms\Components\Section::make('分類')
                    ->schema([
                        Forms\Components\CheckboxList::make('categories')
                            ->label('選擇分類')
                            ->relationship('categories', 'name')
                            ->options(Category::all()->pluck('name', 'id'))
                            ->helperText('文章可以屬於多個分類')
                            ->columnSpanFull(),
                    ]),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('title')
                    ->label('標題')
                    ->searchable()
                    ->sortable()
                    ->limit(50),
                Tables\Columns\BadgeColumn::make('post_type')
                    ->label('類型')
                    ->formatStateUsing(fn (string $state): string => match ($state) {
                        'news' => '新聞',
                        'event' => '活動',
                        default => $state,
                    })
                    ->colors([
                        'info' => 'news',
                        'warning' => 'event',
                    ]),
                Tables\Columns\BadgeColumn::make('status')
                    ->label('狀態')
                    ->formatStateUsing(fn (string $state): string => match ($state) {
                        'draft' => '草稿',
                        'publish' => '已發布',
                        default => $state,
                    })
                    ->colors([
                        'warning' => 'draft',
                        'success' => 'publish',
                    ]),
                Tables\Columns\TextColumn::make('published_at')
                    ->label('發布時間')
                    ->dateTime('Y-m-d H:i')
                    ->sortable(),
                Tables\Columns\TextColumn::make('date')
                    ->label('日期')
                    ->date('Y-m-d')
                    ->sortable(),
                Tables\Columns\TextColumn::make('categories.name')
                    ->label('分類')
                    ->badge()
                    ->separator(',')
                    ->color('success'),
                Tables\Columns\TextColumn::make('created_at')
                    ->label('建立時間')
                    ->dateTime('Y-m-d H:i')
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('updated_at')
                    ->label('更新時間')
                    ->dateTime('Y-m-d H:i')
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                Tables\Filters\SelectFilter::make('post_type')
                    ->label('文章類型')
                    ->options([
                        'news' => '新聞',
                        'event' => '活動',
                    ]),
                Tables\Filters\SelectFilter::make('status')
                    ->label('狀態')
                    ->options([
                        'draft' => '草稿',
                        'publish' => '已發布',
                    ]),
                Tables\Filters\SelectFilter::make('categories')
                    ->label('分類')
                    ->relationship('categories', 'name')
                    ->multiple(),
            ])
            ->actions([
                Tables\Actions\EditAction::make(),
                Tables\Actions\DeleteAction::make(),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make(),
                ]),
            ])
            ->defaultSort('published_at', 'desc');
    }

    public static function getRelations(): array
    {
        return [
            //
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListPosts::route('/'),
            'create' => Pages\CreatePost::route('/create'),
            'edit' => Pages\EditPost::route('/{record}/edit'),
        ];
    }
}