<?php

namespace App\Filament\Resources;

use App\Filament\Resources\PostResource\Pages;
use App\Models\Post;
use Filament\Actions\DeleteAction;
use Filament\Actions\EditAction;
use Filament\Actions\ViewAction;
use Filament\Forms\Components\ColorPicker;
use Filament\Forms\Components\DateTimePicker;
use Filament\Forms\Components\FileUpload;
use Filament\Forms\Components\Placeholder;
use Filament\Forms\Components\RichEditor;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\Textarea;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Toggle;
use Filament\Resources\Resource;
use Filament\Schemas\Components\Group;
use Filament\Schemas\Components\Section;
use Filament\Schemas\Schema;
use Filament\Tables\Columns\IconColumn;
use Filament\Tables\Columns\ImageColumn;
use Filament\Tables\Columns\TextColumn;
use Filament\Tables\Filters\SelectFilter;
use Filament\Tables\Filters\TernaryFilter;
use Filament\Tables\Table;
use Illuminate\Support\Str;

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

    public static function getNavigationIcon(): string|\BackedEnum|null
    {
        return 'heroicon-o-document-text';
    }

    public static function getNavigationSort(): ?int
    {
        return 0;
    }

    public static function getNavigationGroup(): ?string
    {
        return '内容管理';
    }

    public static function getModelLabel(): string
    {
        return '文章';
    }

    public static function getPluralModelLabel(): string
    {
        return '文章';
    }

    public static function form(Schema $schema): Schema
    {
        return $schema
            ->components([
                Group::make()
                    ->schema([
                        Section::make('文章内容')
                            ->schema([
                                TextInput::make('title')
                                    ->label('标题')
                                    ->required()
                                    ->maxLength(255)
                                    ->live(onBlur: true)
                                    ->afterStateUpdated(fn ($state, callable $set) => $set('slug', Str::slug($state))),

                                TextInput::make('slug')
                                    ->label('URL 别名')
                                    ->required()
                                    ->unique(ignoreRecord: true)
                                    ->maxLength(255),

                                Textarea::make('excerpt')
                                    ->label('摘要')
                                    ->rows(3)
                                    ->maxLength(500)
                                    ->helperText('文章简短描述，用于列表展示'),

                                RichEditor::make('content')
                                    ->label('正文')
                                    ->required()
                                    ->columnSpanFull()
                                    ->fileAttachmentsDisk('public')
                                    ->fileAttachmentsDirectory('posts'),
                            ])
                            ->columns(2),

                        Section::make('图片')
                            ->schema([
                                FileUpload::make('cover_image')
                                    ->label('封面图片')
                                    ->image()
                                    ->directory('posts/covers')
                                    ->imageEditor()
                                    ->imageEditorAspectRatios([
                                        '16:9',
                                        '4:3',
                                        '1:1',
                                    ]),

                                FileUpload::make('gallery')
                                    ->label('图片墙')
                                    ->image()
                                    ->multiple()
                                    ->reorderable()
                                    ->directory('posts/gallery')
                                    ->maxFiles(9)
                                    ->helperText('最多上传 9 张图片，ins 风格展示'),
                            ])
                            ->columns(2),
                    ])
                    ->columnSpan(['lg' => 2]),

                Group::make()
                    ->schema([
                        Section::make('发布设置')
                            ->schema([
                                Select::make('status')
                                    ->label('状态')
                                    ->options([
                                        'draft' => '草稿',
                                        'published' => '已发布',
                                        'scheduled' => '定时发布',
                                    ])
                                    ->default('draft')
                                    ->required()
                                    ->live(),

                                DateTimePicker::make('published_at')
                                    ->label('发布时间')
                                    ->default(now())
                                    ->visible(fn (callable $get) => in_array($get('status'), ['published', 'scheduled'])),

                                Toggle::make('is_featured')
                                    ->label('精选文章')
                                    ->helperText('精选文章将在首页突出显示'),
                            ]),

                        Section::make('分类与标签')
                            ->schema([
                                Select::make('category_id')
                                    ->label('分类')
                                    ->relationship('category', 'name')
                                    ->searchable()
                                    ->preload()
                                    ->createOptionForm([
                                        TextInput::make('name')
                                            ->label('分类名称')
                                            ->required(),
                                        TextInput::make('slug')
                                            ->label('别名')
                                            ->required(),
                                    ]),

                                Select::make('tags')
                                    ->label('标签')
                                    ->relationship('tags', 'name')
                                    ->multiple()
                                    ->searchable()
                                    ->preload()
                                    ->createOptionForm([
                                        TextInput::make('name')
                                            ->label('标签名称')
                                            ->required(),
                                        TextInput::make('slug')
                                            ->label('别名')
                                            ->required(),
                                        ColorPicker::make('color')
                                            ->label('颜色')
                                            ->default('#6366f1'),
                                    ]),
                            ]),

                        Section::make('统计信息')
                            ->schema([
                                Placeholder::make('views_count')
                                    ->label('浏览量')
                                    ->content(fn (?Post $record): string => $record?->views_count ?? '0'),

                                Placeholder::make('likes_count')
                                    ->label('点赞数')
                                    ->content(fn (?Post $record): string => $record?->likes_count ?? '0'),

                                Placeholder::make('created_at')
                                    ->label('创建时间')
                                    ->content(fn (?Post $record): string => $record?->created_at?->format('Y-m-d H:i:s') ?? '-'),

                                Placeholder::make('updated_at')
                                    ->label('更新时间')
                                    ->content(fn (?Post $record): string => $record?->updated_at?->format('Y-m-d H:i:s') ?? '-'),
                            ])
                            ->hidden(fn (?Post $record) => $record === null),
                    ])
                    ->columnSpan(['lg' => 1]),
            ])
            ->columns(3);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                ImageColumn::make('cover_image')
                    ->label('封面')
                    ->square(),

                TextColumn::make('title')
                    ->label('标题')
                    ->searchable()
                    ->sortable()
                    ->limit(40),

                TextColumn::make('category.name')
                    ->label('分类')
                    ->badge()
                    ->sortable(),

                TextColumn::make('status')
                    ->label('状态')
                    ->badge()
                    ->color(fn (string $state): string => match ($state) {
                        'draft' => 'gray',
                        'published' => 'success',
                        'scheduled' => 'warning',
                        default => 'gray',
                    })
                    ->formatStateUsing(fn (string $state): string => match ($state) {
                        'draft' => '草稿',
                        'published' => '已发布',
                        'scheduled' => '定时发布',
                        default => $state,
                    }),

                IconColumn::make('is_featured')
                    ->label('精选')
                    ->boolean(),

                TextColumn::make('views_count')
                    ->label('浏览')
                    ->numeric()
                    ->sortable(),

                TextColumn::make('published_at')
                    ->label('发布时间')
                    ->dateTime('Y-m-d H:i')
                    ->sortable(),

                TextColumn::make('created_at')
                    ->label('创建时间')
                    ->dateTime('Y-m-d H:i')
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->defaultSort('created_at', 'desc')
            ->filters([
                SelectFilter::make('status')
                    ->label('状态')
                    ->options([
                        'draft' => '草稿',
                        'published' => '已发布',
                        'scheduled' => '定时发布',
                    ]),

                SelectFilter::make('category')
                    ->label('分类')
                    ->relationship('category', 'name'),

                TernaryFilter::make('is_featured')
                    ->label('精选'),
            ])
            ->actions([
                ViewAction::make(),
                EditAction::make(),
                DeleteAction::make(),
            ])
            ->bulkActions([
                \Filament\Actions\BulkActionGroup::make([
                    \Filament\Actions\DeleteBulkAction::make(),
                ]),
            ]);
    }

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

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