<?php

namespace App\Filament\Resources;

use App\Filament\Resources\GuideResource\Pages;
use App\Models\Guide;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;

class GuideResource extends Resource
{
    protected static ?string $model = Guide::class;

    protected static ?string $navigationIcon = 'heroicon-o-book-open';

    protected static ?string $navigationLabel = '操作指引';

    protected static ?string $modelLabel = '指引';

    protected static ?string $pluralModelLabel = '指引';

    protected static ?int $navigationSort = 3;

    protected static ?string $navigationGroup = '业务管理';

    public static function shouldRegisterNavigation(): bool
    {
        return auth()->user()?->can('guide.view') ?? false;
    }

    public static function getEloquentQuery(): Builder
    {
        $query = parent::getEloquentQuery();
        $user = auth()->user();

        if ($user && $user->hasStationRestriction()) {
            $query->accessibleBy($user);
        }

        return $query;
    }

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Section::make('基本信息')
                    ->schema([
                        Forms\Components\TextInput::make('name')
                            ->label('指引名称')
                            ->required()
                            ->maxLength(255)
                            ->placeholder('例如: 如何用光'),

                        Forms\Components\Select::make('category')
                            ->label('分类')
                            ->required()
                            ->options([
                                'operation' => '操作指引',
                                'fault_handling' => '故障处理',
                                'training' => '培训教程',
                                'safety' => '安全规范',
                                'maintenance' => '维护保养',
                            ])
                            ->default('operation'),

                        Forms\Components\Select::make('status')
                            ->label('状态')
                            ->required()
                            ->options([
                                'draft' => '草稿',
                                'published' => '已发布',
                                'archived' => '已归档',
                            ])
                            ->default('draft'),

                        Forms\Components\TagsInput::make('tags')
                            ->label('标签')
                            ->placeholder('输入标签后回车')
                            ->helperText('用于分类和搜索的关键词标签'),

                        Forms\Components\Textarea::make('description')
                            ->label('描述')
                            ->maxLength(1000)
                            ->placeholder('简要描述此指引的用途')
                            ->columnSpanFull(),
                    ])
                    ->columns(2),

                Forms\Components\Section::make('关联线站')
                    ->schema([
                        Forms\Components\CheckboxList::make('stations')
                            ->label('适用线站')
                            ->relationship('stations', 'name')
                            ->searchable()
                            ->bulkToggleable()
                            ->helperText('选择此指引适用的线站，未关联线站的指引为全局指引')
                            ->columns(3),
                    ])
                    ->description('不关联任何线站则为全局指引，对所有终端可见'),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name')
                    ->label('指引名称')
                    ->searchable()
                    ->sortable()
                    ->weight('bold'),

                Tables\Columns\TextColumn::make('category')
                    ->label('分类')
                    ->badge()
                    ->formatStateUsing(fn(string $state): string => match ($state) {
                        'operation' => '操作指引',
                        'fault_handling' => '故障处理',
                        'training' => '培训教程',
                        'safety' => '安全规范',
                        'maintenance' => '维护保养',
                        default => $state,
                    })
                    ->color(fn(string $state): string => match ($state) {
                        'operation' => 'primary',
                        'fault_handling' => 'danger',
                        'training' => 'info',
                        'safety' => 'warning',
                        'maintenance' => 'gray',
                        default => 'gray',
                    })
                    ->sortable(),

                Tables\Columns\TextColumn::make('status')
                    ->label('状态')
                    ->badge()
                    ->formatStateUsing(fn(string $state): string => match ($state) {
                        'draft' => '草稿',
                        'published' => '已发布',
                        'archived' => '已归档',
                        default => $state,
                    })
                    ->color(fn(string $state): string => match ($state) {
                        'draft' => 'gray',
                        'published' => 'success',
                        'archived' => 'warning',
                        default => 'gray',
                    })
                    ->sortable(),

                Tables\Columns\TextColumn::make('pages_count')
                    ->label('页数')
                    ->counts('pages')
                    ->sortable(),

                Tables\Columns\TextColumn::make('stations_count')
                    ->label('关联线站')
                    ->counts('stations')
                    ->sortable()
                    ->badge()
                    ->color(fn(int $state): string => $state > 0 ? 'info' : 'success')
                    ->formatStateUsing(fn(int $state): string => $state > 0 ? "{$state} 个" : '全局'),

                Tables\Columns\TextColumn::make('created_at')
                    ->label('创建时间')
                    ->dateTime('Y-m-d H:i')
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                Tables\Filters\SelectFilter::make('category')
                    ->label('分类')
                    ->options([
                        'operation' => '操作指引',
                        'fault_handling' => '故障处理',
                        'training' => '培训教程',
                        'safety' => '安全规范',
                        'maintenance' => '维护保养',
                    ]),

                Tables\Filters\SelectFilter::make('status')
                    ->label('状态')
                    ->options([
                        'draft' => '草稿',
                        'published' => '已发布',
                        'archived' => '已归档',
                    ]),
            ])
            ->actions([
                Tables\Actions\EditAction::make()->label('编辑'),
                Tables\Actions\Action::make('duplicate')
                    ->label('复制')
                    ->icon('heroicon-o-document-duplicate')
                    ->color('info')
                    ->requiresConfirmation()
                    ->action(function (Guide $record) {
                        $newGuide = $record->replicate(['pages_count', 'stations_count']);
                        $newGuide->name = $record->name . ' (副本)';
                        $newGuide->created_by = auth()->id();
                        $newGuide->published_at = null;
                        $newGuide->save();

                        // 复制关联的线站
                        if ($record->stations()->count() > 0) {
                            $newGuide->stations()->sync($record->stations()->pluck('stations.id'));
                        }

                        // 复制页面
                        $pageIdMap = [];
                        foreach ($record->pages as $page) {
                            $newPage = $page->replicate();
                            $newPage->guide_id = $newGuide->id;
                            $newPage->save();
                            $pageIdMap[$page->id] = $newPage->id;
                        }

                        // 复制边（edges），并更新页面 ID 映射
                        foreach ($record->edges as $edge) {
                            $newEdge = $edge->replicate();
                            $newEdge->guide_id = $newGuide->id;
                            $newEdge->from_page_id = $pageIdMap[$edge->from_page_id] ?? $edge->from_page_id;
                            $newEdge->to_page_id = $pageIdMap[$edge->to_page_id] ?? $edge->to_page_id;
                            $newEdge->save();
                        }

                        return redirect()->to(route('filament.admin.resources.guides.edit', ['record' => $newGuide]));
                    }),
                Tables\Actions\DeleteAction::make()->label('删除'),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make()->label('批量删除'),
                ]),
            ])
            ->defaultSort('created_at', 'desc');
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListGuides::route('/'),
            'create' => Pages\CreateGuide::route('/create'),
            'edit' => Pages\EditGuide::route('/{record}/edit'),
            'manage-pages' => Pages\ManageGuidePages::route('/{record}/manage-pages'),
        ];
    }
}