<?php

namespace App\Filament\Resources;

use App\Filament\Resources\TextbookSeriesResource\Pages;
use App\Models\TextbookSeries;
use App\Services\TextbookApiService;
use BackedEnum;
use UnitEnum;
use Filament\Facades\Filament;
use Filament\Schemas\Schema;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\Toggle;
use Filament\Forms\Components\Textarea;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Columns\TextColumn;
use Filament\Tables\Columns\BadgeColumn;
use Filament\Tables\Columns\ToggleColumn;
use Filament\Actions\EditAction;
use Filament\Actions\DeleteAction;
use Filament\Actions\Action;
use Illuminate\Database\Eloquent\Model;

class TextbookSeriesResource extends Resource
{
    protected static ?string $model = TextbookSeries::class;

    protected static ?string $recordTitleAttribute = 'name';

    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-rectangle-stack';

    protected static ?string $navigationLabel = '教材系列';

    protected static UnitEnum|string|null $navigationGroup = '教材管理';

    protected static ?int $navigationSort = 1;

    protected static ?TextbookApiService $apiService = null;

    public static function boot()
    {
        parent::boot();
        static::$apiService = app(TextbookApiService::class);
    }

    protected static function getApiService(): TextbookApiService
    {
        if (!static::$apiService) {
            static::$apiService = app(TextbookApiService::class);
        }
        return static::$apiService;
    }

    public static function form(Schema $schema): Schema
    {
        return $schema
            ->schema([
                TextInput::make('name')
                    ->label('系列名称')
                    ->required()
                    ->maxLength(128)
                    ->placeholder('如：人教版、北师大版、华东师大版'),

                TextInput::make('slug')
                    ->label('别名')
                    ->maxLength(64)
                    ->placeholder('如：pep、bsd、ecnu'),

                TextInput::make('publisher')
                    ->label('出版社')
                    ->maxLength(128)
                    ->placeholder('如：人民教育出版社'),

                TextInput::make('region')
                    ->label('适用地区')
                    ->maxLength(128)
                    ->placeholder('如：全国、江苏省、浙江省'),

                TextInput::make('stages')
                    ->label('适用学段')
                    ->helperText('JSON 格式，如：["primary", "junior"]')
                    ->placeholder('["primary", "junior", "senior"]')
                    ->formatStateUsing(fn ($state) => is_array($state) ? json_encode($state, JSON_UNESCAPED_UNICODE) : $state)
                    ->dehydrateStateUsing(fn ($state) => is_string($state) ? json_decode($state, true) : $state),

                TextInput::make('start_year')
                    ->label('起始年份')
                    ->numeric()
                    ->placeholder('如：2024'),

                Select::make('is_active')
                    ->label('是否启用')
                    ->options(function (): array {
                        return [
                            1 => '已启用',
                            0 => '已停用',
                        ];
                    })
                    ->default(1)
                    ->required()
                    ->native(false)
                    ->selectablePlaceholder(false)
                    ->helperText('选择是否启用此教材系列'),

                TextInput::make('sort_order')
                    ->label('排序')
                    ->numeric()
                    ->default(0)
                    ->helperText('数字越小排序越靠前'),

                Textarea::make('meta')
                    ->label('扩展信息')
                    ->placeholder('JSON 格式，如：{"website": "http://example.com", "description": "说明"}')
                    ->formatStateUsing(fn ($state) => is_array($state) ? json_encode($state, JSON_UNESCAPED_UNICODE) : $state)
                    ->dehydrateStateUsing(fn ($state) => is_string($state) ? json_decode($state, true) : $state)
                    ->columnSpanFull(),
            ]);
    }

    public static function table(Tables\Table $table): Tables\Table
    {
        return $table
            ->columns([
                TextColumn::make('id')
                    ->label('ID')
                    ->sortable()
                    ->copyable()
                    ->copyMessage('ID 已复制'),

                TextColumn::make('name')
                    ->label('系列名称')
                    ->searchable()
                    ->sortable(),

                TextColumn::make('slug')
                    ->label('别名')
                    ->searchable()
                    ->copyable(),

                TextColumn::make('publisher')
                    ->label('出版社')
                    ->searchable(),

                TextColumn::make('region')
                    ->label('适用地区')
                    ->searchable(),

                BadgeColumn::make('stages')
                    ->label('学段')
                    ->formatStateUsing(function ($state): string {
                        // 确保返回字符串，即使输入是数组
                        if (is_string($state)) {
                            $stages = json_decode($state, true) ?? [];
                        } elseif (is_array($state)) {
                            $stages = $state;
                        } else {
                            return '';
                        }

                        $stageMap = [
                            'primary' => '小学',
                            'junior' => '初中',
                            'senior' => '高中',
                        ];
                        return implode(', ', array_map(fn($s) => $stageMap[$s] ?? $s, $stages));
                    })
                    ->separator(',')
                    ->color('success'),

                TextColumn::make('start_year')
                    ->label('起始年份')
                    ->sortable(),

                ToggleColumn::make('is_active')
                    ->label('启用状态'),

                TextColumn::make('sort_order')
                    ->label('排序')
                    ->sortable(),

                TextColumn::make('created_at')
                    ->label('创建时间')
                    ->dateTime('Y-m-d H:i')
                    ->sortable()
                    ->toggleable(),
            ])
            ->filters([
                Tables\Filters\SelectFilter::make('is_active')
                    ->label('启用状态')
                    ->options([
                        1 => '已启用',
                        0 => '已停用',
                    ]),
            ])
            ->actions([
                EditAction::make()
                    ->label('编辑'),

                DeleteAction::make()
                    ->label('删除'),

                Action::make('view_textbooks')
                    ->label('查看教材')
                    ->icon('heroicon-o-book-open')
                    ->url(fn(Model $record): string =>
                        route('filament.admin.resources.textbooks.index', ['tableFilters[series_id][value]' => $record->id])
                    ),
            ])
            ->bulkActions([
                \Filament\Actions\BulkActionGroup::make([
                    \Filament\Actions\DeleteBulkAction::make()
                        ->label('批量删除'),

                    \Filament\Actions\BulkAction::make('activate')
                        ->label('批量启用')
                        ->icon('heroicon-o-check-circle')
                        ->action(function ($records) {
                            foreach ($records as $record) {
                                static::getApiService()->updateTextbookSeries($record->id, ['is_active' => true]);
                            }
                            Filament::notify('success', '批量启用成功');
                        }),

                    \Filament\Actions\BulkAction::make('deactivate')
                        ->label('批量停用')
                        ->icon('heroicon-o-x-circle')
                        ->action(function ($records) {
                            foreach ($records as $record) {
                                static::getApiService()->updateTextbookSeries($record->id, ['is_active' => false]);
                            }
                            Filament::notify('success', '批量停用成功');
                        }),
                ]),
            ])
            ->defaultSort('sort_order')
            ->paginated([10, 25, 50, 100])
            ->poll('30s');
    }

    public static function getEloquentQuery(): \Illuminate\Database\Eloquent\builder
    {
        // 直接使用数据库查询
        return parent::getEloquentQuery();
    }

    public static function getRecord(?string $key): ?Model
    {
        // 直接从数据库获取记录
        return app(static::$model)->find($key);
    }

    protected static function newModel(array $data): Model
    {
        // 直接创建记录到数据库
        $model = app(static::$model);
        $model->fill($data);
        $model->save();
        return $model;
    }

    protected static function updateRecord(Model $record, array $data): Model
    {
        // 直接更新数据库记录
        $record->update($data);
        return $record;
    }

    protected static function deleteRecord(Model $record): bool
    {
        // 直接删除数据库记录
        return $record->delete();
    }

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

    public static function canViewAny(): bool
    {
        // 临时允许所有用户查看，等待权限系统完善
        return true;
    }

    public static function getHeaderActions(): array
    {
        return [
            \Filament\Actions\Action::make('import_excel')
                ->label('Excel导入')
                ->icon('heroicon-o-document-arrow-up')
                ->color('success')
                ->url(fn(): string =>
                    route('filament.admin.pages.textbook-excel-import-page')
                ),
        ];
    }

    public static function canCreate(): bool
    {
        // 临时允许所有用户创建，等待权限系统完善
        return true;
    }

    public static function canEdit(Model $record): bool
    {
        // 临时允许所有用户编辑，等待权限系统完善
        return true;
    }

    public static function canDelete(Model $record): bool
    {
        // 临时允许所有用户删除，等待权限系统完善
        return true;
    }

    public static function canDeleteAny(): bool
    {
        // 临时允许所有用户批量删除，等待权限系统完善
        return true;
    }
}