<?php

namespace App\Filament\Resources;

use App\Filament\Resources\SourcePaperResource\Pages;
use App\Filament\Resources\SourcePaperResource\RelationManagers\PaperPartsRelationManager;
use App\Filament\Resources\SourcePaperResource\RelationManagers\PreQuestionCandidatesRelationManager;
use App\Models\SourcePaper;
use Filament\Forms;
use Filament\Resources\Resource;
use Filament\Schemas\Schema;
use Filament\Tables;
use Filament\Tables\Table;
use Filament\Actions\ViewAction;
use Illuminate\Database\Eloquent\Model;
use BackedEnum;
use UnitEnum;
use Filament\Tables\Enums\FiltersLayout;
use Filament\Tables\Filters\SelectFilter;
use Filament\Tables\Filters\Filter;
use Filament\Forms\Components\TextInput;
use Illuminate\Database\Eloquent\Builder;

class SourcePaperResource extends Resource
{
    protected static ?string $model = SourcePaper::class;

    protected static bool $shouldRegisterNavigation = false;

    protected static BackedEnum|string|null $navigationIcon = 'heroicon-o-document-text';

    protected static UnitEnum|string|null $navigationGroup = '卷子导入流程';

    protected static ?string $navigationLabel = '源卷子列表';

    protected static ?int $navigationSort = 3;

    public static function canCreate(): bool
    {
        return false;
    }

    public static function canEdit(Model $record): bool
    {
        return false;
    }

    public static function form(Schema $schema): Schema
    {
        return $schema->schema([
            Forms\Components\TextInput::make('title')->label('标题')->disabled(),
            Forms\Components\TextInput::make('full_title')->label('完整标题')->disabled(),
            Forms\Components\TextInput::make('chapter')->label('章节')->disabled(),
            Forms\Components\TextInput::make('grade')->label('年级')->disabled(),
            Forms\Components\TextInput::make('term')->label('学期')->disabled(),
            Forms\Components\Textarea::make('raw_markdown')
                ->label('卷子原始 Markdown')
                ->rows(12)
                ->disabled(),
        ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('order')->label('顺序')->sortable(),
                Tables\Columns\TextColumn::make('title')->label('卷标题')->searchable(),
                Tables\Columns\TextColumn::make('file.original_filename')->label('来源文件')->toggleable(),
                Tables\Columns\TextColumn::make('grade')->label('年级'),
                Tables\Columns\TextColumn::make('term')->label('学期'),
                Tables\Columns\TextColumn::make('source_type')->label('类型'),
                Tables\Columns\TextColumn::make('parts_sum_question_count')
                    ->label('题量')
                    ->getStateUsing(fn (Model $record) => $record->parts_sum_question_count ?? 0)
                    ->sortable(),
                Tables\Columns\TextColumn::make('parts_count')
                    ->label('区块数')
                    ->getStateUsing(fn (Model $record) => $record->parts_count ?? 0)
                    ->sortable(),
            ])
            ->filters([
                SelectFilter::make('grade')
                    ->label('年级')
                    ->options(collect(range(1, 12))->mapWithKeys(fn ($grade) => [$grade => "{$grade}年级"])->all()),
                SelectFilter::make('term')
                    ->label('学期')
                    ->options([
                        '上学期' => '上学期',
                        '下学期' => '下学期',
                    ]),
                SelectFilter::make('source_type')
                    ->label('来源类型')
                    ->options([
                        'textbook' => '教材',
                        'exam' => '考试',
                        'other' => '其他',
                    ]),
                Filter::make('question_range')
                    ->label('题量范围')
                    ->form([
                        TextInput::make('min')->placeholder('最小题量')->numeric(),
                        TextInput::make('max')->placeholder('最大题量')->numeric(),
                    ])
                    ->query(function (Builder $query, array $data) {
                        $min = $data['min'] ?? null;
                        $max = $data['max'] ?? null;

                        if ($min !== null && $min !== '') {
                            $query->having('parts_sum_question_count', '>=', (int) $min);
                        }
                        if ($max !== null && $max !== '') {
                            $query->having('parts_sum_question_count', '<=', (int) $max);
                        }
                    }),
            ], layout: FiltersLayout::AboveContentCollapsible)
            ->actions([
                ViewAction::make()
                    ->icon('heroicon-o-eye')
                    ->iconButton()
                    ->tooltip('查看详情'),
            ])
            ->recordUrl(fn (Model $record): string => route('filament.admin.resources.source-papers.view', $record));
    }

    public static function getRelations(): array
    {
        return [
            PaperPartsRelationManager::class,
            PreQuestionCandidatesRelationManager::class,
        ];
    }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListSourcePapers::route('/'),
            'view' => Pages\ViewSourcePaper::route('/{record}'),
        ];
    }

    public static function getEloquentQuery(): Builder
    {
        return parent::getEloquentQuery()
            ->with(['file'])
            ->withCount(['parts', 'candidates'])
            ->withSum('parts', 'question_count');
    }
}