<?php

namespace App\Filament\Resources\TextbookResource\Schemas;

use App\Filament\Resources\TextbookResource;
use App\Services\TextbookApiService;
use Filament\Forms\Components\FileUpload;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\Section;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Textarea;
use Filament\Schemas\Schema;

class TextbookFormSchema
{
    public static function make(Schema $schema): Schema
    {
        return $schema
            ->schema([
                Section::make('基本信息')
                    ->schema([
                        Select::make('series_id')
                            ->label('教材系列')
                            ->options(function () {
                                $series = app(TextbookApiService::class)->getTextbookSeries();
                                $options = [];
                                foreach ($series['data'] as $s) {
                                    $displayName = $s['name'];
                                    if (!empty($s['publisher'])) {
                                        $displayName .= ' (' . $s['publisher'] . ')';
                                    }
                                    $options[$s['id']] = $displayName;
                                }
                                return $options;
                            })
                            ->required()
                            ->searchable()
                            ->preload(),
                        TextInput::make('official_title')
                            ->label('教材名称')
                            ->maxLength(512)
                            ->helperText('教材名称（用户输入）'),
                        TextInput::make('isbn')
                            ->label('ISBN')
                            ->maxLength(20),
                        Textarea::make('aliases')
                            ->label('别名')
                            ->helperText('JSON 格式，如：["别名1", "别名2"]')
                            ->formatStateUsing(fn ($state) => is_array($state) ? json_encode($state, JSON_UNESCAPED_UNICODE) : $state)
                            ->dehydrateStateUsing(fn ($state) => is_string($state) ? json_decode($state, true) : $state)
                            ->columnSpanFull(),
                    ])
                    ->columns(2),

                Section::make('学段/年级/学期')
                    ->schema([
                        Select::make('stage')
                            ->label('学段')
                            ->options([
                                'primary' => '小学',
                                'junior' => '初中',
                                'senior' => '高中',
                            ])
                            ->default('junior')
                            ->required()
                            ->reactive(),
                        Select::make('schooling_system')
                            ->label('学制')
                            ->options([
                                '63' => '六三学制',
                                '54' => '五四学制',
                            ])
                            ->default('63')
                            ->visible(fn ($get): bool => in_array($get('stage'), ['primary', 'junior'])),
                        TextInput::make('grade')
                            ->label('年级')
                            ->numeric()
                            ->minValue(1)
                            ->maxValue(12)
                            ->helperText('数字1-12，例：1年级填1'),
                        Select::make('semester')
                            ->label('学期')
                            ->options([
                                1 => '上学期',
                                2 => '下学期',
                            ])
                            ->required(),
                    ])
                    ->columns(2),

                Section::make('版本与系列')
                    ->schema([
                        Select::make('naming_scheme')
                            ->label('命名体系')
                            ->options([
                                'new' => '新体系',
                                'old' => '旧体系',
                            ])
                            ->default('new')
                            ->required(),
                        Select::make('track')
                            ->label('方向')
                            ->options([
                                'science' => '理科',
                                'liberal_arts' => '文科',
                            ])
                            ->visible(fn ($get): bool => $get('stage') === 'senior'),
                        Select::make('module_type')
                            ->label('模块类型')
                            ->options([
                                'compulsory' => '必修',
                                'selective_compulsory' => '选择性必修',
                                'elective' => '选修',
                            ])
                            ->visible(fn ($get): bool => $get('stage') === 'senior'),
                        TextInput::make('volume_no')
                            ->label('册次')
                            ->numeric()
                            ->minValue(1)
                            ->maxValue(3)
                            ->helperText('数字1-3，例：第一册填1'),
                        TextInput::make('legacy_code')
                            ->label('旧版代号')
                            ->helperText('旧教材编号，如：上册-1'),
                        TextInput::make('curriculum_standard_year')
                            ->label('课程标准年份')
                            ->numeric()
                            ->minValue(2000)
                            ->maxValue(2099),
                        TextInput::make('curriculum_revision_year')
                            ->label('课程修订年份')
                            ->numeric()
                            ->minValue(2000)
                            ->maxValue(2099),
                        TextInput::make('approval_authority')
                            ->label('审批机构')
                            ->default('教育部'),
                        TextInput::make('approval_year')
                            ->label('审批年份')
                            ->numeric()
                            ->minValue(2000)
                            ->maxValue(2099),
                        TextInput::make('edition_label')
                            ->label('版本标识')
                            ->helperText('如：第一版、第二版'),
                    ])
                    ->columns(2),

                Section::make('封面上传')
                    ->schema([
                        FileUpload::make('cover_path')
                            ->label('封面图片')
                            ->image()
                            ->directory('textbook-covers'),
                    ]),

                Section::make('发布与排序')
                    ->schema([
                        Select::make('status')
                            ->label('状态')
                            ->options([
                                'draft' => '草稿',
                                'published' => '已发布',
                                'archived' => '已归档',
                            ])
                            ->default('draft')
                            ->required(),
                        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')
                            ->helperText('JSON 格式')
                            ->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(),
                    ])
                    ->columns(2),
            ])
            ->columns(2);
    }
}