<?php

namespace App\Filament\Resources\TextbookResource\Pages;

use App\Filament\Resources\TextbookResource;
use App\Services\TextbookApiService;
use Filament\Forms;
use Filament\Actions;
use Filament\Schemas\Components\Section;
use Filament\Resources\Pages\Page;
use Throwable;

class EditTextbook extends Page implements Forms\Contracts\HasForms
{
    use Forms\Concerns\InteractsWithForms;

    protected static string $resource = TextbookResource::class;

    public array $data = [];

    public ?int $recordId = null;

    public function mount(int|string $record): void
    {
        $this->recordId = (int) $record;

        if ($this->recordId <= 0) {
            abort(404);
        }

        // 从API获取教材数据
        $apiService = app(TextbookApiService::class);
        $textbookData = $apiService->getTextbook($this->recordId);

        if (!$textbookData) {
            abort(404);
        }

        $this->data = $textbookData;
        $this->form->fill($this->data);
    }

    public function save(): void
    {
        // 必须用 form->getState()：会触发临时文件落盘/春笋 URL、再执行 dehydrateStateUsing 得到逗号串。
        // 直接读 $this->data 会跳过上述步骤，导致「保存无效」且新图不会上传。
        $data = $this->form->getState();

        $allowedFields = [
            'series_id', 'stage', 'grade', 'semester', 'naming_scheme',
            'track', 'module_type', 'volume_no', 'legacy_code',
            'curriculum_standard_year', 'curriculum_revision_year',
            'approval_authority', 'approval_year', 'edition_label',
            'official_title', 'aliases', 'isbn',
            'status', 'sort_order', 'meta',
        ];

        $updateData = [];
        foreach ($allowedFields as $field) {
            if (! array_key_exists($field, $data)) {
                continue;
            }
            $value = $data[$field];
            if (is_array($value) || is_object($value)) {
                continue;
            }
            $updateData[$field] = $value;
        }

        try {
            $apiService = app(TextbookApiService::class);
            $response = $apiService->updateTextbook($this->recordId, $updateData);
        } catch (Throwable $e) {
            \Filament\Notifications\Notification::make()
                ->title('保存失败')
                ->body($e->getMessage())
                ->danger()
                ->send();

            return;
        }

        $row = $response['data'] ?? $response;
        if (! is_array($row)) {
            $row = [];
        }

        $this->data = array_merge($this->data, $row);
        $this->form->fill($this->data);

        \Filament\Notifications\Notification::make()
            ->title('教材更新成功')
            ->success()
            ->send();
    }

    protected function getHeaderActions(): array
    {
        return [
            Actions\Action::make('covers')
                ->label('管理配图')
                ->icon('heroicon-o-photo')
                ->url(fn (): string => static::$resource::getUrl('covers', ['record' => $this->recordId])),
            Actions\Action::make('back')
                ->label('返回列表')
                ->url(static::$resource::getUrl('index'))
                ->color('gray'),
        ];
    }

    public function getTitle(): string
    {
        return '编辑教材';
    }

    public function getView(): string
    {
        return 'filament.resources.textbook-resource.edit';
    }

    public function form(\Filament\Schemas\Schema $schema): \Filament\Schemas\Schema
    {
        return $schema
            ->schema([
                Section::make('基本信息')
                    ->schema([
                        Forms\Components\Select::make('series_id')
                            ->label('教材系列')
                            ->options(function () {
                                $apiService = app(TextbookApiService::class);
                                $series = $apiService->getTextbookSeries();
                                $options = [];
                                foreach ($series['data'] as $s) {
                                    $options[$s['id']] = $s['name'] ?? '未命名系列';
                                }
                                return $options;
                            })
                            ->required()
                            ->searchable(),

                        Forms\Components\Select::make('stage')
                            ->label('学段')
                            ->options([
                                'primary' => '小学',
                                'junior' => '初中',
                                'senior' => '高中',
                            ])
                            ->required()
                            ->reactive(),

                        Forms\Components\TextInput::make('grade')
                            ->label('年级')
                            ->numeric()
                            ->helperText('例如：7表示七年级'),

                        Forms\Components\Select::make('semester')
                            ->label('学期')
                            ->options([
                                1 => '上学期',
                                2 => '下学期',
                            ])
                            ->helperText('选择学期'),

                        Forms\Components\TextInput::make('official_title')
                            ->label('教材名称')
                            ->required()
                            ->maxLength(255),

                        Forms\Components\TextInput::make('isbn')
                            ->label('ISBN')
                            ->maxLength(255),

                        Forms\Components\Select::make('status')
                            ->label('状态')
                            ->options([
                                'draft' => '草稿',
                                'published' => '已发布',
                                'archived' => '已归档',
                            ])
                            ->required(),
                    ])
                    ->columns(2),
            ])
            ->statePath('data');
    }
}