<?php

namespace App\Filament\Pages\TextbookImport;

use App\Services\Import\TextbookExcelImporter;
use App\Services\TextbookApiService;
use PhpOffice\PhpSpreadsheet\IOFactory;
use Filament\Pages\Page;
use UnitEnum;
use BackedEnum;
use Filament\Actions\Action;
use Filament\Forms;
use Filament\Forms\Components\FileUpload;
use Filament\Notifications\Notification;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\Log;
use Livewire\WithFileUploads;
use Livewire\Component;
use Livewire\Attributes\Validate;

class TextbookExcelImportPage extends Page
{
    use WithFileUploads;

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

    protected static ?string $navigationLabel = 'Excel导入';

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

    protected static ?int $navigationSort = 4;

    public string $view = 'filament.pages.textbook-import';

    #[Validate('required|string')]
    public $selectedType = 'textbook_series';

    #[Validate('required|file|mimes:xlsx,xls|max:10240')]
    public $file;

    public $importResult = null;

    protected $importer;
    protected $apiService;

    public function boot()
    {
        $this->importer = app(TextbookExcelImporter::class);
        $this->apiService = app(TextbookApiService::class);
    }

    public function mount()
    {
        $this->importer = app(TextbookExcelImporter::class);
        $this->apiService = app(TextbookApiService::class);

        // 检查URL参数，设置默认导入类型
        $type = request()->get('type');
        if (in_array($type, ['textbook_series', 'textbook', 'textbook_catalog'])) {
            $this->selectedType = $type;
        }
    }

    public function getHeaderActions(): array
    {
        return [
            Action::make('downloadTemplate')
                ->label('下载模板')
                ->icon('heroicon-o-arrow-down-tray')
                ->color('primary')
                ->action('downloadTemplate'),

            Action::make('import')
                ->label('导入数据')
                ->icon('heroicon-o-cloud-arrow-up')
                ->color('success')
                ->action('importData')
                ->requiresConfirmation()
                ->modalHeading('确认导入')
                ->modalDescription('确定要导入Excel文件中的数据吗？此操作将同步到题库服务。')
                ->modalSubmitActionLabel('确认导入'),
        ];
    }

    public function downloadTemplate()
    {
        try {
            $importer = app(TextbookExcelImporter::class);

            if ($this->selectedType === 'textbook_series') {
                $filePath = $importer->generateTextbookSeriesTemplate();
                $fileName = '教材系列导入模板.xlsx';
            } elseif ($this->selectedType === 'textbook') {
                $filePath = $importer->generateTextbookTemplate();
                $fileName = '教材导入模板.xlsx';
            } else {
                $filePath = $importer->generateTextbookCatalogTemplate();
                $fileName = '教材目录导入模板.xlsx';
            }

            return response()->download($filePath, $fileName)->deleteFileAfterSend();
        } catch (\Exception $e) {
            Notification::make()
                ->title('模板生成失败')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    public function importData()
    {
        $this->validate();

        $temporaryPath = null;
        $finalPath = null;

        try {
            $importer = app(TextbookExcelImporter::class);

            // 获取文件的临时路径（Livewire 上传的文件会有临时路径）
            $temporaryPath = $this->file->getRealPath();

            if (!$temporaryPath || !file_exists($temporaryPath)) {
                throw new \Exception('文件上传失败，请重新上传');
            }

            // 检查文件是否可读
            if (!is_readable($temporaryPath)) {
                throw new \Exception('文件不可读，请检查文件权限');
            }

            // 调试信息
            Log::info('文件上传信息', [
                'original_name' => $this->file->getClientOriginalName(),
                'temporary_path' => $temporaryPath,
                'exists' => file_exists($temporaryPath),
                'is_file' => is_file($temporaryPath),
                'readable' => is_readable($temporaryPath),
                'file_size' => filesize($temporaryPath),
                'mime_type' => $this->file->getMimeType(),
            ]);

            // 执行导入 - 直接使用临时路径
            if ($this->selectedType === 'textbook_series') {
                $result = $importer->importTextbookSeries($temporaryPath);
            } elseif ($this->selectedType === 'textbook') {
                $result = $importer->importTextbook($temporaryPath);
            } else {
                // 教材目录导入 - 需要从Excel中获取textbook_id
                $spreadsheet = IOFactory::load($temporaryPath);
                $sheet = $spreadsheet->getActiveSheet();
                $data = $sheet->toArray();

                $header = $data[0] ?? [];
                $textbookIdIndex = 0;
                $seriesIdIndex = null;
                foreach ($header as $index => $label) {
                    $label = trim((string) $label);
                    if ($label !== '' && str_contains($label, '教材ID')) {
                        $textbookIdIndex = $index;
                    }
                    if ($label !== '' && str_contains($label, '系列ID')) {
                        $seriesIdIndex = $index;
                    }
                }

                $textbookId = 0;
                $seriesId = null;
                foreach (array_slice($data, 1) as $row) {
                    $candidate = (int) ($row[$textbookIdIndex] ?? 0);
                    if ($candidate > 0) {
                        $textbookId = $candidate;
                        break;
                    }
                }
                if ($seriesIdIndex !== null) {
                    foreach (array_slice($data, 1) as $row) {
                        $candidate = (int) ($row[$seriesIdIndex] ?? 0);
                        if ($candidate > 0) {
                            $seriesId = $candidate;
                            break;
                        }
                    }
                }

                if ($textbookId <= 0) {
                    throw new \Exception('Excel文件中未找到有效的教材ID，请确保第一列包含教材ID');
                }

                $result = $importer->importTextbookCatalog($temporaryPath, $textbookId, $seriesId);
            }

            $this->importResult = $result;

            if ($result['success']) {
                $message = sprintf(
                    '导入完成！成功: %d 条，失败: %d 条',
                    $result['success_count'],
                    $result['error_count']
                );

                Notification::make()
                    ->title('导入成功')
                    ->body($message)
                    ->success()
                    ->send();
            } else {
                Notification::make()
                    ->title('导入失败')
                    ->body($result['message'])
                    ->danger()
                    ->send();
            }

        } catch (\Exception $e) {
            Notification::make()
                ->title('导入失败')
                ->body($e->getMessage())
                ->danger()
                ->send();

            Log::error('Excel导入失败', [
                'error' => $e->getMessage(),
                'temporary_path' => $temporaryPath,
                'final_path' => $finalPath,
                'trace' => $e->getTraceAsString(),
            ]);
        }
        // 不需要手动删除文件，临时文件会在请求结束后自动清理
    }
}