<?php

namespace app\common\service;

use app\common\validate\UploadedFilesValidate;
use app\common\traits\crud\CrudServiceTrait;
use app\common\model\UploadedFiles;
use support\Request;
use support\exception\BusinessException;

class UploadedFilesService
{

    use CrudServiceTrait;

    /**
     * 指定当前要操作的模型
     */
    protected string $modelClass = UploadedFiles::class;

    /**
     * 文件上传分区配置
     */
    protected array $uploadPartitions = [
        'image' => [
            'path' => 'images',
            'max_size' => 5 * 1024 * 1024, // 5MB
            'allowed_types' => ['image/jpeg', 'image/png', 'image/gif', 'image/webp'],
            'extensions' => ['jpg', 'jpeg', 'png', 'gif', 'webp']
        ],
        'document' => [
            'path' => 'documents',
            'max_size' => 10 * 1024 * 1024, // 10MB
            'allowed_types' => ['application/pdf', 'application/msword', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'],
            'extensions' => ['pdf', 'doc', 'docx']
        ],
        'audio' => [
            'path' => 'audios',
            'max_size' => 20 * 1024 * 1024, // 20MB
            'allowed_types' => ['audio/mp3', 'audio/wav', 'audio/ogg'],
            'extensions' => ['mp3', 'wav', 'ogg']
        ],
        'other' => [
            'path' => 'others',
            'max_size' => 5 * 1024 * 1024, // 5MB
            'allowed_types' => [],
            'extensions' => []
        ]
    ];

    /**
     * 记录文件信息到数据库
     * 
     * @param array $fileInfo 文件信息
     * @param Request|null $request 请求对象（可选）
     * @param string $partition 分区名称
     * @param string $category 文件分类
     * @return array
     * @throws BusinessException
     */
    public function recordFileInfo(array $fileInfo, ?Request $request = null, string $partition = 'other', string $category = 'general'): array
    {

        // 验证必需的文件信息
        $requiredFields = ['file_name', 'file_path', 'file_size', 'file_type'];
        foreach ($requiredFields as $field) {
            if (!isset($fileInfo[$field])) {
                throw new BusinessException("缺少必需的文件信息字段: {$field}");
            }
        }

        // 获取文件扩展名
        $fileExtension = pathinfo($fileInfo['file_name'], PATHINFO_EXTENSION);
        
        // 记录到数据库
        $uploadIp = $request ? $request->getRealIp() : '0.0.0.0';
        $userAgent = $request ? $request->header('User-Agent', '') : '';

        $fileData = [
            'file_name' => $fileInfo['file_name'],
            'file_path' => $fileInfo['file_path'],
            'file_size' => $fileInfo['file_size'],
            'file_type' => $fileInfo['file_type'],
            'category' => $category,
            'original_name' => $fileInfo['original_name'] ?? '',
            'extension' => $fileExtension,
            'partition' => $partition,
            'upload_ip' => $uploadIp,
            'user_agent' => $userAgent,
        ];

        $uploadedFile = $this->logicCreate($fileData);

        return [
            'id' => $uploadedFile->id,
            'file_name' => $fileInfo['file_name'],
            'file_path' => $fileInfo['file_path'],
            'file_url' => getenv('MAIN_DOMAIN') . $fileInfo['file_path'],
            'file_size' => $fileInfo['file_size'],
            'file_type' => $fileInfo['file_type'],
            'category' => $category,
            'partition' => $partition,
            'original_name' => $fileInfo['original_name'] ?? '',
            'extension' => $fileExtension,
        ];
    }

    /**
     * 获取文件信息
     * 
     * @param int $fileId
     * @return array|null
     */
    public function getFileInfo(int $fileId): ?array
    {
        $file = $this->logicShow(['where' => ['id' => $fileId]]);
        
        if (!$file) {
            return null;
        }

        return [
            'id' => $file->id,
            'file_name' => $file->file_name,
            'file_path' => $file->file_path,
            'file_url' => getenv('MAIN_DOMAIN') . $file->file_path,
            'file_size' => $file->file_size,
            'file_type' => $file->file_type,
            'category' => $file->category,
            'partition' => $file->partition ?? 'other',
            'original_name' => $file->original_name ?? '',
            'extension' => $file->extension ?? '',
            'created_at' => $file->created_at,
        ];
    }

    /**
     * 获取文件
     *
     * @param string $path
     * @return bool|\Illuminate\Database\Eloquent\Model
     */
    public function getFile(array $where)
    {
        $config['model'] = $this->modelClass;
        $config['where'] = $where;
        $file = $this->logicShow($config);
        
        if (!$file) {
            return false;
        }

        return $file;
    }
    /**
     * 获取文件
     *
     * @param string $path
     * @return bool|\Illuminate\Database\Eloquent\Model
     */
    public function findFile(array $where)
    {
        $file = UploadedFiles::where(['file_path' => $where['file_path']]);

        if (!$file) {
            return false;
        }

        return $file;
    }

    /**
     * 删除文件
     *
     * @param int $fileId
     * @return bool
     */
    public function deleteFile(int $fileId): bool
    {
        $config['model'] = $this->modelClass;
        $config['where'] = ['id' => $fileId];
        $file = $this->logicShow($config);

        if (!$file) {
            return false;
        }

        // 删除数据库记录
        $config =[
            'model' => $this->modelClass,
            'where' => ['id' => $fileId],
            ];
        return $this->logicDeleteBy($config);
    }

    /**
     * 获取分区配置
     * 
     * @return array
     */
    public function getPartitionConfig(): array
    {
        return $this->uploadPartitions;
    }

    /**
     * 生成文件名
     * 
     * @param $file
     * @return string
     */
    protected function generateFileName($file): string
    {
        $extension = $file->getUploadExtension();
        $timestamp = time();
        $random = substr(md5(uniqid()), 0, 8);
        
        return $timestamp . '_' . $random . '.' . $extension;
    }

    /**
     * 格式化文件大小
     * 
     * @param int $bytes
     * @return string
     */
    protected function formatFileSize(int $bytes): string
    {
        $units = ['B', 'KB', 'MB', 'GB'];
        $bytes = max($bytes, 0);
        $pow = floor(($bytes ? log($bytes) : 0) / log(1024));
        $pow = min($pow, count($units) - 1);
        
        $bytes /= pow(1024, $pow);
        
        return round($bytes, 2) . ' ' . $units[$pow];
    }
}