import config from '@/config'

/**
 * OSS直传上传功能（无需后端接口）
 * @param {Object} file - 文件对象（uni.chooseImage返回的文件）
 * @returns {Promise<Object>} 返回上传结果
 */
const uploadImage = async (file) => {
  try {
    // 使用项目配置中的OSS信息
    const ossConfig = {
      accessKey: config.aliOSS_accessKey,
      secretKey: config.aliOSS_secretKey,
      bucket: config.aliOSS_bucketName,
      endpoint: config.endpoint,
      staticDomain: config.staticDomain
    }

    // 生成唯一文件名
    const timestamp = Date.now()
    const randomStr = Math.random().toString(36).substring(2, 8)
    const fileExtension = getFileExtension(file.name || file.path || '.jpg')
    const fileName = `avatars/${timestamp}_${randomStr}${fileExtension}`

    // 使用公共读写bucket方案（无需签名）
    const uploadUrl = `https://${ossConfig.bucket}.${ossConfig.endpoint}`
    
    const result = await uni.uploadFile({
      url: uploadUrl,
      filePath: file.path || file.tempFilePath,
      name: 'file',
      formData: {
        'key': fileName
      }
    })

    console.log('OSS上传结果:', result)
    
    // OSS上传成功的状态码通常是204
    if (result.statusCode === 204 || result.statusCode === 200) {
      const fileUrl = `${ossConfig.staticDomain}${fileName}`
      return {
        success: true,
        url: fileUrl,
        fileName: fileName
      }
    } else {
      throw new Error(`OSS上传失败，状态码: ${result.statusCode}`)
    }
  } catch (error) {
    console.error('OSS上传失败:', error)
    return {
      success: false,
      error: error.message || 'OSS上传失败'
    }
  }
}



/**
 * 获取文件扩展名
 */
const getFileExtension = (fileName) => {
  if (!fileName) return '.jpg'
  const lastDot = fileName.lastIndexOf('.')
  return lastDot !== -1 ? fileName.substring(lastDot) : '.jpg'
}

/**
 * 选择并上传图片到OSS（一步到位）
 */
const chooseAndUpload = async () => {
  try {
    // 选择图片
    const chooseResult = await uni.chooseImage({
      count: 1,
      sizeType: ['compressed'],
      sourceType: ['album', 'camera']
    })

    if (chooseResult.tempFilePaths && chooseResult.tempFilePaths.length > 0) {
      const file = {
        path: chooseResult.tempFilePaths[0],
        tempFilePath: chooseResult.tempFilePaths[0]
      }

      // 显示加载提示
      uni.showLoading({ title: '上传到OSS中...' })

      // 上传文件到OSS
      const uploadResult = await uploadImage(file)
      
      uni.hideLoading()

      if (uploadResult.success) {
        uni.showToast({ title: 'OSS上传成功', icon: 'success' })
        return uploadResult
      } else {
        uni.showToast({ title: uploadResult.error, icon: 'error' })
        return null
      }
    }
  } catch (error) {
    uni.hideLoading()
    uni.showToast({ title: 'OSS上传失败', icon: 'error' })
    console.error('OSS上传失败:', error)
    return null
  }
}

export {
  uploadImage,
  chooseAndUpload,
  getFileExtension
}