import { decryptWithSM4 } from './sm'

const generateRandomString = (length) => {
  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
  return Array.from({ length }, () => chars.charAt(Math.floor(Math.random() * chars.length))).join('')
}

export const uploadImgSignUrl = (file) => {
  return new Promise((resolve, reject) => {
    uni.request({
      url: '/file/uploadBase64',
      method: 'POST',
      data: {
        base64File: file,
        fileName: `${generateRandomString(10)}_${Date.now()}.png`,
        fileType: 'image/png',
      },
      success: (uploadRes) => {
        try {
          let result
          if (typeof uploadRes.data === 'string') {
            result = JSON.parse(decryptWithSM4(uploadRes.data))
          } else {
            result = uploadRes.data
          }

          if (result.code === 200) {
            uni.showToast({ title: '上传成功', icon: 'none' })
            resolve({
              name: result.data.name,
              url: result.data.url,
            })
          } else {
            uni.showToast({ title: '上传失败', icon: 'none' })
            reject(new Error(result.message || '上传失败'))
          }
        } catch (e) {
          console.error('处理返回数据出错', e)
          uni.showToast({ title: '上传失败', icon: 'none' })
          reject(e)
        }
      },
      fail: (err) => {
        console.error('上传失败', err)
        uni.showToast({ title: '上传失败', icon: 'none' })
        reject(err)
      },
    })
  })
}

export const formatDiff = (...nums) => {
  let result = nums.reduce((acc, cur) => acc - cur)

  if (Number.isInteger(result)) {
    return result // 整数直接返回
  } else {
    // 保留 3 位小数，但去掉多余的 0
    return parseFloat(result.toFixed(3))
  }
}