const { APP_API_BASE_URL, WECHAT_APP_ID } = require('../config/env.js')

const TOKEN_KEY = 'qipai_access_token'

function request(path, options = {}) {
  return new Promise((resolve, reject) => {
    const token = wx.getStorageSync(TOKEN_KEY)
    wx.request({
      url: `${APP_API_BASE_URL}${path}`,
      method: options.method || 'GET',
      data: options.data,
      header: {
        'x-wechat-appid': WECHAT_APP_ID,
        ...(token ? { authorization: `Bearer ${token}` } : {}),
        ...(options.headers || {}),
      },
      success(response) {
        if (response.statusCode >= 200 && response.statusCode < 300) {
          resolve(response.data)
          return
        }
        reject(new Error(response.data?.message || `请求失败：${response.statusCode}`))
      },
      fail: reject,
    })
  })
}

function uploadImage(path, filePath, headers = {}) {
  return new Promise((resolve, reject) => {
    const token = wx.getStorageSync(TOKEN_KEY)
    wx.getFileSystemManager().readFile({
      filePath,
      success(result) {
        wx.request({
          url: `${APP_API_BASE_URL}${path}`,
          method: 'POST',
          data: result.data,
          header: {
            'x-wechat-appid': WECHAT_APP_ID,
            'x-file-name': filePath.split('/').pop() || `cleaning-${Date.now()}.jpg`,
            'x-image-content-type': guessImageType(filePath),
            'content-type': 'application/octet-stream',
            ...(token ? { authorization: `Bearer ${token}` } : {}),
            ...(headers || {}),
          },
          success(response) {
            if (response.statusCode >= 200 && response.statusCode < 300) {
              try {
                resolve(typeof response.data === 'string' ? JSON.parse(response.data) : response.data)
              } catch (error) {
                reject(error)
              }
              return
            }
            reject(new Error(response.data?.message || `上传失败：${response.statusCode}`))
          },
          fail: reject,
        })
      },
      fail: reject,
    })
  })
}

function login() {
  return new Promise((resolve, reject) => {
    wx.login({
      success: async ({ code }) => {
        try {
          const response = await request('/auth/wechat-login', {
            method: 'POST',
            data: { code },
          })
          wx.setStorageSync(TOKEN_KEY, response.data.accessToken)
          resolve(response.data)
        } catch (error) {
          reject(error)
        }
      },
      fail: reject,
    })
  })
}

function ensureLogin() {
  const token = wx.getStorageSync(TOKEN_KEY)
  if (token) return Promise.resolve({ accessToken: token })
  return login()
}

function clearSession() {
  wx.removeStorageSync(TOKEN_KEY)
}

function cents(value) {
  return `￥${((Number(value || 0)) / 100).toFixed(2)}`
}

function clientRequestId(prefix) {
  return `${prefix}-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`
}

function requestWechatPayment(params) {
  return new Promise((resolve, reject) => {
    if (!params || !params.timeStamp || !params.nonceStr || !params.package || !params.paySign) {
      reject(new Error('微信支付参数不完整'))
      return
    }
    wx.requestPayment({
      timeStamp: String(params.timeStamp),
      nonceStr: params.nonceStr,
      package: params.package,
      signType: params.signType || 'RSA',
      paySign: params.paySign,
      success: resolve,
      fail: reject,
    })
  })
}

function guessImageType(filePath) {
  const lower = String(filePath || '').toLowerCase()
  if (lower.endsWith('.png')) return 'image/png'
  if (lower.endsWith('.webp')) return 'image/webp'
  return 'image/jpeg'
}

module.exports = {
  request,
  uploadImage,
  login,
  ensureLogin,
  clearSession,
  cents,
  clientRequestId,
  requestWechatPayment,
}