import store from '@/store'
import config from '@/config'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { toast, showConfirm, tansParams } from '@/utils/common'
import {isEmpty} from "@/utils/index";

let timeout = 10000
const baseUrl = config.baseUrl

const request = config => {
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  config.header = config.header || {}
  if (getToken() && !isToken) {
    config.header['Authorization'] = 'Bearer ' + getToken()
  }
  // get请求映射params参数
  if (config.params) {
    let url = config.url + '?' + tansParams(config.params)
    url = url.slice(0, -1)
    config.url = url
  }
  return new Promise((resolve, reject) => {
    doRequest(resolve, reject, config);
  })
}

function doRequest(resolve, reject, config) {
  uni.request({
    method: config.method || 'get',
    timeout: config.timeout ||  timeout,
    url: config.baseUrl || baseUrl + config.url,
    data: config.data,
    header: config.header,
    dataType: 'json'
  }).then(response => {
    let [error, res] = response
    if (error) {
      toast('后端接口连接异常')
      reject('后端接口连接异常')
      return
    }
    const code = res.data.code || 200
    const msg = errorCode[code] || res.data.msg || errorCode['default']

    // 若没有登录，则自动登录，然后重新发请求
    if (code === 401) {
      // 尝试静默登录
      store.dispatch("WxLogin").then(loginRes => {
        // 重新设置token
        config.header['Authorization'] = 'Bearer ' + getToken();
        doRequest(resolve, reject, config);
      }).catch(() => {
        onNoAuth(resolve, reject);
      })
      return;
    }

    if (code === 500) {
      toast(msg)
      reject('500')
    } else if (code !== 200) {
      toast(msg)
      reject(code)
    }

    resolve(res.data)
  }).catch(error => {
    let { message } = error
    if (message === 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    toast(message)
    reject(error)
  })
}

// 无权限操作
function onNoAuth(resolve, reject) {
  showConfirm('登录状态已过期，您可以继续留在该页面，或者重新登录?').then(res => {
    if (res.confirm) {
      store.dispatch('LogOut').then(res => {
        uni.reLaunch({ url: '/pages/login' })
      })
    }
  })
  reject('无效的会话，或者会话已过期，请重新登录。')
}

export default request