import axios from 'axios'
import { Notification, MessageBox, Loading } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/tiegu'
import { saveAs } from 'file-saver'

let downloadLoadingInstance

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
	// axios中请求配置有baseURL选项，表示请求URL公共部分
	baseURL: process.env.VUE_APP_BASE_API,
	// 超时
	timeout: 10000
})

// request拦截器
service.interceptors.request.use(
	(config) => {
		// 是否需要设置 token
		const isToken = (config.headers || {}).isToken === false
		if (getToken() && !isToken) {
			config.headers['Authorization'] = 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
		}
		// get请求映射params参数
		if (config.method === 'get' && config.params) {
			let url = config.url + '?' + tansParams(config.params)
			url = url.slice(0, -1)
			config.params = {}
			config.url = url
		}
		return config
	},
	(error) => {
		console.log(error)
		Promise.reject(error)
	}
)

// 响应拦截器
service.interceptors.response.use(
	(res) => {
		// 未设置状态码则默认成功状态
		const code = res.data.code || 200
		// 获取错误信息
		const msg = errorCode[code] || res.data.msg || errorCode['default']
		// 二进制数据则直接返回
		if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
			return res.data
		}
		if (code === 401) {
			MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
				confirmButtonText: '重新登录',
				cancelButtonText: '取消',
				type: 'warning'
			})
				.then(() => {
					store.dispatch('LogOut').then(() => {
						location.href = '/index'
					})
				})
				.catch(() => {})
			return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
		} else if (code === 500) {
			Message({
				message: msg,
				type: 'error'
			})
			return Promise.reject(new Error(msg))
		} else if (code !== 200) {
			Notification.error({
				title: msg
			})
			return Promise.reject('error')
		} else {
			return res.data
		}
	},
	(error) => {
		console.log('err' + 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'
		}
		Message({
			message: message,
			type: 'error',
			duration: 5 * 1000
		})
		return Promise.reject(error)
	}
)

function notif(msg) {
	Notification({
		message: msg,
		type: 'error',
		duration: 3000,
		customClass: 'elemsg-notify'
	})
}
function tansParams(params) {
	let result = ''
	for (const propName of Object.keys(params)) {
		const value = params[propName]
		var part = encodeURIComponent(propName) + '='
		if (value !== null && typeof value !== 'undefined') {
			if (typeof value === 'object') {
				for (const key of Object.keys(value)) {
					if (value[key] !== null && typeof value[key] !== 'undefined') {
						let params = propName + '[' + key + ']'
						var subPart = encodeURIComponent(params) + '='
						result += subPart + encodeURIComponent(value[key]) + '&'
					}
				}
			],
			headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
			responseType: 'blob'
		})
		.then(async (data) => {
			const isLogin = await blobValidate(data)
			if (isLogin) {
				const blob = new Blob([data])
				saveAs(blob, filename)
			} else {
				const resText = await data.text()
				const rspObj = JSON.parse(resText)
				const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
				Message.error(errMsg)
			}
			downloadLoadingInstance.close()
		})
		.catch((r) => {
			console.error(r)
			Message.error('下载文件出现错误，请联系管理员！')
			downloadLoadingInstance.close()
		})
}

export default service