const install = (Vue, vm) => {
	// 是否正在刷新的标记
	let isRefreshing = false
	// 重试队列，每一项将是一个待执行的函数形式
	let requests = []
	
	// 请求拦截器
	uni.$u.http.interceptors.request.use((config) => {
		uni.showLoading({
			title: '加载中',
			mask: true
		});
		const cookies = vm.$store.state.cookies || ''
		if (cookies) {
			config.header['doumee-auth-token'] = cookies;
		}
		return config
	}, config => {
		return Promise.reject(config)
	})
	
	// 响应拦截器
	uni.$u.http.interceptors.response.use((response) => {
		uni.hideLoading();
		// 登录过期
		if (response.data.code === 401 && vm.$store.state.cookies) {
			if (!isRefreshing) {	// 是否已经执行刷新
				isRefreshing = true
				uni.login({
					provider: 'weixin',
					success: async function (loginRes) {
						let { code } = loginRes;
						uni.request({
							url: vm.$baseUrl + 'system/loginByWxMini',
							method: "POST",
							data: { code },
							success: (res) => {
								isRefreshing = false
								if (res.data.data) {
									vm.$store.commit('setCookies', res.data.data)
									vm.$u.api.getUserInfo()
										.then(user => {
											vm.$store.commit('setUserInfo', user.data)
										})
									// 已经刷新了token，将所有队列中的请求进行重试
									requests.forEach(item => item(res.data.data))
									requests = []
								} else {
									uni.navigateTo({
										url: '/pages/login/login'
									})
								}
							}
						});
					}
				});
			}
			return new Promise((resolve) => {
				// 将resolve放进队列，用一个函数形式来保存，等token刷新后直接执行
				requests.push(token => {
					response.config.header['doumee-auth-token'] = token
					resolve(uni.$u.http.request(response.config));
				})
			})
		} else if (response.data.code === 401 && !vm.$store.state.cookies) {
			uni.navigateTo({
				url: '/pages/login/login'
			})
		}
		if (response.data.code !== 200) {
			uni.showToast({
				title: response.data.message,
				icon: "none",
				duration: 2000
			});
		}
		return response.data;
	}, (response) => {
		uni.hideLoading();
		return Promise.reject(response)
	})
}

export default { install }