import store from "../store";
import Cache from '../utils/cache';
import { Debounce } from '@/utils/validate.js'
// #ifdef H5
import { isWeixin } from "../utils";
import auth from './wechat';
// #endif

import { LOGIN_STATUS, USER_INFO, EXPIRES_TIME, STATE_R_KEY, BACK_URL} from './../config/cache';

const LOGIN_PAGE_ROUTE = 'pages/users/login/index';
const WECHAT_LOGIN_PAGE_ROUTE = 'pages/users/wechat_login/index';

function normalizeRoute(route) {
	return (route || '').replace(/^\//, '');
}

function getPrevPageRoute() {
	const pages = getCurrentPages();
	if (pages.length < 2) {
		return '';
	}
	return normalizeRoute(pages[pages.length - 2].route);
}

/**
 * 登录页 ⇄ 微信登录页切换：上一页已是目标页则返回，避免反复 navigateTo 堆栈
 */
export function switchLoginPage(url) {
	const targetRoute = normalizeRoute((url || '').split('?')[0].replace(/^\//, ''));
	const prevRoute = getPrevPageRoute();
	if (prevRoute && prevRoute === targetRoute && url.indexOf('?') === -1) {
		uni.navigateBack();
		return;
	}
	uni.navigateTo({ url });
}

/**
 * 微信授权后进入账号绑定页（replace 当前页，避免栈里叠多层登录相关页面）
 */
export function openLoginBindPage(authKey) {
	const url = `/pages/users/login/index?bindWechat=1&authKey=${encodeURIComponent(authKey)}`;
	const prevRoute = getPrevPageRoute();
	if (prevRoute === LOGIN_PAGE_ROUTE) {
		uni.redirectTo({ url });
		return;
	}
	uni.redirectTo({ url });
}

function prePage(){
	let pages = getCurrentPages();
	let prePage = pages[pages.length - 1];
	return prePage.route;
}

export const toLogin = Debounce(_toLogin,800)

export function _toLogin(push, pathLogin) {
	
	store.commit("LOGOUT");
	let path = prePage();
	let login_back_url = Cache.get(BACK_URL);
	
	// #ifdef APP
		uni.navigateTo({
			url: '/pages/users/login/index'
		})
		return
	// #endif
	
	
	// #ifdef H5
	// path = location.href;
	path = location.pathname + location.search;
	// #endif
	if(!pathLogin){
		pathLogin = '/page/users/login/index'
		Cache.set('login_back_url',path);
	}

	if (['pages/user/index','/pages/user/index'].indexOf(login_back_url) == -1) {
		// #ifdef H5
		if (isWeixin()) {
			let urlData = location.pathname + location.search
			if (urlData.indexOf('?') !== -1) {
				urlData += '&go_longin=1';
			} else {
				urlData += '?go_longin=1';
			}
			if (!Cache.has('snsapiKey')) {
				auth.oAuth('snsapi_base', urlData);
			} else {
				uni.navigateTo({
					url: '/pages/users/wechat_login/index'
				})
			}
		} else {
			uni.navigateTo({
				url: '/pages/users/login/index'
			})
		}
		// #endif

		// #ifdef MP
		uni.navigateTo({
			url: '/pages/users/wechat_login/index'
		})
		// #endif
	}
}


export function checkLogin()
{
	let token = Cache.get(LOGIN_STATUS);
	let expiresTime = Cache.get(EXPIRES_TIME);
	let newTime = Math.round(new Date() / 1000);
	if (expiresTime < newTime || !token){
		Cache.clear(LOGIN_STATUS);
		Cache.clear(EXPIRES_TIME);
		Cache.clear(USER_INFO);
		Cache.clear(STATE_R_KEY);
		return false;
	}else{
		store.commit('UPDATE_LOGIN',token);
		let userInfo = Cache.get(USER_INFO,true);
		if(userInfo){
			store.commit('UPDATE_USERINFO',userInfo);
		}
		return true;
	}

}