const langList = ['zh-cn', 'en-us'];

var locale = uni.getStorageSync('lang') || "zh-cn"; //设置语言

export default {
	langList: ['zh-cn', 'en-us'],
	/**
	 * * 解析多语言
	 * @param {Object} field
	 */
	lang(field) {
		let _this = getCurrentPages()[getCurrentPages().length - 1];
		if (!_this) return;

		var value = '';
		let newRoute;
		try {
			//公共语言包
			var lang = require('../../lang/' + locale + '/common.js').lang;
		
			//当前页面语言包
			let route = _this.route;
			let routeParts = route.split("/");
			
			// 映射新的页面目录到原来的语言文件目录
			if (routeParts[0] === 'pages_goods') {
				routeParts[0] = 'goods';
			} else if (routeParts[0] === 'pages_order') {
				routeParts[0] = 'order';
			} else if (routeParts[0] === 'pages_promotion' && routeParts[1] === 'point') {
				// 处理积分相关的推广页面，映射到point语言文件目录
				routeParts = ['point', routeParts[2]];
			} else if (routeParts[0] === 'pages' && routeParts[1] === 'member') {
				// 处理主包中的会员中心页面，映射到member目录
				routeParts = ['member', routeParts[2]];
			} else if (routeParts[0] === 'pages_tool') {
				// 处理工具页面目录，根据子目录映射到对应的语言文件目录
				if (routeParts[1] === 'member') {
					routeParts = ['member', routeParts[2]];
				} else if (routeParts[1] === 'order') {
					routeParts = ['order', routeParts[2]];
				} else if (routeParts[1] === 'goods') {
					routeParts = ['goods', routeParts[2]];
				} else if (routeParts[1] === 'help' || routeParts[1] === 'notice' || routeParts[1] === 'article') {
					// 处理CMS相关页面
					routeParts = [routeParts[1], routeParts[2]];
				}
			}
			
			let langPath = routeParts.join("/");
			let currentPageLang = require('../../lang/' + locale + '/' + langPath + '.js').lang;

			for (let f in currentPageLang) {
				lang[f] = currentPageLang[f];
			}

			var arr = field.split(".");
			if (arr.length > 1) {
				// 处理嵌套属性，如 common.currencySymbol
				let temp = lang;
				let found = true;
				for (let key of arr) {
					if (temp[key] !== undefined) {
						temp = temp[key];
					} else {
						found = false;
						break;
					}
				}
				value = found ? temp : field;
			} else {
				value = lang[field] !== undefined ? lang[field] : field;
			}
			
		} catch (e) {
			if (field.indexOf("common.") != -1 || field.indexOf("tabBar.") != -1) {
				value = lang[field];
			} else {
				value = field;
			}
		
		}

		if (arguments.length > 1) {
			//有参数,需要替换
			for (var i = 1; i < arguments.length; i++) {
				value = value.replace("{" + (i - 1) + "}", arguments[i]);
			}
		}
		if (value == undefined || (value == 'title' && field == 'title')) value = ''; // field
		return value;
	},
	/**
	 * * 切换语言
	 * @param {String} value 语言值
	 * @param {String} url 切换后跳转的页面url
	 */
	change(value, url = '/pages/member/index') {
		let _this = getCurrentPages()[getCurrentPages().length - 1];
		if (!_this) return;

		uni.setStorageSync("lang", value);
		locale = uni.getStorageSync('lang') || "zh-cn"; //设置语言

		this.refresh();

		if (url) {
			uni.reLaunch({ url: url });
		}
	},
	//刷新标题、tabbar
	refresh() {
		let _this = getCurrentPages()[getCurrentPages().length - 1];
		if (!_this) return;
		locale = uni.getStorageSync('lang') || "zh-cn"; //设置语言
	
		this.title(this.lang("title"));

		//设置tabbar的文字语言
		// uni.setTabBarItem({
		// 	index: 0,
		// 	text: this.lang("tabBar.home")
		// });
		// uni.setTabBarItem({
		// 	index: 1,
		// 	text: this.lang("tabBar.category")
		// });
		// uni.setTabBarItem({
		// 	index: 2,
		// 	text: this.lang("tabBar.cart")
		// });
		// uni.setTabBarItem({
		// 	index: 3,
		// 	text: this.lang("tabBar.member")
		// });
	},
	title(str) {
		if (str) {
			uni.setNavigationBarTitle({
				title: str,
				success: function (res) {
				},
				fail: function (err) {
				}
			});
		}
	},
	// 获取语言包列表
	list() {
		var list = [];
		try {
			//公共语言包
			for (var i = 0; i < langList.length; i++) {
				let item = require('../../lang/' + langList[i] + '/common.js').lang;
				list.push({
					name: item.common.name,
					value: langList[i]
				});
			}
		} catch (e) {
			// "没有找到语言包:", '../../lang/' + locale + '/common.js'
		}
		return list;
	}
}