const REQUESTURL = "http://192.168.2.164:8888"; //请求路径
// 短文字提示框
const LOADING = function(msg) {
	uni.showLoading({
		title: msg, // 除支付宝最多显示7个汉字长度
		icon: "none"
	})
};
// 请求参数拦截器
const REQUESTOPTIONSINTERCEPT = function(options) {
	return options;
};
// 服务器应答数据拦截器
const REQUESTSUCCESSINTERCEPT = function(res) {
	res = res.data;
	if (res.code != 0) throw res.msg;
	return res;
};
// 传递给global的参数
const GLOBALOPTIONS = {
	REQUESTURL
};
// 将暴露在整个项目的全局自定义类
class global {
	constructor(options) {
		this.options = options;
		this.loading = LOADING;
		this.systemInfo = getSystemInfo();
		this.prev = Date.now(); //节流使用
	}
	// 获取二维码参数 options.scene
	qrcodeValue(scene){
     scene=decodeURIComponent(scene).split("&");
	 scene = scene.map(item => (item.split("=")));
	 return Object.fromEntries(scene);
	}
	
	// 富文本处理
	richTextChange(value){
		/**
		 * 此代码段处理目的为，匹配富文本代码中的 <img> 标签，并将其图片的宽度修改为适应屏幕
		 * max-width:100% 		--- 图片宽度加以限制，避免超出屏幕
		 * height:auto 	 	   	--- 高度自适应
		 * display:block       	--- 此代码，可以去掉图片之间的空白间隔，个人觉得好用
		 */
		value = value.replace(/<img/gi, '<img style="max-width:100%;height:auto;display:block" ');
	    return value;
	}

	// 数字转字符串占位
	numberPlaceholder(number, len = 2) {
		var string = number.toString();
		if (string.length > len) return string;
		for (let i = 0; i < len - string.length; i++) {
			string = '0' + string;
		}
		return string;
	}

	// 防抖
	debounce(func, wait = 1000) {
		if (typeof func !== 'function') {
			throw new TypeError('need a function arguments')
		}
		let timeid = null;
		let result;

		return function() {
			let context = this;
			let args = arguments;

			if (timeid) {
				clearTimeout(timeid);
			}
			timeid = setTimeout(function() {
				result = func.apply(context, args);
			}, wait);

			return result;
		}
	}

	// 节流
	throttle(func, delay = 1000) {
		let that = this;
		return function() {
			var context = this;
			var args = arguments;
			var now = Date.now();
			if (now - that.prev >= delay) {
				console.log("执行")
				func.apply(context, args);
				that.prev = Date.now();
			}
		}
	}

	// 请求
	request(options) {
		options.url = this.options.REQUESTURL + options.url;
		options = REQUESTOPTIONSINTERCEPT(options);
		// 根据参数判断loading的形态
		if (options.loading) {
			uni.showLoading(showLoadingValueTypeOf(options.loading) ? {
				title: options.loading
			} : {});
		}
		return new Promise((resolve, reject) => {
			uni.request({
				...options,
				success(res) {
					try {
						res = REQUESTSUCCESSINTERCEPT(res)
						resolve(res);
					} catch (err) {
						reject(err)
					}
				},
				fail(err) {
					reject(err);
				},
				complete() {
					options.complete && options.complete();
					if (options.loading) uni.hideLoading();
				}
			})
		})
	}
}

function showLoadingValueTypeOf(value) {
	return typeof(value) == 'string';
}
// 系统数据
function getSystemInfo() {
	const options = {};
	uni.getSystemInfo({
		success: res => {
			options.StatusBar = res.statusBarHeight;
			var capsule = wx.getMenuButtonBoundingClientRect();
			if (capsule) {
				options.Custom = capsule;
				options.CustomBar = capsule.bottom + capsule.top - res.statusBarHeight;
			} else {
				options.CustomBar = res.statusBarHeight + 50;
			}
		}
	})
	return options;
}

export default new global(GLOBALOPTIONS);