"use strict"
class Utils {
	static convert_any(from, to, val){
		let val_in_b = 0;
		switch(from){
			case "kbps":
				val_in_b = val * 1000; break;
			case "mbps":
				val_in_b = val * 1000 * 1000; break;
			case "bps":
			default:
				val_in_b=val;
		}
		switch(to){
			case "kbps":
				return val_in_b / 1000;
			case "mbps":
				return val_in_b / 1000 / 1000;
			case "bps":
			default:
				return val_in_b
		}
	}

	static set_cookie(name, value, days) {
		var expires = "";
		if (days) {
			var date = new Date();
			date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
			expires = "; expires=" + date.toGMTString();
		}
		document.cookie = `${name}=${value}${expires}; path=/; secure; samesite=strict`;
	}

	static get_cookie(name) {
		name = name + "=";
		var cookies = document.cookie.split(';');
		for (var i = 0; i < cookies.length; i++) {
			var c = cookies[i];
			while (c.charAt(0) == ' '){c = c.substring(1, c.length);}
			if (c.indexOf(name) == 0){return c.substring(name.length, c.length);}
		}
		return null;
	}

	static get_query_param(name, url) {
		if (!url) url = window.location.href;
		name = name.replace(/[\[\]]/g, "\\$&");
		var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
			results = regex.exec(url);
		if (!results) return null;
		if (!results[2]) return '';
		return decodeURIComponent(results[2].replace(/\+/g, " "));
	}

	static roundNumber(num) {
		let decimalPlace = 10
		let roundedNum = Math.round(num * decimalPlace) / decimalPlace
		return roundedNum.toFixed(1)
	}

	static getPerformanceStats(history, key) {
		let result = {}
		let half = 2
		let histList = history.map((test)=>{return Number(test[key])})
		histList.sort((a,b)=>(a-b))
		result[key+"Max"] = Math.max(...histList)
		result[key+"Min"] = Math.min(...histList)
		result[key+"Median"] = histList[Math.floor(history.length / half)]
		if (history.length % half === 0) {
			let secondNum = histList[Math.floor(history.length / half) - 1]
			result[key+"Median"] = (result[key+"Median"] + secondNum) / half
		}
		return result
	}

	static loadScript(path, callback) {
		const script = document.createElement("script")
		script.src = path
		script.async = true
		script.onload = () => {
			console.log("loaded " + path)
			callback()
		}
		document.body.appendChild(script)
	}

	static writeLocalStorage(valueName,addObject) {
		localStorage.setItem(valueName, JSON.stringify(addObject));
	}

	static readLocalStorage(valueName) {
		let retrievedObject = localStorage.getItem(valueName);
		return JSON.parse(retrievedObject)
	}

	static removeLocalStorage(valueName) {
		localStorage.removeItem(valueName)
		return true
	}

	static appendLocalStorage(objectName,newObject,maxRecords) {
		let value = this.readLocalStorage(objectName) || []
		if (maxRecords && value.length >= maxRecords) {value.shift()}
		value.push(newObject)
		this.writeLocalStorage(objectName, value)
	}
}

Utils.version = '0.0.1'
Utils.convert = {
	bps_to_mbps: (v)=>{return Utils.convert_any("bps", "mbps", v)},
	kbps_to_bps: (v)=>{return Utils.convert_any("kbps", "bps", v)},
	kbps_to_mbps: (v)=>{return Utils.convert_any("kbps", "mbps", v)},
	bps_to_kbps: (v)=>{return Utils.convert_any("bps", "kbps", v)},
	mbps_to_kbps: (v)=>{return Utils.convert_any("mbps", "kbps", v)},
	mbps_to_bps: (v)=>{return Utils.convert_any("mbps", "bps", v)},
}