export function copy(obj) {
	return JSON.parse(JSON.stringify(obj));
}

export function formatDate(date) {
	if (isEmpty(date)) {
		return "NaN";
	}

	const year = date.getFullYear();
	const month = date.getMonth() + 1;
	const day = date.getDate();

	const monthStr = ("" + month).padStart(2, 0);
	const dayStr = ("" + day).padStart(2, 0);
	const formatted = year + "-" + monthStr + "-" + dayStr;

	return formatted;
}

export function formatTime(date) {
	const hours = date.getHours();
	const minutes = date.getMinutes();

	const hoursStr = ("" + hours).padStart(2, 0);
	const minutesStr = ("" + minutes).padStart(2, 0);
	const formatted = hoursStr + ":" + minutesStr;

	return formatted;
}

export function formatDatetime(date) {
	const year = date.getFullYear();
	const month = date.getMonth() + 1;
	const day = date.getDate();

	const monthStr = ("" + month).padStart(2, 0);
	const dayStr = ("" + day).padStart(2, 0);

	const hours = date.getHours();
	const minutes = date.getMinutes();

	const hoursStr = ("" + hours).padStart(2, 0);
	const minutesStr = ("" + minutes).padStart(2, 0);

	const formatted = year + "-" + monthStr + "-" + dayStr + " " + hoursStr + ":" + minutesStr;

	return formatted;
}

export function camelCase(name) {
	return name.substr(0, 1).toLowerCase() + name.substr(1);
}

export class UrlBuilder {
	constructor(url) {
		this.url = url;
		this.paramList = [];
	}

	append(name, value) {
		if (isNotEmpty(value)) {
			this.paramList.push({ name: name, value: value });
		}
		return this;
	}

	build() {
		this.paramList.forEach((e, i, a) => {
			if (i === 0) {
				this.url += "?";
			} else {
				this.url += "&";
			}
			this.url += e.name + "=" + e.value;
		});
		return this.url;
	}
}

export function isNotEmpty(val) {
	return val !== undefined && val !== null && val !== "";
}

export function isEmpty(val) {
	return val === undefined || val === null || val === "";
}

export function prepareUrl(url) {
	return new UrlBuilder(url);
}

export function debounce(fn, delay = 500) {
	let timer;
	return e => {
		e.persist();
		clearTimeout(timer);
		timer = setTimeout(() => {
			fn(e);
		}, delay);
	};
}

export function throttle(fn, delay, atleast) {
	let timeout = null,
		startTime = new Date();
	return function () {
		let curTime = new Date();
		clearTimeout(timeout);
		if (curTime - startTime >= atleast) {
			fn();
			startTime = curTime;
		} else {
			timeout = setTimeout(fn, delay);
		}
	};
}

export function clickUrl(url) {
	const httpLink = document.createElement("a");
	httpLink.href = url;
	httpLink.target = "_blank";
	httpLink.click();
}

export function escape2Html(str) {
	var temp = document.createElement("div");
	temp.innerHTML = str;
	var output = temp.innerText || temp.textContent;
	temp = null;
	return output;
  }

export function groupBy(array, callback) {
  return array.reduce((groups, item) => {
    const key = typeof callback === 'function' ? callback(item) : item[callback];

    if (!groups[key]) {
      groups[key] = [];
    }

    groups[key].push(item);
    return groups;
  }, {});
}


export function formatPrice(price) {
	return Math.ceil(price).toLocaleString();
}

export function formatPercent(number) {
	return Math.round(number * 100) + "%";
}