// https://github.com/uxitten/polyfill/blob/master/string.polyfill.js
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart
import { Tag } from "antd";
import { CaretUpOutlined, CaretDownOutlined } from "@ant-design/icons";
import moment from "moment";

if (!String.prototype.padStart) {
	String.prototype.padStart = function padStart(targetLength, padString) {
		targetLength = targetLength >> 0; // floor if number or convert non-number to 0;
		padString = String(typeof padString !== "undefined" ? padString : " ");
		if (this.length > targetLength) {
			return String(this);
		} else {
			targetLength = targetLength - this.length;
			if (targetLength > padString.length) {
				padString += padString.repeat(targetLength / padString.length); // append to original to ensure we are longer than needed
			}
			return padString.slice(0, targetLength) + String(this);
		}
	};
}

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

export function named(value) {
	return function (target) {
		target.definedName = value;
	};
}

export function formatCurrency(name) {
	if (name === "USD") {
		return "$";
	} else if (name === "RMB") {
		return "￥";
	} else if (name === "EUR") {
		return "€";
	} else if (name === "GBP") {
		return "£";
	} else {
		return name + " ";
	}
}

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

// 千分符的金额转成数字，默认为0
export function price_to_number(price) {
	const num_string = (price + "").replace(/,/g, "");
	const number = parseFloat(num_string);
	return isNaN(number) ? 0 : number;
}

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

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 mixins(...list) {
	return function (target) {
		list.forEach(val => {
			const mixinObj = Object.create(val.prototype, {});
			const name = Object.getPrototypeOf(mixinObj).constructor.name;
			const camelCase = name.substr(0, 1).toLowerCase() + name.substr(1);
			Object.assign(target.prototype, { [camelCase]: mixinObj });
		});
	};
}

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, 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 empty(a) {
	if (a === "") return true; // 检验空字符串
	if (a === "null") return true; // 检验字符串类型的null
	if (a === "undefined") return true; // 检验字符串类型的 undefined
	if (!a && a !== 0 && a !== "") return true; // 检验 undefined 和 null
	if (Array.prototype.isPrototypeOf(a) && a.length === 0) return true; // 检验空数组
	if (Object.prototype.isPrototypeOf(a) && Object.keys(a).length === 0) return true; // 检验空对象
	return false;
}

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;
		let startTime = new Date();
	return function () {
		const 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 show_vs_tag(vs, vs_diff, data1, data2) {
	let tag = "-";
	if (parseInt(vs) < 0) {
		tag = (
			<Tag icon={<CaretDownOutlined />} color="gold">
				{vs} {vs_diff}
			</Tag>
		);
	} else if (parseInt(vs) > 0) {
		tag = (
			<Tag icon={<CaretUpOutlined />} color="lime">
				{vs} {vs_diff}
			</Tag>
		);
	}
	return (
		<span>
			<div>
				{data1} vs {data2}
			</div>
			{tag}
		</span>
	);
}

// 数组去掉重复
export function unique(arr) {
	const x = new Set(arr);
	return [...x];
}

export function getWeek(date) {
	// 参数时间戳
	const week = moment(date).day();
	switch (week) {
		case 1:
			return "周一";
		case 2:
			return "周二";
		case 3:
			return "周三";
		case 4:
			return "周四";
		case 5:
			return "周五";
		case 6:
			return "周六";
		case 0:
			return "周日";
	}
}

// 把非数字下标的数组设置下标，因为非数字数组的length为0导致读取失败
export function set_array_index(result) {
	const result_array = [];
	const result_keys = Object.keys(result);
	result_keys.sort(); // 必须做一次排序，用for in循环会导致顺序错误
	for (const key of result_keys) {
		result_array.push(result[key]);
	}
	return result_array;
}