/**
 * @description 函数防抖
 * @param fn 需要防抖的函数
 * @param delay 延迟时间（毫秒）
 * @param immediate 是否立即执行
 * @returns 防抖后的函数
 */
import dayjs from "dayjs";
export function debounce<T extends (...args: any[]) => any>(
    fn: T,
    delay = 200,
    immediate = false
): (...args: Parameters<T>) => ReturnType<T> | undefined {
    let timer: NodeJS.Timeout | null = null;
    let isInvoked = false;

    return function (this: ThisParameterType<T>, ...args: Parameters<T>) {
        const context = this;

        // 如果需要立即执行且未调用过
        if (immediate && !isInvoked) {
            isInvoked = true;
            return fn.apply(context, args);
        }

        // 清除之前的定时器
        if (timer) {
            clearTimeout(timer);
        }

        return new Promise<ReturnType<T>>((resolve) => {
            timer = setTimeout(() => {
                const result = fn.apply(context, args);
                isInvoked = false;
                resolve(result);
            }, delay);
        });
    };
}

export const phoneConvert = (number: string) => {
    if (!number) return "";
    let pat = /(\d{3})\d*(\d{3})/;
    return number.replace(pat, "$1****$2");
};

/**
 * @description  根据语言获取时区
 */
const language = ["pt-BR", "zh-CN", "en-US"];
function getLang(utc: string) {
    let reg = new RegExp(utc, "i");
    const i = language.findIndex((n, index) => {
        if (reg.test(n)) {
            return index;
        }
    });
    let n = i < 0 ? 0 : i;
    return language[n];
}
export const timeFormat = (
    time: number,
    lang = "en",
    delimiter?: undefined | string,
    day = false
): string => {
    if (!time) return "";
    const len = (time + "").length;
    if (len === 10) {
        time = time * 1000;
    }

    if (delimiter) {
        return dayjs(time).format("DD/MM/YYYY").replaceAll("/", delimiter);
    }
    // 月 /日 /  年
    // 日 / 月 / 年
    if (day) {
        return dayjs(time).format("DD/MM/YYYY");
    }
    return dayjs(time).format("DD/MM/YYYY HH:mm:ss");
};
export const brTimeFormat = (time: number) => {
    if (!time) return "";
    const len = (time + "").length;
    if (len === 10) {
        time = time * 1000;
    }
    const timeOffset = (new Date().getTimezoneOffset() - 3 * 60) * 60 * 1000;
    const brTime = time + timeOffset;
    return dayjs(brTime).format("DD/MM/YYYY HH:mm:ss");
};

/**
 * @description 复制文本
 */
export let copyText = function (text: string) {
    if (navigator.clipboard) {
        copyText = (text: string) => {
            navigator.clipboard.writeText(text);
        };
    } else {
        copyText = (text) => {
            const input = document.createElement("input");
            input.setAttribute("value", text);
            document.body.appendChild(input);
            input.select();
            document.execCommand("copy");
            document.body.removeChild(input);
        };
    }
    copyText(text);
};

/**
 * @description 两个数值计算百分比
 * @param {current} 当前值
 * @param {source} 总值
 * @return number
 */
export const percentage = (current: number, source: number) => {
    if (!source) return 0;
    const num = (current * 100) / source;
    return num > 100 ? 100 : flatPoint(num);
};

/**
 * @description 保留两位数浮点数
 */
export const flatPoint = (num: number) => {
    return Number(num.toFixed(2));
};

/**
 * @description 是否是移动端
 */
export function isMobile(): boolean {
    try {
        document.createEvent("TouchEvent");
        return true;
    } catch (e) {
        return false;
    }
}