import { getUrlType } from './meta';

// 加载第三方库
export const loadLib = (() => {
  const cache: Record<string, Promise<void>> = {};

  const load = (
    lib: string,
    success: () => void,
    err: () => void,
    maxReq = 0
  ) => {
    const el = document.createElement("script");
    el.src = lib;
    document.body.appendChild(el);
    el.onload = success;
    el.onerror = () => {
      if (maxReq > 0) {
        load(lib, success, err, --maxReq);
      } else {
        err();
      }
    };
  };

  return (lib: string) => {
    if (!cache[lib]) {
      cache[lib] = new Promise((resolve, reject) => {
        load(lib, resolve, reject, 3);
      });
    }
    return cache[lib];
  };
})();


export const getSizeStr = (size: number) => {
  let mb = size;
  if (mb < 1024) {
    return `${mb.toFixed(2)}BYTE`;
  }
  mb /= 1024;
  if (mb < 1024) {
    return `${mb.toFixed(2)}KB`;
  }
  mb /= 1024;
  if (mb < 1024) {
    return `${mb.toFixed(2)}MB`;
  }
  mb /= 1024;
  if (mb < 1024) {
    return `${mb.toFixed(2)}GB`;
  }
  mb /= 1024;
  return `${mb.toFixed(2)}TB`;
};

// 日期格式化
export const formatDate = (date: Date, fmt: string = 'yyyy-MM-dd hh:mm') => {
  const map = {
    'M+': date.getMonth() + 1, //月份
    'd+': date.getDate(), //日
    'h+': date.getHours(), //小时
    'm+': date.getMinutes(), //分
    's+': date.getSeconds(), //秒
    'q+': Math.floor((date.getMonth() + 3) / 3), //季度
    S: date.getMilliseconds() //毫秒
  }

  if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(
      RegExp.$1,
      date
        .getFullYear()
        .toString()
        .substr(4 - RegExp.$1.length)
    )
  }

  ;(Object.keys(map) as Array<keyof typeof map>).forEach(k => {
    if (new RegExp('(' + k + ')').test(fmt)) {
      const val = map[k].toString()
      fmt = fmt.replace(
        RegExp.$1,
        RegExp.$1.length === 1 ? val : ('00' + val).substr(val.length)
      )
    }
  })

  return fmt
}

export const togetherCallback = (cbs: (() => void)[]) => () => together(cbs)

export const together = (cbs: (() => void)[]) => {
  cbs.forEach(cb => cb())
}

export const getFileUrl = (file: LocalFile | string) => 
  typeof file === 'string'
    ? file
    : file.url
export const getFileName = (file: any): string => {
  return typeof file === 'string'
    ? file.substring(file.lastIndexOf('/') + 1)
    : file.blob instanceof File ? file.blob.name : getUrlType(file.url)
}

export const asyncTimeout = (mis: number = 0) => new Promise(resolve => setTimeout(resolve, mis))


export const jsonToForm = (data: { [key in string]: any }) => {
  const formData = new FormData()
  for (const [key, val] of Object.entries(data)) {
    if (Array.isArray(val)) {
      for (let i = 0; i < val.length; i++) {
        formData.append(`${key}`, val[i])  
      }
    } else {
      formData.append(key, val)
    }
  }
  return formData
}


// 防抖
export const debounce = <T extends (...args: any) => any>(
	fn: T,
	delay: number = 160
) => {
	let timeout: any;
	return function (...args: Parameters<T>) {
		clearTimeout(timeout);
		timeout = setTimeout(() => {
			fn.apply(null, args);
		}, delay);
	};
};

// 防抖
export const debounceStack = <T extends (...args: any) => any>(
	fn: T,
  success: (data: ReturnType<T> extends Promise<infer P> ? P : ReturnType<T>) => void,
	delay: number = 160
) => {
  let dsToken = 0
  return debounce(async (...args: Parameters<T>) => {
    ++dsToken
    const currentToken = dsToken
    const result = await fn.apply(null, args);
    if (currentToken === dsToken) {    
      success(result)
    }
  }, delay)
};


// 四舍五入保留指定位数
export const round = (num: number, index: number = 2) => {
  const s = Math.pow(10, index)
  return Math.round(num * s) / s
}

export * from './store-help'
export * from "./stack";
export * from "./loading";
export * from "./route";
export * from "./asyncBus";
export * from './mount'
export * from './watch'
export * from './diff'
export * from './params'
export * from './file-serve'
export * from './video-cover'
export * from './meta'





function randomWord(randomFlag: boolean, min: number, max?: number) {
  let str = "";
  let range = min;
  const arr = [
    "0",
    "1",
    "2",
    "3",
    "4",
    "5",
    "6",
    "7",
    "8",
    "9",
    "a",
    "b",
    "c",
    "d",
    "e",
    "f",
    "g",
    "h",
    "i",
    "j",
    "k",
    "l",
    "m",
    "n",
    "o",
    "p",
    "q",
    "r",
    "s",
    "t",
    "u",
    "v",
    "w",
    "x",
    "y",
    "z",
    "A",
    "B",
    "C",
    "D",
    "E",
    "F",
    "G",
    "H",
    "I",
    "J",
    "K",
    "L",
    "M",
    "N",
    "O",
    "P",
    "Q",
    "R",
    "S",
    "T",
    "U",
    "V",
    "W",
    "X",
    "Y",
    "Z",
  ];
  // 随机产生
  if (randomFlag && max) {
    range = Math.round(Math.random() * (max - min)) + min;
  }
  for (let i = 0; i < range; i++) {
    const pos = Math.round(Math.random() * (arr.length - 1));
    str += arr[pos];
  }
  return str;
}
import { Base64 } from "js-base64";
/**
 * 密码加密
 * @param {String} pwd
 */
export function encodePwd(str: string, strv: string): string[];
export function encodePwd(str: string): string;
export function encodePwd(str: string, strv = "") {
  str = Base64.encode(str);
  const NUM = 2;
  const front = randomWord(false, 8);
  const middle = randomWord(false, 8);
  const end = randomWord(false, 8);

  const str1 = str.substring(0, NUM);
  const str2 = str.substring(NUM);

  if (strv) {
    const strv1 = strv.substring(0, NUM);
    const strv2 = strv.substring(NUM);
    return [
      front + str2 + middle + str1 + end,
      front + strv2 + middle + strv1 + end,
    ];
  }

  return front + str2 + middle + str1 + end;
}


/**
 * 判断是否为 Firefox 且版本小于 targetVersion（如 "115.9"）
 * @param {string} targetVersion - 目标版本字符串，例如 "115.9"
 * @returns {boolean}
 */
export function isFirefoxBelow(targetVersion = "115.9") {
  // 尝试使用 navigator.userAgentData (更现代) 如果可用且包含 brands
  // 注意：userAgentData.brand/version 可能随浏览器策略返回受限信息
  const navigator = window.navigator as any
  if (navigator.userAgentData && Array.isArray(navigator.userAgentData.brands)) {
    // brands 形如 [{brand: "Chromium", version: "116"}, ...] 或可能被 UA 凭空
    for (const b of navigator.userAgentData.brands) {
      if (typeof b.brand === "string" && /firefox/i.test(b.brand)) {
        const ver = b.version || "";
        return compareVersionStrings(ver, targetVersion) < 0;
      }
    }
  }

  // 回退到 userAgent 字符串
  const ua = navigator.userAgent || "";
  // Firefox 的 UA 通常包含 "Firefox/<version>"
  const m = ua.match(/Firefox\/([0-9]+(?:\.[0-9]+)*)/i);
  if (m && m[1]) {
    const ver = m[1];
    return compareVersionStrings(ver, targetVersion) < 0;
  }

  // 不是 Firefox 或版本未知
  return false;
}

/**
 * 比较两个版本字符串（如 "115.9.1" 与 "115.9"）
 * 返回：
 *   -1 如果 v1 < v2
 *    0 如果 v1 == v2
 *    1 如果 v1 > v2
 */
function compareVersionStrings(v1: string, v2: string) {
  const seg1 = String(v1).split('.').map(s => parseInt(s, 10) || 0);
  const seg2 = String(v2).split('.').map(s => parseInt(s, 10) || 0);
  const len = Math.max(seg1.length, seg2.length);
  for (let i = 0; i < len; i++) {
    const a = seg1[i] || 0;
    const b = seg2[i] || 0;
    if (a < b) return -1;
    if (a > b) return 1;
  }
  return 0;
}