const toString = Object.prototype.toString;

export function is(val: unknown, type: string) {
  return toString.call(val) === `[object ${type}]`;
}

export function isDef<T = unknown>(val?: T): val is T {
  return typeof val !== 'undefined';
}

export function isUnDef<T = unknown>(val?: T): val is T {
  return !isDef(val);
}

export function isObject(val: any): val is Record<any, any> {
  return val !== null && is(val, 'Object');
}

export function isEmpty<T = unknown>(val: T): val is T {
  if (isArray(val) || isString(val)) {
    return val.length === 0;
  }

  if (val instanceof Map || val instanceof Set) {
    return val.size === 0;
  }

  if (isObject(val)) {
    return Object.keys(val).length === 0;
  }

  return false;
}

export function isDate(val: unknown): val is Date {
  return is(val, 'Date');
}

export function isNull(val: unknown): val is null {
  return val === null;
}

export function isNullAndUnDef(val: unknown): val is null | undefined {
  return isUnDef(val) && isNull(val);
}

export function isNullOrUnDef(val: unknown): val is null | undefined {
  return isUnDef(val) || isNull(val);
}

export function isNumber(val: unknown): val is number {
  return is(val, 'Number');
}

export function stringIsNumber(val) {
  const regPos = /^\d+(\.\d+)?$/; //非负浮点数
  const regNeg =
    /^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$/; //负浮点数
  if (regPos.test(val) || regNeg.test(val)) {
    return true;
  } else {
    return false;
  }
}

export function isPromise<T = any>(val: unknown): val is Promise<T> {
  return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);
}

export function isString(val: unknown): val is string {
  return is(val, 'String');
}

export function isFunction(val: unknown): val is Function {
  return typeof val === 'function';
}

export function isBoolean(val: unknown): val is boolean {
  return is(val, 'Boolean');
}

export function isRegExp(val: unknown): val is RegExp {
  return is(val, 'RegExp');
}

export function isArray(val: any): val is Array<any> {
  return val && Array.isArray(val);
}

export function isWindow(val: any): val is Window {
  return typeof window !== 'undefined' && is(val, 'Window');
}

export function isElement(val: unknown): val is Element {
  return isObject(val) && !!val.tagName;
}

export function isMap(val: unknown): val is Map<any, any> {
  return is(val, 'Map');
}

export const isServer = typeof window === 'undefined';

export const isClient = !isServer;

export function isUrl(path: string): boolean {
  if (!path.includes('//')) return false;

  const urlRegex = /^(ftp|http|https):\/\/[^ "]+$/;

  return urlRegex.test(path);

  // const sRegex =
  //   '^((https|http|ftp|rtsp|mms)?://)' +
  //   "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-]+@)?" + //ftp的user@
  //   '(([0-9]{1,3}.){3}[0-9]{1,3}' + // IP形式的URL- 199.194.52.184
  //   '|' + // 允许IP和DOMAIN（域名）
  //   "([0-9a-z_!~*'()-]+.)*" + // 域名- www.
  //   '([0-9a-z][0-9a-z-]{0,61})?[0-9a-z].' + // 二级域名
  //   '[a-z]{2,6})' + // first level domain- .com or .museum
  //   '(:[0-9]{1,4})?' + // 端口- :80
  //   '((/?)|' + // a slash isn't required if there is no file name
  //   "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";
  // const re = new RegExp(sRegex);
  // return re.test(path);
  // const reg =
  //   /^(?:(http|https|ftp):\/\/)?((?:[\w-]+\.)+[a-z0-9]+)((?:\/[^/?#]*)+)?(\?[^#]+)?(#.+)?$/i;
  // // const reg =
  // //   /(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+(?::\d+)?|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)$/;
  // return reg.test(path);
}