const toString = Object.prototype.toString

/**
 * @description: 判断值是否未某个类型
 */
export function is(val: unknown, type: string) {
  return toString.call(val) === `[object ${type}]`
}

/**
 * @description:  是否为函数
 */
export function isFunction<T = Function>(val: unknown): val is T {
  return is(val, 'Function')
}

/**
 * @description: 是否已定义
 */
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)
}
/**
 * @description: 是否为对象
 */
export function isObject<T = Record<string, any>>(val: unknown): val is T {
  return is(val, 'Object')
}

/**
 * @description:  是否为时间
 */
export function isDate(val: unknown): val is Date {
  return is(val, 'Date')
}

/**
 * @description:  是否为数值
 */
export function isNumber(val: unknown): val is number {
  return is(val, 'Number')
}

/**
 * @description:  是否为AsyncFunction
 */
export function isAsyncFunction<T = unknown, U = unknown>(
  val: unknown,
): val is (...args: U[]) => Promise<T> {
  return is(val, 'AsyncFunction')
}

/**
 * @description:  是否为promise
 */
export function isPromise<T = unknown>(val: unknown): val is Promise<T> {
  return (
    is(val, 'Promise')
    && isObject(val)
    && isFunction(val.then)
    && isFunction(val.catch)
  )
}

/**
 * @description:  是否为字符串
 */
export function isString(val: unknown): val is string {
  return is(val, 'String')
}

/**
 * @description:  是否为boolean类型
 */
export function isBoolean(val: unknown): val is boolean {
  return is(val, 'Boolean')
}

/**
 * @description:  是否为数组
 */
export function isArray<T = unknown>(val: unknown): val is Array<T> {
  return Array.isArray(val)
}

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

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

/**
 * @description: 是否客户端
 */
export function isClient() {
  return typeof window !== 'undefined'
}

/**
 * @description: 是否为浏览器
 */
export function isWindow(val: unknown): val is Window {
  return typeof window !== 'undefined' && is(val, 'Window')
}

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

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

// 是否为图片节点
export function isImageDom(o: Element) {
  return o && ['IMAGE', 'IMG'].includes(o.tagName)
}