import { TypeTag } from '@/common/utils/index.ts'
import { isString } from '@/common/utils/types.ts'


/**
 * 检查是否为普通对象
 * @param obj 待检查对象
 */
export function isSimpleObject(obj: any) {
  if (Object.prototype.toString.call(obj) !== TypeTag.OBJECT) {
    return false
  }

  let firstProto = Object.getPrototypeOf(obj)
  if (firstProto == null) {
    return true
  }

  let proto = firstProto
  let pt = null
  while ((pt = Object.getPrototypeOf(proto)) != null) {
    proto = pt
  }
  return firstProto === proto
}

/**
 * 检查是否为类数组
 * @param obj 待检查对象
 */
export function isArrayLike(obj: any) {
  return obj != null &&
      typeof obj !== 'function' &&
      (typeof obj.length === 'number' &&
          obj.length > -1 &&
          obj.length % 1 === 0 &&
          obj.length <= Number.MAX_SAFE_INTEGER)
}

/**
 * 检查是否为纯数字字符串
 * @param obj 待检查对象
 */
export function isNumStr(obj: any) {
  return isString(obj) && !isNaN(Number(obj))
}

export default {
  isSimpleObject,
  isArrayLike,
  isNumStr,
}