import { isFunction, isNil, isObj } from 'exotic'

export const IS_BROWSER = typeof window === 'object'

export function isClickOutsideElement(event, dom): boolean {
  // get direct click event target
  const { target } = event
  // get container that we'll wait to be clicked outside
  const container = dom

  // if target is container - container was not clicked outside
  // if container contains clicked target - click was not outside of it
  if (
    target !== container &&
    isObj(container) &&
    isFunction(container.contains) &&
    !container.contains(target)
  ) {
    // clicked outside - fire callback
    return true
  } else {
    return false
  }
}

// toBoolean
export function isClickInsideElement(event, dom): boolean {
  if (isNil(dom) === true) {
    return false
  } else {
    return isClickOutsideElement(event, dom) === false
  }
}