import LogoBar from './LogoBar'
import { useEffect, useRef, useState } from 'react'
import Collapse from '@/components/Collapse'
import { MenuBarMobile } from './MenuBarMobile'
import { useGlobal } from '@/lib/global'
import CONFIG from '../config'
import { MenuItemDrop } from './MenuItemDrop'
import { siteConfig } from '@/lib/config'
import throttle from 'lodash.throttle'

/**
 * 顶部导航栏 + 菜单
 * @param {} param0
 * @returns
 */
export default function Header(props) {
  const { customNav, customMenu } = props
  const [isOpen, changeShow] = useState(false)
  const collapseRef = useRef(null)

  const { locale } = useGlobal()

  const defaultLinks = [
    { icon: 'fas fa-th', name: locale.COMMON.CATEGORY, to: '/category', show: CONFIG.MENU_CATEGORY },
    { icon: 'fas fa-tag', name: locale.COMMON.TAGS, to: '/tag', show: CONFIG.MENU_TAG },
    { icon: 'fas fa-archive', name: locale.NAV.ARCHIVE, to: '/archive', show: CONFIG.MENU_ARCHIVE },
    { icon: 'fas fa-search', name: locale.NAV.SEARCH, to: '/search', show: CONFIG.MENU_SEARCH }
  ]

  let links = defaultLinks.concat(customNav)

  const toggleMenuOpen = () => {
    changeShow(!isOpen)
  }

  // 向下滚动时，调整导航条高度
  useEffect(() => {
    scrollTrigger()
    window.addEventListener('scroll', scrollTrigger)
    return () => {
      window.removeEventListener('scroll', scrollTrigger)
    }
  }, [])

  const throttleMs = 150

  const scrollTrigger = throttle(() => {
    const scrollS = window.scrollY
    const nav = document.querySelector('#top-navbar')

    const narrowNav = scrollS > 50
    if (narrowNav) {
      nav && nav.classList.replace('h-24', 'h-14')
    } else {
      nav && nav.classList.replace('h-14', 'h-24')
    }
  }, throttleMs)

  // 如果 开启自定义菜单，则覆盖Page生成的菜单
  if (siteConfig('CUSTOM_MENU')) {
    links = customMenu
  }

  if (!links || links.length === 0) {
    return null
  }

  return <div id='top-navbar-wrapper' className={'sticky top-0 w-full z-40 shadow bg-white dark:bg-hexo-black-gray '}>

        {/* 导航栏菜单内容 */}
        <div id="top-navbar" className='px-4 flex w-full mx-auto max-w-screen-xl h-24 transition-all duration-200 items-between'>

            {/* 左侧图标Logo */}
            <LogoBar {...props} />

            {/* 移动端折叠按钮 */}
            <div className='mr-1 flex md:hidden justify-end items-center text-lg space-x-4 font-serif dark:text-gray-200'>
                <div onClick={toggleMenuOpen} className='cursor-pointer'>
                    {isOpen ? <i className='fas fa-times' /> : <i className='fas fa-bars' />}
                </div>
            </div>

            {/* 桌面端顶部菜单 */}
            <div className='hidden md:flex items-center'>
                {links && links?.map(link => <MenuItemDrop key={link?.id} link={link} />)}
            </div>
        </div>

          {/* 移动端折叠菜单 */}
          <Collapse type='vertical' collapseRef={collapseRef} isOpen={isOpen} className='md:hidden'>
            <div className='bg-white dark:bg-hexo-black-gray pt-1 py-2 lg:hidden '>
                <MenuBarMobile {...props} onHeightChange={(param) => collapseRef.current?.updateCollapseHeight(param)} />
            </div>
        </Collapse>
    </div>
}