import { siteConfig } from '@/lib/config'
import { deepClone, isBrowser } from '@/lib/utils'
import BlogCard from './BlogCard'
import BlogPostListEmpty from './BlogListEmpty'
import PaginationSimple from './PaginationSimple'
import { useEffect, useState } from 'react'
import { debounce } from 'lodash'
import { AdSlot } from '@/components/GoogleAdsense'
/**
 * 文章列表分页表格
 * @param page 当前页
 * @param posts 所有文章
 * @param tags 所有标签
 * @returns {JSX.Element}
 * @constructor
 */
const BlogListPage = ({ page = 1, posts = [], postCount, siteInfo }) => {
  const totalPage = Math.ceil(postCount / parseInt(siteConfig('POSTS_PER_PAGE')))
  const showNext = page < totalPage

  const [columns, setColumns] = useState(calculateColumns())
  const [filterPosts, setFilterPosts] = useState([])

  useEffect(() => {
    const handleResize = debounce(() => {
      setColumns(calculateColumns())
    }, 200)
    window.addEventListener('resize', handleResize)
    return () => window.removeEventListener('resize', handleResize)
  }, [])

  /**
   * 文章重新布局，使纵向排列看起来是横向排列
   */
  useEffect(() => {
    const count = posts?.length || 0
    const rows = Math.ceil(count / columns)
    const newFilterPosts = []
    for (let i = 0; i < columns; i++) {
      for (let j = 0; j < rows; j++) {
        const index = j * columns + i
        if (index < count) {
          newFilterPosts.push(deepClone(posts[index]))
        }
      }
    }
    setFilterPosts(newFilterPosts)
  }, [columns, posts])

  if (!filterPosts || filterPosts.length === 0) {
    return <BlogPostListEmpty />
  } else {
    return (
      <div>
        {/* 文章列表 */}
        <div id="posts-wrapper" className='grid-container'>
          {filterPosts?.map(post => (
            <div key={post.id} className='grid-item justify-center flex' style={{ breakInside: 'avoid' }}>
              <BlogCard index={posts.indexOf(post)} key={post.id} post={post} siteInfo={siteInfo} />
            </div>
          ))}
          {siteConfig('ADSENSE_GOOGLE_ID') && (
            <div className='p-3'>
                <AdSlot type='flow'/>
            </div>
          )}

        </div>
        <PaginationSimple page={page} showNext={showNext} />
      </div>
    )
  }
}

/**
 * 计算文章列数
 * @returns
 */
const calculateColumns = () => {
  if (!isBrowser) {
    return 3
  } else {
    if (window.innerWidth >= 1024) {
      return 3
    } else if (window.innerWidth >= 640) {
      return 2
    } else {
      return 1
    }
  }
}

export default BlogListPage