[slug].js

import BLOG from '@/blog.config'
import { getPostBlocks } from '@/lib/notion'
import { getGlobalNotionData } from '@/lib/notion/getNotionData'
import { useGlobal } from '@/lib/global'
import * as ThemeMap from '@/themes'
import { useEffect, useState } from 'react'
import { useRouter } from 'next/router'

/**
 * 根据notion的slug访问页面
 * @param {*} props
 * @returns
 */
const Slug = props => {
  const { theme } = useGlobal()
  const ThemeComponents = ThemeMap[theme]
  const { post } = props

  if (!post) {
    const router = useRouter()
    useEffect(() => {
      setTimeout(() => {
        if (window) {
          const article = document.getElementById('container')
          if (!article) {
            router.push('/404').then(() => {
              console.warn('找不到页面', router.asPath)
            })
          }
        }
      }, 3000)
    })
    const meta = { title: `${props?.siteInfo?.title} | loading` }
    return <ThemeComponents.LayoutSlug {...props} showArticleInfo={true} meta={meta} />
  }

  // 文章锁🔐
  const [lock, setLock] = useState(post.password && post.password !== '')
  useEffect(() => {
    if (post.password && post.password !== '') {
      setLock(true)
    } else {
      setLock(false)
    }
  }, [post])

  /**
   * 验证文章密码
   * @param {*} result
   */
  const validPassword = result => {
    if (result) {
      setLock(false)
    }
  }

  props = { ...props, lock, setLock, validPassword }

  const { siteInfo } = props
  const meta = {
    title: `${props.post.title} | ${siteInfo.title}`,
    description: props.post.summary,
    type: 'article',
    slug: 'article/' + props.post.slug,
    image: props.post.page_cover,
    category: props.post.category?.[0],
    tags: props.post.tags
  }

  return (
    <ThemeComponents.LayoutSlug {...props} showArticleInfo={true} meta={meta} />
  )
}

export async function getStaticPaths() {
  if (!BLOG.isProd) {
    return {
      paths: [],
      fallback: true
    }
  }

  const from = 'slug-paths'
  const { allPosts } = await getGlobalNotionData({ from })
  return {
    paths: allPosts.map(row => ({ params: { slug: row.slug } })),
    fallback: true
  }
}

export async function getStaticProps({ params: { slug } }) {
  const from = `slug-props-${slug}`
  const props = await getGlobalNotionData({ from, pageType: ['Post'] })
  const allPosts = props.allPosts
  props.post = props.allPosts.find(p => p.slug === slug)
  if (!props.post) {
    return { props, revalidate: 1 }
  }
  props.post.blockMap = await getPostBlocks(props.post.id, 'slug')

  const index = allPosts.indexOf(props.post)
  props.prev = allPosts.slice(index - 1, index)[0] ?? allPosts.slice(-1)[0]
  props.next = allPosts.slice(index + 1, index + 2)[0] ?? allPosts[0]
  props.recommendPosts = getRecommendPost(
    props.post,
    allPosts,
    BLOG.POST_RECOMMEND_COUNT
  )
  return {
    props,
    revalidate: 1
  }
}

/**
 * 获取文章的关联推荐文章列表，目前根据标签关联性筛选
 * @param post
 * @param {*} allPosts
 * @param {*} count
 * @returns
 */
function getRecommendPost(post, allPosts, count = 6) {
  let recommendPosts = []
  const postIds = []
  const currentTags = post.tags || []
  for (let i = 0; i < allPosts.length; i++) {
    const p = allPosts[i]
    if (p.id === post.id || p.type.indexOf('Post') < 0) {
      continue
    }

    for (let j = 0; j < currentTags.length; j++) {
      const t = currentTags[j]
      if (postIds.indexOf(p.id) > -1) {
        continue
      }
      if (p.tags && p.tags.indexOf(t) > -1) {
        recommendPosts.push(p)
        postIds.push(p.id)
      }
    }
  }

  if (recommendPosts.length > count) {
    recommendPosts = recommendPosts.slice(0, count)
  }
  return recommendPosts
}

export default Slug