import { createClient } from '@supabase/supabase-js'
import { DateTime } from 'luxon'
import slugify from 'slugify'

const SUPABASE_URL = process.env.SUPABASE_URL
const SUPABASE_KEY = process.env.SUPABASE_KEY
const supabase = createClient(SUPABASE_URL, SUPABASE_KEY)

const PAGE_SIZE = 50

const fetchTagsForPost = async (postId) => {
  const { data, error } = await supabase
    .from('posts_tags')
    .select('tags(id, name)')
    .eq('posts_id', postId)

  if (error) {
    console.error(`Error fetching tags for post ${postId}:`, error)
    return []
  }

  return data.map(pt => pt.tags.name)
}

const fetchAllPosts = async () => {
  let posts = []
  let page = 0
  let fetchMore = true

  while (fetchMore) {
    const { data, error } = await supabase
      .from('posts')
      .select('*')
      .order('date', { ascending: false })
      .range(page * PAGE_SIZE, (page + 1) * PAGE_SIZE - 1)

    if (error) {
      console.error('Error fetching posts:', error)
      return posts
    }

    if (data.length < PAGE_SIZE) fetchMore = false

    for (const post of data) {
      post.tags = await fetchTagsForPost(post.id)
      post.url = `/posts/${DateTime.fromISO(post.date).year}/${slugify(post.title, {
        replacement: '-',
        remove: /[#,&,+()$~%.'":*?<>{}\[\]\/\\|`!@\^\—]/g,
        lower: true,
      })}/`
    }

    posts = posts.concat(data)
    page++
  }

  return posts
}

export default async function () {
  return await fetchAllPosts()
}