story-research-zapwall/hooks/useArticles.ts

import { useEffect, useMemo, useRef, useState } from 'react'
import { nostrService } from '@/lib/nostr'
import type { Article } from '@/types/nostr'
import { applyFiltersAndSort } from '@/lib/articleFiltering'
import type { ArticleFilters } from '@/components/ArticleFilters'
import { t } from '@/lib/i18n'
import { objectCache } from '@/lib/objectCache'
import { getAuthorSponsoring } from '@/lib/sponsoring'

export function useArticles(searchQuery: string = '', filters: ArticleFilters | null = null): {
  articles: Article[]
  allArticles: Article[]
  loading: boolean
  error: string | null
  loadArticleContent: (articleId: string, authorPubkey: string) => Promise<Article | null>
} {
  const [articles, setArticles] = useState<Article[]>([])
  const [loading, setLoading] = useState(true)
  const [error, setError] = useState<string | null>(null)
  const hasArticlesRef = useRef(false)

  useEffect(() => {
    setLoading(true)
    setError(null)

    // Load authors from cache first
    const loadAuthorsFromCache = async (): Promise<void> => {
      try {
        const cachedAuthors = await objectCache.getAll('author')
        const authors = cachedAuthors as Article[]
        
        // Calculate totalSponsoring for each author
        const authorsWithSponsoring = await Promise.all(
          authors.map(async (author) => {
            if (author.isPresentation && author.pubkey) {
              author.totalSponsoring = await getAuthorSponsoring(author.pubkey)
            }
            return author
          })
        )

        if (authorsWithSponsoring.length > 0) {
          setArticles((prev) => {
            // Merge with existing articles, avoiding duplicates
            const existingIds = new Set(prev.map((a) => a.id))
            const newAuthors = authorsWithSponsoring.filter((a) => !existingIds.has(a.id))
            const merged = [...prev, ...newAuthors].sort((a, b) => b.createdAt - a.createdAt)
            hasArticlesRef.current = merged.length > 0
            return merged
          })
        }
      } catch (error) {
        console.error('Error loading authors from cache:', error)
      }
    }

    void loadAuthorsFromCache()

    const unsubscribe = nostrService.subscribeToArticles(
      (article) => {
        setArticles((prev) => {
          if (prev.some((a) => a.id === article.id)) {
            return prev
          }
          const next = [article, ...prev].sort((a, b) => b.createdAt - a.createdAt)
          hasArticlesRef.current = next.length > 0
          return next
        })
        setLoading(false)
      },
      50
    )

    const timeout = setTimeout(() => {
      setLoading(false)
      if (!hasArticlesRef.current) {
        setError(t('common.error.noContent'))
      }
    }, 10000)

    return () => {
      unsubscribe()
      clearTimeout(timeout)
    }
  }, [])

  const loadArticleContent = async (articleId: string, authorPubkey: string): Promise<Article | null> => {
    try {
      const article = await nostrService.getArticleById(articleId)
      if (article) {
        // Try to decrypt article content using decryption key from private messages
        const decryptedContent = await nostrService.getDecryptedArticleContent(articleId, authorPubkey)
        if (decryptedContent) {
          setArticles((prev) =>
            prev.map((a) =>
              (a.id === articleId
                ? { ...a, content: decryptedContent, paid: true }
                : a)
            )
          )
        }
        return article
      }
    } catch (e) {
      console.error('Error loading article content:', e)
      setError(e instanceof Error ? e.message : 'Failed to load article')
    }
    return null
  }

  // Apply filters and sorting
  const filteredArticles = useMemo(() => {
    const effectiveFilters =
      filters ??
      ({
        authorPubkey: null,
        sortBy: 'newest',
        category: 'all',
      } as const)

    if (!filters && !searchQuery.trim()) {
      return articles
    }

    return applyFiltersAndSort(articles, searchQuery, effectiveFilters)
  }, [articles, searchQuery, filters])

  return {
    articles: filteredArticles,
    allArticles: articles, // Return all articles for filters component
    loading,
    error,
    loadArticleContent,
  }
}