import { useState, useEffect, useRef } from 'react';

export function useAdminCatalog() {
  const [cards, setCards] = useState([]);
  const [loading, setLoading] = useState(true);
  const [loadingMore, setLoadingMore] = useState(false);
  const [searchQuery, setSearchQuery] = useState('');
  const [selectedGame, setSelectedGame] = useState('all');
  const [selectedRarity, setSelectedRarity] = useState('all');
  const [selectedSet, setSelectedSet] = useState('all');
  const [minPrice, setMinPrice] = useState('');
  const [maxPrice, setMaxPrice] = useState('');
  const [verifiedOnly, setVerifiedOnly] = useState(false);
  const [sortColumn, setSortColumn] = useState('name');
  const [sortDirection, setSortDirection] = useState('asc');
  const [pagination, setPagination] = useState({
    page: 1,
    limit: 50,
    total: 0,
    pages: 0
  });
  const [filters, setFilters] = useState({
    games: [],
    rarities: [],
    sets: []
  });
  const [hasMore, setHasMore] = useState(true);
  const [error, setError] = useState(null);
  const loadingMoreRef = useRef(false);
  const hasMoreRef = useRef(true);
  const abortControllerRef = useRef(null);

  const fetchCards = async (isLoadMore = false) => {
    if (isLoadMore && (loadingMoreRef.current || !hasMoreRef.current)) return;
    
    let signal;
    try {
      if (isLoadMore) {
        setLoadingMore(true);
        loadingMoreRef.current = true;
      } else {
        setLoading(true);
        setError(null);
      }

      abortControllerRef.current = new AbortController();
      ({ signal } = abortControllerRef.current);

      const params = new URLSearchParams({
        query: searchQuery,
        game: selectedGame,
        rarity: selectedRarity,
        set: selectedSet,
        minPrice,
        maxPrice,
        page: isLoadMore ? pagination.page + 1 : 1,
        limit: pagination.limit,
        sort: sortColumn,
        dir: sortDirection,
        verifiedOnly: verifiedOnly.toString()
      });

      const response = await fetch(`/api/admin/cards?${params}`, {
        signal
      });

      if (!response.ok) {
        throw new Error(`HTTP ${response.status}`);
      }

      const data = await response.json();
      
      if (signal.aborted) return;

      if (data.success) {
        const newCards = data.cards;
        if (isLoadMore) {
          setCards(prev => [...prev, ...newCards]);
        } else {
          setCards(newCards);
        }
        setPagination(data.pagination);
        setFilters(data.filters);
        setHasMore(data.pagination.hasMore);
        hasMoreRef.current = data.pagination.hasMore;
      } else {
        throw new Error(data.error || 'Failed to fetch cards');
      }
    } catch (err) {
      if (err.name !== 'AbortError') {
        console.error('Error fetching admin cards:', err);
        setError(err.message);
      }
    } finally {
      if (!signal?.aborted) {
        setLoading(false);
        setLoadingMore(false);
        loadingMoreRef.current = false;
      }
    }
  };

  const handleSearchChange = (value) => {
    setSearchQuery(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleGameChange = (value) => {
    setSelectedGame(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleRarityChange = (value) => {
    setSelectedRarity(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleSetChange = (value) => {
    setSelectedSet(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleMinPriceChange = (value) => {
    setMinPrice(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleMaxPriceChange = (value) => {
    setMaxPrice(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleVerifiedChange = (value) => {
    setVerifiedOnly(value);
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
  };

  const handleSort = (column) => {
    if (sortColumn === column) {
      setSortDirection(prev => prev === 'asc' ? 'desc' : 'asc');
    } else {
      setSortColumn(column);
      setSortDirection('asc');
    }
  };

  const handleLoadMore = () => {
    if (!loadingMore && hasMore) {
      fetchCards(true);
    }
  };

  const handleRefresh = () => {
    setPagination(prev => ({ ...prev, page: 1 }));
    setCards([]);
    fetchCards(false);
  };

  const handleLimitChange = (limit) => {
    setPagination(prev => ({ ...prev, limit, page: 1 }));
    setCards([]);
  };

  useEffect(() => {
    fetchCards(false);
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  useEffect(() => {
    return () => {
      if (abortControllerRef.current) {
        abortControllerRef.current.abort();
      }
    };
  }, []);

  return {
    cards,
    loading,
    loadingMore,
    searchQuery,
    selectedGame,
    selectedRarity,
    selectedSet,
    minPrice,
    maxPrice,
    verifiedOnly,
    sortColumn,
    sortDirection,
    pagination,
    filters,
    hasMore,
    error,
    handleSearchChange,
    handleGameChange,
    handleRarityChange,
    handleSetChange,
    handleMinPriceChange,
    handleMaxPriceChange,
    handleVerifiedChange,
    handleSort,
    handleLoadMore,
    handleRefresh,
    handleLimitChange,
    setSearchQuery,
    setSelectedGame,
    setSelectedRarity,
    setSelectedSet,
    setMinPrice,
    setMaxPrice,
    setVerifiedOnly,
    setCards,
    setPagination,
    setHasMore,
    setFilters
  };
}