import { useState, useEffect } from 'react';

const EMPTY_FORM = {
  name: '',
  set_name: '',
  set_code: '',
  card_number: '',
  rarity: '',
  game: '',
  mana_cost: '',
  cmc: '',
  card_type: '',
  colors: [],
  oracle_text: '',
  power: '',
  toughness: '',
  image_url: '',
  stock_image_url: '',
  current_price: '',
  market_price: '',
};

/**
 * Admin card editor state and handlers (god-component split).
 */
export function useCardEditor(router) {
  const { id } = router.query;

  const [card, setCard] = useState(null);
  const [fetchLoading, setFetchLoading] = useState(false);
  const loading = id ? fetchLoading : false;
  const [saving, setSaving] = useState(false);
  const [message, setMessage] = useState('');
  const [searchQuery, setSearchQuery] = useState('');
  const [searchResults, setSearchResults] = useState([]);
  const [searchLoading, setSearchLoading] = useState(false);
  const [formData, setFormData] = useState(EMPTY_FORM);

  const fetchCard = async (cardId) => {
    setFetchLoading(true);
    try {
      const response = await fetch(`/api/cards/${cardId}`);
      if (response.ok) {
        const cardData = await response.json();
        setCard(cardData);
        setFormData({
          name: cardData.name || '',
          set_name: cardData.set_name || '',
          set_code: cardData.set_code || '',
          card_number: cardData.card_number || '',
          rarity: cardData.rarity || '',
          game: cardData.game || '',
          mana_cost: cardData.mana_cost || '',
          cmc: cardData.cmc || '',
          card_type: cardData.card_type || '',
          colors: Array.isArray(cardData.colors) ? cardData.colors : [],
          oracle_text: cardData.oracle_text || '',
          power: cardData.power || '',
          toughness: cardData.toughness || '',
          image_url: cardData.image_url || '',
          stock_image_url: cardData.stock_image_url || '',
          current_price: cardData.current_price || '',
          market_price: cardData.market_price || '',
        });
      } else {
        setMessage('Card not found');
      }
    } catch (error) {
      setMessage('Error loading card: ' + error.message);
    } finally {
      setFetchLoading(false);
    }
  };

  useEffect(() => {
    if (id) {
      // eslint-disable-next-line react-hooks/set-state-in-effect -- load card when route id is set
      fetchCard(id);
    }
  }, [id]);

  const searchCards = async (query) => {
    if (!query.trim()) {
      setSearchResults([]);
      return;
    }

    setSearchLoading(true);
    try {
      const response = await fetch(
        `/api/cards/search?query=${encodeURIComponent(query)}&limit=20`
      );
      if (response.ok) {
        const data = await response.json();
        setSearchResults(data.cards || []);
      }
    } catch (error) {
      console.error('Search error:', error);
    } finally {
      setSearchLoading(false);
    }
  };

  const handleInputChange = (field, value) => {
    setFormData((prev) => ({
      ...prev,
      [field]: value,
    }));
  };

  const handleColorChange = (color, checked) => {
    setFormData((prev) => ({
      ...prev,
      colors: checked
        ? [...prev.colors, color]
        : prev.colors.filter((c) => c !== color),
    }));
  };

  const handleSave = async () => {
    if (!card?.id) {
      setMessage('No card selected to edit');
      return;
    }

    setSaving(true);
    setMessage('');

    try {
      const response = await fetch(`/api/cards/${card.id}`, {
        method: 'PUT',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          ...formData,
          cmc: formData.cmc ? parseInt(formData.cmc, 10) : null,
          current_price: formData.current_price ? parseFloat(formData.current_price) : null,
          market_price: formData.market_price ? parseFloat(formData.market_price) : null,
        }),
      });

      if (response.ok) {
        const updatedCard = await response.json();
        setCard(updatedCard);
        setMessage('Card updated successfully!');
        setTimeout(() => setMessage(''), 3000);
      } else {
        const errorData = await response.json();
        setMessage('Error updating card: ' + (errorData.error || 'Unknown error'));
      }
    } catch (error) {
      setMessage('Error updating card: ' + error.message);
    } finally {
      setSaving(false);
    }
  };

  const selectCard = (selectedCard) => {
    router.push(`/admin/card-editor?id=${selectedCard.id}`);
  };

  const onSearchQueryChange = (value) => {
    setSearchQuery(value);
    searchCards(value);
  };

  return {
    card,
    formData,
    handleColorChange,
    handleInputChange,
    handleSave,
    loading,
    message,
    onSearchQueryChange,
    router,
    saving,
    searchLoading,
    searchQuery,
    searchResults,
    selectCard,
    showEmptyState: !card && !loading,
  };
}