import React, { useState, useEffect } from 'react';
import Papa from 'papaparse';
import cardsCsvRaw from '../data/cards.csv?raw';
import { BookOpen, HandCoins, Droplet, Eye, Shield, Building2, EyeOff } from 'lucide-react';
import SwipeCard from './SwipeCard';
import './GameScreen.css';

export function GameScreen() {
  const [params, setParams] = useState({ resistance: 0, entropy: 0, risk: 0 });
  const [tokens, setTokens] = useState({ budget: 50, personnel: 50, info: 50 });
  const [tags, setTags] = useState({ wealth: 0, force: 0, surveillance: 0 });
  const [narrativeTags, setNarrativeTags] = useState(0);
  const [phase, setPhase] = useState(1);
  const [gameOver, setGameOver] = useState(false);
  const [cards, setCards] = useState([]);
  const [currentCardIndex, setCurrentCardIndex] = useState(0);

  // CSV Load Effect
  useEffect(() => {
    const parsed = Papa.parse(cardsCsvRaw, { header: true, dynamicTyping: true, skipEmptyLines: true });
    
    const formattedCards = parsed.data.map(row => ({
      id: row.id,
      type: row.type,
      text: row.text,
      flavor: row.flavor,
      left: {
        text: row.left_text,
        stats: {
          res: row.left_res || 0,
          ent: row.left_ent || 0,
          rsk: row.left_rsk || 0,
          bud: row.left_bud || 0,
          per: row.left_per || 0,
          inf: row.left_inf || 0,
          wea: row.left_wea || 0,
          for: row.left_for || 0,
          sur: row.left_sur || 0,
        },
        effect: () => {
          setParams(p => ({
            resistance: Math.max(0, p.resistance + (row.left_res || 0)),
            entropy: Math.max(0, p.entropy + (row.left_ent || 0)),
            risk: Math.max(0, p.risk + (row.left_rsk || 0)),
          }));
          setTokens(t => ({
            budget: t.budget + (row.left_bud || 0),
            personnel: t.personnel + (row.left_per || 0),
            info: t.info + (row.left_inf || 0),
          }));
          setTags(tg => ({
            wealth: tg.wealth + (row.left_wea || 0),
            force: tg.force + (row.left_for || 0),
            surveillance: tg.surveillance + (row.left_sur || 0),
          }));
        }
      },
      right: {
        text: row.right_text,
        stats: {
          res: row.right_res || 0,
          ent: row.right_ent || 0,
          rsk: row.right_rsk || 0,
          bud: row.right_bud || 0,
          per: row.right_per || 0,
          inf: row.right_inf || 0,
          wea: row.right_wea || 0,
          for: row.right_for || 0,
          sur: row.right_sur || 0,
        },
        effect: () => {
          setParams(p => ({
            resistance: Math.max(0, p.resistance + (row.right_res || 0)),
            entropy: Math.max(0, p.entropy + (row.right_ent || 0)),
            risk: Math.max(0, p.risk + (row.right_rsk || 0)),
          }));
          setTokens(t => ({
            budget: t.budget + (row.right_bud || 0),
            personnel: t.personnel + (row.right_per || 0),
            info: t.info + (row.right_inf || 0),
          }));
          setTags(tg => ({
            wealth: tg.wealth + (row.right_wea || 0),
            force: tg.force + (row.right_for || 0),
            surveillance: tg.surveillance + (row.right_sur || 0),
          }));
        }
      }
    }));
    
    setCards(formattedCards.sort(() => Math.random() - 0.5));
  }, []);

  useEffect(() => {
    if (params.resistance >= 5 || params.entropy >= 5 || params.risk >= 5) {
      setGameOver(true);
    }
    if (narrativeTags >= 4 && narrativeTags < 8) setPhase(2);
    else if (narrativeTags >= 8) setPhase(3);
  }, [params, narrativeTags]);

  const handleSwipe = (direction) => {
    if (cards.length === 0) return;
    const card = cards[currentCardIndex % cards.length];
    if (direction === 'left' && card.left) {
      card.left.effect();
    } else if (direction === 'right' && card.right) {
      card.right.effect();
    }
    setNarrativeTags(n => n + 1);
    setCurrentCardIndex(idx => idx + 1);
  };

  const renderDots = (value, max = 5) => {
    return Array.from({ length: max }).map((_, i) => (
      <div key={i} className={`dot ${i < value ? 'filled' : 'empty'}`}></div>
    ));
  };

  if (gameOver) {
    return (
      <div className="game-over">
        <h1 className="glitch" data-text="시스템 붕괴">시스템 붕괴</h1>
        <p>프로젝트가 파멸을 맞이했습니다. 임무 실패.</p>
        <button className="restart-btn" onClick={() => window.location.reload()}>다음 회차 시작</button>
      </div>
    );
  }

  if (cards.length === 0) {
    return <div className="game-screen">데이터를 불러오는 중...</div>;
  }

  const phaseClass = phase === 1 ? 'phase-1' : phase === 2 ? 'phase-2' : 'phase-3';

  return (
    <div className={`game-screen ${phaseClass}`}>
      {/* Top Bar */}
      <div className="top-bar">
        <div className="narrative-badge">
          <BookOpen size={16} /> <span>{narrativeTags}/8</span>
        </div>
        <div className="parameters">
          <div className={`param ${params.resistance >= 4 ? 'critical' : ''}`} style={{'--param-color': 'var(--color-resistance-critical)'}}>
            <span className="icon">✊</span>
            <div className="dots">{renderDots(params.resistance)}</div>
          </div>
          <div className={`param ${params.entropy >= 4 ? 'critical' : ''}`} style={{'--param-color': 'var(--color-entropy-critical)'}}>
            <span className="icon">🌀</span>
            <div className="dots">{renderDots(params.entropy)}</div>
          </div>
          <div className={`param ${params.risk >= 4 ? 'critical' : ''}`} style={{'--param-color': 'var(--color-risk-critical)'}}>
            <span className="icon">⚠️</span>
            <div className="dots">{renderDots(params.risk)}</div>
          </div>
        </div>
      </div>

      {/* Card Area */}
      <div className="card-area">
        <SwipeCard 
          card={cards[currentCardIndex % cards.length]} 
          onSwipe={handleSwipe}
          phase={phase}
        />
      </div>

      {/* Bottom Inventory */}
      <div className="bottom-bar">
        <div className="tokens-row">
          <div className="token"><HandCoins size={16} color="var(--color-token-budget)" /> <span>{tokens.budget}</span></div>
          <div className="token"><Droplet size={16} color="var(--color-token-personnel)" /> <span>{tokens.personnel}</span></div>
          <div className="token"><Eye size={16} color="var(--color-token-info)" /> <span>{tokens.info}</span></div>
        </div>
        <div className="tags-row">
          <div className="tag"><Building2 size={14} /> <span>{tags.wealth}</span></div>
          <div className="tag"><Shield size={14} /> <span>{tags.force}</span></div>
          <div className="tag"><EyeOff size={14} /> <span>{tags.surveillance}</span></div>
        </div>
        <div className="asset-slots">
          <div className="asset-slot"></div>
          <div className="asset-slot"></div>
          <div className="asset-slot"></div>
          <div className="asset-slot"></div>
        </div>
      </div>
    </div>
  );
}