import React, { useState, useCallback } from 'react';
import WorldMap from './WorldMap.jsx';
import PuzzleView from './PuzzleView.jsx';
import AdminPanel from './AdminPanel.jsx';
import { WORLD_1 } from './levels/world1.js';
import { WORLD_2 } from './levels/world2.js';
import { WORLD_3 } from './levels/world3.js';
import { WORLD_4 } from './levels/world4.js';
import { WORLD_5 } from './levels/world5.js';
import { WORLD_6 } from './levels/world6.js';
import { WORLD_7 } from './levels/world7.js';
import { WORLD_8 } from './levels/world8.js';
import { WORLD_9 } from './levels/world9.js';
import { WORLD_10 } from './levels/world10.js';
import { WORLD_11 } from './levels/world11.js';
import { WORLD_12 } from './levels/world12.js';

const allWorlds = [WORLD_1, WORLD_2, WORLD_3, WORLD_4, WORLD_5, WORLD_6, WORLD_7, WORLD_8, WORLD_9, WORLD_10, WORLD_11, WORLD_12];

export default function GameApp({ onSwitchToSandbox }) {
  const [view, setView] = useState('map');
  const [currentLevel, setCurrentLevel] = useState(null);
  const [currentLevelIndex, setCurrentLevelIndex] = useState(0);
  const [currentWorld, setCurrentWorld] = useState(null);
  const [showAdmin, setShowAdmin] = useState(false);

  const handleSelectLevel = useCallback((level, world) => {
    const idx = world.levels.findIndex(l => l.id === level.id);
    setCurrentLevel(level);
    setCurrentLevelIndex(idx);
    setCurrentWorld(world);
    setView('puzzle');
  }, []);

  const handleBack = useCallback(() => {
    setView('map');
    setCurrentLevel(null);
    setCurrentWorld(null);
  }, []);

  const handleNextLevel = useCallback(() => {
    if (!currentWorld) return;
    const nextIdx = currentLevelIndex + 1;
    if (nextIdx < currentWorld.levels.length) {
      setCurrentLevel(currentWorld.levels[nextIdx]);
      setCurrentLevelIndex(nextIdx);
    } else {
      // Move to next world's first level if unlocked
      const worldIdx = allWorlds.findIndex(w => w.id === currentWorld.id);
      if (worldIdx < allWorlds.length - 1) {
        const nextWorld = allWorlds[worldIdx + 1];
        setCurrentWorld(nextWorld);
        setCurrentLevel(nextWorld.levels[0]);
        setCurrentLevelIndex(0);
      } else {
        setView('map');
      }
    }
  }, [currentLevelIndex, currentWorld]);

  if (view === 'puzzle' && currentLevel && currentWorld) {
    return (
      <PuzzleView
        key={currentLevel.id}
        level={currentLevel}
        levelIndex={currentLevelIndex}
        worldLevels={currentWorld.levels}
        onBack={handleBack}
        onNextLevel={handleNextLevel}
      />
    );
  }

  return (
    <>
      <WorldMap
        onSelectLevel={handleSelectLevel}
        onSandbox={onSwitchToSandbox}
        onAdmin={() => setShowAdmin(true)}
      />
      {showAdmin && (
        <AdminPanel
          worlds={allWorlds}
          onClose={() => setShowAdmin(false)}
        />
      )}
    </>
  );
}