import React, { useState, useEffect, useCallback } from 'react';
import { Pacman, Ghost, Bonus } from '../../utils/entities';
import { mazeVariants } from '../../utils/mazeData';
import { fillEmptySpaces, randomizeMaze, getBonusPositions, countDots } from '../../utils/gameLogic';
import GameCanvas from '../GameCanvas/GameCanvas';
import GameInfo from '../GameInfo/GameInfo';
import UserInput from '../UserInput/UserInput';
import Leaderboard from '../Leaderboard/Leaderboard';
import { useGameState } from '../../hooks/useGameState';
import { useKeyboard } from '../../hooks/useKeyboard';
import { useLeaderboard } from '../../hooks/useLeaderboard';
import { saveScore } from '../../utils/leaderboard';

function Game() {
    const gameState = useGameState();
    const { scores, addScore: addLeaderboardScore } = useLeaderboard();
    const [username, setUsername] = useState('');
    const [maze, setMaze] = useState([]);
    const [pacman, setPacman] = useState(null);
    const [ghosts, setGhosts] = useState([]);
    const [bonuses, setBonuses] = useState([]);

    const initializeGame = useCallback(() => {
        const initialMaze = mazeVariants[0].map(row => [...row]);
        fillEmptySpaces(initialMaze);
        randomizeMaze(initialMaze);
        setMaze(initialMaze);

        const newPacman = new Pacman();
        newPacman.speed = newPacman.baseSpeed * (1 + (gameState.level - 1) * 0.05);
        setPacman(newPacman);

        const newGhosts = [
            new Ghost(14, 11, '#ff0000'),
            new Ghost(15, 11, '#ff00ff'),
            new Ghost(14, 12, '#00ffff'),
            new Ghost(15, 12, '#ffa500')
        ];
        newGhosts.forEach(ghost => ghost.updateSpeed(gameState.level));
        setGhosts(newGhosts);

        const bonusPositions = getBonusPositions();
        const newBonuses = [];
        const mazeCopy = initialMaze.map(row => [...row]);
        for (let pos of bonusPositions) {
            if (mazeCopy[pos.y][pos.x] === 0 || mazeCopy[pos.y][pos.x] === 2) {
                mazeCopy[pos.y][pos.x] = pos.type;
                newBonuses.push(new Bonus(pos.x, pos.y, pos.type));
            }
        }
        setBonuses(newBonuses);
        setMaze(mazeCopy);
    }, [gameState.level]);

    useEffect(() => {
        initializeGame();
        gameState.resetGame();
    }, []);

    const handleCollect = useCallback((type, points) => {
        gameState.addScore(points);
        
        if (type === 'cherry') {
            const newCherriesEaten = gameState.cherriesEaten + 1;
            gameState.setCherriesEaten(newCherriesEaten);
            gameState.setCherryEatenRecently(true);
            gameState.setCherryEatenTimer(Math.max(150, 300 - (gameState.level - 1) * 20));
        }
    }, [gameState]);

    const handleCollision = useCallback(() => {
        const newLives = gameState.lives - 1;
        gameState.setLives(newLives);
        
        if (newLives <= 0) {
            gameState.setGameRunning(false);
            gameState.setStatus('Game Over !');
            if (username.trim() !== '') {
                saveScore(username, gameState.score);
                addLeaderboardScore(username, gameState.score);
            }
        } else {
            gameState.restartLevel();
            setTimeout(() => {
                initializeGame();
                gameState.setIsChangingLevel(false);
                gameState.setGameRunning(true);
                gameState.setStatus('En jeu');
            }, 2000);
        }
    }, [gameState, username, initializeGame, addLeaderboardScore]);

    const handleNextLevel = useCallback(() => {
        const newLevel = gameState.level + 1;
        gameState.setLevel(newLevel);
        gameState.setCherriesEaten(0);
        gameState.setIsChangingLevel(true);
        gameState.setCherryEatenRecently(false);
        gameState.setCherryEatenTimer(0);
        
        setTimeout(() => {
            const mazeIndex = (newLevel - 1) % mazeVariants.length;
            const newMaze = mazeVariants[mazeIndex].map(row => [...row]);
            fillEmptySpaces(newMaze);
            randomizeMaze(newMaze);
            setMaze(newMaze);

            const newPacman = new Pacman();
            newPacman.speed = newPacman.baseSpeed * (1 + (newLevel - 1) * 0.05);
            setPacman(newPacman);

            const newGhosts = [
                new Ghost(14, 11, '#ff0000'),
                new Ghost(15, 11, '#ff00ff'),
                new Ghost(14, 12, '#00ffff'),
                new Ghost(15, 12, '#ffa500')
            ];
            newGhosts.forEach(ghost => ghost.updateSpeed(newLevel));
            setGhosts(newGhosts);

            const bonusPositions = getBonusPositions();
            const newBonuses = [];
            const mazeCopy = newMaze.map(row => [...row]);
            for (let pos of bonusPositions) {
                if (mazeCopy[pos.y][pos.x] === 0 || mazeCopy[pos.y][pos.x] === 2) {
                    mazeCopy[pos.y][pos.x] = pos.type;
                    newBonuses.push(new Bonus(pos.x, pos.y, pos.type));
                }
            }
            setBonuses(newBonuses);
            setMaze(mazeCopy);

            gameState.setIsChangingLevel(false);
            gameState.setGameRunning(true);
            gameState.setStatus('En jeu');
        }, 2000);
    }, [gameState]);

    const handleKeyPress = useCallback((key) => {
        if (!gameState.gameRunning || !pacman) return;

        switch(key) {
            case 'ArrowUp':
                pacman.nextDirection = 0;
                break;
            case 'ArrowRight':
                pacman.nextDirection = 1;
                break;
            case 'ArrowDown':
                pacman.nextDirection = 2;
                break;
            case 'ArrowLeft':
                pacman.nextDirection = 3;
                break;
            default:
                break;
        }
    }, [gameState.gameRunning, pacman]);

    useKeyboard(handleKeyPress);

    const handleRestart = useCallback(() => {
        initializeGame();
        gameState.resetGame();
    }, [initializeGame, gameState]);

    useEffect(() => {
        if (gameState.cherryEatenTimer > 0) {
            const timer = setInterval(() => {
                const newTimer = gameState.cherryEatenTimer - 1;
                if (newTimer <= 0) {
                    gameState.setCherryEatenRecently(false);
                    gameState.setCherryEatenTimer(0);
                } else {
                    gameState.setCherryEatenTimer(newTimer);
                }
            }, 16);
            return () => clearInterval(timer);
        }
    }, [gameState.cherryEatenTimer, gameState]);

    useEffect(() => {
        if (gameState.cherriesEaten >= 4 && !gameState.isChangingLevel && gameState.gameRunning) {
            handleNextLevel();
        }
    }, [gameState.cherriesEaten, gameState.isChangingLevel, gameState.gameRunning, handleNextLevel]);

    return (
        <div className="main-wrapper">
            <div className="container">
                <h1>OULVIC</h1>
                <UserInput username={username} onUsernameChange={setUsername} />
                <GameInfo
                    score={gameState.score}
                    level={gameState.level}
                    lives={gameState.lives}
                    status={gameState.status}
                />
                <GameCanvas
                    maze={maze}
                    pacman={pacman}
                    ghosts={ghosts}
                    bonuses={bonuses}
                    gameRunning={gameState.gameRunning}
                    isChangingLevel={gameState.isChangingLevel}
                    level={gameState.level}
                    cherryEatenRecently={gameState.cherryEatenRecently}
                    onCollect={handleCollect}
                    onCollision={handleCollision}
                />
                <div className="instructions">
                    <p>Utilisez les flèches directionnelles pour déplacer Oulvic</p>
                    {!gameState.gameRunning && (
                        <button id="restartBtn" onClick={handleRestart}>
                            Rejouer
                        </button>
                    )}
                </div>
            </div>
            <Leaderboard />
        </div>
    );
}

export default Game;