import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'maze.dart';
import 'player.dart';
import 'raycaster.dart';

void main() {
  runApp(const LabiryntApp());
}

class LabiryntApp extends StatelessWidget {
  const LabiryntApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Labirynt 3D',
      theme: ThemeData.dark(),
      home: const GameScreen(),
    );
  }
}

class GameScreen extends StatefulWidget {
  const GameScreen({super.key});

  @override
  State<GameScreen> createState() => _GameScreenState();
}

class _GameScreenState extends State<GameScreen> with SingleTickerProviderStateMixin {
  late Maze maze;
  late Player player;
  late AnimationController _controller;
  final Set<LogicalKeyboardKey> _pressedKeys = {};
  bool _won = false;
  int _mazeSize = 15;

  @override
  void initState() {
    super.initState();
    _initGame();
    _controller = AnimationController(
      vsync: this,
      duration: const Duration(seconds: 1),
    )..addListener(_gameLoop);
    _controller.repeat();
  }

  void _initGame() {
    if (_mazeSize.isEven) _mazeSize++;
    maze = Maze(_mazeSize, _mazeSize);
    player = Player(x: 1.5, y: 1.5);
    _won = false;
  }

  void _gameLoop() {
    if (_won) return;

    setState(() {
      if (_pressedKeys.contains(LogicalKeyboardKey.keyW) ||
          _pressedKeys.contains(LogicalKeyboardKey.arrowUp)) {
        player.moveForward(maze);
      }
      if (_pressedKeys.contains(LogicalKeyboardKey.keyS) ||
          _pressedKeys.contains(LogicalKeyboardKey.arrowDown)) {
        player.moveBackward(maze);
      }
      if (_pressedKeys.contains(LogicalKeyboardKey.keyA)) {
        player.strafeLeft(maze);
      }
      if (_pressedKeys.contains(LogicalKeyboardKey.keyD)) {
        player.strafeRight(maze);
      }
      if (_pressedKeys.contains(LogicalKeyboardKey.arrowLeft)) {
        player.rotateLeft();
      }
      if (_pressedKeys.contains(LogicalKeyboardKey.arrowRight)) {
        player.rotateRight();
      }

      if (maze.isGoal(player.x, player.y)) {
        _won = true;
      }
    });
  }

  void _newGame() {
    setState(() {
      _mazeSize += 2;
      if (_mazeSize > 31) _mazeSize = 15;
      _initGame();
    });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: KeyboardListener(
        focusNode: FocusNode()..requestFocus(),
        autofocus: true,
        onKeyEvent: (event) {
          if (event is KeyDownEvent) {
            _pressedKeys.add(event.logicalKey);
          } else if (event is KeyUpEvent) {
            _pressedKeys.remove(event.logicalKey);
          }
        },
        child: Stack(
          children: [
            CustomPaint(
              painter: RaycasterPainter(maze: maze, player: player),
              size: Size.infinite,
            ),
            Positioned(
              bottom: 16,
              left: 16,
              child: Container(
                padding: const EdgeInsets.all(12),
                decoration: BoxDecoration(
                  color: Colors.black54,
                  borderRadius: BorderRadius.circular(8),
                ),
                child: const Text(
                  'WASD / Strzalki — ruch\nCel: zielony punkt na mapie',
                  style: TextStyle(color: Colors.white70, fontSize: 14),
                ),
              ),
            ),
            Positioned(
              bottom: 16,
              right: 16,
              child: Column(
                children: [
                  _controlButton(Icons.arrow_upward, () => player.moveForward(maze)),
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      _controlButton(Icons.rotate_left, () => player.rotateLeft()),
                      const SizedBox(width: 8),
                      _controlButton(Icons.rotate_right, () => player.rotateRight()),
                    ],
                  ),
                  _controlButton(Icons.arrow_downward, () => player.moveBackward(maze)),
                ],
              ),
            ),
            if (_won)
              Container(
                color: Colors.black87,
                child: Center(
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      const Text(
                        'WYGRANA!',
                        style: TextStyle(
                          color: Colors.greenAccent,
                          fontSize: 64,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 24),
                      Text(
                        'Labirynt ${_mazeSize}x$_mazeSize ukonczony',
                        style: const TextStyle(color: Colors.white70, fontSize: 24),
                      ),
                      const SizedBox(height: 32),
                      ElevatedButton(
                        onPressed: _newGame,
                        style: ElevatedButton.styleFrom(
                          padding: const EdgeInsets.symmetric(horizontal: 32, vertical: 16),
                        ),
                        child: const Text('Nastepny poziom', style: TextStyle(fontSize: 20)),
                      ),
                    ],
                  ),
                ),
              ),
          ],
        ),
      ),
    );
  }

  Widget _controlButton(IconData icon, VoidCallback onPressed) {
    return Padding(
      padding: const EdgeInsets.all(2),
      child: GestureDetector(
        onTapDown: (_) => setState(onPressed),
        child: Container(
          width: 56,
          height: 56,
          decoration: BoxDecoration(
            color: Colors.white24,
            borderRadius: BorderRadius.circular(12),
          ),
          child: Icon(icon, color: Colors.white70, size: 28),
        ),
      ),
    );
  }
}