mnemo_cards/funny_letters/lib/runner/game_manager.dart

import 'dart:async';
import 'dart:math';
import 'dart:typed_data';
import 'dart:ui' as ui;

import 'package:audioplayers/audioplayers.dart';
import 'package:flame/components.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:funny_letters/main.dart';
import 'package:funny_letters/runner/bonuses/health_bonus.dart';
import 'package:funny_letters/runner/obstacles/obstacle.dart';
import 'package:funny_letters/runner/player.dart';
import 'package:funny_letters/runner/ui/back_button.dart';
import 'package:funny_letters/runner/ui/score_bar.dart';
import 'package:flame/input.dart';
import 'package:flame/events.dart';
import 'package:flame/text.dart' as flameText;
import 'package:flame/game.dart';
import 'package:flame/flame.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:funny_letters/runner/words.dart';
import 'package:funny_letters/gen/assets.gen.dart';

import 'bonuses/bonus.dart';
import 'bonuses/letter_bonus.dart';
import 'ui/health_bar_v2.dart';

enum Difficulty { easy, medium, hard }

enum Level { noun, verb, adverb, adjective }

Difficulty difficulty = Difficulty.hard;

String? background;
String target = '';
String targetTranslated = '';
String targetLetters = '';
String goText = '';

class GameManager extends FlameGame
    with KeyboardEvents, TapCallbacks, DragCallbacks, HasCollisionDetection {
  double get playerHorizontalSpeed =>
      switch (difficulty) {
        Difficulty.easy => size.x,
        Difficulty.medium => size.x,
        Difficulty.hard => size.x * 1.1,
      } *
      (1.0);

  double get playerVerticalSpeed =>
      switch (difficulty) {
        Difficulty.easy => size.y / 2,
        Difficulty.medium => size.y / 2 * 1.1,
        Difficulty.hard => size.y / 2 * 1.2,
      } *
      (1.0);

  @override
  void onDragUpdate(DragUpdateEvent event) {
    player.position.x += event.localDelta.x;
    print(player.position.x);
    if (player.position.x < player.size.x / 2) {
      player.position.x = player.size.x / 2;
    } else if (player.position.x + player.size.x / 2 >= size.x) {
      player.position.x = size.x - player.size.x / 2;
    }
  }

  double get hitRadiusSq => player.width * player.width / 2;

  double get playerWidth => size.x / 5;

  double get playerHeight => playerWidth;

  Vector2 get playerSize => Vector2(playerWidth, playerHeight);

  late Player player;
  LogicalKeyboardKey? pressedKey;
  List<Bonus> bonuses = [];
  List<Obstacle> obstacles = [];
  late HealthBarV2 healthBar;
  late BackButtonComponent backButton;
  late ScoreBar scoreBar;
  TextComponent? targetText;
  TextComponent? translatedText;
  TextComponent? scoreText;
  SpriteComponent? backgroundComponent;
  int score = 0;

  String _nextBonus() {
    final alphabet = 'abcdefghijklmnopqrstuvwxyz';
    List<String> letters = [
      ...targetLetters.characters,
      alphabet[Random().nextInt(alphabet.length)],
      alphabet[Random().nextInt(alphabet.length)],
      if (difficulty != Difficulty.easy)
        alphabet[Random().nextInt(alphabet.length)],
    ];

    return letters[Random().nextInt(letters.length)];
  }

  Future<void> _updateNextWord() async {
    final cache = await words;
    final next = cache[Random().nextInt(cache.length)];
    // Check if there's a custom background for this word
    final customBg = await assetLoader.getCustomBackground(next);
    background = customBg;
    if (background != null) {
      updateBackground();
    }
    assetLoader.playWord(next, lang: 'es');
    target = next;
    targetTranslated = await translate(target);
    targetLetters = target.replaceAll(' ', '');
  }

  Future<void> _init() async {
    score = 0;
    player = Player(Vector2(playerWidth, playerHeight * 0.25));
    player.y = size.y - playerHeight;
    player.x = size.x / 2;
    healthBar = HealthBarV2(
      health: player.health,
      size: Vector2(size.x * 0.4, playerHeight * 0.3),
      position: Vector2(38, 40),
    );
    backButton = BackButtonComponent(
      size: Vector2(20, 27),
      position: Vector2(8, 40),
      onPressed: () => Navigator.of(menuKey.currentContext!).pop(),
    );
    scoreBar = ScoreBar(playerSize, tag: 'score')
      ..y = 200
      ..anchor = Anchor.centerLeft
      ..x = size.x / 2;
    await _updateNextWord();
  }

  Future<void> updateBackground() async {
    if (backgroundComponent != null) {
      backgroundComponent?.removeFromParent();
    }
    if (background != null) {
      try {
        final bytes = await assetLoader.loadFileBytes(background!);
        final codec = await ui.instantiateImageCodec(bytes);
        final frame = await codec.getNextFrame();
        Flame.images.add(background!, frame.image);
        final sprite = await loadSprite(background!);
        backgroundComponent = SpriteComponent(
          sprite: sprite,
          anchor: Anchor.center,
          position: size / 2,
          size: Vector2(size.x, size.x),
        )
          ..opacity = 0.5
          ..priority = -1;

        await add(backgroundComponent!);
      } catch (e) {
        print('Error loading background: $e');
      }
    }
  }

  @override
  void resumeEngine() {
    // target = _nextWord();
    // targetLetters = target.replaceAll(' ', '');
    // updateTargetText();
    // updateBackground();
    super.resumeEngine();
  }

  void updateTargetText(BuildContext context) {
    if (targetText != null) {
      remove(targetText!);
      remove(translatedText!);
      remove(scoreText!);
    }
    final theme = Theme.of(context);
    final paint = TextPaint(style: theme.textTheme.titleLarge!);
    targetText = TextComponent(
      text: target.toUpperCase(),
      textRenderer: paint,
    )
      ..y = 100
      ..anchor = Anchor.center
      ..x = size.x / 2;
    translatedText = TextComponent(
      text: targetTranslated.toUpperCase(),
      textRenderer: paint,
    )
      ..y = 150
      ..anchor = Anchor.center
      ..x = size.x / 2;
    scoreText = TextComponent(
      text: score.toString(),
      textRenderer: paint,
    )
      ..y = playerHeight
      ..anchor = Anchor.centerRight
      ..x = size.x - 10;
    add(targetText!);
    add(translatedText!);
    add(scoreText!);
  }

  void dispose() {
    if (backgroundComponent != null) {
      remove(backgroundComponent!);
      backgroundComponent = null;
    }
    remove(player);
    removeAll(bonuses);
    removeAll(obstacles);
    remove(healthBar);
    remove(backButton);
    remove(scoreBar);
    if (targetText != null) remove(targetText!);
    if (scoreText != null) remove(scoreText!);
    bonuses.clear();
    obstacles.clear();
  }

  double spawnTime = 0.0;

  void gameOver() {
    goText = target;
    dispose();
    onLoad();
    pauseEngine();
    if (gameSettings.soundEnabled) {
      effectPlayer.stop().then((value) async {
        audioPlayer.pause();
        // Play game over sound through the main app
        await assetLoader.playWord('game_over');
        audioPlayer.resume();
      });
    }
    (menuKey.currentState as MenuState).openGameOver();
  }

  @override
  void update(double dt) {
    super.update(dt);

    if (player.health <= 0) {
      gameOver();
      return;
    }

    int bonusLength;
    switch (difficulty) {
      case Difficulty.easy:
        bonusLength = 7;
      case Difficulty.medium:
        bonusLength = 8;
      case Difficulty.hard:
        bonusLength = 9;
    }

    spawnTime += dt;
    double spawnCooldown;
    switch (difficulty) {
      case Difficulty.easy:
        spawnCooldown = playerVerticalSpeed / size.y / 1.3;
      case Difficulty.medium:
        spawnCooldown = playerVerticalSpeed / size.y / 1.6;
      case Difficulty.hard:
        spawnCooldown = playerVerticalSpeed / size.y / 2;
    }

    if (bonuses.length < bonusLength && spawnTime > spawnCooldown) {
      spawnTime = 0;
      Bonus bonus;
      final r = Random().nextInt(8);
      if (r == 0) {
        bonus = HealthBonus(playerSize * 0.8)
          ..x = Random().nextDouble() * (size.x - playerWidth) + playerWidth / 2
          ..y = -(Random().nextDouble() + 1) * playerSize.y;
      } else {
        bonus = LetterBonus(playerSize * 0.8, _nextBonus())
          ..x = Random().nextDouble() * (size.x - playerWidth) + playerWidth / 2
          ..y = -(Random().nextDouble() * 2 + 1) * playerSize.y;
      }
      bonuses.add(bonus);
      add(bonus);
    }

    if (obstacles.length < 3) {
      // for (int i = 0; i < Random().nextInt(3 - obstacles.length); i++) {
      //   final moon = Obstacle(playerSize)
      //     ..x = Random().nextDouble() * (size.x - playerWidth) + playerWidth / 2
      //     ..y = 0;
      //   obstacles.add(moon);
      //   add(moon);
      // }
    }

    if (pressedKey == LogicalKeyboardKey.arrowLeft) {
      player.x -= dt * playerHorizontalSpeed;
      if (player.x < player.width / 2) {
        player.x = player.width / 2;
      }
    } else if (pressedKey == LogicalKeyboardKey.arrowRight) {
      player.x += dt * playerHorizontalSpeed;
      if (player.x > size.x - player.width / 2) {
        player.x = size.x - player.width / 2;
      }
    }

    List<Bonus> bonusesToRemove = [];
    bonuses.where((bonus) => !bonus.activated).forEach((bonus) {
      bonus.y += dt * playerVerticalSpeed;
      if (bonus.y > size.y + bonus.height) {
        bonusesToRemove.add(bonus);
      } else {
        if (bonus.collidingWith(player)) {
          bonus.activate(player);
          if (bonus is HealthBonus) {
            effectPlayer.stop().then((value) async {
              if (gameSettings.soundEnabled) {
                await assetLoader.playWord('health_bonus');
              }
            });
            healthBar.updateHealth(player);
          } else if (bonus is LetterBonus) {
            if (gameSettings.soundEnabled) {
              effectPlayer.stop().then((value) async {
                await assetLoader.playWord('letter_bonus');
              });
            }
            if (bonus.letter != targetLetters[scoreBar.score.length]) {
              player.hit();
              healthBar.updateHealth(player);
              bonusesToRemove.add(bonus);
              return;
            }
            scoreBar.addScore(bonus.letter, targetLetters.length, target);
            if (scoreBar.score.length == targetLetters.length) {
              bool same = true;
              for (int i = 0; i < targetLetters.length; i++) {
                if (scoreBar.score[i] != targetLetters[i]) {
                  same = false;
                  break;
                }
              }
              if (same) {
                score++;
                scoreBar.updateScore([], target);
                _updateNextWord();
                updateTargetText(buildContext!);
              }
            }
          }
          bonusesToRemove.add(bonus);
        }
      }
    });
    for (var bonus in bonusesToRemove) {
      // Not hitting player for missed letters
      if (bonus is LetterBonus &&
          bonus.letter == targetLetters[scoreBar.score.length] &&
          false) {
        player.hit();
        healthBar.updateHealth(player);
      }
      bonuses.remove(bonus);
      remove(bonus);
    }

    List<Obstacle> obstaclesToRemove = [];
    for (var obstacle in obstacles) {
      if (obstacle.isHit) {
        continue;
      }
      obstacle.y += dt * playerVerticalSpeed;
      if (obstacle.y > size.y + obstacle.height) {
        obstaclesToRemove.add(obstacle);
      } else {
        if (obstacle.collidingWith(player)) {
          obstacle.hit(player);
          healthBar.updateHealth(player);
          obstaclesToRemove.add(obstacle);
        }
      }
    }
    for (var element in obstaclesToRemove) {
      obstacles.remove(element);
      remove(element);
    }

    scoreBar.updateIfNeeded();
  }

  @override
  FutureOr<void> onLoad() async {
    await super.onLoad();
    await _init();
    add(player);
    add(backButton);
    addAll(bonuses);
    addAll(obstacles);
    add(healthBar);
    add(scoreBar);
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (buildContext != null) {
        updateTargetText(buildContext!);
      }
    });
    // await updateBackground();
  }

  @override
  KeyEventResult onKeyEvent(
    KeyEvent event,
    Set<LogicalKeyboardKey> keysPressed,
  ) {
    if (event is RawKeyDownEvent) {
      pressedKey = event.logicalKey;
    } else if (event is RawKeyUpEvent) {
      pressedKey = null;
    }
    return KeyEventResult.handled;
  }
}