// === WORD STORM GAME ===
// Game where words fall from the sky like meteorites!

class WordStormGame {
    constructor(options) {
        logSh('Word Storm constructor called', 'DEBUG');

        this.container = options.container;
        this.content = options.content;
        this.onScoreUpdate = options.onScoreUpdate || (() => {});
        this.onGameEnd = options.onGameEnd || (() => {});

        // Inject game-specific CSS
        this.injectCSS();

        logSh('Options processed, initializing game state...', 'DEBUG');

        // Game state
        this.score = 0;
        this.level = 1;
        this.lives = 3;
        this.combo = 0;
        this.isGamePaused = false;
        this.isGameOver = false;

        // Game mechanics
        this.fallingWords = [];
        this.gameInterval = null;
        this.spawnInterval = null;
        this.currentWordIndex = 0;

        // Game settings
        this.fallSpeed = 8000; // ms to fall from top to bottom (very slow)
        this.spawnRate = 4000; // ms between spawns (not frequent)
        this.wordLifetime = 15000; // ms before word disappears (long time)

        logSh('Game state initialized, extracting vocabulary...', 'DEBUG');

        // Content extraction
        try {
            this.vocabulary = this.extractVocabulary(this.content);
            this.shuffledVocab = [...this.vocabulary];
            this.shuffleArray(this.shuffledVocab);

            logSh(`Word Storm initialized with ${this.vocabulary.length} words`, 'INFO');
        } catch (error) {
            logSh(`Error extracting vocabulary: ${error.message}`, 'ERROR');
            throw error;
        }

        logSh('Calling init()...', 'DEBUG');
        this.init();
    }

    injectCSS() {
        // Avoid injecting CSS multiple times
        if (document.getElementById('word-storm-styles')) return;

        const styleSheet = document.createElement('style');
        styleSheet.id = 'word-storm-styles';
        styleSheet.textContent = `
            .falling-word {
                position: absolute;
                background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                color: white;
                padding: 20px 30px;
                border-radius: 25px;
                font-size: 2rem;
                font-weight: 600;
                text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
                box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3), 0 0 20px rgba(102, 126, 234, 0.4);
                cursor: default;
                user-select: none;
                transform: translateX(-50%);
                animation: wordGlow 2s ease-in-out infinite;
            }

            .falling-word.exploding {
                animation: explode 0.6s ease-out forwards;
            }

            @keyframes wordGlow {
                0%, 100% { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3), 0 0 20px rgba(102, 126, 234, 0.4); }
                50% { box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3), 0 0 30px rgba(102, 126, 234, 0.6); }
            }

            @keyframes explode {
                0% { transform: translateX(-50%) scale(1); opacity: 1; }
                50% { transform: translateX(-50%) scale(1.2); opacity: 0.8; }
                100% { transform: translateX(-50%) scale(0.3); opacity: 0; }
            }

            @media (max-width: 768px) {
                .falling-word {
                    padding: 18px 25px;
                    font-size: 1.8rem;
                }
            }

            @media (max-width: 480px) {
                .falling-word {
                    font-size: 1.5rem;
                    padding: 15px 20px;
                }
            }
        `;

        document.head.appendChild(styleSheet);
        logSh('Word Storm CSS injected', 'DEBUG');
    }

    extractVocabulary(content) {
        let vocabulary = [];

        logSh(`Word Storm extracting vocabulary from content`, 'DEBUG');

        // Support Dragon's Pearl and other formats
        if (content.vocabulary && typeof content.vocabulary === 'object') {
            vocabulary = Object.entries(content.vocabulary).map(([original, vocabData]) => {
                if (typeof vocabData === 'string') {
                    return {
                        original: original,
                        translation: vocabData
                    };
                } else if (typeof vocabData === 'object') {
                    return {
                        original: original,
                        translation: vocabData.user_language || vocabData.translation || 'No translation',
                        pronunciation: vocabData.pronunciation
                    };
                }
                return null;
            }).filter(item => item !== null);

            logSh(`Extracted ${vocabulary.length} words from content.vocabulary`, 'DEBUG');
        }

        // Support rawContent format
        if (content.rawContent && content.rawContent.vocabulary) {
            const rawVocab = Object.entries(content.rawContent.vocabulary).map(([original, vocabData]) => {
                if (typeof vocabData === 'string') {
                    return { original: original, translation: vocabData };
                } else if (typeof vocabData === 'object') {
                    return {
                        original: original,
                        translation: vocabData.user_language || vocabData.translation,
                        pronunciation: vocabData.pronunciation
                    };
                }
                return null;
            }).filter(item => item !== null);

            vocabulary = vocabulary.concat(rawVocab);
            logSh(`Added ${rawVocab.length} words from rawContent.vocabulary, total: ${vocabulary.length}`, 'DEBUG');
        }

        // Limit to 50 words max for performance
        return vocabulary.slice(0, 50);
    }

    init() {
        if (this.vocabulary.length === 0) {
            this.showNoVocabularyMessage();
            return;
        }

        this.container.innerHTML = `
            <div class="game-wrapper compact">
                <div class="game-hud">
                    <div class="hud-left">
                        <div class="score">Score: <span id="score">0</span></div>
                        <div class="level">Level: <span id="level">1</span></div>
                    </div>
                    <div class="hud-center">
                        <div class="lives">Lives: <span id="lives">3</span></div>
                        <div class="combo">Combo: <span id="combo">0</span></div>
                    </div>
                    <div class="hud-right">
                        <button class="pause-btn" id="pause-btn">⏸️ Pause</button>
                    </div>
                </div>

                <div class="game-area" id="game-area" style="position: relative; height: 80vh; background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%); overflow: hidden;">
                </div>

                <div class="answer-panel" id="answer-panel">
                    <div class="answer-buttons" id="answer-buttons">
                        <!-- Dynamic answer buttons -->
                    </div>
                </div>
            </div>
        `;

        this.setupEventListeners();
        this.generateAnswerOptions();
    }

    setupEventListeners() {
        const pauseBtn = document.getElementById('pause-btn');
        if (pauseBtn) {
            pauseBtn.addEventListener('click', () => this.togglePause());
        }

        // Answer button clicks
        document.addEventListener('click', (e) => {
            if (e.target.classList.contains('answer-btn')) {
                const answer = e.target.textContent;
                this.checkAnswer(answer);
            }
        });

        // Keyboard support
        document.addEventListener('keydown', (e) => {
            if (e.key >= '1' && e.key <= '4') {
                const btnIndex = parseInt(e.key) - 1;
                const buttons = document.querySelectorAll('.answer-btn');
                if (buttons[btnIndex]) {
                    buttons[btnIndex].click();
                }
            }
        });
    }

    start() {
        logSh('Word Storm game started', 'INFO');
        this.startSpawning();
    }

    startSpawning() {
        this.spawnInterval = setInterval(() => {
            if (!this.isGamePaused && !this.isGameOver) {
                this.spawnFallingWord();
            }
        }, this.spawnRate);
    }

    spawnFallingWord() {
        if (this.vocabulary.length === 0) return;

        const word = this.vocabulary[this.currentWordIndex % this.vocabulary.length];
        this.currentWordIndex++;

        const gameArea = document.getElementById('game-area');
        const wordElement = document.createElement('div');
        wordElement.className = 'falling-word';
        wordElement.textContent = word.original;
        wordElement.style.left = Math.random() * 80 + 10 + '%';
        wordElement.style.top = '-60px';

        gameArea.appendChild(wordElement);

        this.fallingWords.push({
            element: wordElement,
            word: word,
            startTime: Date.now()
        });

        // Generate new answer options when word spawns
        this.generateAnswerOptions();

        // Animate falling
        this.animateFalling(wordElement);

        // Remove after lifetime
        setTimeout(() => {
            if (wordElement.parentNode) {
                this.missWord(wordElement);
            }
        }, this.wordLifetime);
    }

    animateFalling(wordElement) {
        wordElement.style.transition = `top ${this.fallSpeed}ms linear`;
        setTimeout(() => {
            wordElement.style.top = '100vh';
        }, 50);
    }

    generateAnswerOptions() {
        if (this.vocabulary.length === 0) return;

        const buttons = [];
        const correctWord = this.fallingWords.length > 0 ?
            this.fallingWords[this.fallingWords.length - 1].word :
            this.vocabulary[0];

        // Add correct answer
        buttons.push(correctWord.translation);

        // Add 3 random incorrect answers
        while (buttons.length < 4) {
            const randomWord = this.vocabulary[Math.floor(Math.random() * this.vocabulary.length)];
            if (!buttons.includes(randomWord.translation)) {
                buttons.push(randomWord.translation);
            }
        }

        // Shuffle buttons
        this.shuffleArray(buttons);

        // Update answer panel
        const answerButtons = document.getElementById('answer-buttons');
        if (answerButtons) {
            answerButtons.innerHTML = buttons.map(answer =>
                `<button class="answer-btn">${answer}</button>`
            ).join('');
        }
    }

    checkAnswer(selectedAnswer) {
        const activeFallingWords = this.fallingWords.filter(fw => fw.element.parentNode);

        for (let i = 0; i < activeFallingWords.length; i++) {
            const fallingWord = activeFallingWords[i];
            if (fallingWord.word.translation === selectedAnswer) {
                this.correctAnswer(fallingWord);
                return;
            }
        }

        // Wrong answer
        this.wrongAnswer();
    }

    correctAnswer(fallingWord) {
        // Remove from game
        if (fallingWord.element.parentNode) {
            fallingWord.element.classList.add('exploding');
            setTimeout(() => {
                if (fallingWord.element.parentNode) {
                    fallingWord.element.remove();
                }
            }, 600);
        }

        // Remove from tracking
        this.fallingWords = this.fallingWords.filter(fw => fw !== fallingWord);

        // Update score
        this.combo++;
        const points = 10 + (this.combo * 2);
        this.score += points;
        this.onScoreUpdate(this.score);

        // Update display
        document.getElementById('score').textContent = this.score;
        document.getElementById('combo').textContent = this.combo;

        // Level up check
        if (this.score > 0 && this.score % 100 === 0) {
            this.levelUp();
        }
    }

    wrongAnswer() {
        this.combo = 0;
        document.getElementById('combo').textContent = this.combo;

        // Flash effect
        const answerPanel = document.getElementById('answer-panel');
        if (answerPanel) {
            answerPanel.style.background = 'rgba(239, 68, 68, 0.3)';
            setTimeout(() => {
                answerPanel.style.background = '';
            }, 300);
        }
    }

    missWord(wordElement) {
        // Remove word
        if (wordElement.parentNode) {
            wordElement.remove();
        }

        // Remove from tracking
        this.fallingWords = this.fallingWords.filter(fw => fw.element !== wordElement);

        // Lose life
        this.lives--;
        this.combo = 0;

        document.getElementById('lives').textContent = this.lives;
        document.getElementById('combo').textContent = this.combo;

        if (this.lives <= 0) {
            this.gameOver();
        }
    }

    levelUp() {
        this.level++;
        document.getElementById('level').textContent = this.level;

        // Increase difficulty
        this.fallSpeed = Math.max(1000, this.fallSpeed * 0.9);
        this.spawnRate = Math.max(800, this.spawnRate * 0.95);

        // Restart intervals with new timing
        if (this.spawnInterval) {
            clearInterval(this.spawnInterval);
            this.startSpawning();
        }

        // Show level up message
        const gameArea = document.getElementById('game-area');
        const levelUpMsg = document.createElement('div');
        levelUpMsg.innerHTML = `
            <div style="position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
                        background: rgba(0,0,0,0.8); color: white; padding: 20px; border-radius: 10px;
                        text-align: center; z-index: 1000;">
                <h2>⚡ LEVEL UP! ⚡</h2>
                <p>Level ${this.level}</p>
            </div>
        `;
        gameArea.appendChild(levelUpMsg);

        setTimeout(() => {
            if (levelUpMsg.parentNode) {
                levelUpMsg.remove();
            }
        }, 2000);
    }

    togglePause() {
        this.isGamePaused = !this.isGamePaused;
        const pauseBtn = document.getElementById('pause-btn');
        if (pauseBtn) {
            pauseBtn.textContent = this.isGamePaused ? '▶️ Resume' : '⏸️ Pause';
        }
    }

    gameOver() {
        this.isGameOver = true;

        // Clear intervals
        if (this.spawnInterval) {
            clearInterval(this.spawnInterval);
        }

        // Clear falling words
        this.fallingWords.forEach(fw => {
            if (fw.element.parentNode) {
                fw.element.remove();
            }
        });

        this.onGameEnd(this.score);
    }

    showNoVocabularyMessage() {
        this.container.innerHTML = `
            <div class="game-error">
                <div class="error-content">
                    <h2>🌪️ Word Storm</h2>
                    <p>❌ No vocabulary found in this content.</p>
                    <p>This game requires content with vocabulary words.</p>
                    <button class="back-btn" onclick="window.history.back()">← Back to Games</button>
                </div>
            </div>
        `;
    }

    shuffleArray(array) {
        for (let i = array.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [array[i], array[j]] = [array[j], array[i]];
        }
    }

    destroy() {
        if (this.spawnInterval) {
            clearInterval(this.spawnInterval);
        }

        // Remove CSS
        const styleSheet = document.getElementById('word-storm-styles');
        if (styleSheet) {
            styleSheet.remove();
        }

        logSh('Word Storm destroyed', 'INFO');
    }
}

// Export to global namespace
window.GameModules = window.GameModules || {};
window.GameModules.WordStorm = WordStormGame;