// === MODULE TEXT READER ===

class TextReaderGame {
    constructor(options) {
        this.container = options.container;
        this.content = options.content;
        this.onScoreUpdate = options.onScoreUpdate || (() => {});
        this.onGameEnd = options.onGameEnd || (() => {});
        
        // État du lecteur
        this.currentTextIndex = 0;
        this.currentSentenceIndex = 0;
        this.isRunning = false;
        
        // Données de lecture
        this.texts = this.extractTexts(this.content);
        this.currentText = null;
        this.sentences = [];
        this.showingFullText = false;
        
        this.init();
    }

    init() {
        // Vérifier que nous avons des textes
        if (!this.texts || this.texts.length === 0) {
            console.error('Aucun texte disponible pour Text Reader');
            this.showInitError();
            return;
        }
        
        this.createReaderInterface();
        this.setupEventListeners();
        this.loadText();
    }
    
    showInitError() {
        this.container.innerHTML = `
            <div class="game-error">
                <h3>❌ Error loading</h3>
                <p>This content doesn't contain texts compatible with Text Reader.</p>
                <p>The reader needs texts to display.</p>
                <button onclick="AppNavigation.goBack()" class="back-btn">← Back</button>
            </div>
        `;
    }

    extractTexts(content) {
        let texts = [];
        
        console.log('📖 Extracting texts from:', content?.name || 'content');
        
        // Use raw module content if available
        if (content.rawContent) {
            console.log('📦 Using raw module content');
            return this.extractTextsFromRaw(content.rawContent);
        }
        
        // Format with texts array
        if (content.texts && Array.isArray(content.texts)) {
            console.log('📝 Texts format detected');
            texts = content.texts.filter(text => 
                text.content && text.content.trim() !== ''
            );
        }
        // Modern format with contentItems
        else if (content.contentItems && Array.isArray(content.contentItems)) {
            console.log('🆕 ContentItems format detected');
            texts = content.contentItems
                .filter(item => item.type === 'text' && item.content)
                .map(item => ({
                    title: item.title || 'Text',
                    content: item.content
                }));
        }
        
        return this.finalizeTexts(texts);
    }
    
    extractTextsFromRaw(rawContent) {
        console.log('🔧 Extracting from raw content:', rawContent.name || 'Module');
        let texts = [];
        
        // Simple format (texts array)
        if (rawContent.texts && Array.isArray(rawContent.texts)) {
            texts = rawContent.texts.filter(text => 
                text.content && text.content.trim() !== ''
            );
            console.log(`📝 ${texts.length} texts extracted from texts array`);
        }
        // ContentItems format
        else if (rawContent.contentItems && Array.isArray(rawContent.contentItems)) {
            texts = rawContent.contentItems
                .filter(item => item.type === 'text' && item.content)
                .map(item => ({
                    title: item.title || 'Text',
                    content: item.content
                }));
            console.log(`🆕 ${texts.length} texts extracted from contentItems`);
        }
        
        return this.finalizeTexts(texts);
    }
    
    finalizeTexts(texts) {
        // Validation and cleanup
        texts = texts.filter(text => 
            text && 
            typeof text.content === 'string' && 
            text.content.trim() !== ''
        );
        
        if (texts.length === 0) {
            console.error('❌ No valid texts found');
            // Demo texts as fallback
            texts = [
                { 
                    title: "Demo Text", 
                    content: "This is a demo text. It has multiple sentences. Each sentence will be displayed one by one. You can navigate using the buttons below."
                }
            ];
            console.warn('🚨 Using demo texts');
        }
        
        console.log(`✅ Text Reader: ${texts.length} texts finalized`);
        return texts;
    }

    createReaderInterface() {
        this.container.innerHTML = `
            <div class="text-reader-wrapper">
                <!-- Text Selection -->
                <div class="text-selection">
                    <label for="text-selector" class="text-selector-label">Choose a text:</label>
                    <select id="text-selector" class="text-selector">
                        <!-- Options will be generated here -->
                    </select>
                    <div class="text-progress">
                        <span id="sentence-counter">1 / 1</span>
                    </div>
                </div>

                <!-- Reading Area -->
                <div class="reading-area" id="reading-area">
                    <div class="sentence-display" id="sentence-display">
                        <!-- Current sentence will appear here -->
                    </div>
                    
                    <div class="full-text-display" id="full-text-display" style="display: none;">
                        <!-- Full text will appear here -->
                    </div>
                </div>

                <!-- Navigation Controls -->
                <div class="reader-controls">
                    <button class="control-btn secondary" id="prev-sentence-btn" disabled>← Previous</button>
                    <button class="control-btn primary" id="next-sentence-btn">Next →</button>
                    <button class="control-btn secondary" id="show-full-btn">📄 Full Text</button>
                </div>

                <!-- Full Text Navigation -->
                <div class="full-text-navigation" id="full-text-navigation" style="display: none;">
                    <button class="control-btn secondary" id="back-to-reading-btn">📖 Back to Reading</button>
                </div>

                <!-- Feedback Area -->
                <div class="feedback-area" id="feedback-area">
                    <div class="instruction">
                        Use Next/Previous buttons to navigate through sentences
                    </div>
                </div>
            </div>
        `;
    }

    setupEventListeners() {
        document.getElementById('next-sentence-btn').addEventListener('click', () => this.nextSentence());
        document.getElementById('prev-sentence-btn').addEventListener('click', () => this.prevSentence());
        document.getElementById('show-full-btn').addEventListener('click', () => this.showFullText());
        
        document.getElementById('back-to-reading-btn').addEventListener('click', () => this.backToReading());
        document.getElementById('text-selector').addEventListener('change', (e) => this.selectText(parseInt(e.target.value)));
        
        // Keyboard navigation
        document.addEventListener('keydown', (e) => {
            if (!this.isRunning) return;
            
            if (this.showingFullText) {
                if (e.key === 'Escape') this.backToReading();
            } else {
                if (e.key === 'ArrowLeft') this.prevSentence();
                else if (e.key === 'ArrowRight') this.nextSentence();
                else if (e.key === 'Enter' || e.key === ' ') this.showFullText();
            }
        });
    }

    start() {
        console.log('📖 Text Reader: Starting');
        this.isRunning = true;
    }

    restart() {
        console.log('🔄 Text Reader: Restarting');
        this.reset();
        this.start();
    }

    reset() {
        this.currentTextIndex = 0;
        this.currentSentenceIndex = 0;
        this.isRunning = false;
        this.showingFullText = false;
        this.loadText();
    }

    loadText() {
        if (this.currentTextIndex >= this.texts.length) {
            this.currentTextIndex = 0;
        }
        
        this.currentText = this.texts[this.currentTextIndex];
        this.sentences = this.splitIntoSentences(this.currentText.content);
        this.currentSentenceIndex = 0;
        this.showingFullText = false;
        
        this.populateTextSelector();
        this.updateDisplay();
        this.updateUI();
    }
    
    populateTextSelector() {
        const selector = document.getElementById('text-selector');
        selector.innerHTML = '';
        
        this.texts.forEach((text, index) => {
            const option = document.createElement('option');
            option.value = index;
            option.textContent = text.title || `Text ${index + 1}`;
            if (index === this.currentTextIndex) {
                option.selected = true;
            }
            selector.appendChild(option);
        });
    }
    
    selectText(textIndex) {
        if (textIndex >= 0 && textIndex < this.texts.length) {
            this.currentTextIndex = textIndex;
            this.currentText = this.texts[this.currentTextIndex];
            this.sentences = this.splitIntoSentences(this.currentText.content);
            this.currentSentenceIndex = 0;
            
            // Always go back to sentence reading when changing text
            if (this.showingFullText) {
                this.backToReading();
            } else {
                this.updateDisplay();
                this.updateUI();
            }
            
            this.showFeedback(`Switched to: ${this.currentText.title}`, 'info');
        }
    }

    splitIntoSentences(text) {
        // Split by periods, exclamation marks, and question marks
        // Keep the punctuation with the sentence
        const sentences = text.split(/(?<=[.!?])\s+/)
            .filter(sentence => sentence.trim() !== '')
            .map(sentence => sentence.trim());
        
        return sentences.length > 0 ? sentences : [text];
    }

    nextSentence() {
        if (this.currentSentenceIndex < this.sentences.length - 1) {
            this.currentSentenceIndex++;
            this.updateDisplay();
            this.updateUI();
        } else {
            // End of sentences, show full text automatically
            this.showFullText();
        }
    }

    prevSentence() {
        if (this.currentSentenceIndex > 0) {
            this.currentSentenceIndex--;
            this.updateDisplay();
            this.updateUI();
        }
    }

    showFullText() {
        this.showingFullText = true;
        document.getElementById('sentence-display').style.display = 'none';
        document.getElementById('full-text-display').style.display = 'block';
        document.getElementById('full-text-display').innerHTML = `
            <div class="full-text-content">
                <p>${this.currentText.content}</p>
            </div>
        `;
        
        // Show full text navigation controls
        document.querySelector('.reader-controls').style.display = 'none';
        document.getElementById('full-text-navigation').style.display = 'flex';
        
        this.showFeedback('Full text displayed. Use dropdown to change text.', 'info');
    }

    backToReading() {
        this.showingFullText = false;
        document.getElementById('sentence-display').style.display = 'block';
        document.getElementById('full-text-display').style.display = 'none';
        
        // Show sentence navigation controls
        document.querySelector('.reader-controls').style.display = 'flex';
        document.getElementById('full-text-navigation').style.display = 'none';
        
        this.updateDisplay();
        this.updateUI();
        this.showFeedback('Back to sentence-by-sentence reading.', 'info');
    }

    // Text navigation methods removed - using dropdown instead

    updateDisplay() {
        if (this.showingFullText) return;
        
        const sentenceDisplay = document.getElementById('sentence-display');
        const currentSentence = this.sentences[this.currentSentenceIndex];
        
        sentenceDisplay.innerHTML = `
            <div class="current-sentence">
                ${currentSentence}
            </div>
        `;
    }

    updateUI() {
        // Update counters
        document.getElementById('sentence-counter').textContent = `${this.currentSentenceIndex + 1} / ${this.sentences.length}`;
        
        // Update button states
        document.getElementById('prev-sentence-btn').disabled = this.currentSentenceIndex === 0;
        document.getElementById('next-sentence-btn').disabled = false;
        document.getElementById('next-sentence-btn').textContent = 
            this.currentSentenceIndex === this.sentences.length - 1 ? 'Full Text →' : 'Next →';
    }

    // updateTextNavigation method removed - using dropdown instead

    showFeedback(message, type = 'info') {
        const feedbackArea = document.getElementById('feedback-area');
        feedbackArea.innerHTML = `<div class="instruction ${type}">${message}</div>`;
    }

    destroy() {
        this.isRunning = false;
        this.container.innerHTML = '';
    }
}

// Module registration
window.GameModules = window.GameModules || {};
window.GameModules.TextReader = TextReaderGame;