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// Core game logic for minimal cloze reader
import bookDataService from './bookDataService.js';
import { AIService } from './aiService.js';
import ChatService from './conversationManager.js';
const aiService = new AIService();
class ClozeGame {
constructor() {
this.currentBook = null;
this.originalText = '';
this.clozeText = '';
this.blanks = [];
this.userAnswers = [];
this.score = 0;
this.currentRound = 1;
this.currentLevel = 1; // Track difficulty level separately from round
this.contextualization = '';
this.hints = [];
this.chatService = new ChatService(aiService);
this.lastResults = null; // Store results for answer revelation
}
async initialize() {
try {
await bookDataService.loadDataset();
console.log('Game initialized successfully');
} catch (error) {
console.error('Failed to initialize game:', error);
throw error;
}
}
async startNewRound() {
try {
// Get a random book (now async with HF streaming)
this.currentBook = await bookDataService.getRandomBook();
// Extract a coherent passage avoiding fragmented text
const fullText = this.currentBook.text;
let passage = this.extractCoherentPassage(fullText);
this.originalText = passage.trim();
// Run AI calls in parallel for faster loading
const [clozeResult, contextualizationResult] = await Promise.all([
this.createClozeText(),
this.generateContextualization()
]);
return {
title: this.currentBook.title,
author: this.currentBook.author,
text: this.clozeText,
blanks: this.blanks,
contextualization: this.contextualization,
hints: this.hints
};
} catch (error) {
console.error('Error starting new round:', error);
throw error;
}
}
extractCoherentPassage(text) {
// Simple elegant solution: start from middle third of book where actual content is
const textLength = text.length;
const startFromMiddle = Math.floor(textLength * 0.3); // Skip first 30%
const endAtThreeQuarters = Math.floor(textLength * 0.8); // Stop before last 20%
// Random position in the middle section
const availableLength = endAtThreeQuarters - startFromMiddle;
const randomOffset = Math.floor(Math.random() * Math.max(0, availableLength - 800));
const startIndex = startFromMiddle + randomOffset;
// Extract passage
let passage = text.substring(startIndex, startIndex + 800);
// Clean up start - find first complete sentence
const firstSentenceEnd = passage.search(/[.!?]\s+[A-Z]/);
if (firstSentenceEnd > 0 && firstSentenceEnd < 200) {
passage = passage.substring(firstSentenceEnd + 2);
}
// Clean up end - end at complete sentence
const lastSentenceEnd = passage.lastIndexOf('.');
if (lastSentenceEnd > 300) {
passage = passage.substring(0, lastSentenceEnd + 1);
}
return passage.trim();
}
async createClozeText() {
const words = this.originalText.split(' ');
// Progressive difficulty: levels 1-2 = 1 blank, levels 3-4 = 2 blanks, level 5+ = 3 blanks
let numberOfBlanks;
if (this.currentLevel <= 2) {
numberOfBlanks = 1;
} else if (this.currentLevel <= 4) {
numberOfBlanks = 2;
} else {
numberOfBlanks = 3;
}
// Update chat service with current level
this.chatService.setLevel(this.currentLevel);
// Always use AI for word selection with fallback
let significantWords;
try {
significantWords = await aiService.selectSignificantWords(
this.originalText,
numberOfBlanks
);
console.log('AI selected words:', significantWords);
} catch (error) {
console.warn('AI word selection failed, using manual fallback:', error);
significantWords = this.selectWordsManually(words, numberOfBlanks);
console.log('Manual selected words:', significantWords);
}
// Ensure we have valid words
if (!significantWords || significantWords.length === 0) {
console.warn('No words selected, using emergency fallback');
significantWords = this.selectWordsManually(words, numberOfBlanks);
}
// Find word indices for selected significant words, distributed throughout passage
const selectedIndices = [];
const wordsLower = words.map(w => w.toLowerCase().replace(/[^\w]/g, ''));
// Create sections of the passage to ensure distribution
const passageSections = this.dividePassageIntoSections(words.length, numberOfBlanks);
significantWords.forEach((significantWord, index) => {
// Clean the significant word for matching
const cleanSignificant = significantWord.toLowerCase().replace(/[^\w]/g, '');
// Look for the word within the appropriate section for better distribution
const sectionStart = passageSections[index] ? passageSections[index].start : 0;
const sectionEnd = passageSections[index] ? passageSections[index].end : words.length;
let wordIndex = -1;
// First try to find the word in the designated section
for (let i = sectionStart; i < sectionEnd; i++) {
if (wordsLower[i] === cleanSignificant && !selectedIndices.includes(i)) {
wordIndex = i;
break;
}
}
// If not found in section, look globally
if (wordIndex === -1) {
wordIndex = wordsLower.findIndex((word, idx) =>
word === cleanSignificant && !selectedIndices.includes(idx)
);
}
if (wordIndex !== -1) {
selectedIndices.push(wordIndex);
} else {
console.warn(`Could not find word "${significantWord}" in passage`);
}
});
// Log the matching results
console.log(`Found ${selectedIndices.length} of ${significantWords.length} words in passage`);
// If no words were matched, fall back to manual selection
if (selectedIndices.length === 0) {
console.warn('No AI words matched in passage, using manual selection');
const manualWords = this.selectWordsManually(words, numberOfBlanks);
// Try to match manual words
manualWords.forEach((manualWord, index) => {
const cleanManual = manualWord.toLowerCase().replace(/[^\w]/g, '');
const wordIndex = wordsLower.findIndex((word, idx) =>
word === cleanManual && !selectedIndices.includes(idx)
);
if (wordIndex !== -1) {
selectedIndices.push(wordIndex);
}
});
console.log(`After manual fallback: ${selectedIndices.length} words found`);
}
// Sort indices for easier processing
selectedIndices.sort((a, b) => a - b);
// Final safety check - if still no words found, pick random content words
if (selectedIndices.length === 0) {
console.error('Critical: No words could be selected, using emergency fallback');
const contentWords = words.map((word, idx) => ({ word: word.toLowerCase().replace(/[^\w]/g, ''), idx }))
.filter(item => item.word.length > 3 && !['the', 'and', 'but', 'for', 'are', 'was'].includes(item.word))
.slice(0, numberOfBlanks);
selectedIndices.push(...contentWords.map(item => item.idx));
console.log(`Emergency fallback selected ${selectedIndices.length} words`);
}
// Create blanks array and cloze text
this.blanks = [];
this.hints = [];
const clozeWords = [...words];
for (let i = 0; i < selectedIndices.length; i++) {
const index = selectedIndices[i];
const originalWord = words[index];
const cleanWord = originalWord.replace(/[^\w]/g, '');
const blankData = {
index: i,
originalWord: cleanWord,
wordIndex: index
};
this.blanks.push(blankData);
// Initialize chat context for this word
const wordContext = {
originalWord: cleanWord,
sentence: this.originalText,
passage: this.originalText,
bookTitle: this.currentBook.title,
author: this.currentBook.author,
wordPosition: index,
difficulty: this.calculateWordDifficulty(cleanWord, index, words)
};
this.chatService.initializeWordContext(`blank_${i}`, wordContext);
// Generate structural hint based on level
let structuralHint;
if (this.currentLevel <= 2) {
// Levels 1-2: show length, first letter, and last letter
structuralHint = `${cleanWord.length} letters, starts with "${cleanWord[0]}", ends with "${cleanWord[cleanWord.length - 1]}"`;
} else {
// Level 3+: show length and first letter only
structuralHint = `${cleanWord.length} letters, starts with "${cleanWord[0]}"`;
}
this.hints.push({ index: i, hint: structuralHint });
// Replace word with input field placeholder
clozeWords[index] = `___BLANK_${i}___`;
}
this.clozeText = clozeWords.join(' ');
this.userAnswers = new Array(this.blanks.length).fill('');
// Debug: Log the created cloze text
console.log('Created cloze text:', this.clozeText);
console.log('Number of blanks:', this.blanks.length);
return true; // Return success indicator
}
dividePassageIntoSections(totalWords, numberOfBlanks) {
const sections = [];
const sectionSize = Math.floor(totalWords / numberOfBlanks);
for (let i = 0; i < numberOfBlanks; i++) {
const start = i * sectionSize;
const end = i === numberOfBlanks - 1 ? totalWords : (i + 1) * sectionSize;
sections.push({ start, end });
}
return sections;
}
selectWordsManually(words, numberOfBlanks) {
// Fallback manual word selection - avoid function words completely
const functionWords = new Set([
// Articles
'the', 'a', 'an',
// Prepositions
'in', 'on', 'at', 'to', 'for', 'of', 'with', 'by', 'from', 'up', 'about', 'into', 'over', 'after',
// Conjunctions
'and', 'or', 'but', 'so', 'yet', 'nor', 'because', 'since', 'although', 'if', 'when', 'while',
// Pronouns
'i', 'you', 'he', 'she', 'it', 'we', 'they', 'me', 'him', 'her', 'us', 'them', 'my', 'your', 'his', 'her', 'its', 'our', 'their',
'this', 'that', 'these', 'those', 'who', 'what', 'which', 'whom', 'whose',
// Auxiliary verbs
'is', 'are', 'was', 'were', 'be', 'been', 'being', 'have', 'has', 'had', 'do', 'does', 'did',
'will', 'would', 'could', 'should', 'may', 'might', 'must', 'can', 'shall'
]);
// Get content words with their indices for better distribution
const contentWordIndices = [];
words.forEach((word, index) => {
const cleanWord = word.toLowerCase().replace(/[^\w]/g, '');
if (cleanWord.length > 3 && !functionWords.has(cleanWord)) {
contentWordIndices.push({ word: cleanWord, index });
}
});
// Distribute selection across sections
const passageSections = this.dividePassageIntoSections(words.length, numberOfBlanks);
const selectedWords = [];
for (let i = 0; i < numberOfBlanks && i < passageSections.length; i++) {
const section = passageSections[i];
const sectionWords = contentWordIndices.filter(item =>
item.index >= section.start && item.index < section.end
);
if (sectionWords.length > 0) {
const randomIndex = Math.floor(Math.random() * sectionWords.length);
selectedWords.push(sectionWords[randomIndex].word);
}
}
// Fill remaining slots if needed
while (selectedWords.length < numberOfBlanks && contentWordIndices.length > 0) {
const availableWords = contentWordIndices
.map(item => item.word)
.filter(word => !selectedWords.includes(word));
if (availableWords.length > 0) {
const randomIndex = Math.floor(Math.random() * availableWords.length);
selectedWords.push(availableWords[randomIndex]);
} else {
break;
}
}
return selectedWords;
}
async generateContextualization() {
// Always use AI for contextualization
try {
this.contextualization = await aiService.generateContextualization(
this.currentBook.title,
this.currentBook.author
);
return this.contextualization;
} catch (error) {
console.warn('AI contextualization failed, using fallback:', error);
this.contextualization = `"${this.currentBook.title}" by ${this.currentBook.author} - A classic work of literature.`;
return this.contextualization;
}
}
renderClozeText() {
let html = this.clozeText;
this.blanks.forEach((blank, index) => {
const inputHtml = `<input type="text"
class="cloze-input"
data-blank-index="${index}"
placeholder="${'_'.repeat(Math.max(3, blank.originalWord.length))}"
style="width: ${Math.max(80, blank.originalWord.length * 12)}px;">`;
html = html.replace(`___BLANK_${index}___`, inputHtml);
});
return html;
}
submitAnswers(answers) {
this.userAnswers = answers;
let correctCount = 0;
const results = [];
this.blanks.forEach((blank, index) => {
const userAnswer = answers[index].trim().toLowerCase();
const correctAnswer = blank.originalWord.toLowerCase();
const isCorrect = userAnswer === correctAnswer;
if (isCorrect) correctCount++;
results.push({
blankIndex: index,
userAnswer: answers[index],
correctAnswer: blank.originalWord,
isCorrect
});
});
const scorePercentage = Math.round((correctCount / this.blanks.length) * 100);
this.score = scorePercentage;
// Calculate pass requirements based on number of blanks
const totalBlanks = this.blanks.length;
const requiredCorrect = this.calculateRequiredCorrect(totalBlanks);
const passed = correctCount >= requiredCorrect;
const resultsData = {
correct: correctCount,
total: this.blanks.length,
percentage: scorePercentage,
passed: passed,
results,
canAdvanceLevel: passed,
shouldRevealAnswers: !passed,
requiredCorrect: requiredCorrect,
currentLevel: this.currentLevel
};
// Store results for potential answer revelation
this.lastResults = resultsData;
return resultsData;
}
// Calculate required correct answers based on total blanks
calculateRequiredCorrect(totalBlanks) {
if (totalBlanks === 1) {
// Level 1: Must get the single word correct
return 1;
} else if (totalBlanks % 2 === 1) {
// Odd number of blanks (3, 5, etc.): require all but one
return totalBlanks - 1;
} else {
// Even number of blanks: require all correct
return totalBlanks;
}
}
showAnswers() {
return this.blanks.map(blank => ({
index: blank.index,
word: blank.originalWord
}));
}
nextRound() {
// Check if user passed the previous round
const passed = this.lastResults && this.lastResults.passed;
// Always increment round counter
this.currentRound++;
// Only advance level if user passed
if (passed) {
this.currentLevel++;
}
// If failed, stay at same level
// Clear chat conversations for new round
this.chatService.clearConversations();
// Clear last results since we're moving to new round
this.lastResults = null;
return this.startNewRound();
}
// Get answers for current round (for revelation when switching passages)
getCurrentAnswers() {
if (!this.lastResults) return null;
return {
hasResults: true,
passed: this.lastResults.passed,
shouldRevealAnswers: this.lastResults.shouldRevealAnswers,
currentLevel: this.lastResults.currentLevel,
requiredCorrect: this.lastResults.requiredCorrect,
answers: this.blanks.map(blank => ({
index: blank.index,
correctAnswer: blank.originalWord,
userAnswer: this.lastResults.results[blank.index]?.userAnswer || '',
isCorrect: this.lastResults.results[blank.index]?.isCorrect || false
}))
};
}
// Calculate difficulty of a word based on various factors
calculateWordDifficulty(word, position, allWords) {
let difficulty = 1;
// Length factor
if (word.length > 8) difficulty += 2;
else if (word.length > 5) difficulty += 1;
// Position factor (middle words might be harder)
const relativePosition = position / allWords.length;
if (relativePosition > 0.3 && relativePosition < 0.7) difficulty += 1;
// Complexity factors
if (word.includes('ing') || word.includes('ed')) difficulty += 0.5;
if (word.includes('tion') || word.includes('sion')) difficulty += 1;
// Current level factor
difficulty += (this.currentLevel - 1) * 0.5;
return Math.min(5, Math.max(1, Math.round(difficulty)));
}
// Simple, clean hint with just essential info based on level
generateContextualFallbackHint(word, wordIndex, allWords) {
if (this.currentLevel <= 2) {
return `${word.length} letters, starts with "${word[0]}", ends with "${word[word.length - 1]}"`;
} else {
return `${word.length} letters, starts with "${word[0]}"`;
}
}
// Chat functionality methods
async askQuestionAboutBlank(blankIndex, questionType, currentInput = '') {
const blankId = `blank_${blankIndex}`;
return await this.chatService.askQuestion(blankId, questionType, currentInput);
}
getSuggestedQuestionsForBlank(blankIndex) {
const blankId = `blank_${blankIndex}`;
return this.chatService.getSuggestedQuestions(blankId);
}
// Enhanced render method to include chat buttons
renderClozeTextWithChat() {
let html = this.clozeText;
this.blanks.forEach((blank, index) => {
const chatButtonId = `chat-btn-${index}`;
const inputHtml = `
<span class="inline-flex items-center gap-1">
<input type="text"
class="cloze-input"
data-blank-index="${index}"
placeholder="${'_'.repeat(Math.max(3, blank.originalWord.length))}"
style="width: ${Math.max(80, blank.originalWord.length * 12)}px;">
<button id="${chatButtonId}"
class="chat-button text-blue-500 hover:text-blue-700 text-sm"
data-blank-index="${index}"
title="Ask question about this word">
💬
</button>
</span>`;
html = html.replace(`___BLANK_${index}___`, inputHtml);
});
return html;
}
}
export default ClozeGame; |