Update src/streamlit_app.py

src/streamlit_app.py

@@ -1,682 +1,682 @@
-# app.py
-"""TriviaVerse Enhanced - Advanced Quiz Application"""
-
-import streamlit as st
-import time
-from datetime import datetime
-import random
-# Removed dotenv import and os import as .env file is not persisting
-# from dotenv import load_dotenv
-# import os
-
-from config.settings import (
-    DIFFICULTY_LEVELS,
-    BADGES,
-    RANDOM_TOPICS,
-)
-from config.themes import THEMES
-from config.languages import SUPPORTED_LANGUAGES
-from modules.mcq_generator import generate_quiz_set
-from modules.flashcard_generator import generate_smart_deck
-from modules.fact_game import generate_random_fact
-from modules.adaptive_engine import AdaptiveEngine
-from utils.ui_components import (
-    apply_custom_theme,
-    display_user_stats,
-    display_badges,
-    create_progress_chart,
-    animated_success,
-    create_quiz_card,
-    render_flashcard,
-)
-from utils.score_tracker import ScoreTracker
-from utils.mobile_responsive import responsive_columns, responsive_css
-from utils.user_auth import init_authentication, authenticate_user
-from utils.challenge_manager import ChallengeManager
-from modules.info_page import display_page_info
-from utils.translator import get_translated_texts
-
-# Removed load_dotenv() call as .env file is not persisting
-# load_dotenv()
-
-# --- Page Config ---
-st.set_page_config(
-    page_title="TriviaVerse",
-    page_icon="🎯",
-    layout="wide",
-    initial_sidebar_state="expanded",
-)
-
-# --- App State Initialization ---
-if "user_id" not in st.session_state:
-    st.session_state.user_id = st.session_state.get("username", f"user_{int(time.time())}")
-if "score_tracker" not in st.session_state:
-    st.session_state.score_tracker = ScoreTracker(st.session_state.user_id)
-if "theme" not in st.session_state:
-    st.session_state.theme = "default"
-if "language" not in st.session_state:
-    st.session_state.language = "en"
-if "topic" not in st.session_state:
-    st.session_state.topic = "Python programming"
-
-# --- Load UI Text based on Language ---
-ui = get_translated_texts(st.session_state.language)
-
-# --- Update Page Title with Translated Text ---
-st.title(f"{ui.get('app_name', 'TriviaVerse')} - {ui.get('enhanced_edition', 'Enhanced Edition')}")
-
-# Initialize other session state variables
-if "current_streak" not in st.session_state:
-    st.session_state.current_streak = 0
-if "adaptive_engine" not in st.session_state:
-    st.session_state.adaptive_engine = AdaptiveEngine(st.session_state.user_id)
-if "answer" not in st.session_state:
-    st.session_state.answer = None
-if "mcq_quiz_questions" not in st.session_state:
-    st.session_state.mcq_quiz_questions = []
-if "current_question_index" not in st.session_state:
-    st.session_state.current_question_index = 0
-if "quiz_started" not in st.session_state:
-    st.session_state.quiz_started = False
-if "quiz_results" not in st.session_state:
-    st.session_state.quiz_results = []
-if "flashcard_deck" not in st.session_state:
-    st.session_state.flashcard_deck = []
-if "current_flashcard_index" not in st.session_state:
-    st.session_state.current_flashcard_index = 0
-if "challenge_manager" not in st.session_state:
-    st.session_state.challenge_manager = ChallengeManager()
-if "current_challenge_id" not in st.session_state:
-    st.session_state.current_challenge_id = None
-if "challenge_quiz_questions" not in st.session_state:
-    st.session_state.challenge_quiz_questions = []
-if "challenge_current_question_index" not in st.session_state:
-    st.session_state.challenge_current_question_index = 0
-if "game_state" not in st.session_state:
-    st.session_state.game_state = "menu"
-if "challenge_created_id" not in st.session_state:
-    st.session_state.challenge_created_id = None
-if "current_page" not in st.session_state:
-    st.session_state.current_page = "home"
-
-# --- Authentication ---
-init_authentication()
-if not authenticate_user():
-    st.stop()
-
-# --- UI Rendering ---
-apply_custom_theme(st.session_state.theme)
-st.markdown(responsive_css(), unsafe_allow_html=True)
-
-def render_homepage():
-    st.markdown(f"""
-        <div class="homepage-container" style="text-align: center;">
-            <h1 class="homepage-title">{ui.get('app_name', 'TriviaVerse')}</h1>
-            <p class="homepage-description">{ui.get('app_description', 'A Dynamic Quiz App')}</p>
-            <br><br>
-    """, unsafe_allow_html=True)
-    
-    if st.button(ui.get('start_your_learning_journey', "Start Your Learning Journey"), key="start_journey"):
-        st.session_state.current_page = "game_modes"
-        st.rerun()
-
-with st.sidebar:
-    st.title(f"🎯 {ui.get('app_name', 'TriviaVerse')}")
-    st.markdown(f"### 🎮 {ui.get('game_settings', 'Game Settings')}")
-
-    if st.button(f"🏠 {ui.get('home', 'Home')}", key="sidebar_home"):
-        st.session_state.current_page = "home"
-        st.rerun()
-
-    st.divider()
-    
-    lang_choice_key = st.selectbox(
-        f"🌐 {ui.get('choose_language', 'Choose Language')}",
-        options=list(SUPPORTED_LANGUAGES.keys()),
-        index=list(SUPPORTED_LANGUAGES.values()).index(st.session_state.language)
-    )
-    if SUPPORTED_LANGUAGES[lang_choice_key] != st.session_state.language:
-        st.session_state.language = SUPPORTED_LANGUAGES[lang_choice_key]
-        st.rerun()
-
-    st.info(f"👤 {ui.get('welcome', 'Welcome')}, {st.session_state.get('username', 'Guest')}!")
-
-    theme_select = st.selectbox(
-        f"🎨 {ui.get('choose_theme', 'Choose Theme')}",
-        list(THEMES.keys()),
-        index=list(THEMES.keys()).index(st.session_state.theme),
-    )
-    if theme_select != st.session_state.theme:
-        st.session_state.theme = theme_select
-        st.rerun()
-
-    st.divider()
-
-    mode = st.radio(
-        f"🎲 {ui.get('select_game_mode', 'Select Game Mode')}",
-        [ui.get(k, k) for k in ["mcq_quiz", "flashcards", "fact_game", "challenge_mode", "page_info"]],
-    )
-
-    use_adaptive = st.checkbox(f"🤖 {ui.get('use_adaptive_difficulty', 'Use Adaptive Difficulty')}", value=True)
-    difficulty = st.session_state.adaptive_engine.get_recommended_difficulty() if use_adaptive else st.selectbox(
-        f"⚡ {ui.get('difficulty_level', 'Difficulty Level')}",
-        list(DIFFICULTY_LEVELS.keys()),
-    )
-    if use_adaptive:
-        st.info(f"{ui.get('recommended', 'Recommended')}: {difficulty}")
-
-    st.markdown(f"### 📖 {ui.get('choose_topic', 'Choose Topic')}")
-    
-    def update_topic_text_input():
-        st.session_state.topic = st.session_state.topic_text_input
-        
-    st.text_input(ui.get("enter_topic", "Enter topic"), value=st.session_state.topic, key="topic_text_input", on_change=update_topic_text_input)
-    
-    def update_random_topic():
-        st.session_state.topic = random.choice(RANDOM_TOPICS)
-
-    if st.button(f"🎲 {ui.get('random_topic', 'Random')}", on_click=update_random_topic):
-        pass # The topic is updated by the on_click callback
-
-    st.markdown(f"### 🔥 {ui.get('trending_topics', 'Trending Topics')}")
-    def update_trending_topic():
-        if st.session_state.trending_topic_select:
-            st.session_state.topic = st.session_state.trending_topic_select
-
-    st.selectbox(ui.get("quick_select", "Quick select"), [""] + RANDOM_TOPICS, key="trending_topic_select", on_change=update_trending_topic)
-
-    if mode in [ui.get("mcq_quiz"), ui.get("challenge_mode")]:
-        st.markdown(f"### 🔢 {ui.get('number_of_questions', 'Number of Questions')}")
-        st.session_state.num_questions = st.selectbox(ui.get("select_number_of_questions", "Select number"), [5, 10, 15], index=1)
-
-    st.divider()
-    st.markdown(f"### 📊 {ui.get('your_stats', 'Your Stats')}")
-    stats = st.session_state.score_tracker.get_stats()
-    display_user_stats(stats, ui)
-
-    if st.button(f"🚪 {ui.get('logout', 'Logout')}", type="secondary", use_container_width=True):
-        st.session_state.clear()
-        st.rerun()
-
-if st.session_state.current_page == "home":
-    render_homepage()
-else:
-    # Header with user dashboard
-    col1, col2 = st.columns([2, 1])
-    with col1:
-        st.markdown(f"<h1 class='app-title'>🎮 {ui.get('app_name', 'TriviaVerse')} - {ui.get('enhanced_edition', 'Enhanced Edition')}</h1>", unsafe_allow_html=True)
-        st.markdown(f"*{ui.get('app_description', 'A gamified learning platform powered by Wikimedia')}*")
-    with col2:
-        # Display current time and greeting
-        current_hour = datetime.now().hour
-        greeting = (
-            ui.get("good_morning", "Good morning")
-            if current_hour < 12
-            else ui.get("good_afternoon", "Good afternoon")
-            if current_hour < 18
-            else ui.get("good_evening", "Good evening")
-        )
-        st.markdown(f"### {greeting}, {st.session_state.get('username', 'Learner')}! 👋")
-        st.caption(f"{datetime.now().strftime('%B %d, %Y - %I:%M %p')}")
-
-    # Display user statistics dashboard
-    stats = st.session_state.score_tracker.get_stats()
-    display_user_stats(stats, ui)
-
-    # Display badges
-    if stats["badges"]:
-        st.markdown(f"### 🏅 {ui.get('your_achievements', 'Your Achievements')}")
-        display_badges(stats["badges"], ui)
-
-    # Progress chart
-    with st.expander(f"📈 {ui.get('view_detailed_progress', 'View Detailed Progress')}", expanded=False):
-        if stats["quizzes_completed"] > 0:
-            fig = create_progress_chart(stats, ui)
-            st.plotly_chart(fig, use_container_width=True)
-        else:
-            st.info(ui.get("complete_quizzes_prompt", "Complete some quizzes to see your progress chart!"))
-
-    st.divider()
-
-    # Main game area
-    if mode == ui.get("mcq_quiz"):
-        st.header(ui.get("mcq_quiz"))
-
-        # Initialize or reset quiz
-        if not st.session_state.quiz_started:
-            if st.button(ui.get("start_new_quiz", "Start New Quiz"), type="primary", use_container_width=True):
-                with st.spinner(ui.get("generating_quiz_questions", "Generating quiz questions...")):
-                    st.session_state.mcq_quiz_questions = generate_quiz_set(
-                        st.session_state.topic,
-                        difficulty,
-                        st.session_state.num_questions
-                    )
-                    if st.session_state.mcq_quiz_questions:
-                        st.session_state.current_question_index = 0
-                        st.session_state.quiz_started = True
-                        st.session_state.answered = False
-                        st.session_state.question_start_time = time.time()
-                        st.session_state.hints_used = 0
-                        st.session_state.quiz_results = [] # Reset quiz results
-                        st.rerun()
-                    else:
-                        st.error(ui.get("failed_quiz_generation", "Failed to generate quiz questions. Please try a different topic."))
-
-        if st.session_state.quiz_started and st.session_state.mcq_quiz_questions:
-            # Display current question
-            current_mcq = st.session_state.mcq_quiz_questions[st.session_state.current_question_index]
-            question_number = st.session_state.current_question_index + 1
-            total_questions = len(st.session_state.mcq_quiz_questions)
-
-            st.subheader(f"{ui.get('question', 'Question')} {question_number} {ui.get('of', 'of')} {total_questions}")
-
-            col1, col2, col3 = responsive_columns([1, 1, 1], [1, 1, 1])
-            with col2:
-                time_limit = DIFFICULTY_LEVELS[difficulty]["time_limit"]
-                st.info(f"⏱️ {ui.get('time_limit', 'Time Limit')}: {time_limit}s")
-            with col3:
-                hints_allowed = DIFFICULTY_LEVELS[difficulty]["hints_allowed"]
-                st.info(f"💡 {ui.get('hints', 'Hints')}: {hints_allowed}")
-
-            # Timer
-            elapsed_time = int(time.time() - st.session_state.question_start_time)
-            remaining_time = max(0, time_limit - elapsed_time)
-
-            if remaining_time > 0 and not st.session_state.answered:
-                st.progress(remaining_time / time_limit)
-                st.caption(f"⏱️ {ui.get('time_remaining', 'Time remaining')}: {remaining_time}s")
-
-                create_quiz_card(
-                    current_mcq["question"],
-                    current_mcq["options"],
-                    key="answer"
-                )
-
-                if hints_allowed > st.session_state.hints_used:
-                    if st.button(f"💡 {ui.get('get_hint', 'Get Hint')} ({hints_allowed - st.session_state.hints_used} {ui.get('left', 'left')})"):
-                        st.session_state.hints_used += 1
-                        st.info(f"💡 {ui.get('hint', 'Hint')}: {current_mcq['explanation'][:100]}...")
-
-                col1_btn, col2_btn, col3_btn = st.columns([1, 2, 1])
-                with col2_btn:
-                    if st.button(ui.get("submit_answer", "Submit Answer"), type="primary", use_container_width=True):
-                        is_correct = st.session_state.answer == current_mcq["correct_answer"]
-                        st.session_state.answered = True
-                        st.session_state.quiz_results.append({
-                            "question": current_mcq["question"],
-                            "user_answer": st.session_state.answer,
-                            "correct_answer": current_mcq["correct_answer"],
-                            "is_correct": is_correct,
-                            "explanation": current_mcq["explanation"]
-                        })
-                        st.session_state.adaptive_engine.update_performance(is_correct, difficulty, topic=current_mcq.get("topic"))
-                        if is_correct:
-                            st.session_state.current_streak += 1
-                            points = st.session_state.score_tracker.add_quiz_result("MCQ Quiz", 1, 1, difficulty)
-                            animated_success(f"{ui.get('correct', 'Correct')}! +{points} {ui.get('points', 'points')}")
-                            st.balloons()
-                        else:
-                            st.session_state.current_streak = 0
-                            st.error(f"❌ {ui.get('incorrect', 'Incorrect')}. {ui.get('the_answer_was', 'The answer was')}: {current_mcq['correct_answer']}")
-                        st.info(f"📚 {current_mcq['explanation']}")
-                        st.rerun()
-            elif st.session_state.answered:
-                if st.session_state.current_question_index < total_questions - 1:
-                    if st.button(ui.get("next_question", "Next Question"), type="secondary", use_container_width=True):
-                        st.session_state.current_question_index += 1
-                        st.session_state.answered = False
-                        st.session_state.question_start_time = time.time()
-                        st.session_state.hints_used = 0
-                        st.rerun()
-                else:
-                    st.success(ui.get("quiz_completed", "Quiz Completed!"))
-                    st.session_state.quiz_started = False
-                    st.session_state.mcq_quiz_questions = []
-                    st.session_state.current_question_index = 0
-                    st.markdown(f"### {ui.get('quiz_results_summary', 'Quiz Results Summary')}")
-                    for i, result in enumerate(st.session_state.quiz_results):
-                        st.markdown(f"**{ui.get('question', 'Question')} {i+1}:** {result['question']}")
-                        if result['is_correct']:
-                            st.success(f"✅ {ui.get('your_answer', 'Your Answer')}: {result['user_answer']} ({ui.get('correct', 'Correct')})")
-                        else:
-                            st.error(f"❌ {ui.get('your_answer', 'Your Answer')}: {result['user_answer']} ({ui.get('incorrect', 'Incorrect')})")
-                            st.info(f"{ui.get('correct_answer', 'Correct Answer')}: {result['correct_answer']}")
-                        st.caption(f"{ui.get('explanation', 'Explanation')}: {result['explanation']}")
-                        st.divider()
-                    if st.button(ui.get("start_new_quiz", "Start New Quiz"), type="primary", use_container_width=True):
-                        st.rerun()
-            else:
-                st.error(f"⏱️ {ui.get('times_up', 'Time\'s up!')}")
-                st.session_state.answered = True
-                st.session_state.quiz_results.append({
-                    "question": current_mcq["question"],
-                    "user_answer": ui.get("no_answer_timed_out", "No answer (Time's up)"),
-                    "correct_answer": current_mcq["correct_answer"],
-                    "is_correct": False,
-                    "explanation": current_mcq["explanation"]
-                })
-                st.session_state.score_tracker.add_quiz_result("MCQ Quiz", 0, 1, difficulty)
-                st.rerun()
-
-    elif mode == ui.get("flashcards"):
-        st.header(ui.get("interactive_flashcards", "Interactive Flashcards"))
-
-        if st.button(ui.get("generate_flashcard", "Generate Flashcard"), type="primary"):
-            with st.spinner(ui.get("creating_flashcard_deck", "Creating flashcard deck...")):
-                st.session_state.flashcard_deck = generate_smart_deck(
-                    st.session_state.topic,
-                    deck_size=10,
-                    difficulty=difficulty,
-                    adaptive_engine=st.session_state.adaptive_engine
-                )
-                if st.session_state.flashcard_deck:
-                    st.session_state.current_flashcard_index = 0
-                    st.session_state.card_flipped = False
-                    st.rerun()
-                else:
-                    st.error(ui.get("failed_flashcard_generation", "Failed to generate flashcards. Please try a different topic."))
-
-        if st.session_state.flashcard_deck:
-            current_flashcard = st.session_state.flashcard_deck[st.session_state.current_flashcard_index]
-            st.subheader(f"{ui.get('flashcard', 'Flashcard')} {st.session_state.current_flashcard_index + 1} {ui.get('of', 'of')} {len(st.session_state.flashcard_deck)}")
-
-            col1, col2, col3 = st.columns([1, 2, 1])
-            with col2:
-                render_flashcard(
-                    current_flashcard["front"],
-                    current_flashcard["back"],
-                    is_flipped=st.session_state.get("card_flipped", False),
-                )
-
-                if not st.session_state.get("card_flipped", False):
-                    if st.button(ui.get("flip_card", "Flip Card"), use_container_width=True):
-                        st.session_state.card_flipped = True
-                        st.rerun()
-                else:
-                    st.write("")
-                    btn_col1, btn_col2 = st.columns(2)
-                    with btn_col1:
-                        if st.button(ui.get("got_it", "Got it!"), use_container_width=True):
-                            st.session_state.adaptive_engine.update_performance(
-                                is_correct=True,
-                                difficulty=current_flashcard.get("difficulty", "Medium"),
-                                item_id=current_flashcard.get("item_id"),
-                                topic=current_flashcard.get("topic")
-                            )
-                            points = st.session_state.score_tracker.add_quiz_result("Flashcards", 1, 1, current_flashcard.get("difficulty", "Medium"))
-                            animated_success(f"{ui.get('great', 'Great')}! +{points} {ui.get('points', 'points')}")
-                            st.session_state.card_flipped = False
-                            if st.session_state.current_flashcard_index < len(st.session_state.flashcard_deck) - 1:
-                                st.session_state.current_flashcard_index += 1
-                            else:
-                                st.success(ui.get("flashcard_deck_completed", "Flashcard Deck Completed!"))
-                                st.session_session.flashcard_deck = []
-                                st.session_state.current_flashcard_index = 0
-                            st.rerun()
-                    with btn_col2:
-                        if st.button(ui.get("need_practice", "Need Practice"), use_container_width=True):
-                            st.session_state.adaptive_engine.update_performance(
-                                is_correct=False,
-                                difficulty=current_flashcard.get("difficulty", "Medium"),
-                                item_id=current_flashcard.get("item_id"),
-                                topic=current_flashcard.get("topic")
-                            )
-                            st.session_state.score_tracker.add_quiz_result("Flashcards", 0, 1, current_flashcard.get("difficulty", "Medium"))
-                            st.session_state.card_flipped = False
-                            if st.session_state.current_flashcard_index < len(st.session_state.flashcard_deck) - 1:
-                                st.session_state.current_flashcard_index += 1
-                            else:
-                                st.info(ui.get("flashcard_deck_completed_practice", "Flashcard Deck Completed. Keep practicing!"))
-                                st.session_state.flashcard_deck = []
-                                st.session_state.current_flashcard_index = 0
-                            st.rerun()
-        else:
-            st.info(ui.get("no_flashcards_in_deck", "No flashcards in deck. Click 'Generate Flashcard' to create a new one."))
-
-    elif mode == ui.get("fact_game"):
-        st.header(ui.get("random_fact_game", "Random Fact Game"))
-
-        col1, col2 = st.columns([2, 1])
-
-        with col1:
-            if st.button(ui.get("get_random_fact", "Get Random Fact"), type="primary", use_container_width=True):
-                if "current_fact" in st.session_state:
-                    del st.session_state["current_fact"]
-                
-                with st.spinner(ui.get("finding_interesting_fact", "Finding an interesting fact...")):
-                    fact = generate_random_fact()
-                    if fact.get("status"):
-                        st.session_state.current_fact = fact
-                        st.session_state.fact_start_time = time.time()
-                    else:
-                        st.session_state.current_fact = {"status": False}
-
-        with col2:
-            st.info(f"⏱️ {ui.get('quick_read_challenge', 'Quick Read Challenge')}: 15s")
-
-        if "current_fact" in st.session_state:
-            fact = st.session_state.current_fact
-            
-            if fact.get("status"):
-                elapsed = int(time.time() - st.session_state.get("fact_start_time", time.time()))
-                remaining = max(0, 15 - elapsed)
-
-                if remaining > 0:
-                    st.progress(remaining / 15)
-                    st.markdown(
-                        f"""
-                    <div class="quiz-container">
-                        <h3>🌟 {ui.get('did_you_know', 'Did you know?')}</h3>
-                        <p style="font-size: 18px; line-height: 1.8;">{fact["fact"]}</p>
-                        <p style="margin-top: 20px; color: #666;">{ui.get('topic', 'Topic')}: <strong>{fact["topic"]}</strong></p>
-                    </div>
-                    """,
-                        unsafe_allow_html=True,
-                    )
-                    if st.button(ui.get("interesting_next_fact", "Interesting! Next fact")):
-                        points = st.session_state.score_tracker.add_quiz_result("Fact Game", 1, 1, difficulty)
-                        animated_success(f"{ui.get('knowledge_gained', 'Knowledge gained')}! +{points} {ui.get('points', 'points')}")
-                        del st.session_state["current_fact"]
-                else:
-                    st.success(ui.get("times_up_next_fact", "Time's up! Ready for the next fact?"))
-                    if st.button(ui.get("next_fact", "Next Fact")):
-                        del st.session_state["current_fact"]
-            else:
-                st.error(ui.get("failed_fact_generation", "Failed to generate fact. Please try again."))
-
-    elif mode == ui.get("challenge_mode"):
-        st.header(ui.get("challenge_mode", "Challenge Mode"))
-
-        if not st.session_state.current_challenge_id:
-            tab1, tab2 = st.tabs([ui.get("create_challenge", "Create Challenge"), ui.get("join_challenge", "Join Challenge")])
-
-            with tab1:
-                st.subheader(ui.get("create_new_challenge", "Create a New Challenge"))
-                with st.form("create_challenge_form"):
-                    challenge_topic = st.text_input(ui.get("challenge_topic", "Challenge Topic"), value=st.session_state.topic)
-                    challenge_difficulty = st.selectbox(
-                        ui.get("challenge_difficulty", "Challenge Difficulty"),
-                        list(DIFFICULTY_LEVELS.keys()),
-                        index=list(DIFFICULTY_LEVELS.keys()).index(difficulty),
-                    )
-                    challenge_num_questions = st.selectbox(
-                        ui.get("number_of_questions", "Number of Questions"),
-                        [5, 10, 15],
-                        index=[5, 10, 15].index(st.session_state.get("num_questions", 5)),
-                    )
-                    create_challenge_submitted = st.form_submit_button(ui.get("create_challenge", "Create Challenge"), type="primary")
-
-                    if create_challenge_submitted:
-                        new_challenge_id = st.session_state.challenge_manager.create_challenge(
-                            creator_id=st.session_state.user_id,
-                            topic=challenge_topic,
-                            difficulty=challenge_difficulty,
-                            num_questions=challenge_num_questions
-                        )
-                        st.session_state.challenge_created_id = new_challenge_id
-                        st.success(f"{ui.get('challenge_created', 'Challenge created! Share this ID')}: **{new_challenge_id}**")
-            
-            if st.session_state.challenge_created_id:
-                st.info(f"{ui.get('challenge_id', 'Challenge ID')}: **{st.session_state.challenge_created_id}**")
-                if st.button(ui.get("start_challenge_play", "Start Challenge Play"), key="start_created_challenge"):
-                    st.session_state.current_challenge_id = st.session_state.challenge_created_id
-                    st.session_state.challenge_quiz_questions = generate_quiz_set(
-                        st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)["topic"],
-                        st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)["difficulty"],
-                        st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)["num_questions"]
-                    )
-                    st.session_state.challenge_quiz_started = True
-                    st.session_state.challenge_current_question_index = 0
-                    st.session_state.answered = False
-                    st.session_state.question_start_time = time.time()
-                    st.session_state.hints_used = 0
-                    st.session_state.quiz_results = []
-                    st.session_state.challenge_created_id = None
-                    st.rerun()
-
-            with tab2:
-                st.subheader(ui.get("join_existing_challenge", "Join an Existing Challenge"))
-                with st.form("join_challenge_form"):
-                    join_challenge_id = st.text_input(ui.get("enter_challenge_id", "Enter Challenge ID"))
-                    join_challenge_submitted = st.form_submit_button(ui.get("join_challenge", "Join Challenge"), type="primary")
-
-                    if join_challenge_submitted:
-                        challenge = st.session_state.challenge_manager.get_challenge(join_challenge_id)
-                        if challenge:
-                            st.success(f"{ui.get('joined_challenge', 'Joined challenge')}: {challenge['topic']} ({challenge['difficulty']})")
-                            st.session_state.current_challenge_id = join_challenge_id
-                            st.session_state.challenge_quiz_questions = generate_quiz_set(
-                                challenge["topic"],
-                                challenge["difficulty"],
-                                challenge["num_questions"]
-                            )
-                            st.session_state.challenge_quiz_started = True
-                            st.session_state.challenge_current_question_index = 0
-                            st.session_state.answered = False
-                            st.session_state.question_start_time = time.time()
-                            st.session_state.hints_used = 0
-                            st.session_state.quiz_results = []
-                            st.rerun()
-                        else:
-                            st.error(ui.get("challenge_not_found", "Challenge not found. Please check the ID."))
-        
-        if st.session_state.current_challenge_id:
-            current_challenge = st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)
-            if current_challenge:
-                st.markdown(f"---")
-                st.subheader(f"{ui.get('active_challenge', 'Active Challenge')}: {current_challenge['topic']} ({current_challenge['difficulty']})")
-                st.write(f"{ui.get('created_by', 'Created by')}: {current_challenge['creator_id']}")
-                st.write(f"{ui.get('questions', 'Questions')}: {current_challenge['num_questions']}")
-                
-                st.markdown(f"#### {ui.get('participants', 'Participants')}:")
-                if current_challenge["participants"]:
-                    for participant_id, p_data in current_challenge["participants"].items():
-                        st.write(f"- {participant_id}: {ui.get('score', 'Score')} {p_data['score']} ({ui.get('completed', 'Completed')}: {p_data.get('completed_at', 'N/A')})")
-                else:
-                    st.write(ui.get("no_participants_yet", "No participants yet."))
-                
-                if st.session_state.challenge_quiz_started and st.session_state.challenge_quiz_questions:
-                    current_mcq = st.session_state.challenge_quiz_questions[st.session_state.challenge_current_question_index]
-                    question_number = st.session_state.challenge_current_question_index + 1
-                    total_questions = len(st.session_state.challenge_quiz_questions)
-
-                    st.subheader(f"{ui.get('challenge_question', 'Challenge Question')} {question_number} {ui.get('of', 'of')} {total_questions}")
-
-                    col1, col2, col3 = responsive_columns([1, 1, 1], [1, 1, 1])
-                    with col2:
-                        time_limit = DIFFICULTY_LEVELS[current_challenge['difficulty']]["time_limit"]
-                        st.info(f"⏱️ {ui.get('time_limit', 'Time Limit')}: {time_limit}s")
-                    with col3:
-                        hints_allowed = DIFFICULTY_LEVELS[current_challenge['difficulty']]["hints_allowed"]
-                        st.info(f"💡 {ui.get('hints', 'Hints')}: {hints_allowed}")
-
-                    elapsed_time = int(time.time() - st.session_state.question_start_time)
-                    remaining_time = max(0, time_limit - elapsed_time)
-
-                    if remaining_time > 0 and not st.session_state.answered:
-                        st.progress(remaining_time / time_limit)
-                        st.caption(f"⏱️ {ui.get('time_remaining', 'Time remaining')}: {remaining_time}s")
-
-                        create_quiz_card(current_mcq["question"], current_mcq["options"], key="challenge_answer")
-
-                        if hints_allowed > st.session_state.hints_used:
-                            if st.button(f"💡 {ui.get('get_hint', 'Get Hint')} ({hints_allowed - st.session_state.hints_used} {ui.get('left', 'left')})"):
-                                st.session_state.hints_used += 1
-                                st.info(f"💡 {ui.get('hint', 'Hint')}: {current_mcq['explanation'][:100]}...")
-
-                        col1_btn, col2_btn, col3_btn = st.columns([1, 2, 1])
-                        with col2_btn:
-                            if st.button(ui.get("submit_answer", "Submit Answer"), type="primary", use_container_width=True):
-                                is_correct = st.session_state.challenge_answer == current_mcq["correct_answer"]
-                                st.session_state.answered = True
-                                st.session_state.quiz_results.append({
-                                    "question": current_mcq["question"],
-                                    "user_answer": st.session_state.challenge_answer,
-                                    "correct_answer": current_mcq["correct_answer"],
-                                    "is_correct": is_correct,
-                                    "explanation": current_mcq["explanation"]
-                                })
-                                st.session_state.adaptive_engine.update_performance(is_correct, current_challenge['difficulty'], topic=current_mcq.get("topic"))
-                                if is_correct:
-                                    st.session_state.current_streak += 1
-                                    points = st.session_state.score_tracker.add_quiz_result("Challenge Mode", 1, 1, current_challenge['difficulty'])
-                                    animated_success(f"{ui.get('correct', 'Correct')}! +{points} {ui.get('points', 'points')}")
-                                    st.balloons()
-                                else:
-                                    st.session_state.current_streak = 0
-                                    st.error(f"❌ {ui.get('incorrect', 'Incorrect')}. {ui.get('the_answer_was', 'The answer was')}: {current_mcq['correct_answer']}")
-                                st.info(f"📚 {current_mcq['explanation']}")
-                                st.rerun()
-                    elif st.session_state.answered:
-                        if st.session_state.challenge_current_question_index < total_questions - 1:
-                            if st.button(ui.get("next_question", "Next Question"), type="secondary", use_container_width=True):
-                                st.session_state.challenge_current_question_index += 1
-                                st.session_state.answered = False
-                                st.session_state.question_start_time = time.time()
-                                st.session_state.hints_used = 0
-                                st.rerun()
-                        else:
-                            st.success(ui.get("challenge_quiz_completed", "Challenge Quiz Completed!"))
-                            final_score = sum(1 for r in st.session_state.quiz_results if r['is_correct'])
-                            st.session_state.challenge_manager.update_challenge_score(
-                                st.session_state.current_challenge_id,
-                                st.session_state.user_id,
-                                final_score,
-                                st.session_state.quiz_results
-                            )
-                            st.session_state.challenge_quiz_started = False
-                            st.session_state.challenge_quiz_questions = []
-                            st.session_state.challenge_current_question_index = 0
-                            st.session_state.current_challenge_id = None
-                            st.rerun()
-                    else:
-                        st.error(f"⏱️ {ui.get('times_up', 'Time\'s up!')}")
-                        st.session_state.answered = True
-                        st.session_state.quiz_results.append({
-                            "question": current_mcq["question"],
-                            "user_answer": ui.get("no_answer_timed_out", "No answer (Time's up)"),
-                            "correct_answer": current_mcq["correct_answer"],
-                            "is_correct": False,
-                            "explanation": current_mcq["explanation"]
-                        })
-                        st.session_state.score_tracker.add_quiz_result("Challenge Mode", 0, 1, difficulty)
-                        st.rerun()
-
-    elif mode == ui.get("page_info"):
-        st.header(ui.get("page_information", "Page Information"))
-        st.write(ui.get("get_page_info_prompt", "Get detailed information and images for any topic."))
-
-        info_topic = st.text_input(ui.get("enter_topic_for_info", "Enter Topic for Information"), value=st.session_state.topic)
-        num_images = st.slider(ui.get("number_of_images", "Number of Images"), 0, 5, 1)
-        
-        if st.button(ui.get("get_information", "Get Information"), type="primary"):
-            with st.spinner(f"{ui.get('fetching_information_for', 'Fetching information for')} {info_topic}..."):
-                display_page_info(info_topic, num_images)
-
-    st.divider()
-    st.markdown(f"""
-        <div style='text-align: center'>
-            <p>{ui.get('made_with', 'Made with')} ❤️ {ui.get('using_streamlit_and_wikimedia', 'using Streamlit and Wikimedia APIs')}</p>
-            <p style='opacity: 0.7; font-size: 0.9em;'>{ui.get('app_name', 'TriviaVerse')} v2.0 - {ui.get('enhanced_edition', 'Enhanced Edition')}</p>
-        </div>
-    """, unsafe_allow_html=True)
+# app.py
+"""TriviaVerse Enhanced - Advanced Quiz Application"""
+
+import streamlit as st
+import time
+from datetime import datetime
+import random
+# Removed dotenv import and os import as .env file is not persisting
+# from dotenv import load_dotenv
+# import os
+
+from config.settings import (
+    DIFFICULTY_LEVELS,
+    BADGES,
+    RANDOM_TOPICS,
+)
+from config.themes import THEMES
+from config.languages import SUPPORTED_LANGUAGES
+from modules.mcq_generator import generate_quiz_set
+from modules.flashcard_generator import generate_smart_deck
+from modules.fact_game import generate_random_fact
+from modules.adaptive_engine import AdaptiveEngine
+from utils.ui_components import (
+    apply_custom_theme,
+    display_user_stats,
+    display_badges,
+    create_progress_chart,
+    animated_success,
+    create_quiz_card,
+    render_flashcard,
+)
+from utils.score_tracker import ScoreTracker
+from utils.mobile_responsive import responsive_columns, responsive_css
+from utils.user_auth import init_authentication, authenticate_user
+from utils.challenge_manager import ChallengeManager
+from modules.info_page import display_page_info
+from utils.translator import get_translated_texts
+
+# Removed load_dotenv() call as .env file is not persisting
+# load_dotenv()
+
+# --- Page Config ---
+st.set_page_config(
+    page_title="TriviaVerse",
+    page_icon="🎯",
+    layout="wide",
+    initial_sidebar_state="expanded",
+)
+
+# --- App State Initialization ---
+if "user_id" not in st.session_state:
+    st.session_state.user_id = st.session_state.get("username", f"user_{int(time.time())}")
+if "score_tracker" not in st.session_state:
+    st.session_state.score_tracker = ScoreTracker(st.session_state.user_id)
+if "theme" not in st.session_state:
+    st.session_state.theme = "default"
+if "language" not in st.session_state:
+    st.session_state.language = "en"
+if "topic" not in st.session_state:
+    st.session_state.topic = "Python programming"
+
+# --- Load UI Text based on Language ---
+ui = get_translated_texts(st.session_state.language)
+
+# --- Update Page Title with Translated Text ---
+st.title(f"{ui.get('app_name', 'TriviaVerse')} - {ui.get('enhanced_edition', 'Enhanced Edition')}")
+
+# Initialize other session state variables
+if "current_streak" not in st.session_state:
+    st.session_state.current_streak = 0
+if "adaptive_engine" not in st.session_state:
+    st.session_state.adaptive_engine = AdaptiveEngine(st.session_state.user_id)
+if "answer" not in st.session_state:
+    st.session_state.answer = None
+if "mcq_quiz_questions" not in st.session_state:
+    st.session_state.mcq_quiz_questions = []
+if "current_question_index" not in st.session_state:
+    st.session_state.current_question_index = 0
+if "quiz_started" not in st.session_state:
+    st.session_state.quiz_started = False
+if "quiz_results" not in st.session_state:
+    st.session_state.quiz_results = []
+if "flashcard_deck" not in st.session_state:
+    st.session_state.flashcard_deck = []
+if "current_flashcard_index" not in st.session_state:
+    st.session_state.current_flashcard_index = 0
+if "challenge_manager" not in st.session_state:
+    st.session_state.challenge_manager = ChallengeManager()
+if "current_challenge_id" not in st.session_state:
+    st.session_state.current_challenge_id = None
+if "challenge_quiz_questions" not in st.session_state:
+    st.session_state.challenge_quiz_questions = []
+if "challenge_current_question_index" not in st.session_state:
+    st.session_state.challenge_current_question_index = 0
+if "game_state" not in st.session_state:
+    st.session_state.game_state = "menu"
+if "challenge_created_id" not in st.session_state:
+    st.session_state.challenge_created_id = None
+if "current_page" not in st.session_state:
+    st.session_state.current_page = "home"
+
+# --- Authentication ---
+init_authentication()
+if not authenticate_user():
+    st.stop()
+
+# --- UI Rendering ---
+apply_custom_theme(st.session_state.theme)
+st.markdown(responsive_css(), unsafe_allow_html=True)
+
+def render_homepage():
+    st.markdown(f"""
+        <div class="homepage-container" style="text-align: center;">
+            <h1 class="homepage-title">{ui.get('app_name', 'TriviaVerse')}</h1>
+            <p class="homepage-description">{ui.get('app_description', 'A Dynamic Quiz App')}</p>
+            <br><br>
+    """, unsafe_allow_html=True)
+    
+    if st.button(ui.get('start_your_learning_journey', "Start Your Learning Journey"), key="start_journey"):
+        st.session_state.current_page = "game_modes"
+        st.rerun()
+
+with st.sidebar:
+    st.title(f"🎯 {ui.get('app_name', 'TriviaVerse')}")
+    st.markdown(f"### 🎮 {ui.get('game_settings', 'Game Settings')}")
+
+    if st.button(f"🏠 {ui.get('home', 'Home')}", key="sidebar_home"):
+        st.session_state.current_page = "home"
+        st.rerun()
+
+    st.divider()
+    
+    lang_choice_key = st.selectbox(
+        f"🌐 {ui.get('choose_language', 'Choose Language')}",
+        options=list(SUPPORTED_LANGUAGES.keys()),
+        index=list(SUPPORTED_LANGUAGES.values()).index(st.session_state.language)
+    )
+    if SUPPORTED_LANGUAGES[lang_choice_key] != st.session_state.language:
+        st.session_state.language = SUPPORTED_LANGUAGES[lang_choice_key]
+        st.rerun()
+
+    st.info(f"👤 {ui.get('welcome', 'Welcome')}, {st.session_state.get('username', 'Guest')}!")
+
+    theme_select = st.selectbox(
+        f"🎨 {ui.get('choose_theme', 'Choose Theme')}",
+        list(THEMES.keys()),
+        index=list(THEMES.keys()).index(st.session_state.theme),
+    )
+    if theme_select != st.session_state.theme:
+        st.session_state.theme = theme_select
+        st.rerun()
+
+    st.divider()
+
+    mode = st.radio(
+        f"🎲 {ui.get('select_game_mode', 'Select Game Mode')}",
+        [ui.get(k, k) for k in ["mcq_quiz", "flashcards", "fact_game", "challenge_mode", "page_info"]],
+    )
+
+    use_adaptive = st.checkbox(f"🤖 {ui.get('use_adaptive_difficulty', 'Use Adaptive Difficulty')}", value=True)
+    difficulty = st.session_state.adaptive_engine.get_recommended_difficulty() if use_adaptive else st.selectbox(
+        f"⚡ {ui.get('difficulty_level', 'Difficulty Level')}",
+        list(DIFFICULTY_LEVELS.keys()),
+    )
+    if use_adaptive:
+        st.info(f"{ui.get('recommended', 'Recommended')}: {difficulty}")
+
+    st.markdown(f"### 📖 {ui.get('choose_topic', 'Choose Topic')}")
+    
+    def update_topic_text_input():
+        st.session_state.topic = st.session_state.topic_text_input
+        
+    st.text_input(ui.get("enter_topic", "Enter topic"), value=st.session_state.topic, key="topic_text_input", on_change=update_topic_text_input)
+    
+    def update_random_topic():
+        st.session_state.topic = random.choice(RANDOM_TOPICS)
+
+    if st.button(f"🎲 {ui.get('random_topic', 'Random')}", on_click=update_random_topic):
+        pass # The topic is updated by the on_click callback
+
+    st.markdown(f"### 🔥 {ui.get('trending_topics', 'Trending Topics')}")
+    def update_trending_topic():
+        if st.session_state.trending_topic_select:
+            st.session_state.topic = st.session_state.trending_topic_select
+
+    st.selectbox(ui.get("quick_select", "Quick select"), [""] + RANDOM_TOPICS, key="trending_topic_select", on_change=update_trending_topic)
+
+    if mode in [ui.get("mcq_quiz"), ui.get("challenge_mode")]:
+        st.markdown(f"### 🔢 {ui.get('number_of_questions', 'Number of Questions')}")
+        st.session_state.num_questions = st.selectbox(ui.get("select_number_of_questions", "Select number"), [5, 10, 15], index=1)
+
+    st.divider()
+    st.markdown(f"### 📊 {ui.get('your_stats', 'Your Stats')}")
+    stats = st.session_state.score_tracker.get_stats()
+    display_user_stats(stats, ui)
+
+    if st.button(f"🚪 {ui.get('logout', 'Logout')}", type="secondary", use_container_width=True):
+        st.session_state.clear()
+        st.rerun()
+
+if st.session_state.current_page == "home":
+    render_homepage()
+else:
+    # Header with user dashboard
+    col1, col2 = st.columns([2, 1])
+    with col1:
+        st.markdown(f"<h1 class='app-title'>🎮 {ui.get('app_name', 'TriviaVerse')} - {ui.get('enhanced_edition', 'Enhanced Edition')}</h1>", unsafe_allow_html=True)
+        st.markdown(f"*{ui.get('app_description', 'A gamified learning platform powered by Wikimedia')}*")
+    with col2:
+        # Display current time and greeting
+        current_hour = datetime.now().hour
+        greeting = (
+            ui.get("good_morning", "Good morning")
+            if current_hour < 12
+            else ui.get("good_afternoon", "Good afternoon")
+            if current_hour < 18
+            else ui.get("good_evening", "Good evening")
+        )
+        st.markdown(f"### {greeting}, {st.session_state.get('username', 'Learner')}! 👋")
+        st.caption(f"{datetime.now().strftime('%B %d, %Y - %I:%M %p')}")
+
+    # Display user statistics dashboard
+    stats = st.session_state.score_tracker.get_stats()
+    display_user_stats(stats, ui)
+
+    # Display badges
+    if stats["badges"]:
+        st.markdown(f"### 🏅 {ui.get('your_achievements', 'Your Achievements')}")
+        display_badges(stats["badges"], ui)
+
+    # Progress chart
+    with st.expander(f"📈 {ui.get('view_detailed_progress', 'View Detailed Progress')}", expanded=False):
+        if stats["quizzes_completed"] > 0:
+            fig = create_progress_chart(stats, ui)
+            st.plotly_chart(fig, use_container_width=True)
+        else:
+            st.info(ui.get("complete_quizzes_prompt", "Complete some quizzes to see your progress chart!"))
+
+    st.divider()
+
+    # Main game area
+    if mode == ui.get("mcq_quiz"):
+        st.header(ui.get("mcq_quiz"))
+
+        # Initialize or reset quiz
+        if not st.session_state.quiz_started:
+            if st.button(ui.get("start_new_quiz", "Start New Quiz"), type="primary", use_container_width=True):
+                with st.spinner(ui.get("generating_quiz_questions", "Generating quiz questions...")):
+                    st.session_state.mcq_quiz_questions = generate_quiz_set(
+                        st.session_state.topic,
+                        difficulty,
+                        st.session_state.num_questions
+                    )
+                    if st.session_state.mcq_quiz_questions:
+                        st.session_state.current_question_index = 0
+                        st.session_state.quiz_started = True
+                        st.session_state.answered = False
+                        st.session_state.question_start_time = time.time()
+                        st.session_state.hints_used = 0
+                        st.session_state.quiz_results = [] # Reset quiz results
+                        st.rerun()
+                    else:
+                        st.error(ui.get("failed_quiz_generation", "Failed to generate quiz questions. Please try a different topic."))
+
+        if st.session_state.quiz_started and st.session_state.mcq_quiz_questions:
+            # Display current question
+            current_mcq = st.session_state.mcq_quiz_questions[st.session_state.current_question_index]
+            question_number = st.session_state.current_question_index + 1
+            total_questions = len(st.session_state.mcq_quiz_questions)
+
+            st.subheader(f"{ui.get('question', 'Question')} {question_number} {ui.get('of', 'of')} {total_questions}")
+
+            col1, col2, col3 = responsive_columns([1, 1, 1], [1, 1, 1])
+            with col2:
+                time_limit = DIFFICULTY_LEVELS[difficulty]["time_limit"]
+                st.info(f"⏱️ {ui.get('time_limit', 'Time Limit')}: {time_limit}s")
+            with col3:
+                hints_allowed = DIFFICULTY_LEVELS[difficulty]["hints_allowed"]
+                st.info(f"💡 {ui.get('hints', 'Hints')}: {hints_allowed}")
+
+            # Timer
+            elapsed_time = int(time.time() - st.session_state.question_start_time)
+            remaining_time = max(0, time_limit - elapsed_time)
+
+            if remaining_time > 0 and not st.session_state.answered:
+                st.progress(remaining_time / time_limit)
+                st.caption(f"⏱️ {ui.get('time_remaining', 'Time remaining')}: {remaining_time}s")
+
+                create_quiz_card(
+                    current_mcq["question"],
+                    current_mcq["options"],
+                    key="answer"
+                )
+
+                if hints_allowed > st.session_state.hints_used:
+                    if st.button(f"💡 {ui.get('get_hint', 'Get Hint')} ({hints_allowed - st.session_state.hints_used} {ui.get('left', 'left')})"):
+                        st.session_state.hints_used += 1
+                        st.info(f"💡 {ui.get('hint', 'Hint')}: {current_mcq['explanation'][:100]}...")
+
+                col1_btn, col2_btn, col3_btn = st.columns([1, 2, 1])
+                with col2_btn:
+                    if st.button(ui.get("submit_answer", "Submit Answer"), type="primary", use_container_width=True):
+                        is_correct = st.session_state.answer == current_mcq["correct_answer"]
+                        st.session_state.answered = True
+                        st.session_state.quiz_results.append({
+                            "question": current_mcq["question"],
+                            "user_answer": st.session_state.answer,
+                            "correct_answer": current_mcq["correct_answer"],
+                            "is_correct": is_correct,
+                            "explanation": current_mcq["explanation"]
+                        })
+                        st.session_state.adaptive_engine.update_performance(is_correct, difficulty, topic=current_mcq.get("topic"))
+                        if is_correct:
+                            st.session_state.current_streak += 1
+                            points = st.session_state.score_tracker.add_quiz_result("MCQ Quiz", 1, 1, difficulty)
+                            animated_success(f"{ui.get('correct', 'Correct')}! +{points} {ui.get('points', 'points')}")
+                            st.balloons()
+                        else:
+                            st.session_state.current_streak = 0
+                            st.error(f"❌ {ui.get('incorrect', 'Incorrect')}. {ui.get('the_answer_was', 'The answer was')}: {current_mcq['correct_answer']}")
+                        st.info(f"📚 {current_mcq['explanation']}")
+                        st.rerun()
+            elif st.session_state.answered:
+                if st.session_state.current_question_index < total_questions - 1:
+                    if st.button(ui.get("next_question", "Next Question"), type="secondary", use_container_width=True):
+                        st.session_state.current_question_index += 1
+                        st.session_state.answered = False
+                        st.session_state.question_start_time = time.time()
+                        st.session_state.hints_used = 0
+                        st.rerun()
+                else:
+                    st.success(ui.get("quiz_completed", "Quiz Completed!"))
+                    st.session_state.quiz_started = False
+                    st.session_state.mcq_quiz_questions = []
+                    st.session_state.current_question_index = 0
+                    st.markdown(f"### {ui.get('quiz_results_summary', 'Quiz Results Summary')}")
+                    for i, result in enumerate(st.session_state.quiz_results):
+                        st.markdown(f"**{ui.get('question', 'Question')} {i+1}:** {result['question']}")
+                        if result['is_correct']:
+                            st.success(f"✅ {ui.get('your_answer', 'Your Answer')}: {result['user_answer']} ({ui.get('correct', 'Correct')})")
+                        else:
+                            st.error(f"❌ {ui.get('your_answer', 'Your Answer')}: {result['user_answer']} ({ui.get('incorrect', 'Incorrect')})")
+                            st.info(f"{ui.get('correct_answer', 'Correct Answer')}: {result['correct_answer']}")
+                        st.caption(f"{ui.get('explanation', 'Explanation')}: {result['explanation']}")
+                        st.divider()
+                    if st.button(ui.get("start_new_quiz", "Start New Quiz"), type="primary", use_container_width=True):
+                        st.rerun()
+            else:
+                st.error(f"⏱️ {ui.get('times_up', "Time's up!")}")
+                st.session_state.answered = True
+                st.session_state.quiz_results.append({
+                    "question": current_mcq["question"],
+                    "user_answer": ui.get("no_answer_timed_out", "No answer (Time's up)"),
+                    "correct_answer": current_mcq["correct_answer"],
+                    "is_correct": False,
+                    "explanation": current_mcq["explanation"]
+                })
+                st.session_state.score_tracker.add_quiz_result("MCQ Quiz", 0, 1, difficulty)
+                st.rerun()
+
+    elif mode == ui.get("flashcards"):
+        st.header(ui.get("interactive_flashcards", "Interactive Flashcards"))
+
+        if st.button(ui.get("generate_flashcard", "Generate Flashcard"), type="primary"):
+            with st.spinner(ui.get("creating_flashcard_deck", "Creating flashcard deck...")):
+                st.session_state.flashcard_deck = generate_smart_deck(
+                    st.session_state.topic,
+                    deck_size=10,
+                    difficulty=difficulty,
+                    adaptive_engine=st.session_state.adaptive_engine
+                )
+                if st.session_state.flashcard_deck:
+                    st.session_state.current_flashcard_index = 0
+                    st.session_state.card_flipped = False
+                    st.rerun()
+                else:
+                    st.error(ui.get("failed_flashcard_generation", "Failed to generate flashcards. Please try a different topic."))
+
+        if st.session_state.flashcard_deck:
+            current_flashcard = st.session_state.flashcard_deck[st.session_state.current_flashcard_index]
+            st.subheader(f"{ui.get('flashcard', 'Flashcard')} {st.session_state.current_flashcard_index + 1} {ui.get('of', 'of')} {len(st.session_state.flashcard_deck)}")
+
+            col1, col2, col3 = st.columns([1, 2, 1])
+            with col2:
+                render_flashcard(
+                    current_flashcard["front"],
+                    current_flashcard["back"],
+                    is_flipped=st.session_state.get("card_flipped", False),
+                )
+
+                if not st.session_state.get("card_flipped", False):
+                    if st.button(ui.get("flip_card", "Flip Card"), use_container_width=True):
+                        st.session_state.card_flipped = True
+                        st.rerun()
+                else:
+                    st.write("")
+                    btn_col1, btn_col2 = st.columns(2)
+                    with btn_col1:
+                        if st.button(ui.get("got_it", "Got it!"), use_container_width=True):
+                            st.session_state.adaptive_engine.update_performance(
+                                is_correct=True,
+                                difficulty=current_flashcard.get("difficulty", "Medium"),
+                                item_id=current_flashcard.get("item_id"),
+                                topic=current_flashcard.get("topic")
+                            )
+                            points = st.session_state.score_tracker.add_quiz_result("Flashcards", 1, 1, current_flashcard.get("difficulty", "Medium"))
+                            animated_success(f"{ui.get('great', 'Great')}! +{points} {ui.get('points', 'points')}")
+                            st.session_state.card_flipped = False
+                            if st.session_state.current_flashcard_index < len(st.session_state.flashcard_deck) - 1:
+                                st.session_state.current_flashcard_index += 1
+                            else:
+                                st.success(ui.get("flashcard_deck_completed", "Flashcard Deck Completed!"))
+                                st.session_session.flashcard_deck = []
+                                st.session_state.current_flashcard_index = 0
+                            st.rerun()
+                    with btn_col2:
+                        if st.button(ui.get("need_practice", "Need Practice"), use_container_width=True):
+                            st.session_state.adaptive_engine.update_performance(
+                                is_correct=False,
+                                difficulty=current_flashcard.get("difficulty", "Medium"),
+                                item_id=current_flashcard.get("item_id"),
+                                topic=current_flashcard.get("topic")
+                            )
+                            st.session_state.score_tracker.add_quiz_result("Flashcards", 0, 1, current_flashcard.get("difficulty", "Medium"))
+                            st.session_state.card_flipped = False
+                            if st.session_state.current_flashcard_index < len(st.session_state.flashcard_deck) - 1:
+                                st.session_state.current_flashcard_index += 1
+                            else:
+                                st.info(ui.get("flashcard_deck_completed_practice", "Flashcard Deck Completed. Keep practicing!"))
+                                st.session_state.flashcard_deck = []
+                                st.session_state.current_flashcard_index = 0
+                            st.rerun()
+        else:
+            st.info(ui.get("no_flashcards_in_deck", "No flashcards in deck. Click 'Generate Flashcard' to create a new one."))
+
+    elif mode == ui.get("fact_game"):
+        st.header(ui.get("random_fact_game", "Random Fact Game"))
+
+        col1, col2 = st.columns([2, 1])
+
+        with col1:
+            if st.button(ui.get("get_random_fact", "Get Random Fact"), type="primary", use_container_width=True):
+                if "current_fact" in st.session_state:
+                    del st.session_state["current_fact"]
+                
+                with st.spinner(ui.get("finding_interesting_fact", "Finding an interesting fact...")):
+                    fact = generate_random_fact()
+                    if fact.get("status"):
+                        st.session_state.current_fact = fact
+                        st.session_state.fact_start_time = time.time()
+                    else:
+                        st.session_state.current_fact = {"status": False}
+
+        with col2:
+            st.info(f"⏱️ {ui.get('quick_read_challenge', 'Quick Read Challenge')}: 15s")
+
+        if "current_fact" in st.session_state:
+            fact = st.session_state.current_fact
+            
+            if fact.get("status"):
+                elapsed = int(time.time() - st.session_state.get("fact_start_time", time.time()))
+                remaining = max(0, 15 - elapsed)
+
+                if remaining > 0:
+                    st.progress(remaining / 15)
+                    st.markdown(
+                        f"""
+                    <div class="quiz-container">
+                        <h3>🌟 {ui.get('did_you_know', 'Did you know?')}</h3>
+                        <p style="font-size: 18px; line-height: 1.8;">{fact["fact"]}</p>
+                        <p style="margin-top: 20px; color: #666;">{ui.get('topic', 'Topic')}: <strong>{fact["topic"]}</strong></p>
+                    </div>
+                    """,
+                        unsafe_allow_html=True,
+                    )
+                    if st.button(ui.get("interesting_next_fact", "Interesting! Next fact")):
+                        points = st.session_state.score_tracker.add_quiz_result("Fact Game", 1, 1, difficulty)
+                        animated_success(f"{ui.get('knowledge_gained', 'Knowledge gained')}! +{points} {ui.get('points', 'points')}")
+                        del st.session_state["current_fact"]
+                else:
+                    st.success(ui.get("times_up_next_fact", "Time's up! Ready for the next fact?"))
+                    if st.button(ui.get("next_fact", "Next Fact")):
+                        del st.session_state["current_fact"]
+            else:
+                st.error(ui.get("failed_fact_generation", "Failed to generate fact. Please try again."))
+
+    elif mode == ui.get("challenge_mode"):
+        st.header(ui.get("challenge_mode", "Challenge Mode"))
+
+        if not st.session_state.current_challenge_id:
+            tab1, tab2 = st.tabs([ui.get("create_challenge", "Create Challenge"), ui.get("join_challenge", "Join Challenge")])
+
+            with tab1:
+                st.subheader(ui.get("create_new_challenge", "Create a New Challenge"))
+                with st.form("create_challenge_form"):
+                    challenge_topic = st.text_input(ui.get("challenge_topic", "Challenge Topic"), value=st.session_state.topic)
+                    challenge_difficulty = st.selectbox(
+                        ui.get("challenge_difficulty", "Challenge Difficulty"),
+                        list(DIFFICULTY_LEVELS.keys()),
+                        index=list(DIFFICULTY_LEVELS.keys()).index(difficulty),
+                    )
+                    challenge_num_questions = st.selectbox(
+                        ui.get("number_of_questions", "Number of Questions"),
+                        [5, 10, 15],
+                        index=[5, 10, 15].index(st.session_state.get("num_questions", 5)),
+                    )
+                    create_challenge_submitted = st.form_submit_button(ui.get("create_challenge", "Create Challenge"), type="primary")
+
+                    if create_challenge_submitted:
+                        new_challenge_id = st.session_state.challenge_manager.create_challenge(
+                            creator_id=st.session_state.user_id,
+                            topic=challenge_topic,
+                            difficulty=challenge_difficulty,
+                            num_questions=challenge_num_questions
+                        )
+                        st.session_state.challenge_created_id = new_challenge_id
+                        st.success(f"{ui.get('challenge_created', 'Challenge created! Share this ID')}: **{new_challenge_id}**")
+            
+            if st.session_state.challenge_created_id:
+                st.info(f"{ui.get('challenge_id', 'Challenge ID')}: **{st.session_state.challenge_created_id}**")
+                if st.button(ui.get("start_challenge_play", "Start Challenge Play"), key="start_created_challenge"):
+                    st.session_state.current_challenge_id = st.session_state.challenge_created_id
+                    st.session_state.challenge_quiz_questions = generate_quiz_set(
+                        st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)["topic"],
+                        st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)["difficulty"],
+                        st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)["num_questions"]
+                    )
+                    st.session_state.challenge_quiz_started = True
+                    st.session_state.challenge_current_question_index = 0
+                    st.session_state.answered = False
+                    st.session_state.question_start_time = time.time()
+                    st.session_state.hints_used = 0
+                    st.session_state.quiz_results = []
+                    st.session_state.challenge_created_id = None
+                    st.rerun()
+
+            with tab2:
+                st.subheader(ui.get("join_existing_challenge", "Join an Existing Challenge"))
+                with st.form("join_challenge_form"):
+                    join_challenge_id = st.text_input(ui.get("enter_challenge_id", "Enter Challenge ID"))
+                    join_challenge_submitted = st.form_submit_button(ui.get("join_challenge", "Join Challenge"), type="primary")
+
+                    if join_challenge_submitted:
+                        challenge = st.session_state.challenge_manager.get_challenge(join_challenge_id)
+                        if challenge:
+                            st.success(f"{ui.get('joined_challenge', 'Joined challenge')}: {challenge['topic']} ({challenge['difficulty']})")
+                            st.session_state.current_challenge_id = join_challenge_id
+                            st.session_state.challenge_quiz_questions = generate_quiz_set(
+                                challenge["topic"],
+                                challenge["difficulty"],
+                                challenge["num_questions"]
+                            )
+                            st.session_state.challenge_quiz_started = True
+                            st.session_state.challenge_current_question_index = 0
+                            st.session_state.answered = False
+                            st.session_state.question_start_time = time.time()
+                            st.session_state.hints_used = 0
+                            st.session_state.quiz_results = []
+                            st.rerun()
+                        else:
+                            st.error(ui.get("challenge_not_found", "Challenge not found. Please check the ID."))
+        
+        if st.session_state.current_challenge_id:
+            current_challenge = st.session_state.challenge_manager.get_challenge(st.session_state.current_challenge_id)
+            if current_challenge:
+                st.markdown(f"---")
+                st.subheader(f"{ui.get('active_challenge', 'Active Challenge')}: {current_challenge['topic']} ({current_challenge['difficulty']})")
+                st.write(f"{ui.get('created_by', 'Created by')}: {current_challenge['creator_id']}")
+                st.write(f"{ui.get('questions', 'Questions')}: {current_challenge['num_questions']}")
+                
+                st.markdown(f"#### {ui.get('participants', 'Participants')}:")
+                if current_challenge["participants"]:
+                    for participant_id, p_data in current_challenge["participants"].items():
+                        st.write(f"- {participant_id}: {ui.get('score', 'Score')} {p_data['score']} ({ui.get('completed', 'Completed')}: {p_data.get('completed_at', 'N/A')})")
+                else:
+                    st.write(ui.get("no_participants_yet", "No participants yet."))
+                
+                if st.session_state.challenge_quiz_started and st.session_state.challenge_quiz_questions:
+                    current_mcq = st.session_state.challenge_quiz_questions[st.session_state.challenge_current_question_index]
+                    question_number = st.session_state.challenge_current_question_index + 1
+                    total_questions = len(st.session_state.challenge_quiz_questions)
+
+                    st.subheader(f"{ui.get('challenge_question', 'Challenge Question')} {question_number} {ui.get('of', 'of')} {total_questions}")
+
+                    col1, col2, col3 = responsive_columns([1, 1, 1], [1, 1, 1])
+                    with col2:
+                        time_limit = DIFFICULTY_LEVELS[current_challenge['difficulty']]["time_limit"]
+                        st.info(f"⏱️ {ui.get('time_limit', 'Time Limit')}: {time_limit}s")
+                    with col3:
+                        hints_allowed = DIFFICULTY_LEVELS[current_challenge['difficulty']]["hints_allowed"]
+                        st.info(f"💡 {ui.get('hints', 'Hints')}: {hints_allowed}")
+
+                    elapsed_time = int(time.time() - st.session_state.question_start_time)
+                    remaining_time = max(0, time_limit - elapsed_time)
+
+                    if remaining_time > 0 and not st.session_state.answered:
+                        st.progress(remaining_time / time_limit)
+                        st.caption(f"⏱️ {ui.get('time_remaining', 'Time remaining')}: {remaining_time}s")
+
+                        create_quiz_card(current_mcq["question"], current_mcq["options"], key="challenge_answer")
+
+                        if hints_allowed > st.session_state.hints_used:
+                            if st.button(f"💡 {ui.get('get_hint', 'Get Hint')} ({hints_allowed - st.session_state.hints_used} {ui.get('left', 'left')})"):
+                                st.session_state.hints_used += 1
+                                st.info(f"💡 {ui.get('hint', 'Hint')}: {current_mcq['explanation'][:100]}...")
+
+                        col1_btn, col2_btn, col3_btn = st.columns([1, 2, 1])
+                        with col2_btn:
+                            if st.button(ui.get("submit_answer", "Submit Answer"), type="primary", use_container_width=True):
+                                is_correct = st.session_state.challenge_answer == current_mcq["correct_answer"]
+                                st.session_state.answered = True
+                                st.session_state.quiz_results.append({
+                                    "question": current_mcq["question"],
+                                    "user_answer": st.session_state.challenge_answer,
+                                    "correct_answer": current_mcq["correct_answer"],
+                                    "is_correct": is_correct,
+                                    "explanation": current_mcq["explanation"]
+                                })
+                                st.session_state.adaptive_engine.update_performance(is_correct, current_challenge['difficulty'], topic=current_mcq.get("topic"))
+                                if is_correct:
+                                    st.session_state.current_streak += 1
+                                    points = st.session_state.score_tracker.add_quiz_result("Challenge Mode", 1, 1, current_challenge['difficulty'])
+                                    animated_success(f"{ui.get('correct', 'Correct')}! +{points} {ui.get('points', 'points')}")
+                                    st.balloons()
+                                else:
+                                    st.session_state.current_streak = 0
+                                    st.error(f"❌ {ui.get('incorrect', 'Incorrect')}. {ui.get('the_answer_was', 'The answer was')}: {current_mcq['correct_answer']}")
+                                st.info(f"📚 {current_mcq['explanation']}")
+                                st.rerun()
+                    elif st.session_state.answered:
+                        if st.session_state.challenge_current_question_index < total_questions - 1:
+                            if st.button(ui.get("next_question", "Next Question"), type="secondary", use_container_width=True):
+                                st.session_state.challenge_current_question_index += 1
+                                st.session_state.answered = False
+                                st.session_state.question_start_time = time.time()
+                                st.session_state.hints_used = 0
+                                st.rerun()
+                        else:
+                            st.success(ui.get("challenge_quiz_completed", "Challenge Quiz Completed!"))
+                            final_score = sum(1 for r in st.session_state.quiz_results if r['is_correct'])
+                            st.session_state.challenge_manager.update_challenge_score(
+                                st.session_state.current_challenge_id,
+                                st.session_state.user_id,
+                                final_score,
+                                st.session_state.quiz_results
+                            )
+                            st.session_state.challenge_quiz_started = False
+                            st.session_state.challenge_quiz_questions = []
+                            st.session_state.challenge_current_question_index = 0
+                            st.session_state.current_challenge_id = None
+                            st.rerun()
+                    else:
+                        st.error(f"⏱️ {ui.get('times_up', 'Time\'s up!')}")
+                        st.session_state.answered = True
+                        st.session_state.quiz_results.append({
+                            "question": current_mcq["question"],
+                            "user_answer": ui.get("no_answer_timed_out", "No answer (Time's up)"),
+                            "correct_answer": current_mcq["correct_answer"],
+                            "is_correct": False,
+                            "explanation": current_mcq["explanation"]
+                        })
+                        st.session_state.score_tracker.add_quiz_result("Challenge Mode", 0, 1, difficulty)
+                        st.rerun()
+
+    elif mode == ui.get("page_info"):
+        st.header(ui.get("page_information", "Page Information"))
+        st.write(ui.get("get_page_info_prompt", "Get detailed information and images for any topic."))
+
+        info_topic = st.text_input(ui.get("enter_topic_for_info", "Enter Topic for Information"), value=st.session_state.topic)
+        num_images = st.slider(ui.get("number_of_images", "Number of Images"), 0, 5, 1)
+        
+        if st.button(ui.get("get_information", "Get Information"), type="primary"):
+            with st.spinner(f"{ui.get('fetching_information_for', 'Fetching information for')} {info_topic}..."):
+                display_page_info(info_topic, num_images)
+
+    st.divider()
+    st.markdown(f"""
+        <div style='text-align: center'>
+            <p>{ui.get('made_with', 'Made with')} ❤️ {ui.get('using_streamlit_and_wikimedia', 'using Streamlit and Wikimedia APIs')}</p>
+            <p style='opacity: 0.7; font-size: 0.9em;'>{ui.get('app_name', 'TriviaVerse')} v2.0 - {ui.get('enhanced_edition', 'Enhanced Edition')}</p>
+        </div>
+    """, unsafe_allow_html=True)