from flask import Flask, render_template, request, redirect, url_for, session
from flask_session import Session
import json
import random
import os

app = Flask(__name__)
app.secret_key = 'supersecretkey'

# Configure Flask-Session
app.config['SESSION_TYPE'] = 'filesystem'
Session(app)

QUESTIONS_FOLDER = 'questions'

@app.route('/')
def index():
    files = [f for f in os.listdir(QUESTIONS_FOLDER) if f.endswith('.json')]
    return render_template('index.html', files=files)

@app.route('/start', methods=['POST'])
def start():
    session['name'] = request.form['name']
    session['questions'] = []
    session['answers'] = []
    session['score'] = 0
    session['current_question'] = 0

    selected_file = request.form['file']
    session['selected_file'] = selected_file
    file_path = os.path.join(QUESTIONS_FOLDER, selected_file)
    with open(file_path, 'r') as file:
        questions = json.load(file)
        random.shuffle(questions)
        session['questions'] = questions
    return redirect(url_for('quiz'))

@app.route('/quiz', methods=['GET', 'POST'])
def quiz():
    if 'questions' not in session or 'current_question' not in session:
        return redirect(url_for('index'))

    if request.method == 'POST':
        action = request.form.get('action')
        if action == 'next':
            answer = request.form.get('answer')
            if answer:
                session['answers'].append(answer)
                if answer in session['questions'][session['current_question']]['correct']:
                    session['score'] += 1
            session['current_question'] += 1
            if session['current_question'] >= len(session['questions']):
                return redirect(url_for('results'))
        elif action == 'previous':
            session['current_question'] -= 1
            if session['current_question'] < 0:
                session['current_question'] = 0
        elif action == 'end':
            return redirect(url_for('results'))

    return render_template('quiz.html', question=session['questions'][session['current_question']],
                           question_number=session['current_question'] + 1,
                           total_questions=len(session['questions']),
                           selected_file=session['selected_file'])

@app.route('/results')
def results():
    if 'questions' not in session or 'answers' not in session:
        return redirect(url_for('index'))

    total_questions = len(session['questions'])
    score_percentage = (session['score'] / total_questions) * 100

    return render_template('results.html', name=session['name'], score=session['score'],
                           total_questions=total_questions, score_percentage=score_percentage)

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=7860)