evaluation.py

def evaluate_answers(quiz: dict, answers: dict) -> dict:
    questions = quiz["questions"]
    total = len(questions)
    correct_count = 0
    details = []

    for i, q in enumerate(questions):

        user_ans = str(answers.get(i, "")).strip().lower()
        correct_ans = str(q.get("answer", "")).strip().lower()
        q_type = q.get("type", "")

        # Check empty answer first
        if user_ans == "":
            is_correct = False

        # For descriptive questions
        elif q_type in ("Short Answer", "Fill in the Blank"):

            # Accept if either string contains the other
            is_correct = (
                correct_ans in user_ans or
                user_ans in correct_ans
            )

        # For objective questions
        else:
            is_correct = user_ans == correct_ans

        # Count correct answers
        if is_correct:
            correct_count += 1

        # Store result details
        details.append({
            "correct": is_correct,
            "correct_answer": q.get("answer", "N/A"),
            "explanation": q.get("explanation", ""),
        })

    # Calculate percentage
    score_pct = round((correct_count / total) * 100) if total > 0 else 0

    # Feedback generation
    if score_pct == 100:
        feedback = "🌟 Perfect score! Outstanding work!"

    elif score_pct >= 80:
        feedback = "🎉 Excellent! You have a strong grasp of the material."

    elif score_pct >= 60:
        feedback = "👍 Good effort! Review the questions you missed to reinforce your understanding."

    elif score_pct >= 40:
        feedback = "📖 Keep practising. Revisit the study material for the topics you found tricky."

    else:
        feedback = "💪 Don't give up! Go back to the study notes and try again — you'll improve."

    return {
        "score_percent": score_pct,
        "correct": correct_count,
        "total": total,
        "feedback": feedback,
        "details": details,
    }