// ============================================================================
// 087 — Quiz Scoring
// ============================================================================
// Score a quiz and provide a grade.
//
// Run:   soma run 087_quiz_app.cell demo
// Expect:
//   Q1: What is 2+2? Answer: 4 -> Correct!
//   Q2: Capital of France? Answer: Paris -> Correct!
//   Q3: Largest planet? Answer: Mars -> Wrong! (Jupiter)
//   Score: 2/3 (66%)
//   Grade: D

cell QuizApp {

    on demo() {
        let questions = list(
            map("q", "What is 2+2?", "answer", "4", "response", "4"),
            map("q", "Capital of France?", "answer", "Paris", "response", "Paris"),
            map("q", "Largest planet?", "answer", "Jupiter", "response", "Mars")
        )

        let correct = 0
        let total = questions.length
        let num = 1

        for item in questions {
            let num_str = to_string(num)
            if item.response == item.answer {
                print("Q{num_str}: {item.q} Answer: {item.response} -> Correct!")
                correct = correct + 1
            } else {
                print("Q{num_str}: {item.q} Answer: {item.response} -> Wrong! ({item.answer})")
            }
            num = num + 1
        }

        let pct = (correct * 100) / total
        print("Score: {correct}/{total} ({pct}%)")

        // Grade
        let grade = "F"
        if pct >= 90 {
            grade = "A"
        } else {
            if pct >= 80 {
                grade = "B"
            } else {
                if pct >= 70 {
                    grade = "C"
                } else {
                    if pct >= 60 {
                        grade = "D"
                    }
                }
            }
        }
        print("Grade: {grade}")

        return "done"
    }
}