"""Command-line interface for Project 03."""

from rules import recommend_lesson


def get_yes_no(message: str) -> bool:
    """Read a yes-or-no response safely."""

    while True:
        answer = input(message).strip().lower()

        if answer in {"yes", "y"}:
            return True

        if answer in {"no", "n"}:
            return False

        print("Please enter yes or no.")


def main() -> None:
    print("\nAi Learning Path Recommender")
    print("-" * 32)

    experience = input(
        "Experience level: Beginner, Intermediate or Advanced: "
    )

    goal = input(
        "Learning goal: Machine Learning, Generative Ai or Computer Vision: "
    )

    knows_python = get_yes_no("Do you know basic Python? Yes/No: ")

    completed_text = input(
        "Enter completed topics separated by commas: "
    )

    completed_topics = [
        topic.strip()
        for topic in completed_text.split(",")
        if topic.strip()
    ]

    lesson, reason = recommend_lesson(
        experience=experience,
        goal=goal,
        knows_python=knows_python,
        completed_topics=completed_topics,
    )

    print("\nRecommended next lesson:")
    print(lesson)

    print("\nReason:")
    print(reason)


if __name__ == "__main__":
    main()