SEVERITY_WEIGHTS = {
    "comedone": 1,
    "papules": 2,
    "pustules": 2,
    "nodules": 3,
}


def calculate_severity(summary):
    total_score = sum(
        count * SEVERITY_WEIGHTS.get(cls, 1)
        for cls, count in summary.items()
    )

    if total_score == 0:
        level = "clear"
        description = "Wajah bersih dari jerawat"
    elif total_score <= 9:
        level = "mild"
        description = "Jerawat ringan, dapat diatasi dengan skincare rutin"
    elif total_score <= 19:
        level = "moderate"
        description = "Jerawat sedang, disarankan menggunakan obat topikal"
    else:
        level = "severe"
        description = "Jerawat parah, segera konsultasi ke dokter kulit"

    return {
        "score": total_score,
        "level": level,
        "description": description,
    }


def get_degree(severity_level: str) -> str:
    """Map severity level ke degree (Ringan/Sedang/Berat) sesuai jurnal."""
    mapping = {
        "clear": "bersih",
        "mild": "ringan",
        "moderate": "sedang",
        "severe": "berat",
    }
    return mapping.get(severity_level, "ringan")