from typing import Dict
from core.config import settings


def classify_defect(area: float, length: float, area_ratio: float) -> Dict[str, str]:
    """
    Classify defect severity based on geometric features.

    Args:
        area: Pixel area of defect
        length: Contour length of defect
        area_ratio: Area relative to image

    Returns:
        Dictionary with severity and decision
    """

    # Thresholds (move to config later if needed)
    CRITICAL_AREA_RATIO = 0.01
    CRITICAL_LENGTH = 180

    MODERATE_AREA_RATIO = 0.003
    MODERATE_LENGTH = 60

    # Critical defects
    if area_ratio > CRITICAL_AREA_RATIO or length > CRITICAL_LENGTH:
        severity = "Critical"
        decision = "FAIL"

    # Moderate defects
    elif area_ratio > MODERATE_AREA_RATIO or length > MODERATE_LENGTH:
        severity = "Moderate"
        decision = "REVIEW"

    # Minor defects
    else:
        severity = "Minor"
        decision = "PASS"

    return {
        "severity": severity,
        "decision": decision
    }