import cv2
import numpy as np
import logging
from typing import List, Dict, Any

# Configure logging
logging.basicConfig(
    filename="app.log",
    level=logging.INFO,
    format="%(asctime)s - %(levelname)s - %(message)s"
)

def overlay_boxes(frame: np.ndarray, detected_items: List[Dict[str, Any]]) -> np.ndarray:
    """
    Overlay bounding boxes and labels on the frame for detected items.
    Args:
        frame: Input frame in BGR format.
        detected_items: List of detected items with coordinates and labels.
    Returns:
        np.ndarray: Frame with overlaid bounding boxes and labels.
    """
    if not isinstance(frame, np.ndarray) or frame.size == 0:
        logging.error("Invalid input frame provided to overlay_service.")
        return frame
    if not isinstance(detected_items, list):
        logging.error("Detected items must be a list.")
        return frame

    try:
        for item in detected_items:
            if "box" not in item or "type" not in item or "severity" not in item:
                logging.warning(f"Skipping item without box, type, or severity: {item}")
                continue

            x_min, y_min, x_max, y_max = map(int, item["box"])
            severity = item["severity"]
            if item["type"] == "crack":
                color = (0, 0, 255) if severity == "Severe" else (0, 255, 255) if severity == "Moderate" else (0, 255, 0) if severity == "Minor" else (255, 165, 0)
                label = f"Crack: {severity}"
            else:  # Hole
                color = (255, 0, 0) if severity == "Severe" else (255, 255, 0) if severity == "Moderate" else (0, 128, 0)
                label = f"Hole: {severity}"
            cv2.rectangle(frame, (x_min, y_min), (x_max, y_max), color, 2)
            cv2.putText(frame, label, (x_min, y_min - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.5, color, 2)

        logging.info(f"Overlaid {len(detected_items)} items on frame.")
        return frame
    except Exception as e:
        logging.error(f"Error overlaying boxes: {str(e)}")
        return frame