import sys
from PIL import Image
from pyzbar.pyzbar import decode

def decode_barcode_from_file(image_path):
    """
    Decodes all barcodes found in a specified image file.

    Args:
        image_path (str): The file path to the barcode image.

    Returns:
        list: A list of decoded strings, or None if an error occurs.
    """
    try:
        # Open the image file using Pillow (PIL)
        img = Image.open(image_path)
        
        # Decode all barcodes found in the image
        barcodes = decode(img)

        if not barcodes:
            print(f"❌ No barcode found in the image: {image_path}")
            return None
        
        print(f"✅ Found {len(barcodes)} barcode(s) in {image_path}:")
        decoded_results = []
        
        for i, barcode in enumerate(barcodes):
            # The decoded data is returned as bytes, so we decode it to a string.
            data = barcode.data.decode('utf-8')
            
            # Print the details
            print("-" * 30)
            print(f"Barcode #{i + 1}")
            print(f"  Type: {barcode.type}")
            print(f"  Data: {data}")
            
            # The 'rect' and 'polygon' attributes provide location data, 
            # useful for images with multiple barcodes.
            # print(f"  Location (Rect): {barcode.rect}") 
            
            decoded_results.append(data)

        return decoded_results

    except FileNotFoundError:
        print(f"❌ Error: Image file not found at '{image_path}'")
        return None
    except Exception as e:
        print(f"❌ An error occurred during decoding: {e}")
        return None

if __name__ == "__main__":
    # Ensure the script is called with an image file path
    if len(sys.argv) < 2:
        print("Usage: python decode_barcode.py <path_to_barcode_image>")
        print("Example: python decode_barcode.py 20251017_22h35m26s_grim.png")
        sys.exit(1)

    # Get the image path from command-line arguments
    barcode_image_path = sys.argv[1]

    # Run the decoder function
    decode_barcode_from_file(barcode_image_path)