From f0a70c256f6a6ecde6c3ae1f41849ee78a59fc8c Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Sun, 22 Mar 2026 03:08:31 +0000
Subject: [PATCH] Add image_processing/src/image_processing/cli.py

---
 image_processing/src/image_processing/cli.py | 81 ++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 image_processing/src/image_processing/cli.py

diff --git a/image_processing/src/image_processing/cli.py b/image_processing/src/image_processing/cli.py
new file mode 100644
index 0000000..5abf421
--- /dev/null
+++ b/image_processing/src/image_processing/cli.py
@@ -0,0 +1,81 @@
+import argparse
+import sys
+from pathlib import Path
+import logging
+
+import numpy as np
+import cv2  # noqa: F401 (used indirectly by core)
+
+from image_processing.core import process_images
+
+
+def _validate_input_path(input_path: Path) -> Path:
+    if not input_path.exists() or not input_path.is_dir():
+        raise FileNotFoundError(f"Input path '{input_path}' does not exist or is not a directory.")
+    return input_path
+
+
+def _validate_output_path(output_path: Path) -> Path:
+    parent = output_path.parent
+    if not parent.exists():
+        parent.mkdir(parents=True, exist_ok=True)
+    return output_path
+
+
+def _collect_images_from_dir(directory: Path) -> list[str]:
+    image_files = sorted(
+        [str(p) for p in directory.glob('*.jpg') if p.is_file()]
+    )
+    if not image_files:
+        raise ValueError(f"No .jpg images found in directory '{directory}'.")
+    return image_files
+
+
+def main() -> None:
+    """Command-line entry point for image processing stacker."""
+    parser = argparse.ArgumentParser(
+        description="Process and stack long-exposure images."
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zum Ordner mit Eingabebildern.",
+    )
+    parser.add_argument(
+        "--output",
+        required=True,
+        help="Pfad zur Ausgabedatei für das Ergebnisbild.",
+    )
+
+    args = parser.parse_args()
+
+    logging.basicConfig(
+        level=logging.INFO,
+        format="[%(asctime)s] %(levelname)s:%(name)s: %(message)s",
+    )
+    logger = logging.getLogger("image_processing.cli")
+
+    try:
+        input_path = _validate_input_path(Path(args.input))
+        output_path = _validate_output_path(Path(args.output))
+        image_files = _collect_images_from_dir(input_path)
+
+        logger.info("Processing %d images from %s", len(image_files), input_path)
+        result_image = process_images(image_files)
+
+        if not isinstance(result_image, np.ndarray):
+            raise TypeError("process_images did not return a numpy.ndarray")
+
+        success = cv2.imwrite(str(output_path), result_image)
+        if not success:
+            raise IOError(f"Failed to write output image to '{output_path}'.")
+
+        logger.info("Stacked image written to %s", output_path)
+
+    except Exception as e:
+        logger.error("Error: %s", e)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()