import os

labels_dir = "C:/Users/Laurent/Desktop/board-mate/rpi/training/datasets/edges/chess board detection 2.v2i.yolov11"

for filename in os.listdir(labels_dir):
    if not filename.endswith(".txt"):
        continue

    txt_path = os.path.join(labels_dir, filename)
    new_lines = []

    with open(txt_path, "r") as f:
        lines = f.readlines()

    for line in lines:
        parts = line.strip().split()
        if len(parts) < 5:
            continue  # skip invalid lines
        cls = int(parts[0])
        cls -= 1  # subtract 1 from class index
        cls = max(cls, 0)  # ensure no negative indices
        new_lines.append(" ".join([str(cls)] + parts[1:]))

    # Overwrite file with updated indices
    with open(txt_path, "w") as f:
        f.write("\n".join(new_lines))

    print(f"Updated {filename}")

print("All label files have been adjusted!")