"""
Step 1: Scan a restored FCCS backup directory for drawer IDs.

Every subdirectory in the backup root corresponds to a drawer.
Writes the sorted list of drawer IDs to the configured drawer_id_file.
"""

import os
import sys

from fccs_config import parse_args, load_config, make_logger


def main():
    args = parse_args()
    cfg = load_config(args.config)
    log = make_logger(cfg.get("paths", "log_file"))

    backup_dir = cfg.get("paths", "backup_dir")
    output_file = cfg.get("paths", "drawer_id_file")

    if not os.path.isdir(backup_dir):
        log(f"ERROR: backup directory not found: {backup_dir}")
        sys.exit(1)

    drawer_ids = sorted(
        name for name in os.listdir(backup_dir)
        if os.path.isdir(os.path.join(backup_dir, name))
    )

    with open(output_file, "w", encoding="utf-8") as f:
        for did in drawer_ids:
            f.write(did + "\n")

    log(f"Found {len(drawer_ids)} drawers, written to {output_file}")


if __name__ == "__main__":
    main()