#!/usr/bin/env bash
set -euo pipefail

usage() {
  echo "Usage: $0 [--keep] [dest_dir]" >&2
  echo "  --keep   keep original .log files after backup" >&2
  echo "  dest_dir optional destination directory (default: logs)" >&2
}

move_logs=true
if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
  usage
  exit 0
fi
if [[ "${1:-}" == "--keep" ]]; then
  move_logs=false
  shift
fi

DEST_DIR="${1:-logs}"
TS="$(date +"%Y%m%d_%H%M%S")"
mkdir -p "$DEST_DIR"

found=false
for f in *.log; do
  if [[ -f "$f" ]]; then
    found=true
    base="${f%.log}"
    target="$DEST_DIR/${base}_${TS}.log"
    cp "$f" "$target"
    if $move_logs; then
      rm "$f"
    fi
  fi
done

if ! $found; then
  echo "No .log files found in repo root."
fi