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

# Non-destructive data sync (files only) between environments.
# It updates changed files and copies new files, but never deletes destination files.
#
# Usage:
#   scripts/ops/netgescon-data-sync-nondestructive.sh \
#     --from /home/michele/netgescon/netgescon-laravel/storage/app/amministratori \
#     --to /var/www/netgescon/storage/app/amministratori
#
# Add --dry-run for preview.

FROM_DIR=""
TO_DIR=""
DRY_RUN="no"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --from)
      FROM_DIR="$2"
      shift 2
      ;;
    --to)
      TO_DIR="$2"
      shift 2
      ;;
    --dry-run)
      DRY_RUN="yes"
      shift 1
      ;;
    *)
      echo "Unknown option: $1"
      echo "Usage: $0 --from <source-dir> --to <dest-dir> [--dry-run]"
      exit 1
      ;;
  esac
done

if [[ -z "$FROM_DIR" || -z "$TO_DIR" ]]; then
  echo "Usage: $0 --from <source-dir> --to <dest-dir> [--dry-run]"
  exit 1
fi

if [[ ! -d "$FROM_DIR" ]]; then
  echo "Error: source directory not found: $FROM_DIR"
  exit 1
fi

mkdir -p "$TO_DIR"

RSYNC_ARGS=(
  -avh
  --update
  --checksum
  --no-owner
  --no-group
  --exclude=.git/
  --exclude=node_modules/
  --exclude=vendor/
  --exclude=bootstrap/cache/
)

if [[ "$DRY_RUN" == "yes" ]]; then
  RSYNC_ARGS+=(--dry-run)
fi

# Trailing slash on source to copy contents into destination.
rsync "${RSYNC_ARGS[@]}" "$FROM_DIR/" "$TO_DIR/"

echo "Sync completed (non-destructive)."
if [[ "$DRY_RUN" == "yes" ]]; then
  echo "Dry-run mode: no file changed."
fi