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

# Deploy this luxtools plugin checkout into a mounted DokuWiki plugins dir.
# Default target is the user's mount path.
#
# Usage:
#   ./deploy.sh                 # deploy to /thebe/Web/lib/plugins/luxtools/
#   ./deploy.sh --dry-run       # show what would change
#   ./deploy.sh /path/to/luxtools
#   ./deploy.sh --no-delete     # don't delete extraneous files at target
#   ./deploy.sh --preserve-times  # keep source mtimes at target

TARGET="/thebe/Web/lib/plugins/luxtools"
DRY_RUN=0
DELETE=1
PRESERVE_TIMES=0

while (($#)); do
  case "$1" in
    --dry-run|-n)
      DRY_RUN=1
      shift
      ;;
    --no-delete)
      DELETE=0
      shift
      ;;
    --preserve-times)
      PRESERVE_TIMES=1
      shift
      ;;
    -h|--help)
      sed -n '1,80p' "$0"
      exit 0
      ;;
    *)
      TARGET="$1"
      shift
      ;;
  esac
done

if ! command -v rsync >/dev/null 2>&1; then
  echo "Error: rsync is required." >&2
  exit 1
fi

SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Safety checks: make sure source looks like luxtools plugin
if [[ ! -f "$SRC_DIR/plugin.info.txt" ]]; then
  echo "Error: '$SRC_DIR' doesn't look like luxtools (missing plugin.info.txt)." >&2
  exit 1
fi

# Ensure target dir exists
mkdir -p "$TARGET"

# Safety check: refuse to deploy to an obviously wrong directory.
# Allow empty dir (fresh install) OR existing luxtools plugin dir.
if [[ -e "$TARGET/plugin.info.txt" ]]; then
  if ! grep -qi "^base\s\+luxtools" "$TARGET/plugin.info.txt" 2>/dev/null; then
    echo "Error: target '$TARGET' has a plugin.info.txt, but it doesn't look like luxtools." >&2
    echo "Refusing to deploy." >&2
    exit 1
  fi
fi

RSYNC_ARGS=(
  -a
  --human-readable
  --itemize-changes
  --chmod=Du=rwx,Dgo=rx,Fu=rw,Fgo=r
  --exclude=deploy.sh
  --exclude=.git/
  --exclude=_dokuwiki/
  --exclude=_agent-data/
  --exclude=.github/
  --exclude=.vscode/
  --exclude=_test/
  --exclude=deleted.files
  --exclude=*.swp
  --exclude=*.swo
  --exclude=.DS_Store
)

# DokuWiki's combined CSS (lib/exe/css.php) is cached and invalidated based on source file mtimes.
# When deploying to a mounted/remote filesystem with a different clock, preserving mtimes can make
# DokuWiki think the cache is always newer than your plugin CSS. Avoid that by default.
if (( ! PRESERVE_TIMES )); then
  RSYNC_ARGS+=(--no-times --omit-dir-times)
fi

if ((DRY_RUN)); then
  RSYNC_ARGS+=(--dry-run)
fi

if ((DELETE)); then
  RSYNC_ARGS+=(--delete)
fi

echo "Deploying luxtools from: $SRC_DIR/"
echo "Deploying luxtools to:   $TARGET/"

rsync "${RSYNC_ARGS[@]}" "$SRC_DIR/" "$TARGET/"

echo "Done."