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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
DIST_DIR="${DIST_DIR:-${REPO_ROOT}/dist}"
RELEASE_REPO_URL="${RELEASE_REPO_URL:-https://git.halonice.com/yuanzhen869/shunt-rules-release.git}"
TARGET_BRANCH="${TARGET_BRANCH:-main}"
COMMIT_MESSAGE="${COMMIT_MESSAGE:-chore: release dist}"

if [[ ! -d "${DIST_DIR}" ]]; then
  echo "dist directory not found: ${DIST_DIR}" >&2
  exit 1
fi

tmp_dir="$(mktemp -d)"
cleanup() {
  rm -rf "${tmp_dir}"
}
trap cleanup EXIT

work_dir="${tmp_dir}/release"
git clone --branch "${TARGET_BRANCH}" --single-branch "${RELEASE_REPO_URL}" "${work_dir}" >/dev/null

find "${work_dir}" -mindepth 1 -maxdepth 1 ! -name '.git' -exec rm -rf {} +
if command -v rsync >/dev/null 2>&1; then
  rsync -a "${DIST_DIR}/" "${work_dir}/"
else
  cp -a "${DIST_DIR}/." "${work_dir}/"
fi

cd "${work_dir}"
git add -A
if git diff --cached --quiet; then
  echo "no changes in dist, skip release"
  exit 0
fi

git -c user.name="shunt-rules-bot" -c user.email="shunt-rules-bot@local" commit -m "${COMMIT_MESSAGE}" >/dev/null
git push origin "${TARGET_BRANCH}"
echo "release pushed to ${RELEASE_REPO_URL} (${TARGET_BRANCH})"