#!/bin/sh
set -eu

REPO_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
cd "${REPO_ROOT}"

VERSION_FILE="./version"
if [ ! -f "${VERSION_FILE}" ]; then
  if git cat-file -e "HEAD:version" 2>/dev/null; then
    echo "[bump-version] version file missing in workspace, restoring from HEAD" >&2
    git show "HEAD:version" > "${VERSION_FILE}"
  else
    echo "[bump-version] version file not found: ${VERSION_FILE}" >&2
    exit 1
  fi
fi

CURRENT_VERSION="$(cat "${VERSION_FILE}")"
NEXT_VERSION="$(printf '%s' "${CURRENT_VERSION}" | awk -F. -v OFS=. '
  NF==1 { print ++$NF; next }
  {
    $NF=sprintf("%0*d", length($NF), ($NF+1))
    print
  }')"

printf '%s\n' "${NEXT_VERSION}" > "${VERSION_FILE}"
echo "[bump-version] ${CURRENT_VERSION} -> ${NEXT_VERSION}"

git add "${VERSION_FILE}"
if git diff --cached --quiet; then
  echo "[bump-version] no changes staged, skipping commit"
  exit 0
fi

AUTHOR_NAME="${GIT_AUTHOR_NAME:-woodpecker}"
AUTHOR_EMAIL="${GIT_AUTHOR_EMAIL:-ci@sendico.io}"
git config user.name "${AUTHOR_NAME}"
git config user.email "${AUTHOR_EMAIL}"

git commit -m "chore(ci): bump version to ${NEXT_VERSION}"

BRANCH="${WOODPECKER_BRANCH:-}"
if [ -z "${BRANCH}" ] || [ "${BRANCH}" = "HEAD" ]; then
  BRANCH="$(git rev-parse --abbrev-ref HEAD)"
fi

git push origin "HEAD:${BRANCH}"