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

if [[ $# -lt 1 ]]; then
  echo "Usage: $0 <tag> [release-branch] [repo ...]" >&2
  exit 1
fi

VERSION="$1"
shift

if [[ $# -gt 0 && "$1" =~ ^v[0-9]+-dev$ ]]; then
  RELEASE_BRANCH="$1"
  shift
else
  RELEASE_BRANCH="${RELEASE_BRANCH:-$(git rev-parse --abbrev-ref HEAD)}"
fi

case "$VERSION" in
  v6.*) EXPECTED_BRANCH="v6-dev" ;;
  v8.*) EXPECTED_BRANCH="v8-dev" ;;
  *)
    echo "Only v6.* and v8.* tags are allowed, current: ${VERSION}" >&2
    exit 1
    ;;
esac

if [[ "$RELEASE_BRANCH" != "$EXPECTED_BRANCH" ]]; then
  echo "Tag ${VERSION} must be released from ${EXPECTED_BRANCH}, current: ${RELEASE_BRANCH}" >&2
  exit 1
fi

BASEPATH="$(cd "$(dirname "$0")"; cd ../plugin/; pwd)"
REPOS=("$@")

remote() {
  local name="$1"
  local url="$2"
  if git remote get-url "$name" >/dev/null 2>&1; then
    git remote set-url "$name" "$url"
  else
    git remote add "$name" "$url"
  fi
}

push_split_release() {
  local repo="$1"
  local prefix="plugin/${repo}"
  local sha1 remote_tag

  sha1="$(.github/splitsh-lite-linux --prefix="$prefix")"
  echo "Release ${prefix} => ${sha1}, branch ${RELEASE_BRANCH}, tag ${VERSION}"

  git push "$repo" "${sha1}:refs/heads/${RELEASE_BRANCH}" -f

  remote_tag="$(git ls-remote --tags "$repo" "refs/tags/${VERSION}" | awk '{print $1}' || true)"
  if [[ -n "$remote_tag" ]]; then
    if [[ "$remote_tag" == "$sha1" ]]; then
      echo "Tag ${VERSION} already exists on ${repo} at ${sha1}, skip."
      return
    fi
    echo "Tag ${VERSION} already exists on ${repo} at ${remote_tag}, expected ${sha1}. Refuse to overwrite." >&2
    exit 1
  fi

  git push "$repo" "${sha1}:refs/tags/${VERSION}"
}

if [[ ${#REPOS[@]} -eq 0 ]]; then
  while IFS= read -r repo; do
    REPOS+=("$repo")
  done < <(find "$BASEPATH" -mindepth 1 -maxdepth 1 -type d -exec basename {} \; | sort)
fi

for repo in "${REPOS[@]}"; do
  remote "$repo" "git@github.com:zoujingli/${repo}.git"
  push_split_release "$repo"
done