#!/usr/bin/env bash
# 将 dev 合并到 main 并推送（生产分支，不含部署）
# 用法: deploy/git-sync-to-main.sh [merge message]
# 合并后发生产: deploy/deploy-prod.sh
set -euo pipefail

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

GIT_REMOTE="${GIT_REMOTE:-origin}"
DEV_BRANCH="${DEV_BRANCH:-dev_jacy}"
STAGING_BRANCH="${STAGING_BRANCH:-dev}"
PROD_BRANCH="${PROD_BRANCH:-main}"

MERGE_MSG="${1:-merge($STAGING_BRANCH): sync to $PROD_BRANCH}"

cd "$REPO_ROOT"

if [[ -n "$(git status --porcelain)" ]]; then
  echo "ERROR: 工作区有未提交更改，请先 commit 或 stash" >&2
  exit 1
fi

ORIGINAL="$(git branch --show-current)"

echo "==> fetch $GIT_REMOTE"
git fetch "$GIT_REMOTE"

echo "==> checkout $PROD_BRANCH"
git checkout "$PROD_BRANCH"
git pull "$GIT_REMOTE" "$PROD_BRANCH"

echo "==> merge $STAGING_BRANCH -> $PROD_BRANCH"
git merge "$STAGING_BRANCH" -m "$MERGE_MSG"

echo "==> push $PROD_BRANCH"
git push "$GIT_REMOTE" "$PROD_BRANCH"

if git show-ref --verify --quiet "refs/heads/$DEV_BRANCH"; then
  echo "==> checkout $DEV_BRANCH"
  git checkout "$DEV_BRANCH"
elif [[ "$ORIGINAL" != "$PROD_BRANCH" ]]; then
  echo "==> checkout $ORIGINAL"
  git checkout "$ORIGINAL"
fi

echo "==> 完成: $PROD_BRANCH = $(git rev-parse --short HEAD)"
echo "    发生产请执行: bash deploy/deploy-prod.sh"