name: PR合并自动部署

on:
  pull_request:
    branches:
      - main
    types:
      - closed

concurrency:
  group: production-deploy
  cancel-in-progress: false

jobs:
  release-check:
    if: ${{ github.event.pull_request.merged == true }}
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - name: 检出 main
        env:
          REPOSITORY_URL: http://117.72.28.96:8765/Jacky/Hulumath-Web.git
        run: git clone --branch main --single-branch "$REPOSITORY_URL" .

      - name: 检查发布文件和脚本语法
        run: |
          set -eu
          test -f requirements.txt
          test -f backend/manage.py
          test -f deploy/hulumath-web.service
          test -f scripts/deploy_production.sh
          test -f scripts/smoke_production.py
          bash -n scripts/deploy_production.sh
          python3 -m compileall -q backend scripts
          git diff-tree --check -m -r HEAD

  deploy:
    if: ${{ github.event.pull_request.merged == true }}
    needs:
      - release-check
    runs-on: ubuntu-latest
    timeout-minutes: 25
    steps:
      - name: 配置 SSH 环境
        env:
          DEPLOY_SSH_KEY: ${{ secrets.DEPLOY_SSH_KEY }}
          DEPLOY_HOST: ${{ secrets.DEPLOY_HOST }}
        run: |
          set -eu
          mkdir -p ~/.ssh
          printf '%s\n' "$DEPLOY_SSH_KEY" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          timeout 10 ssh-keyscan -H "$DEPLOY_HOST" >> ~/.ssh/known_hosts

      - name: 远程执行 Django 部署
        env:
          DEPLOY_HOST: ${{ secrets.DEPLOY_HOST }}
          DEPLOY_USER: ${{ secrets.DEPLOY_USER }}
        run: |
          ssh -T -i ~/.ssh/deploy_key \
            "$DEPLOY_USER@$DEPLOY_HOST" <<'EOF'

          set -Eeuo pipefail

          PROJECT="/www/wwwroot/Hulumath-Web"
          REPOSITORY_URL="http://117.72.28.96:8765/Jacky/Hulumath-Web.git"
          PYTHON_BIN="/www/server/pyporject_evn/versions/3.12.13/bin/python3"

          exec 9>/tmp/hulumath-production-deploy.lock
          if ! flock -n 9; then
            echo "已有部署正在执行，本次退出"
            exit 1
          fi

          echo "========================================"
          echo "开始部署 Django 生产版"
          echo "项目目录: $PROJECT"
          echo "========================================"

          cd "$PROJECT"
          git config --global --add safe.directory "$PROJECT" || true

          if [ ! -d .git ]; then
            echo "当前目录不是 Git 仓库"
            exit 1
          fi

          PREVIOUS_REVISION="$(git rev-parse HEAD)"

          echo "获取远程 main..."
          git remote set-url origin "$REPOSITORY_URL"
          git fetch origin main
          git reset --hard origin/main

          chmod +x scripts/deploy_production.sh

          PROJECT_DIR="$PROJECT" \
          PYTHON_BIN="$PYTHON_BIN" \
          PREVIOUS_REVISION="$PREVIOUS_REVISION" \
          DEPLOY_SMOKE_BASE_URL="http://127.0.0.1:4321" \
          DEPLOY_SMOKE_WS_URL="ws://127.0.0.1:4321/ws/health/" \
            bash scripts/deploy_production.sh

          echo "========================================"
          echo "部署完成"
          echo "========================================"

          EOF

      - name: 从 Runner 验证 Nginx 健康状态
        env:
          DEPLOY_HOST: ${{ secrets.DEPLOY_HOST }}
          DEPLOY_PUBLIC_HOST: 117.72.28.96
        run: |
          curl --fail --silent --show-error \
            --retry 5 \
            --retry-delay 2 \
            --header "Host: $DEPLOY_PUBLIC_HOST" \
            "http://$DEPLOY_HOST:4321/health/" \
            | grep -q '"status": "ok"'