# Gitea Actions 工作流：构建 Docker 镜像并通过 SSH 触发部署
# 前置：
#   1. Gitea Runner 已开放 Docker 访问（挂载 /var/run/docker.sock 到容器内）
#   2. 仓库 Secret 中已添加 SSH_PRIVATE_KEY（内容为部署机私钥全文，含 BEGIN/END 行）
#   3. 私钥对应的公钥已加入部署机 ~/.ssh/authorized_keys
name: build-and-deploy

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  DEPLOY_HOST: bh.vps.honor3.com
  DEPLOY_USER: root
  DEPLOY_DIR: /app/registry
  IMAGE_NAME: registry-app

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: 检出代码
        uses: actions/checkout@v4

      - name: 生成镜像 tag（短 commit）
        id: meta
        run: echo "tag=$(echo ${GITHUB_SHA} | cut -c1-8)" >> "$GITHUB_OUTPUT"

      - name: 构建 Docker 镜像
        run: |
          docker build \
            -t "${IMAGE_NAME}:${{ steps.meta.outputs.tag }}" \
            -t "${IMAGE_NAME}:latest" \
            .

      - name: 准备 SSH 私钥
        env:
          SSH_PRIVATE_KEY: ${{ secrets.SSH_PRIVATE_KEY }}
        run: |
          mkdir -p ~/.ssh
          # 写入并去除可能被 secret 引入的 CR，避免 openssh 解析失败
          printf '%s\n' "${SSH_PRIVATE_KEY}" | tr -d '\r' > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          ssh-keyscan -H "${DEPLOY_HOST}" >> ~/.ssh/known_hosts 2>/dev/null
          # 诊断：不打印私钥内容，只打印结构，便于定位 secret 是否损坏
          echo "---私钥文件行数与首末行（不含中间敏感内容）---"
          wc -l ~/.ssh/deploy_key
          head -n 1 ~/.ssh/deploy_key
          tail -n 1 ~/.ssh/deploy_key
          # 通过 ssh-keygen 校验私钥合法性并派生公钥指纹
          ssh-keygen -y -f ~/.ssh/deploy_key > ~/.ssh/deploy_key.pub
          echo "---派生公钥指纹（把公钥追加到部署机 authorized_keys）---"
          ssh-keygen -l -f ~/.ssh/deploy_key.pub
          echo "---派生公钥内容（可直接 append 到部署机 ~/.ssh/authorized_keys）---"
          cat ~/.ssh/deploy_key.pub

      - name: 上传 start.sh 到部署目录
        run: |
          # 强制仅用密钥认证 + 详细日志，password 认证禁用后仍失败会直接抛错
          SSH_OPTS='-i ~/.ssh/deploy_key -o IdentitiesOnly=yes -o PreferredAuthentications=publickey -o BatchMode=yes'
          ssh $SSH_OPTS "${DEPLOY_USER}@${DEPLOY_HOST}" "mkdir -p ${DEPLOY_DIR}"
          scp $SSH_OPTS deploy/start.sh "${DEPLOY_USER}@${DEPLOY_HOST}:${DEPLOY_DIR}/start.sh"
          ssh $SSH_OPTS "${DEPLOY_USER}@${DEPLOY_HOST}" "chmod +x ${DEPLOY_DIR}/start.sh"

      - name: 远程执行部署
        run: |
          SSH_OPTS='-i ~/.ssh/deploy_key -o IdentitiesOnly=yes -o PreferredAuthentications=publickey -o BatchMode=yes'
          ssh $SSH_OPTS "${DEPLOY_USER}@${DEPLOY_HOST}" \
            "IMAGE_TAG=${{ steps.meta.outputs.tag }} ${DEPLOY_DIR}/start.sh"