name: PR Format Notification
on:
  pull_request_target:
    types: [opened]


concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

permissions:
  pull-requests: write
  contents: read

jobs:
  notify-format:
    if: github.repository_owner == 'RT-Thread'
    runs-on: ubuntu-latest
    steps:
      - name: Check if first commit and add comment
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "Event action: ${{ github.event.action }}"
          
          # 获取 PR 的提交信息
          commits=$(curl -s \
            -H "Accept: application/vnd.github.v3+json" \
            -H "Authorization: Bearer $GITHUB_TOKEN" \
            "https://api.github.com/repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}/commits")

          # 检查 API 响应是否为数组
          if echo "$commits" | jq -e 'type == "array"' > /dev/null; then
            commit_count=$(echo "$commits" | jq '. | length')
            echo "PR commit count: $commit_count"

            should_comment=false
            if [ "${{ github.event.action }}" = "opened" ]; then
              should_comment=true
            elif [ "${{ github.event.action }}" = "synchronize" ] && [ "$commit_count" -eq 1 ]; then
              should_comment=true
            fi

            if [ "$should_comment" = true ]; then
              echo "Adding format notification comment..."
              
              # 构建工作流链接
              branch="${{ github.event.pull_request.head.ref }}"
              fork_repo="${{ github.event.pull_request.head.repo.full_name }}"
              workflow_url="https://github.com/${fork_repo}/actions/workflows/pr_clang_format.yml"
              direct_link="${workflow_url}?branch=${branch}"

              # 使用数组存储多行消息
              message_lines=(
                "<!-- PR Format Notification Comment -->"
                "**👋 感谢您对 RT-Thread 的贡献！Thank you for your contribution to RT-Thread!**"
                ""
                "为确保代码符合 RT-Thread 的编码规范，请在你的仓库中执行以下步骤运行代码格式化工作流（如果格式化CI运行失败）。"
                "To ensure your code complies with RT-Thread's coding style, please run the code formatting workflow by following the steps below (If the formatting of CI fails to run)."
                ""
                "---"
                ""
                "### 🛠 操作步骤 | Steps"
                ""
                "1. **前往 Actions 页面 | Go to the Actions page**"
                "[点击进入工作流 → | Click to open workflow →](${direct_link})"
                ""
                "2. **点击 \`Run workflow\` | Click \`Run workflow\`**"
                "- 设置需排除的文件/目录（目录请以\"/\"结尾）"
                "Set files/directories to exclude (directories should end with \"/\")"
                "- 将目标分支设置为 \ Set the target branch to：**\`${branch}\`**"
                "- 设置PR number为 \ Set the PR number to：**\`${{ github.event.pull_request.number }}\`**"
                ""
                "3. **等待工作流完成 | Wait for the workflow to complete**"
                "格式化后的代码将自动推送至你的分支。"
                "The formatted code will be automatically pushed to your branch."
                ""
                "完成后，提交将自动更新至 \`${branch}\` 分支，关联的 Pull Request 也会同步更新。"
                "Once completed, commits will be pushed to the \`${branch}\` branch automatically, and the related Pull Request will be updated."
                ""
                "如有问题欢迎联系我们，再次感谢您的贡献！💐"
                "If you have any questions, feel free to reach out. Thanks again for your contribution!"
              )
              
              # 拼接数组为多行字符串
              message=$(printf "%s\n" "${message_lines[@]}")

              echo "Message content:"
              echo "$message"

              # 查找现有的 bot 评论
              existing_comment=$(curl -s \
                -H "Accept: application/vnd.github.v3+json" \
                -H "Authorization: Bearer $GITHUB_TOKEN" \
                "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments" | \
                jq -r '.[] | select(.user.login == "github-actions[bot]" and (.body | contains("<!-- PR Format Notification Comment -->"))) | {id: .id, body: .body} | @base64')

              # 使用 jq 安全地构建 JSON 负载
              json_payload=$(jq -n --arg body "$message" '{"body": $body}')

              if [[ -n "$existing_comment" ]]; then
                # 更新现有评论
                comment_id=$(echo "$existing_comment" | head -1 | base64 -d | jq -r .id)
                echo "Updating existing comment $comment_id"
                response=$(curl -s -w "\n%{http_code}" \
                  -X PATCH \
                  -H "Accept: application/vnd.github.v3+json" \
                  -H "Authorization: Bearer $GITHUB_TOKEN" \
                  -d "$json_payload" \
                  "https://api.github.com/repos/${{ github.repository }}/issues/comments/$comment_id")
              else
                # 创建新评论
                echo "Creating new comment"
                response=$(curl -s -w "\n%{http_code}" \
                  -X POST \
                  -H "Accept: application/vnd.github.v3+json" \
                  -H "Authorization: Bearer $GITHUB_TOKEN" \
                  -d "$json_payload" \
                  "https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments")
              fi

              # 提取 HTTP 状态码和响应体
              http_code=$(echo "$response" | tail -n1)
              response_body=$(echo "$response" | sed '$d')

              if [ "$http_code" -eq 201 ] || [ "$http_code" -eq 200 ]; then
                echo "Format notification comment added/updated successfully"
                echo "Comment URL: $(echo "$response_body" | jq -r '.html_url')"
              else
                echo "Failed to add/update comment. HTTP status: $http_code"
                echo "Response: $response_body"
                exit 1
              fi
            else
              echo "Not the first commit, skipping comment"
            fi
          else
            echo "Failed to get commits from GitHub API"
            echo "Response: $commits"
            exit 1
          fi