name: Code Format with Clang-Format

on:
  workflow_dispatch:
    inputs:
      branch:
        description: "PR 分支名称\nPR branch name"
        required: true
        type: string
      exclude_patterns:
        description: "排除文件/目录 (以逗号间隔)\n Files/Directories to exclude(comma-separated)"
        required: false
        default: ''

concurrency:
  group: ${{ github.workflow }}-${{ inputs.branch || github.ref }}
  cancel-in-progress: true

permissions:
  contents: write
  pull-requests: read

jobs:
  format-code:
    if: |
      github.repository_owner != 'RT-Thread'
    runs-on: ubuntu-latest
    env:
      HEAD_OWNER: ${{ github.repository_owner }}
      SOURCE_REPOSITORY: ${{ github.repository }}
      TARGET_BRANCH: ${{ inputs.branch }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.branch }}
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}
          lfs: false

      - name: Install clang-format
        run: sudo apt-get update && sudo apt-get install -y clang-format

      - name: Check clang-format version
        run: |
          echo "📋 clang-format version information:"
          clang-format --version
          echo "📋 Detailed version info:"
          clang-format -version
          # 检查支持的功能
          echo "📋 Checking supported features..."
          clang-format --help | grep -i "align\|consecutive" || echo "No align/consecutive options found"

      - name: Get PR info and changed files
        id: get-pr-info
        run: |
          max_retries=3
          retry_count=0
          changed_files=""
          api_response=""

          # fork 查询父仓库中的 PR，独立镜像则查询当前仓库
          repository=$(curl -sS \
            -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github+json" \
            "https://api.github.com/repos/${SOURCE_REPOSITORY}")
          UPSTREAM_REPOSITORY=$(jq -r '.parent.full_name // .full_name // empty' <<<"$repository")

          if [ -z "$UPSTREAM_REPOSITORY" ]; then
            echo "Error: Failed to determine the pull request repository"
            echo "API response: $repository"
            exit 1
          fi

          echo "Using PR repository: $UPSTREAM_REPOSITORY"
          echo "upstream_repository=$UPSTREAM_REPOSITORY" >> "$GITHUB_OUTPUT"

          # 根据当前仓库所有者和所选分支自动查找上游 PR
          pull_requests=$(curl -sS -G \
            -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github+json" \
            --data-urlencode "state=open" \
            --data-urlencode "head=${HEAD_OWNER}:${TARGET_BRANCH}" \
            "https://api.github.com/repos/${UPSTREAM_REPOSITORY}/pulls")

          if ! jq -e 'type == "array"' <<<"$pull_requests" >/dev/null; then
            echo "Error: Failed to query the upstream pull request"
            echo "API response: $pull_requests"
            exit 1
          fi

          pr_count=$(jq 'length' <<<"$pull_requests")
          if [ "$pr_count" -ne 1 ]; then
            echo "Error: Expected exactly one open PR for ${HEAD_OWNER}:${TARGET_BRANCH}, found $pr_count"
            jq -r '.[] | "PR #\(.number): \(.html_url)"' <<<"$pull_requests"
            exit 1
          fi

          PR_NUMBER=$(jq -r '.[0].number' <<<"$pull_requests")
          PR_AUTHOR=$(jq -r '.[0].user.login' <<<"$pull_requests")
          PR_AUTHOR_ID=$(jq -r '.[0].user.id' <<<"$pull_requests")
          PR_AUTHOR_EMAIL="${PR_AUTHOR_ID}+${PR_AUTHOR}@users.noreply.github.com"
          echo "Matched upstream PR #$PR_NUMBER"
          echo "pr_number=$PR_NUMBER" >> "$GITHUB_OUTPUT"
          echo "pr_author=$PR_AUTHOR" >> "$GITHUB_OUTPUT"
          echo "pr_author_email=$PR_AUTHOR_EMAIL" >> "$GITHUB_OUTPUT"

          echo "Fetching changed files for PR #$PR_NUMBER..."

          while [ $retry_count -lt $max_retries ]; do
            # 使用一个curl调用同时获取响应内容和状态码
            api_response=$(curl -s -w "\n%{http_code}" \
              -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github.v3+json" \
            "https://api.github.com/repos/${UPSTREAM_REPOSITORY}/pulls/$PR_NUMBER/files")

            # 分离HTTP状态码和响应内容
            http_status=$(echo "$api_response" | tail -1)
            api_response=$(echo "$api_response" | sed '$d')

            echo "HTTP Status: $http_status"

            # 检查HTTP状态码
            if [ "$http_status" -ne 200 ]; then
              echo "Retry $((retry_count+1)): HTTP $http_status - API response error"
              echo "API Response: $api_response"
              sleep 5
              ((retry_count++))
              continue
            fi

            # 验证响应是否为有效JSON且包含文件数组
            if jq -e 'if type=="array" then .[0].filename else empty end' <<<"$api_response" >/dev/null 2>&1; then
              changed_files=$(jq -r '.[].filename' <<<"$api_response")
              break
            else
              echo "Retry $((retry_count+1)): API response not ready or invalid format"
              echo "API Response: $api_response"
              sleep 5
              ((retry_count++))
            fi
          done

          if [ -z "$changed_files" ]; then
            echo "Error: Failed to get changed files after $max_retries attempts"
            echo "Final API Response: $api_response"
            exit 1
          fi

          # 将文件列表转换为逗号分隔格式
          changed_files_comma=$(echo "$changed_files" | tr '\n' ',' | sed 's/,$//')

          echo "Successfully fetched $(echo "$changed_files" | wc -l) changed files"

          # 设置输出
          echo "all_changed_files=$changed_files_comma" >> $GITHUB_OUTPUT
          echo "changed_files_count=$(echo "$changed_files" | wc -l)" >> $GITHUB_OUTPUT

      - name: Find source files to format
        id: find-files
        run: |
          # 获取PR中修改的文件
          CHANGED_FILES="${{ steps.get-pr-info.outputs.all_changed_files }}"
          
          # 将逗号分隔的文件列表转换为换行分隔
          CHANGED_FILES_LINES=$(echo "$CHANGED_FILES" | tr ',' '\n')
          
          # 美化打印PR中修改的文件
          echo "📋 PR中修改的文件列表:"
          echo "┌───────────────────────────────────────────────────────"
          count=1
          while IFS= read -r file; do
            if [ -n "$file" ]; then
              echo "│ $count. $file"
              ((count++))
            fi
          done <<< "$CHANGED_FILES_LINES"
          echo "└───────────────────────────────────────────────────────"
          echo "总共修改了 $((count-1)) 个文件"
          
          # 如果没有修改的文件，退出
          if [ -z "$CHANGED_FILES" ]; then
            echo "❌ PR中没有修改的文件"
            echo "files_count=0" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # 继续使用CHANGED_FILES进行后续处理
          CHANGED_FILES="$CHANGED_FILES_LINES"
          
          # 过滤出需要格式化的源文件（扩展clang-format支持的文件类型）
          FILES=""
          while IFS= read -r file; do
            if [ -n "$file" ] && [[ "$file" =~ \.(cpp|h|c|hpp|cc|hh|C|H|cp|cxx|hxx|inc|inl|ipp|tpp|txx)$ ]]; then
              FILES="$FILES$file"$'\n'
            fi
          done <<< "$CHANGED_FILES"
          
          FILES=$(echo "$FILES" | sort | uniq)
          
          # 处理排除模式
          EXCLUDE_PATTERNS="${{ github.event.inputs.exclude_patterns }}"
          if [ -n "$EXCLUDE_PATTERNS" ] && [ -n "$FILES" ]; then
            IFS=',' read -ra PATTERNS <<< "$EXCLUDE_PATTERNS"
            for pattern in "${PATTERNS[@]}"; do
              pattern=$(echo "$pattern" | xargs)  # 去除空格
              if [ -n "$pattern" ]; then
                # 去除末尾的斜杠（如果有）
                pattern=${pattern%/}
                echo "排除模式: $pattern"
                # 使用 grep 过滤排除模式
                FILES=$(echo "$FILES" | grep -v "$pattern" || echo "$FILES")
              fi
            done
          fi
          
          if [ -z "$FILES" ]; then
            echo "❌ 没有需要格式化的文件（可能都被排除了）"
            echo "files_count=0" >> $GITHUB_OUTPUT
            exit 0
          fi
          
          # 显示找到的文件用于调试
          echo "🎯 需要格式化的文件:"
          echo "┌───────────────────────────────────────────────────────"
          count=1
          while IFS= read -r file; do
            if [ -n "$file" ]; then
              echo "│ $count. $file"
              ((count++))
            fi
          done <<< "$FILES"
          echo "└───────────────────────────────────────────────────────"
          
          FILE_COUNT=$(echo "$FILES" | wc -l)
          echo "找到 $FILE_COUNT 个需要格式化的文件"
          echo "files_count=$FILE_COUNT" >> $GITHUB_OUTPUT
          
          # 将文件列表保存为多行输出
          echo "files_list<<EOF" >> $GITHUB_OUTPUT
          echo "$FILES" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Clean up temporary files
        run: |
          rm -f changed_files.txt
          rm -f format_files.sh
          echo "✅ 临时文件清理完成"
          
      - name: Format code with clang-format
        if: steps.find-files.outputs.files_count != '0'
        run: |
          echo "开始格式化代码..."
          FILES="${{ steps.find-files.outputs.files_list }}"
          
          # 使用clang-format批量格式化文件
          echo "$FILES" | xargs -I {} sh -c '
            file="{}"
            if [ -f "$file" ]; then
              echo "📝 格式化: $file"
              clang-format -style=file -i "$file"
              if [ $? -eq 0 ]; then
                echo "✅ 格式化成功: $file"
              else
                echo "❌ 格式化失败: $file"
                exit 1
              fi
            else
              echo "⚠️  文件不存在: $file"
            fi
          '
          
          echo "✅ 代码格式化完成"
          
      - name: Check for changes
        id: check-changes
        run: |
          if git diff --quiet; then
            echo "✅ 代码无需格式化"
            echo "has_changes=false" >> $GITHUB_OUTPUT
          else
            echo "📋 检测到格式化更改:"
            git diff --name-only
            echo "has_changes=true" >> $GITHUB_OUTPUT
          fi
          
      - name: Commit and push changes
        if: steps.check-changes.outputs.has_changes == 'true'
        run: |
          PR_AUTHOR="${{ steps.get-pr-info.outputs.pr_author }}"
          PR_AUTHOR_EMAIL="${{ steps.get-pr-info.outputs.pr_author_email }}"

          git config --local user.name "$PR_AUTHOR"
          git config --local user.email "$PR_AUTHOR_EMAIL"

          git add -A
          git commit -m "style: format code with clang-format"
          git push origin "HEAD:refs/heads/${TARGET_BRANCH}"

          echo "✅ 格式化结果已作为独立提交推送到分支 ${TARGET_BRANCH}"
          
      - name: Summary
        run: |
          echo "=== 格式化总结 ==="
          echo "分支: ${TARGET_BRANCH}"
          echo "PR 仓库: ${{ steps.get-pr-info.outputs.upstream_repository }}"
          echo "上游 PR: #${{ steps.get-pr-info.outputs.pr_number }}"
          echo "排除模式: ${{ github.event.inputs.exclude_patterns || '无' }}"
          echo "处理文件数: ${{ steps.find-files.outputs.files_count }}"
          echo "有更改: ${{ steps.check-changes.outputs.has_changes }}"
          echo "clang-format 版本: $(clang-format --version | head -1)"