name: Check cpp / md pair

on:
  push:

permissions:
  contents: read

jobs:
  check-and-analyze:
    name: Check md headers
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check md headers for changed cpp files
        env:
          BEFORE: ${{ github.event.before }}
          AFTER: ${{ github.event.after }}
        run: |
          set -euo pipefail

          if [ "$BEFORE" = "0000000000000000000000000000000000000000" ]; then
            CHANGED_FILES=$(git diff --name-only --diff-filter=ACMR 4b825dc642cb6eb9a060e54bf8d69288fbee4904 "$AFTER" || true)
          else
            CHANGED_FILES=$(git diff --name-only --diff-filter=ACMR "$BEFORE" "$AFTER" || true)
          fi

          # 仅保留根目录下的 .cpp 文件（路径中不含 "/"）
          mapfile -t CPP_FILES < <(printf '%s\n' "$CHANGED_FILES" | grep -E '^[^/]+\.cpp$' || true)

          : > /tmp/cpp_files.txt
          for f in "${CPP_FILES[@]}"; do
            [ -n "$f" ] && printf '%s\n' "$f" >> /tmp/cpp_files.txt
          done

          if [ "${#CPP_FILES[@]}" -eq 0 ]; then
            echo "本次 push 没有根目录下的 .cpp 文件，跳过检查与分析。"
            exit 0
          fi

          echo "本次 push 中根目录下的 .cpp 文件："
          printf '  %s\n' "${CPP_FILES[@]}"

          EXIT_CODE=0
          for cpp_file in "${CPP_FILES[@]}"; do
            [ -z "$cpp_file" ] && continue

            base=$(basename "$cpp_file" .cpp)
            md_file="${base}.md"

            if [ -f "$md_file" ]; then
              FIRST_LINE=$(head -n 1 "$md_file")

              if [[ "$FIRST_LINE" != "# ${base} "* ]]; then
                echo "::error file=${md_file},line=1::Markdown 第一行格式错误。期望以 '# ${base} ' 开头，实际为: ${FIRST_LINE}"
                EXIT_CODE=1
              else
                echo "✅ ${md_file} 第一行格式正确: ${FIRST_LINE}"
              fi
            else
              echo "⏭️ ${cpp_file} 没有对应的 ${md_file}，跳过 md 标题检查。"
            fi
          done

          exit $EXIT_CODE

      # - name: Submit changed cpp files for analysis
      #   env:
      #     API_KEY: ${{ secrets.API_KEY }}
      #   run: |
      #     set -euo pipefail

      #     API_BASE="https://oia.vblg.top"

      #     if [ ! -s /tmp/cpp_files.txt ]; then
      #       echo "没有需要分析的 .cpp 文件。"
      #       exit 0
      #     fi

      #     while IFS= read -r cpp_file; do
      #       [ -z "$cpp_file" ] && continue
      #       echo "提交分析: $cpp_file"

      #       BASE=$(basename "$cpp_file" .cpp)
      #       CODE=$(cat "$cpp_file")

      #       PAYLOAD=$(jq -n \
      #         --arg problem_id "$BASE" \
      #         --arg problem "" \
      #         --arg code "$CODE" \
      #         --arg notes "" \
      #         --arg language "cpp17" \
      #         '{
      #           problem_id: $problem_id,
      #           problem: $problem,
      #           code: $code,
      #           notes: $notes,
      #           language: $language
      #         }')

      #       HTTP_CODE=$(curl -sS -o /tmp/resp.json -w "%{http_code}" \
      #         -X POST "${API_BASE}/api/v1/analyze" \
      #         -H "Authorization: Bearer ${API_KEY}" \
      #         -H "Content-Type: application/json" \
      #         -d "$PAYLOAD")

      #       if [ "$HTTP_CODE" != "202" ]; then
      #         echo "::error file=${cpp_file}::提交分析失败 (HTTP ${HTTP_CODE})"
      #         cat /tmp/resp.json || true
      #         exit 1
      #       fi

      #       echo "已提交: $(cat /tmp/resp.json)"
      #     done < /tmp/cpp_files.txt