name: Conformance Test

on:
  pull_request:

permissions:
  contents: read

jobs:
  conformance:
    runs-on: ubuntu-latest

    steps:
      - name: Check out code
        uses: actions/checkout@v6
        with:
          # Fetch full history to access merge-base
          fetch-depth: 0

      - name: Set up Go
        uses: actions/setup-go@v6
        with:
          go-version-file: "go.mod"

      - name: Download dependencies
        run: go mod download

      - name: Run conformance test
        id: conformance
        run: |
          # Run conformance test, capture stdout for summary
          script/conformance-test > conformance-summary.txt 2>&1 || true
          
          # Output the summary
          cat conformance-summary.txt
          
          # Check result
          if grep -q "RESULT: ALL TESTS PASSED" conformance-summary.txt; then
            echo "status=passed" >> $GITHUB_OUTPUT
          else
            echo "status=differences" >> $GITHUB_OUTPUT
          fi

      - name: Generate Job Summary
        run: |
          # Add the full markdown report to the job summary
          echo "# MCP Server Conformance Report" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Comparing PR branch against merge-base with \`origin/main\`" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          
          # Extract and append the report content (skip the header since we added our own)
          tail -n +5 conformance-report/CONFORMANCE_REPORT.md >> $GITHUB_STEP_SUMMARY
          
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "---" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          
          # Add interpretation note
          if [ "${{ steps.conformance.outputs.status }}" = "passed" ]; then
            echo "✅ **All conformance tests passed** - No behavioral differences detected." >> $GITHUB_STEP_SUMMARY
          else
            echo "⚠️ **Differences detected** - Review the diffs above to ensure changes are intentional." >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "Common expected differences:" >> $GITHUB_STEP_SUMMARY
            echo "- New tools/toolsets added" >> $GITHUB_STEP_SUMMARY
            echo "- Tool descriptions updated" >> $GITHUB_STEP_SUMMARY
            echo "- Capability changes (intentional improvements)" >> $GITHUB_STEP_SUMMARY
          fi