name: sonar
on:
  workflow_run:
    workflows:
      - ci
    types:
      - completed
permissions:
  contents: read
  actions: read
  pull-requests: read
  checks: write
  statuses: write
jobs:
  sonar:
    if: |
      github.event.workflow_run.conclusion == 'success' &&
      (github.event.workflow_run.event == 'pull_request' || github.event.workflow_run.event == 'push')
    runs-on: ubuntu-24.04
    steps:
      - name: Collect workflow context
        id: metadata
        uses: actions/github-script@v7
        with:
          script: |
            const run = context.payload.workflow_run;
            const result = {
              event: run.event,
              should_run: 'false',
              is_pr: 'false',
              pr_number: '',
              head_branch: run.head_branch || '',
              base_branch: '',
              head_sha: run.head_sha,
              checkout_repo: (run.head_repository && run.head_repository.full_name) || `${context.repo.owner}/${context.repo.repo}`,
            };

            if (run.event === 'pull_request' && run.pull_requests && run.pull_requests.length > 0) {
              const pr = run.pull_requests[0];
              result.should_run = 'true';
              result.is_pr = 'true';
              result.pr_number = pr.number.toString();
              result.head_branch = pr.head.ref;
              result.base_branch = pr.base.ref;
            } else if (run.event === 'push' && result.head_branch) {
              result.should_run = 'true';
            }

            Object.entries(result).forEach(([key, value]) => core.setOutput(key, value));
      - name: Checkout repository
        if: steps.metadata.outputs.should_run == 'true'
        uses: actions/checkout@v5
        with:
          repository: ${{ steps.metadata.outputs.checkout_repo }}
          ref: ${{ steps.metadata.outputs.head_sha }}
          fetch-depth: 0
      - name: Align GitHub context with upstream run
        if: steps.metadata.outputs.should_run == 'true'
        run: |
          echo "GITHUB_SHA=${{ steps.metadata.outputs.head_sha }}" >> $GITHUB_ENV
          if [ -n "${{ steps.metadata.outputs.head_branch }}" ]; then
            echo "GITHUB_REF_NAME=${{ steps.metadata.outputs.head_branch }}" >> $GITHUB_ENV
          fi
          if [ "${{ steps.metadata.outputs.is_pr }}" = "true" ]; then
            echo "GITHUB_HEAD_REF=${{ steps.metadata.outputs.head_branch }}" >> $GITHUB_ENV
            echo "GITHUB_BASE_REF=${{ steps.metadata.outputs.base_branch }}" >> $GITHUB_ENV
          fi
      - name: Download merged coverage artifact
        if: steps.metadata.outputs.should_run == 'true'
        id: download-coverage
        uses: actions/github-script@v7
        with:
          result-encoding: string
          script: |
            const { owner, repo } = context.repo;
            const runId = context.payload.workflow_run.id;
            const artifactName = 'merged-coverage';

            const artifacts = await github.paginate(github.rest.actions.listWorkflowRunArtifacts, {
              owner,
              repo,
              run_id: runId,
              per_page: 100,
            });

            const artifact = artifacts.find((entry) => entry.name === artifactName);
            if (!artifact) {
              core.setFailed(`Unable to locate artifact '${artifactName}' for workflow run ${runId}.`);
              return;
            }

            const download = await github.rest.actions.downloadArtifact({
              owner,
              repo,
              artifact_id: artifact.id,
              archive_format: 'zip',
            });

            const fs = require('fs');
            const path = require('path');

            const artifactDir = path.join(process.cwd(), 'coverage-artifacts');
            fs.mkdirSync(artifactDir, { recursive: true });

            const filePath = path.join(artifactDir, `${artifactName}.zip`);
            fs.writeFileSync(filePath, Buffer.from(download.data));
            core.setOutput('zip-path', filePath);
      - name: Extract coverage files
        if: steps.metadata.outputs.should_run == 'true'
        run: |
          unzip -o "${{ steps.download-coverage.outputs.zip-path }}" -d coverage-artifacts/unpacked
          shopt -s dotglob
          cp -r coverage-artifacts/unpacked/* ./
      - name: Configure Sonar scanner parameters
        if: steps.metadata.outputs.should_run == 'true'
        run: |
          if [ "${{ steps.metadata.outputs.is_pr }}" = "true" ]; then
            echo "SONAR_SCANNER_ARGS=-Dsonar.pullrequest.key=${{ steps.metadata.outputs.pr_number }} -Dsonar.pullrequest.branch=${{ steps.metadata.outputs.head_branch }} -Dsonar.pullrequest.base=${{ steps.metadata.outputs.base_branch }}" >> $GITHUB_ENV
          else
            echo "SONAR_SCANNER_ARGS=-Dsonar.branch.name=${{ steps.metadata.outputs.head_branch }}" >> $GITHUB_ENV
          fi
      - name: SonarQube Analysis
        if: steps.metadata.outputs.should_run == 'true'
        uses: SonarSource/sonarqube-scan-action@v5
        env:
          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
        with:
          args: ${{ env.SONAR_SCANNER_ARGS }}