name: Aggregate Test Status

on:
  status:

permissions:
  statuses: write

jobs:
  aggregate:
    if: >-
      github.event.context == 'direct-test-completed'
      && github.event.state == 'success'
    runs-on: ubuntu-latest
    steps:
      - name: Check and update aggregate status
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
        with:
          script: |
            const sha = context.payload.sha;

            const { data } = await github.rest.repos.getCombinedStatusForRef({
              owner: context.repo.owner,
              repo: context.repo.repo,
              ref: sha,
              per_page: 100,
            });

            // Buildkite derives the GitHub context prefix from the label emoji.
            // Keep hard Full Suite lanes in test-tube/bar-chart namespaces and
            // Fastcheck lanes in microscope so targeted reruns cannot clear the
            // wrong aggregate status. Automatic PR jobs use pr-fastcheck while
            // slash-command and Full Suite jobs use ci; normalize the suffix
            // and keep the newest status for each logical lane.
            const FASTCHECK_PREFIXES = [
              'buildkite/pr-fastcheck/microscope-',
              'buildkite/ci/microscope-',
            ];
            const FULL_SUITE_PREFIXES = [
              'buildkite/ci/test-tube-',
              'buildkite/ci/bar-chart-',
            ];

            function newestByLane(prefixes) {
              const statuses = new Map();
              for (const status of data.statuses) {
                const prefix = prefixes.find(p => status.context.startsWith(p));
                if (!prefix) continue;
                const lane = status.context.slice(prefix.length);
                const previous = statuses.get(lane);
                if (!previous || Date.parse(status.updated_at) > Date.parse(previous.updated_at)) {
                  statuses.set(lane, status);
                }
              }
              return statuses;
            }

            const fastcheck = newestByLane(FASTCHECK_PREFIXES);
            const fullSuiteOnly = newestByLane(FULL_SUITE_PREFIXES);
            const fastcheckPassed =
              fastcheck.size === 6
              && [...fastcheck.values()].every(s => s.state === 'success');
            const fullSuitePassed =
              fastcheckPassed
              && fullSuiteOnly.size === 14
              && [...fullSuiteOnly.values()].every(s => s.state === 'success');

            if (fastcheckPassed) {
              core.info(
                `All ${fastcheck.size} fastcheck tests passed — updating fastcheck-passed`
              );
              await github.rest.repos.createCommitStatus({
                owner: context.repo.owner,
                repo: context.repo.repo,
                sha,
                state: 'success',
                context: 'fastcheck-passed',
                description: `All ${fastcheck.size} fastcheck tests passed`,
              });
            }

            if (fullSuitePassed) {
              core.info(
                'All 20 full suite tests passed — updating full-suite-passed'
              );
              await github.rest.repos.createCommitStatus({
                owner: context.repo.owner,
                repo: context.repo.repo,
                sha,
                state: 'success',
                context: 'full-suite-passed',
                description: 'All 20 full suite tests passed',
              });
            }