# This workflow is triggered when a PR is synchronized.
# It checks the latest PR Validation result for the PR.
# If PR Validation has not completed or was unsuccessful, this workflow fails.
# If PR Validation succeeded, it calls the detector label workflow.

name: PR Synchronize Trigger

on:
  pull_request:
    types:
      - synchronize

permissions:
  actions: read
  pull-requests: read

jobs:
  check-validation:
    name: Check PR Validation
    runs-on: ubuntu-latest

    outputs:
      should_run_detector_labels: ${{ steps.check.outputs.should_run_detector_labels }}

    steps:
      - name: Check PR Validation result
        id: check
        uses: actions/github-script@v8
        with:
          script: |
            const prNumber =
              context.payload.pull_request.number;

            const validationWorkflowName =
              'PR Validation';

            /*
             * Get recent workflow runs for PR Validation.
             */
            const { data } =
              await github.rest.actions.listWorkflowRunsForRepo({
                owner: context.repo.owner,
                repo: context.repo.repo,
                event: 'pull_request',
                per_page: 100
              });

            /*
             * Find PR Validation runs associated with this PR.
             */
            const validationRuns = data.workflow_runs.filter(run =>
              run.name === validationWorkflowName &&
              run.pull_requests?.some(
                pr => pr.number === prNumber
              )
            );

            /*
             * No PR Validation run means validation has not
             * been performed for this PR.
             */
            if (validationRuns.length === 0) {
              core.setFailed(
                `No PR Validation run found for PR #${prNumber}.`
              );
              return;
            }

            /*
             * Use the most recent PR Validation run.
             */
            const validationRun = validationRuns.sort(
              (a, b) =>
                new Date(b.created_at) -
                new Date(a.created_at)
            )[0];

            core.info(
              `Latest PR Validation run: ${validationRun.id}`
            );

            core.info(
              `Status: ${validationRun.status}`
            );

            core.info(
              `Conclusion: ${validationRun.conclusion}`
            );

            /*
             * PR Validation must have completed.
             */
            if (validationRun.status !== 'completed') {
              core.setFailed(
                `PR Validation for PR #${prNumber} has not completed. Current status: ${validationRun.status}.`
              );
              return;
            }

            /*
             * PR Validation must have succeeded.
             */
            if (validationRun.conclusion !== 'success') {
              core.setFailed(
                `PR Validation for PR #${prNumber} did not succeed. Conclusion: ${validationRun.conclusion}.`
              );
              return;
            }

            /*
             * PR Validation succeeded.
             */
            core.info(
              `PR Validation for PR #${prNumber} succeeded. Running detector labels.`
            );

            core.setOutput(
              'should_run_detector_labels',
              'true'
            );

  detector-labels:
    name: Detect detector labels on synchronize
    needs: check-validation

    if: >
      ${{
        needs.check-validation.outputs.should_run_detector_labels == 'true'
      }}

    uses: ./.github/workflows/pr_detector_labels.yaml

    with:
      pr_number: ${{ github.event.pull_request.number }}

    permissions:
      pull-requests: write
      issues: read