# 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

    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 the current PR.
            */
            const { data: pr } =
              await github.rest.pulls.get({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: prNumber
              });

            const headBranch = pr.head.ref;

            core.info(
              `Looking for PR Validation runs on branch "${headBranch}".`
            );

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

            /*
            * Keep only PR Validation runs.
            */
            const validationRuns = runs.filter(
              run => run.name === validationWorkflowName
            );

            /*
             * 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.`
            );

  detector-labels:
    name: Detect detector labels on synchronize
    needs: check-validation
    uses: ./.github/workflows/pr_detector_labels.yaml
    with:
      pr_number: ${{ github.event.pull_request.number }}
    permissions:
      pull-requests: write
      issues: read