name: Post CI Dashboard Link

on:
  workflow_run:
    workflows: ["PR CI"]
    types: [completed]

permissions:
  pull-requests: write

jobs:
  post-link:
    if: github.event.workflow_run.event == 'pull_request'
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/github-script@v7
        with:
          script: |
            const headSha = context.payload.workflow_run.head_sha;
            const runId = context.payload.workflow_run.id;

            const { data: prs } = await github.rest.pulls.list({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'open',
            });

            const pr = prs.find(pr => pr.head.sha === headSha);
            if (!pr) {
              console.log(`No open PR found for SHA ${headSha}, skipping`);
              return;
            }

            // Check if the code quality job failed (causes all test jobs to be skipped)
            const { data: jobsData } = await github.rest.actions.listJobsForWorkflowRun({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: runId,
              per_page: 100,
            });
            const qualityJob = jobsData.jobs.find(j => j.name.includes('Check code quality'));
            const qualityFailed = qualityJob && qualityJob.conclusion === 'failure';

            // Delete any existing dashboard comment before posting a fresh one
            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: pr.number,
            });
            for (const comment of comments) {
              if (comment.body.includes('**CI Observability Dashboard:** [View test results in Grafana]') ||
                  comment.body.includes('**CI Dashboard:** [View test results in Grafana]')) {
                await github.rest.issues.deleteComment({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  comment_id: comment.id,
                });
              }
            }

            const url = `https://transformers-ci.lor-e.huggingface.cool/d/pytest-observability-by-pr/pytest-observability-branch?var-pr=${pr.number}`;
            let body = `**CI Dashboard:** [View test results in Grafana](${url})`;
            if (qualityFailed) {
              body += `\n\n> ⚠️ **Code quality check failed** — all test jobs were skipped. Fix the code quality issues and push again to run tests.`;
            }
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: pr.number,
              body,
            });