# ======================================================================================
# Workflow: Close Stale Fix PRs
# ======================================================================================
# Usage:
#   - This workflow runs daily and closes agent-opened CI fix PRs that have been
#     open for more than 3 days.
#
# Expected Output:
#   - Any open PR whose branch matches the oz-agent-fix/run-* convention and that
#     was opened more than 3 days ago will be closed with an explanatory comment.
#
# ======================================================================================

name: Close Stale Fix PRs
on:
  schedule:
    - cron: '0 12 * * *' # 8am EST
  workflow_dispatch:

jobs:
  close-stale-fix-prs:
    runs-on: ubuntu-latest
    steps:
      - name: Close Stale Fix PRs
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
        with:
          script: |
            const { owner, repo } = context.repo;
            const staleCutoffMs = 3 * 24 * 60 * 60 * 1000; // 3 days in milliseconds
            const now = Date.now();

            // Paginate through all open PRs to find ones matching the branch convention
            const openPRs = await github.paginate(github.rest.pulls.list, {
              owner,
              repo,
              state: 'open',
              per_page: 100,
            });

            const staleFixPRs = openPRs.filter(pr => {
              const branchMatches = /^oz-agent-fix\/run-/.test(pr.head.ref);
              const openedAt = new Date(pr.created_at).getTime();
              const isStale = (now - openedAt) > staleCutoffMs;
              return branchMatches && isStale;
            });

            if (staleFixPRs.length === 0) {
              console.log('No stale fix PRs found.');
              return;
            }

            console.log(`Found ${staleFixPRs.length} stale fix PR(s). Closing them...`);

            for (const pr of staleFixPRs) {
              const ageMs = now - new Date(pr.created_at).getTime();
              const ageDays = Math.floor(ageMs / (24 * 60 * 60 * 1000));
              console.log(`Closing PR #${pr.number} (branch: ${pr.head.ref}, open for ${ageDays} day(s)): ${pr.title}`);

              await github.rest.issues.createComment({
                owner,
                repo,
                issue_number: pr.number,
                body: `Closing this automated CI fix PR because it has been open for more than 3 days (${ageDays} day(s)) without being merged. Please review the underlying CI failures manually if they are still relevant.`,
              });

              await github.rest.pulls.update({
                owner,
                repo,
                pull_number: pr.number,
                state: 'closed',
              });
            }

            console.log('Done.');