name: "Lock Stale Issues"

on:
  schedule:
    # 8am Pacific = 1pm UTC (2pm UTC during DST)
    - cron: "0 14 * * *"
  workflow_dispatch:

permissions:
  issues: write

concurrency:
  group: lock-threads

jobs:
  lock-closed-issues:
    runs-on: ubuntu-latest
    steps:
      - name: Lock closed issues after 7 days of inactivity
        uses: actions/github-script@v7
        with:
          script: |
            const sevenDaysAgo = new Date();
            sevenDaysAgo.setDate(sevenDaysAgo.getDate() - 7);
            const cutoff = sevenDaysAgo.toISOString().split('T')[0];

            const lockComment = `This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.`;

            const query = `repo:${context.repo.owner}/${context.repo.repo} is:issue is:closed is:unlocked updated:<${cutoff}`;
            console.log(`Search query: ${query}`);

            const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
            const MAX_PER_RUN = 250;
            const processed = new Set();
            let totalLocked = 0;

            while (totalLocked < MAX_PER_RUN) {
              const { data } = await github.rest.search.issuesAndPullRequests({
                q: query,
                sort: 'updated',
                order: 'asc',
                per_page: 100,
              });

              if (totalLocked === 0) {
                console.log(`Total candidates: ${data.total_count}`);
              }

              const fresh = data.items.filter((i) => !processed.has(i.number));
              if (fresh.length === 0) break;

              for (const issue of fresh) {
                if (totalLocked >= MAX_PER_RUN) break;
                processed.add(issue.number);
                try {
                  await github.rest.issues.createComment({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: issue.number,
                    body: lockComment,
                  });
                  await github.rest.issues.lock({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: issue.number,
                    lock_reason: 'resolved',
                  });
                  totalLocked++;
                  console.log(`Locked issue #${issue.number}: ${issue.title}`);
                  await sleep(1000);
                } catch (error) {
                  console.error(`Failed to lock issue #${issue.number}: ${error.message}`);
                }
              }
            }

            console.log(`Total issues locked: ${totalLocked}`);