name: Mirror Upstream PRs
on:
  schedule:
    - cron: "0 8 * * *"
  workflow_dispatch:

permissions:
  issues: write

jobs:
  mirror:
    runs-on: ubuntu-latest
    steps:
      - name: Mirror new upstream PRs
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const upstream = { owner: 'stevearc', repo: 'oil.nvim' };
            const fork = { owner: 'barrettruth', repo: 'oil.nvim' };

            const since = new Date();
            since.setDate(since.getDate() - 1);
            const sinceISO = since.toISOString();

            const { data: prs } = await github.rest.pulls.list({
              ...upstream,
              state: 'open',
              sort: 'created',
              direction: 'desc',
              per_page: 30,
            });

            const recentPRs = prs.filter(pr => {
              if (new Date(pr.created_at) < since) return false;
              if (pr.user.login === 'dependabot[bot]') return false;
              if (pr.user.login === 'dependabot-preview[bot]') return false;
              return true;
            });

            if (recentPRs.length === 0) {
              console.log('No new upstream PRs in the last 24 hours.');
              return;
            }

            const { data: existingIssues } = await github.rest.issues.listForRepo({
              ...fork,
              state: 'all',
              labels: 'upstream/pr',
              per_page: 100,
            });

            const mirroredNumbers = new Set();
            for (const issue of existingIssues) {
              const match = issue.title.match(/^upstream#(\d+)/);
              if (match) mirroredNumbers.add(parseInt(match[1]));
            }

            for (const pr of recentPRs) {
              if (mirroredNumbers.has(pr.number)) {
                console.log(`Skipping PR #${pr.number} — already mirrored.`);
                continue;
              }

              const labels = pr.labels.map(l => l.name).join(', ') || 'none';

              await github.rest.issues.create({
                ...fork,
                title: `upstream#${pr.number}: ${pr.title}`,
                body: [
                  `Mirrored from [stevearc/oil.nvim#${pr.number}](${pr.html_url}).`,
                  '',
                  `**Author:** @${pr.user.login}`,
                  `**Labels:** ${labels}`,
                  `**Created:** ${pr.created_at}`,
                  '',
                  '---',
                  '',
                  pr.body || '*No description provided.*',
                ].join('\n'),
                labels: ['upstream/pr'],
              });

              console.log(`Created issue for upstream PR #${pr.number}: ${pr.title}`);
            }