name: Stale PR Management
on:
  schedule:
    - cron: "0 0 * * *"  # Daily at midnight UTC
  workflow_dispatch:      # Allow manual trigger for testing

jobs:
  stale-prs:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
      issues: write
      contents: read
    steps:
      - name: Handle stale PRs
        uses: actions/github-script@v7
        with:
          script: |
            const now = new Date();
            const owner = context.repo.owner;
            const repo = context.repo.repo;
            
            const { data: prs } = await github.rest.pulls.list({
              owner,
              repo,
              state: "open",
              per_page: 100
            });
            
            for (const pr of prs) {
              const hasStale = pr.labels.some(l => l.name === "stale");
              if (!hasStale) continue;
              
              const { data: commits } = await github.rest.pulls.listCommits({
                owner,
                repo,
                pull_number: pr.number
              });
              
              const lastCommitDate = new Date(commits[commits.length - 1].commit.author.date);
              const diffDays = (now - lastCommitDate) / (1000 * 60 * 60 * 24);
              
              if (diffDays > 7) {
                await github.rest.pulls.update({
                  owner,
                  repo,
                  pull_number: pr.number,
                  state: "closed"
                });
                await github.rest.issues.createComment({
                  owner,
                  repo,
                  issue_number: pr.number,
                  body: "Closing stale PR due to inactivity."
                });
              } else if (diffDays <= 7) {
                await github.rest.issues.removeLabel({
                  owner,
                  repo,
                  issue_number: pr.number,
                  name: "stale"
                });
                await github.rest.issues.createComment({
                  owner,
                  repo,
                  issue_number: pr.number,
                  body: "Recent activity detected. Removing stale label."
                });
              }
            }