name: Stale PR Management
on:
  schedule:
    # Runs daily at midnight UTC
    - cron: "0 0 * * *"
  pull_request:
    types:
      - labeled
jobs:
  stale-prs:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write
      issues: write
    steps:
      - name: Handle stale label
        uses: actions/github-script@v7
        with:
          script: |
            console.log('github object:', typeof github);
            console.log('github.rest:', typeof github?.rest);
            console.log('context.eventName:', context.eventName);
            
            const now = new Date();
            const owner = context.repo.owner;
            const repo = context.repo.repo;
            
            // --- PR labeled event ---
            if (context.eventName === "pull_request" && context.payload.action === "labeled") {
              const label = context.payload.label?.name;
              if (label === "stale") {
                await github.rest.issues.createComment({
                  owner,
                  repo,
                  issue_number: context.payload.pull_request.number,
                  body: "This PR has been marked as stale. It will be closed if no new commits are added in 7 days."
                });
              }
              return; // exit, nothing else to do
            }
            
            // --- Scheduled run ---
            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."
                });
              }
            }