name: Remove Labels and Assignees on Issue Close

on:
  issues:
    types: [closed]
  pull_request:
    types: [closed]
  pull_request_target:
    types: [closed]

jobs:
  remove-labels-and-assignees:
    runs-on: ubuntu-latest
    steps:
      - name: Remove labels and assignees
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { owner, repo } = context.repo;

            async function processIssue(issueNumber, isFromPR = false, prBaseBranch = null) {
              try {
                if (isFromPR && prBaseBranch !== 'v4.x') {
                  return;
                }

                const { data: currentLabels } = await github.rest.issues.listLabelsOnIssue({
                  owner,
                  repo,
                  issue_number: issueNumber
                });

                const labelsToKeep = currentLabels
                  .filter(label => label.name === '⏱︎ Stale')
                  .map(label => label.name);

                await github.rest.issues.setLabels({
                  owner,
                  repo,
                  issue_number: issueNumber,
                  labels: labelsToKeep
                });

                const { data: issue } = await github.rest.issues.get({
                  owner,
                  repo,
                  issue_number: issueNumber
                });

                if (issue.assignees && issue.assignees.length > 0) {
                  await github.rest.issues.removeAssignees({
                    owner,
                    repo,
                    issue_number: issueNumber,
                    assignees: issue.assignees.map(assignee => assignee.login)
                  });
                }
              } catch (error) {
                if (error.status !== 404) {
                  console.error(`Error processing issue ${issueNumber}:`, error);
                }
              }
            }

            if (context.eventName === 'issues') {
              await processIssue(context.payload.issue.number);
            }

            if (context.eventName === 'pull_request' || context.eventName === 'pull_request_target') {
              const pr = context.payload.pull_request;
              await processIssue(pr.number);
              if (pr.merged && pr.base.ref === 'v4.x' && pr.body) {
                const issueReferences = pr.body.match(/#(\d+)/g);
                if (issueReferences) {
                  for (const reference of issueReferences) {
                    const issueNumber = parseInt(reference.substring(1));
                    await processIssue(issueNumber, true, pr.base.ref);
                  }
                }
              }
            }