name: Auto-close duplicate issues (DRY RUN)
description: Dry run - logs issues that would be auto-closed as duplicates after 3 days if no response
on:
  schedule:
    - cron: '0 9 * * *'

jobs:
  auto-close-duplicates:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    permissions:
      contents: read
      issues: write

    steps:
      - name: Auto-close duplicate issues
        uses: actions/github-script@v7
        with:
          script: |
            const threeDaysAgo = new Date();
            threeDaysAgo.setDate(threeDaysAgo.getDate() - 3);
            
            // Get all open issues
            const { data: issues } = await github.rest.issues.listForRepo({
              owner: context.repo.owner,
              repo: context.repo.repo,
              state: 'open',
              per_page: 100
            });
            
            for (const issue of issues) {
              // Get comments for this issue
              const { data: comments } = await github.rest.issues.listComments({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: issue.number
              });
              
              // Find duplicate comments (look for "Found 1 possible duplicate" or "Found X possible duplicate")
              const dupeComments = comments.filter(comment => 
                comment.body.includes('Found') && 
                comment.body.includes('possible duplicate') &&
                comment.user.type === 'Bot'
              );
              
              if (dupeComments.length === 0) continue;
              
              // Get the most recent duplicate comment
              const lastDupeComment = dupeComments[dupeComments.length - 1];
              const dupeCommentDate = new Date(lastDupeComment.created_at);
              
              // Check if the duplicate comment is 3+ days old
              if (dupeCommentDate > threeDaysAgo) continue;
              
              // Check if there are any comments after the duplicate comment
              const commentsAfterDupe = comments.filter(comment => 
                new Date(comment.created_at) > dupeCommentDate
              );
              
              if (commentsAfterDupe.length > 0) continue;
              
              // Check if issue author reacted with thumbs down to the duplicate comment
              const { data: reactions } = await github.rest.reactions.listForIssueComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: lastDupeComment.id
              });
              
              const authorThumbsDown = reactions.some(reaction => 
                reaction.user.id === issue.user.id && reaction.content === '-1'
              );
              
              if (authorThumbsDown) continue;
              
              // DRY RUN: Log the issue that would be auto-closed
              const issueUrl = `https://github.com/${context.repo.owner}/${context.repo.repo}/issues/${issue.number}`;
              console.log(`[DRY RUN] Would auto-close issue #${issue.number} as duplicate: ${issueUrl}`);
            }