# Backfills duplicate detection for historical issues.
# Triggered manually via workflow_dispatch.
name: Backfill Duplicate Detection

on:
  workflow_dispatch:
    inputs:
      days_back:
        description: 'How many days back to look for issues (default: 30)'
        required: false
        default: '30'
        type: number
      dry_run:
        description: 'Dry run – analyze but do not post comments or apply labels'
        required: false
        default: 'false'
        type: choice
        options:
          - 'false'
          - 'true'

permissions:
  issues: write
  contents: read

jobs:
  backfill:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Ensure required labels exist
        uses: actions/github-script@v7
        with:
          script: |
            const labels = [
              { name: 'duplicate', color: 'cfd3d7', description: 'This issue or pull request already exists' },
              { name: 'autoclose', color: 'e4e669', description: 'Will be auto-closed after a period of inactivity' },
            ];
            for (const label of labels) {
              try {
                await github.rest.issues.getLabel({
                  owner: context.repo.owner,
                  repo:  context.repo.repo,
                  name:  label.name,
                });
              } catch (err) {
                if (err.status === 404) {
                  await github.rest.issues.createLabel({
                    owner: context.repo.owner, repo: context.repo.repo,
                    name: label.name, color: label.color, description: label.description,
                  });
                  core.info(`Created label: ${label.name}`);
                }
              }
            }

      - name: Run backfill script
        env:
          GITHUB_TOKEN:      ${{ secrets.GITHUB_TOKEN }}
          ANTHROPIC_API_KEY: ${{ secrets.AUTHROPIC_API_KEY }}
          REPO_OWNER:        ${{ github.repository_owner }}
          REPO_NAME:         ${{ github.event.repository.name }}
          DAYS_BACK:         ${{ inputs.days_back }}
          DRY_RUN:           ${{ inputs.dry_run }}
        run: node scripts/backfill-dedupe.js