name: OpenSpec Auto-Approval

on:
  pull_request:
    paths:
      - 'openspec/changes/**'
      - 'openspec/specs/**'
      - '.github/workflows/openspec-auto-approve.yml'
    types: [opened, synchronize, reopened]

permissions:
  pull-requests: write
  contents: read

jobs:
  auto-approve-openspec:
    runs-on: ubuntu-latest
    # Only approve PRs from Claude (AI agents)
    if: github.actor == 'fullsizemalt' || contains(github.head_ref, 'claude/')

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Check if PR is OpenSpec-related
        id: check_openspec
        run: |
          # Check if changes are only in openspec directory
          CHANGED_FILES=$(git diff --name-only origin/main...HEAD)
          OPENSPEC_FILES=$(echo "$CHANGED_FILES" | grep -E '^openspec/' | wc -l)
          TOTAL_FILES=$(echo "$CHANGED_FILES" | wc -l)

          if [ "$OPENSPEC_FILES" -eq "$TOTAL_FILES" ] && [ "$OPENSPEC_FILES" -gt 0 ]; then
            echo "is_openspec=true" >> $GITHUB_OUTPUT
          else
            echo "is_openspec=false" >> $GITHUB_OUTPUT
          fi

      - name: Auto-approve OpenSpec PR
        if: steps.check_openspec.outputs.is_openspec == 'true'
        uses: hmarr/auto-approve-action@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Add OpenSpec label
        if: steps.check_openspec.outputs.is_openspec == 'true'
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: ['openspec', 'auto-approved']
            })

      - name: Comment on PR
        if: steps.check_openspec.outputs.is_openspec == 'true'
        uses: actions/github-script@v7
        with:
          script: |
            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '✅ **Auto-approved** via OpenSpec workflow.\n\nThis PR modifies only OpenSpec proposals and specs. Ready for merge. 🚀'
            })