name: Auto-merge Dependabot PRs

on:
  pull_request:
    branches:
      - main
      - master

permissions:
  contents: write
  pull-requests: write

jobs:
  dependabot:
    name: Auto-merge Dependabot PRs
    runs-on: ubuntu-latest
    if: github.actor == 'dependabot[bot]'

    steps:
      - name: Dependabot metadata
        id: metadata
        uses: dependabot/fetch-metadata@v2
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"

      - name: Auto-approve patch and minor updates
        if: |
          steps.metadata.outputs.update-type == 'version-update:semver-patch' ||
          steps.metadata.outputs.update-type == 'version-update:semver-minor'
        run: |
          gh pr review --approve "$PR_URL"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}
          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

      - name: Enable auto-merge for patch updates
        if: steps.metadata.outputs.update-type == 'version-update:semver-patch'
        run: |
          gh pr merge --auto --squash "$PR_URL"
        env:
          PR_URL: ${{github.event.pull_request.html_url}}
          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}