name: Wrong Base Branch

on:
  pull_request_target:
    types:
      - opened

jobs:
  comment:
    name: Comment on PRs targeting non-default branch
    runs-on: ubuntu-latest
    if: >-
      github.event.pull_request.base.ref != github.event.repository.default_branch &&
      !contains(fromJSON('["OWNER", "MEMBER"]'), github.event.pull_request.author_association)
    permissions:
      pull-requests: write
    steps:
      - name: Add comment
        run: |
          gh pr comment ${{ github.event.pull_request.number }} --body ":wave: @${{ github.event.pull_request.user.login }}, thanks for your contribution!

          This PR targets \`${{ github.event.pull_request.base.ref }}\`, but all features and bug fixes must target the default branch (\`${{ github.event.repository.default_branch }}\`).

          Please:
          1. Rebase your changes onto \`${{ github.event.repository.default_branch }}\` (for example: \`git rebase --onto origin/${{ github.event.repository.default_branch }} ${{ github.event.pull_request.base.ref }}\`).
          2. Update this PR to target \`${{ github.event.repository.default_branch }}\` using the *Edit* button next to the PR title.

          **Please do not close this PR and open a new one** — you can change the base branch on the existing PR directly."
        env:
          GH_TOKEN: ${{ github.token }}
          GH_REPO: ${{ github.repository }}