name: Check uv Dependencies Changes

on:
  pull_request:
    paths:
      - 'uv.lock'
      - 'pyproject.toml'

jobs:
  check-uv-changes:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: write

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check for uv.lock changes
        id: check-uv-lock
        run: |
          if git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }} | grep -q "uv.lock"; then
            echo "uv_lock_changed=true" >> $GITHUB_OUTPUT
          else
            echo "uv_lock_changed=false" >> $GITHUB_OUTPUT
          fi

      - name: Check for pyproject.toml changes
        id: check-pyproject
        run: |
          if git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }} | grep -q "pyproject.toml"; then
            echo "pyproject_changed=true" >> $GITHUB_OUTPUT
          else
            echo "pyproject_changed=false" >> $GITHUB_OUTPUT
          fi

      - name: Create PR comment
        if: steps.check-uv-lock.outputs.uv_lock_changed == 'true' || steps.check-pyproject.outputs.pyproject_changed == 'true'
        uses: actions/github-script@v7
        with:
          script: |
            const uvLockChanged = ${{ steps.check-uv-lock.outputs.uv_lock_changed }};
            const pyprojectChanged = ${{ steps.check-pyproject.outputs.pyproject_changed }};

            let message = '📦 Dependencies Alert:\n\n';

            if (uvLockChanged && pyprojectChanged) {
              message += '- Both `uv.lock` and `pyproject.toml` have been modified\n';
            } else if (uvLockChanged) {
              message += '- `uv.lock` has been modified\n';
            } else if (pyprojectChanged) {
              message += '- `pyproject.toml` has been modified\n';
            }

            message += '\nPlease review these changes carefully to ensure they are intended (cc @sarahwooders @cpacker).';

            github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: message
            });