name: LLM Code Review

on:
  pull_request:
    branches:
      - whichever-branch-you-want-code-review-for
    types:
      - opened
      - synchronize

jobs:
  code-review:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20

      - name: Get Diff
        id: get_diff
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "changeset<<EOF" >> $GITHUB_OUTPUT
          echo "$(gh pr diff ${{ github.event.pull_request.number }} --repo "${{ github.repository }}")" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Run AI code review
        uses: daves-dead-simple/open-ai-action@main
        id: code-review
        env:
          OPEN_API_KEY: ${{ secrets.OPENAI_API_KEY }}
        with:
          prompt: |
            Please code review the following changeset:
            ${{ steps.get_diff.outputs.changeset }}

      - name: Comment on PR with AI review
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh pr comment ${{ github.event.pull_request.number }} \
          --repo "${{ github.repository }}" \
          --body "${{ steps.code-review.outputs.completion }}"