name: AI Engine CI

on:
  push:
    branches: [main]
  pull_request:

jobs:
  engine:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      pull-requests: write
    defaults:
      run:
        working-directory: engine

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

      - name: Install uv
        uses: astral-sh/setup-uv@v4
        with:
          enable-cache: true

      - name: Install dependencies
        run: make install

      - name: Run fixers
        # Ignore errors here because we're going to add comments for them in the following steps before actually failing
        run: make fix || true

      - name: Check for fixer changes
        id: fixer_changes
        run: |
          if git diff --quiet; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
          else
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Post fixer suggestions
        if: steps.fixer_changes.outputs.changed == 'true' && github.event_name == 'pull_request'
        uses: reviewdog/action-suggester@v1
        continue-on-error: true
        with:
          tool_name: engine-make-fix
          github_token: ${{ secrets.GITHUB_TOKEN }}
          filter_mode: file
          fail_level: any
          level: info

      - name: Comment on fixer suggestions
        if: steps.fixer_changes.outputs.changed == 'true' && github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: "The Python code in your PR has formatting/linting issues. Consider running `make fix` locally or setting up your editor's Ruff integration to auto-format and lint your files as you go, or commit the suggested changes on this PR.",
            });

      - name: Verify fixer changes are committed
        if: steps.fixer_changes.outputs.changed == 'true'
        run: |
          if ! git diff --exit-code; then
            echo "Fixes are out of date."
            echo "Apply the reviewdog suggestions or run 'make fix' from engine/ and commit the updated files."
            git --no-pager diff --stat
            exit 1
          fi

      - name: Run linting
        run: make lint

      - name: Run type checking
        run: make typecheck

      - name: Run tests
        run: make test