name: CI (Lint & Test)

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  backend-lint-test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up Python 3.11
        uses: actions/setup-python@v5
        with:
          python-version: '3.11'

      - name: Cache pip packages
        uses: actions/cache@v4
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
          restore-keys: ${{ runner.os }}-pip-

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          # Install CPU-only torch to avoid heavy CUDA downloads in CI
          pip install torch --index-url https://download.pytorch.org/whl/cpu
          pip install -r requirements.txt
          pip install black isort

      - name: Lint — black (format check)
        run: black --check --config pyproject.toml backend/app

      - name: Lint — isort (import order)
        run: isort --check-only --settings-path pyproject.toml backend/app

      - name: Run tests
        run: pytest backend/tests -v --tb=short
        env:
          APP_STAGE: testing
          LOG_LEVEL: ERROR
          ADMIN_SECRET: ci_test_secret_32chars_xxxxxxxxxxxxxxxx
          CLEANUP_SECRET: ci_test_secret_32chars_xxxxxxxxxxxxxxxx