name: Test Backend

on:
  push:
    branches:
      - main
  pull_request:
    types:
      - opened
      - synchronize

env:
  # The compose files live in docker/, so a bare `docker compose` from the repo
  # root finds nothing. With COMPOSE_FILE set, compose reads .env from the
  # working directory — the same file the backend settings load as ../.env.
  # compose.ci.yml drops the fixed container_names and the fixed 5432 — both
  # daemon-global, so without it a second run on the same host cannot start.
  COMPOSE_FILE: docker/compose.yml:docker/compose.dev.yml:docker/compose.ci.yml

jobs:
  test-backend:
    runs-on: ubuntu-latest
    env:
      # Per run, so the `down -v` steps reach neither a dev stack nor a run
      # still going. Unique names cannot be recycled, hence the always-on
      # teardown below.
      COMPOSE_PROJECT_NAME: fluksio-app-ci-backend-${{ github.run_id }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"
      - name: Set up uv
        uses: astral-sh/setup-uv@v7
        with:
          cache-dependency-glob: |
            pyproject.toml
            backend/pyproject.toml
            uv.lock
      - name: Write .env
        # Not committed, and both compose and the backend settings need it.
        # The suite runs on the runner and reaches the container over
        # POSTGRES_SERVER=localhost from there, on the port resolved below.
        run: cp .env.example .env
      - run: docker compose down -v --remove-orphans
      # Postgres is the only service the suite needs: the mail paths are
      # patched in tests/, and the flow engine falls back to in-memory state
      # while REDIS_HOST is empty.
      - run: docker compose up -d --wait db
      - name: Resolve the db port
        # Docker assigns it (docker/compose.ci.yml), so concurrent runs get one
        # each. An env var outranks the .env file in the backend settings.
        run: |
          echo "POSTGRES_PORT=$(docker compose port db 5432 | tail -n1 | cut -d: -f2)" >> "$GITHUB_ENV"
      - run: uv sync
      - name: Migrate DB and seed the superuser
        run: uv run bash scripts/prestart.sh
        working-directory: backend
      # scripts/tests-start.sh waits for the DB, then runs pytest under
      # coverage and prints the report (see backend/scripts/test.sh).
      - name: Run tests with coverage
        run: uv run bash scripts/tests-start.sh "Coverage for ${{ github.sha }}"
        working-directory: backend
      - name: Tear down
        if: always()
        run: docker compose down -v --remove-orphans