from pathlib import Path

import yaml


PROJECT_ROOT = Path(__file__).resolve().parents[2]
COMPOSE_FILE = PROJECT_ROOT / "docker-compose.yml"
INFRA_README = PROJECT_ROOT / "infra" / "README.md"


def _load_compose() -> dict:
    content = yaml.safe_load(COMPOSE_FILE.read_text(encoding="utf-8"))
    assert isinstance(content, dict)
    return content


def test_compose_defines_required_services() -> None:
    compose = _load_compose()
    services = compose.get("services")
    assert isinstance(services, dict)
    assert {"app", "redis", "postgres"}.issubset(services.keys())
    assert "postgres" in services["app"]["depends_on"]


def test_smoke_command_sequence_is_documented() -> None:
    readme = INFRA_README.read_text(encoding="utf-8")

    assert "docker compose config" in readme
    assert "docker compose up -d redis" in readme
    assert "docker compose ps" in readme