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", "signoz"}.issubset(services.keys())


def test_app_service_contains_cache_and_observability_wiring() -> None:
    compose = _load_compose()
    app_service = compose["services"]["app"]

    build_config = app_service.get("build")
    assert isinstance(build_config, dict)
    assert build_config["context"] == "."
    assert build_config["dockerfile"] == "Dockerfile"

    environment = app_service.get("environment")
    assert isinstance(environment, dict)
    assert environment["G2S_REPOSITORY__REDIS_DSN"] == "redis://redis:6379/0"
    assert environment["G2S_OBSERVABILITY__OTLP_ENDPOINT"] == "http://signoz:4317"
    assert environment["G2S_CONFIG_FILE"] == "/app/config.yaml"

    depends_on = app_service.get("depends_on")
    assert isinstance(depends_on, list)
    assert "redis" in depends_on
    assert "signoz" in 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 signoz" in readme
    assert "docker compose ps" in readme