"""
Session-scoped fixtures that spin up and tear down the test stack.

The test stack uses docker-compose.test.yml which:
- Runs on port 18000 (won't collide with the dev stack on 8000)
- Uses tmpfs for all storage (no data survives after `down`)
- Uses project name "langlearn-test" to stay isolated from dev containers
"""

import pathlib
import subprocess

import httpx
import pytest

PROJECT_ROOT = pathlib.Path(__file__).parent.parent
COMPOSE_FILE = str(PROJECT_ROOT / "docker-compose.test.yml")
COMPOSE_PROJECT = "langlearn-test"
API_BASE_URL = "http://localhost:18000"


def _compose(*args: str) -> None:
    subprocess.run(
        ["docker", "compose", "-p", COMPOSE_PROJECT, "-f", COMPOSE_FILE, *args],
        cwd=PROJECT_ROOT,
        check=True,
    )


@pytest.fixture(scope="session", autouse=True)
def docker_stack():
    """Bring the test stack up before the session; tear it down (including volumes) after."""
    _compose("up", "--build", "--wait", "-d")
    yield
    _compose("down", "-v")


@pytest.fixture
def client() -> httpx.Client:
    """A plain httpx client pointed at the test API. Not authenticated."""
    with httpx.Client(base_url=API_BASE_URL) as c:
        yield c