"""Regression coverage for application dependency module imports."""

import importlib
import sys
from pathlib import Path

import pytest


def test_dependency_module_compiles():
    """Database initialization dependencies remain valid Python syntax."""
    module_path = Path(__file__).parents[1] / "app" / "core" / "deps.py"

    compile(module_path.read_text(encoding="utf-8"), str(module_path), "exec")


@pytest.mark.parametrize(
    ("database_url", "expected_url"),
    [
        ("sqlite:///./pingwatch.db", "sqlite+aiosqlite:///./pingwatch.db"),
        (
            "sqlite+aiosqlite:///./pingwatch.db",
            "sqlite+aiosqlite:///./pingwatch.db",
        ),
    ],
)
def test_dependency_module_normalizes_sqlite_url_once(
    monkeypatch, database_url, expected_url
):
    """Plain SQLite URLs gain the async driver without duplicating an existing one."""
    monkeypatch.setenv("DATABASE_URL", database_url)
    sys.modules.pop("app.core.deps", None)
    sys.modules.pop("app.config", None)

    deps = importlib.import_module("app.core.deps")

    assert str(deps.engine.url) == expected_url


def test_dependency_module_initializes_with_default_sqlite_url(monkeypatch):
    """The default database setting can initialize the asynchronous dependency."""
    monkeypatch.delenv("DATABASE_URL", raising=False)
    sys.modules.pop("app.core.deps", None)
    sys.modules.pop("app.config", None)

    deps = importlib.import_module("app.core.deps")

    assert str(deps.engine.url) == "sqlite+aiosqlite:///./pingwatch.db"