"""配置加载约定测试。"""

from pathlib import Path

from app.core.config import BACKEND_ENV_FILE, Settings


def test_default_env_file_is_backend_env():
    """默认 env 文件应固定为 backend/.env 的绝对路径。"""

    configured_env_file = Path(Settings.model_config["env_file"])

    assert configured_env_file == BACKEND_ENV_FILE
    assert configured_env_file.is_absolute()
    assert configured_env_file.parent.name == "backend"
    assert configured_env_file.name == ".env"


def test_explicit_env_file_ignores_current_working_directory_dotenv(monkeypatch, tmp_path):
    """显式 env 文件不应被当前目录 .env 污染。"""

    root_env = tmp_path / ".env"
    root_env.write_text(
        "\n".join(
            [
                "SECRET_KEY=root-env-should-not-be-used",
                "DATABASE_URL=sqlite+aiosqlite:///root-env.db",
                "DEBUG=false",
            ]
        ),
        encoding="utf-8",
    )
    backend_env = tmp_path / "backend.env"
    backend_env.write_text(
        "\n".join(
            [
                "SECRET_KEY=backend-env-secret",
                "DATABASE_URL=sqlite+aiosqlite:///backend-env.db",
                "DEBUG=true",
            ]
        ),
        encoding="utf-8",
    )

    monkeypatch.chdir(tmp_path)
    monkeypatch.delenv("SECRET_KEY", raising=False)
    monkeypatch.delenv("DATABASE_URL", raising=False)

    settings = Settings(_env_file=backend_env)

    assert settings.database_url == "sqlite+aiosqlite:///backend-env.db"
    assert settings.secret_key == "backend-env-secret"
    assert settings.debug is True