import pytest
from fastapi.testclient import TestClient
from sqlalchemy.orm import Session

from services import settings as settings_service


@pytest.mark.usefixtures("db_session")
def test_read_css_settings_reflects_env_overrides(
    api_client: TestClient, monkeypatch: pytest.MonkeyPatch
) -> None:
    env_var = settings_service.css_key_to_env_var("--color-background")
    monkeypatch.setenv(env_var, "#123456")

    response = api_client.get("/api/settings/css")
    assert response.status_code == 200
    body = response.json()

    assert body["variables"]["--color-background"] == "#123456"
    assert body["env_overrides"]["--color-background"] == "#123456"
    assert any(
        source["env_var"] == env_var and source["value"] == "#123456"
        for source in body["env_sources"]
    )


@pytest.mark.usefixtures("db_session")
def test_update_css_settings_persists_changes(
    api_client: TestClient, db_session: Session
) -> None:
    payload = {"variables": {"--color-primary": "#112233"}}

    response = api_client.put("/api/settings/css", json=payload)
    assert response.status_code == 200
    body = response.json()

    assert body["variables"]["--color-primary"] == "#112233"

    persisted = settings_service.get_css_color_settings(db_session)
    assert persisted["--color-primary"] == "#112233"


@pytest.mark.usefixtures("db_session")
def test_update_css_settings_invalid_value_returns_422(
    api_client: TestClient
) -> None:
    response = api_client.put(
        "/api/settings/css",
        json={"variables": {"--color-primary": "not-a-color"}},
    )
    assert response.status_code == 422
    body = response.json()
    assert "color" in body["detail"].lower()