"""
Tests for models listing router.
"""
import pytest
from fastapi.testclient import TestClient


@pytest.mark.unit
def test_list_models(client: TestClient) -> None:
    """Test listing available models."""
    response = client.get("/v1/models")

    assert response.status_code == 200
    data = response.json()

    # Verify response structure
    assert data["object"] == "list"
    assert "data" in data
    assert isinstance(data["data"], list)

    # Should have both models from registry
    assert len(data["data"]) == 2

    # Check for expected model IDs
    model_ids = [m["id"] for m in data["data"]]
    assert "lorem-tester" in model_ids
    assert "Tatlock" in model_ids

    # Verify model structure
    for model in data["data"]:
        assert model["object"] == "model"
        assert "id" in model
        assert "created" in model
        assert "owned_by" in model
        assert model["owned_by"] == "tatlock"


@pytest.mark.unit
def test_models_endpoint_returns_json(client: TestClient) -> None:
    """Test that models endpoint returns valid JSON."""
    response = client.get("/v1/models")
    
    assert response.status_code == 200
    assert response.headers["content-type"] == "application/json"
    
    # Should be able to parse as JSON
    data = response.json()
    assert isinstance(data, dict)