import pytest
from django.test import Client
from core.models import AppUser, Library

@pytest.fixture
def client():
    return Client()

@pytest.fixture
def user(db):
    return AppUser.objects.create_user(username="apiuser", email="api@example.com", password="password")

@pytest.fixture
def library(db, user):
    return Library.objects.create(owner_user=user, name="Test Library", visibility="private")

@pytest.mark.django_db
def test_list_libraries(client, library):
    response = client.get("/api/library/")
    assert response.status_code == 200
    data = response.json()
    assert len(data) == 1
    assert data[0]["name"] == "Test Library"
    assert data[0]["owner_user_id"] == library.owner_user.id

@pytest.mark.django_db
def test_get_library(client, library):
    response = client.get(f"/api/library/{library.id}")
    assert response.status_code == 200
    data = response.json()
    assert data["name"] == "Test Library"

@pytest.mark.django_db
def test_get_library_not_found(client):
    response = client.get("/api/library/999")
    assert response.status_code == 404

@pytest.mark.django_db
def test_create_library(client, user):
    payload = {
        "name": "New API Library",
        "description": "Created via API",
        "visibility": "public",
        "owner_user_id": user.id
    }
    response = client.post("/api/library/", data=payload, content_type="application/json")
    assert response.status_code == 201
    data = response.json()
    assert data["name"] == "New API Library"
    assert data["visibility"] == "public"
    
    # Verify it hit the DB
    assert Library.objects.count() == 1
    assert Library.objects.get(id=data["id"]).name == "New API Library"