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import pytest
from httpx import AsyncClient
from sqlalchemy.ext.asyncio import AsyncSession

pytestmark = pytest.mark.asyncio

@pytest.fixture
async def user_token(client: AsyncClient) -> str:
    """Create a test user and return their token"""
    # Register user
    await client.post(
        "/api/v1/auth/register",
        data={
            "username": "testuser@example.com",
            "password": "testpass123",
            "full_name": "Test User"
        }
    )
    
    # Login to get token
    response = await client.post(
        "/api/v1/auth/login",
        data={
            "username": "testuser@example.com",
            "password": "testpass123"
        }
    )
    return response.json()["access_token"]

@pytest.fixture
async def test_product(client: AsyncClient, user_token: str) -> dict:
    """Create a test product and return its data"""
    response = await client.post(
        "/api/v1/products/",
        json={
            "name": "Test Product",
            "description": "A test product",
            "price": 99.99,
            "category": "test",
            "inventory_count": 10
        },
        headers={"Authorization": f"Bearer {user_token}"}
    )
    return response.json()

async def test_create_order(client: AsyncClient, user_token: str, test_product: dict):
    # Test creating an order
    response = await client.post(
        "/api/v1/orders/",
        json={
            "items": [
                {
                    "product_id": test_product["id"],
                    "quantity": 2
                }
            ]
        },
        headers={"Authorization": f"Bearer {user_token}"}
    )
    assert response.status_code == 200
    data = response.json()
    assert len(data["items"]) == 1
    assert data["items"][0]["product_id"] == test_product["id"]
    assert data["total_amount"] == test_product["price"] * 2
    return data["id"]

async def test_get_order(client: AsyncClient, user_token: str, test_product: dict):
    # First create an order
    order_id = await test_create_order(client, user_token, test_product)
    
    # Test getting the order
    response = await client.get(
        f"/api/v1/orders/{order_id}",
        headers={"Authorization": f"Bearer {user_token}"}
    )
    assert response.status_code == 200
    data = response.json()
    assert data["id"] == order_id
    assert len(data["items"]) == 1

async def test_list_orders(client: AsyncClient, user_token: str, test_product: dict):
    # Create multiple orders
    await test_create_order(client, user_token, test_product)
    await test_create_order(client, user_token, test_product)
    
    # Test listing orders
    response = await client.get(
        "/api/v1/orders/",
        headers={"Authorization": f"Bearer {user_token}"}
    )
    assert response.status_code == 200
    data = response.json()
    assert len(data) >= 2

async def test_update_order_status(client: AsyncClient, user_token: str, test_product: dict):
    # First create an order
    order_id = await test_create_order(client, user_token, test_product)
    
    # Test updating the order status
    response = await client.put(
        f"/api/v1/orders/{order_id}/status",
        json={"status": "processing"},
        headers={"Authorization": f"Bearer {user_token}"}
    )
    assert response.status_code == 200
    data = response.json()
    assert data["status"] == "processing"

    # Test invalid status
    response = await client.put(
        f"/api/v1/orders/{order_id}/status",
        json={"status": "invalid_status"},
        headers={"Authorization": f"Bearer {user_token}"}
    )
    assert response.status_code == 400

async def test_cancel_order(client: AsyncClient, user_token: str, test_product: dict):
    # First create an order
    order_id = await test_create_order(client, user_token, test_product)
    
    # Get initial product inventory
    product_response = await client.get(
        f"/api/v1/products/{test_product['id']}",
        headers={"Authorization": f"Bearer {user_token}"}
    )
    initial_inventory = product_response.json()["inventory_count"]
    
    # Cancel the order
    response = await client.put(
        f"/api/v1/orders/{order_id}/status",
        json={"status": "cancelled"},
        headers={"Authorization": f"Bearer {user_token}"}
    )
    assert response.status_code == 200
    assert response.json()["status"] == "cancelled"
    
    # Verify inventory was restored
    product_response = await client.get(
        f"/api/v1/products/{test_product['id']}",
        headers={"Authorization": f"Bearer {user_token}"}
    )
    final_inventory = product_response.json()["inventory_count"]
    assert final_inventory == initial_inventory + 2  # We ordered 2 items