Run a raw GraphQL query against the sales API.

Args:
    query: The GraphQL query string
    variables: Optional variables for the query

Returns:
    Dict containing the GraphQL response or error information

Test the connection to the GraphQL endpoint.

Returns:
    Dict containing connection status

Retrieve all orders with complete details.

Returns:
    Dict containing all orders or error information

Retrieve a specific order by its ID.

Args:
    order_id: The order ID to search for

Returns:
    Dict containing the order details or error information

Retrieve all orders for a specific customer by name.

Args:
    customer_name: The customer name to search for

Returns:
    Dict containing the customer's orders or error information

Retrieve all orders for a specific customer by ID.

Args:
    customer_id: The customer ID to search for

Returns:
    Dict containing the customer's orders or error information

Get the total amount spent by a customer.

Args:
    customer_name: The customer name to calculate total spending for

Returns:
    Dict containing the total spent or error information

Retrieve all orders after a given date (YYYY-MM-DD).
Note: This filters locally since the GraphQL schema doesn't have date filters.

Args:
    date: Date string in YYYY-MM-DD format

Returns:
    Dict containing filtered orders or error information

Retrieve all orders between two dates (inclusive).

Args:
    start_date: Start date in YYYY-MM-DD format
    end_date: End date in YYYY-MM-DD format

Returns:
    Dict containing filtered orders or error information

Get a summary of all orders including counts and totals.

Returns:
    Dict containing order summary statistics