namespace Before;

/// <summary>
/// Consumes <see cref="Client"/> and <see cref="Order"/> domain objects
/// directly.
/// </summary>
public class WebApp
{
    /// <summary>
    /// Returns the client's name, id, and orders formatted as text.
    /// </summary>
    public string ShowClient(Client client)
    {
        ArgumentNullException.ThrowIfNull(client);

        var lines = new List<string> { $"{client.Name} [{client.Id}]" };
        foreach (var order in client.Orders)
            lines.Add($"  - order [{order.Id}]: {order.Description}");
        return string.Join(Environment.NewLine, lines);
    }

    /// <summary>Returns true when the client is attached to a context.</summary>
    public bool IsPersisted(Client client)
    {
        ArgumentNullException.ThrowIfNull(client);
        return client.DbContext is not null;
    }
}