using System;

namespace LinFu.IoC
{
    /// <summary>
    ///     The exception thrown when a service name and a service type is
    ///     requested from a named container and that named container
    ///     is unable to find or create that particular service instance.
    /// </summary>
    [Serializable]
    public class NamedServiceNotFoundException : ServiceNotFoundException
    {
        private readonly string _serviceName;
        private readonly Type _serviceType;

        /// <summary>
        ///     Initializes the service exception using the
        ///     given <paramref name="serviceType" /> as
        ///     the service that was not found.
        /// </summary>
        /// <param name="serviceType">The service type being requested.</param>
        /// <param name="serviceName">The name of the service being requested.</param>
        public NamedServiceNotFoundException(string serviceName, Type serviceType) : base(serviceType)
        {
            _serviceName = serviceName;
            _serviceType = serviceType;
        }

        /// <summary>
        ///     The error message that this particular exception
        ///     will display.
        /// </summary>
        public override string Message => string.Format("Unable to find a service named '{0}' with type '{1}'",
            _serviceName,
            _serviceType.AssemblyQualifiedName);
    }
}