// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.Reflection;

namespace Microsoft.Extensions.DependencyInjection.ServiceLookup
{
    internal sealed class ConstructorCallSite : ServiceCallSite
    {
        internal ConstructorInfo ConstructorInfo { get; }
        internal ServiceCallSite[] ParameterCallSites { get; }

        public ConstructorCallSite(ResultCache cache, Type serviceType, ConstructorInfo constructorInfo, object? serviceKey) : this(cache, serviceType, constructorInfo, Array.Empty<ServiceCallSite>(), serviceKey)
        {
        }

        public ConstructorCallSite(ResultCache cache, Type serviceType, ConstructorInfo constructorInfo, ServiceCallSite[] parameterCallSites, object? serviceKey) : base(cache, serviceKey)
        {
            if (!serviceType.IsAssignableFrom(constructorInfo.DeclaringType))
            {
                throw new ArgumentException(SR.Format(SR.ImplementationTypeCantBeConvertedToServiceType, constructorInfo.DeclaringType, serviceType));
            }

            ServiceType = serviceType;
            ConstructorInfo = constructorInfo;
            ParameterCallSites = parameterCallSites;
        }

        public override Type ServiceType { get; }

        public override Type? ImplementationType => ConstructorInfo.DeclaringType;
        public override CallSiteKind Kind { get; } = CallSiteKind.Constructor;
    }
}