//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2015 Jb Evain
// Copyright (c) 2008 - 2011 Novell, Inc.
//
// Licensed under the MIT/X11 license.
//

using MonoFN.Collections.Generic;
using System;
using System.Text;

namespace MonoFN.Cecil
{
    public sealed class CallSite : IMethodSignature
    {
        private readonly MethodReference signature;
        public bool HasThis
        {
            get { return signature.HasThis; }
            set { signature.HasThis = value; }
        }
        public bool ExplicitThis
        {
            get { return signature.ExplicitThis; }
            set { signature.ExplicitThis = value; }
        }
        public MethodCallingConvention CallingConvention
        {
            get { return signature.CallingConvention; }
            set { signature.CallingConvention = value; }
        }
        public bool HasParameters
        {
            get { return signature.HasParameters; }
        }
        public Collection<ParameterDefinition> Parameters
        {
            get { return signature.Parameters; }
        }
        public TypeReference ReturnType
        {
            get { return signature.MethodReturnType.ReturnType; }
            set { signature.MethodReturnType.ReturnType = value; }
        }
        public MethodReturnType MethodReturnType
        {
            get { return signature.MethodReturnType; }
        }
        public string Name
        {
            get { return string.Empty; }
            set { throw new InvalidOperationException(); }
        }
        public string Namespace
        {
            get { return string.Empty; }
            set { throw new InvalidOperationException(); }
        }
        public ModuleDefinition Module
        {
            get { return ReturnType.Module; }
        }
        public IMetadataScope Scope
        {
            get { return signature.ReturnType.Scope; }
        }
        public MetadataToken MetadataToken
        {
            get { return signature.token; }
            set { signature.token = value; }
        }
        public string FullName
        {
            get
            {
                StringBuilder signature = new();
                signature.Append(ReturnType.FullName);
                this.MethodSignatureFullName(signature);
                return signature.ToString();
            }
        }

        internal CallSite()
        {
            signature = new();
            signature.token = new(TokenType.Signature, 0);
        }

        public CallSite(TypeReference returnType) : this()
        {
            if (returnType == null)
                throw new ArgumentNullException("returnType");

            signature.ReturnType = returnType;
        }

        public override string ToString()
        {
            return FullName;
        }
    }
}