using System;
using CPU = Indy.IL2CPU.Assembler;
using CPUx86 = Indy.IL2CPU.Assembler.X86;
using System.Reflection;
using Indy.IL2CPU.Assembler;

namespace Cosmos.IL2CPU.X86.IL
{
	[Cosmos.IL2CPU.OpCode(ILOpCode.Code.Unbox)]
	public class Unbox: ILOp
	{
		public Unbox(Cosmos.IL2CPU.Assembler aAsmblr):base(aAsmblr)
		{
		}

    public override void Execute(uint aMethodUID, ILOpCode aOpCode) {
      throw new Exception("TODO: Unbox");
    }

		// 	[OpCode(OpCodeEnum.Unbox)]
		// 	public class Unbox: Op {
		// 		private string mTypeIdLabel;
		// 		private string mThisLabel;
		// 		private string mNextOpLabel;
		// 		private Type mType;
		// 		private uint mCurrentILOffset;
		// 		private bool mDebugMode;
		// 		public Unbox(ILReader aReader, MethodInformation aMethodInfo)
		// 			: base(aReader, aMethodInfo) {
		// 			mType = aReader.OperandValueType;
		// 			if (mType == null) {
		// 				throw new Exception("Unable to determine Type!");
		// 			}
		// 			mThisLabel = GetInstructionLabel(aReader);
		// 			mNextOpLabel = GetInstructionLabel(aReader.NextPosition);
		// 			mCurrentILOffset = aReader.Position;
		// 			mDebugMode = aMethodInfo.DebugMode;
		// 		}
		// 		public override void DoAssemble() {
		//             mTypeIdLabel = GetService<IMetaDataInfoService>().GetTypeIdLabel(mType);
		// 			
		//             var xTypeSize = GetService<IMetaDataInfoService>().GetFieldStorageSize(mType);
		// 			
		// 			string mReturnNullLabel = mThisLabel + "_ReturnNull";
		//             new CPUx86.Move { DestinationReg = CPUx86.Registers.EAX, SourceReg = CPUx86.Registers.ESP, SourceIsIndirect = true };
		//             new CPUx86.Compare { DestinationReg = CPUx86.Registers.EAX, SourceValue = 0 };
		//             new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.Zero, DestinationLabel = mReturnNullLabel };
		//             new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true };
		// 			Assembler.StackContents.Push(new StackContent(4, typeof(uint)));
		//             new CPUx86.Push { DestinationRef = ElementReference.New(mTypeIdLabel), DestinationIsIndirect=true };
		// 			Assembler.StackContents.Push(new StackContent(4, typeof(uint)));
		//             MethodBase xMethodIsInstance = ReflectionUtilities.GetMethodBase(ReflectionUtilities.GetType("", "Indy.IL2CPU.VTablesImpl"), "IsInstance", "System.Int32", "System.Int32");
		// 			Op xOp = new Call(xMethodIsInstance, mCurrentILOffset, mDebugMode, mThisLabel + "_After_IsInstance_Call");
		// 			xOp.Assembler = Assembler;
		//             xOp.SetServiceProvider(GetServiceProvider());
		// 			xOp.Assemble();
		// 		    new Label(mThisLabel + "_After_IsInstance_Call");
		//             new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
		// 			Assembler.StackContents.Pop();
		//             new CPUx86.Compare { DestinationReg = CPUx86.Registers.EAX, SourceValue = 0 };
		//             new CPUx86.ConditionalJump { Condition = CPUx86.ConditionalTestEnum.Equal, DestinationLabel = mReturnNullLabel };
		//             new CPUx86.Pop { DestinationReg = CPUx86.Registers.EAX };
		// 			uint xSize = xTypeSize;
		// 			if (xSize % 4 > 0) {
		// 				xSize += 4 - (xSize % 4);
		// 			}
		// 			int xItems =(int) xSize /4;
		// 			for (int i = xItems - 1; i >= 0; i--) {
		//                 new CPUx86.Push { DestinationReg = CPUx86.Registers.EAX, DestinationIsIndirect = true, DestinationDisplacement = ((i * 4) + ObjectImpl.FieldDataOffset) };
		// 			}
		// 			Assembler.StackContents.Push(new StackContent((int)xTypeSize, mType));
		//             new CPUx86.Jump { DestinationLabel = mNextOpLabel };
		// 			new CPU.Label(mReturnNullLabel);
		//             new CPUx86.Add { DestinationReg = CPUx86.Registers.ESP, SourceValue = 4 };
		//             new CPUx86.Push { DestinationValue = 0 };
		// 			Assembler.StackContents.Push(new StackContent(4, typeof(object)));
		// 		}
		// 	}
		// }
	}
}