#region License
/* 
 * Copyright (C) 1999-2024 John Källén.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#endregion

using Reko.Core;
using Reko.Core.Expressions;
using Reko.Core.Machine;
using Reko.Core.Memory;
using Reko.Core.Rtl;
using Reko.Core.Types;
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.Intrinsics.Arm;

namespace Reko.ImageLoaders.WebAssembly
{
    public class WasmArchitecture : ProcessorArchitecture
    {
        public WasmArchitecture(IServiceProvider services, string archId, Dictionary<string, object> options)
            : base(services, archId, options, null, null)
        {
            this.Endianness = EndianServices.Little;
            this.PointerType = PrimitiveType.Ptr32;
            this.FramePointerType = PrimitiveType.Ptr32;
            this.StackRegister = new RegisterStorage("sp", 0, 0, PointerType);
            this.WordWidth = PrimitiveType.Word32;
            this.InstructionBitSize = 8;
        }

        public override IEnumerable<MachineInstruction> CreateDisassembler(EndianImageReader rdr)
        {
            var bytes = ((ByteImageReader) rdr).Bytes;
            var wrdr = new WasmImageReader(new ByteMemoryArea(rdr.Address - rdr.Offset, bytes))
            {
                Offset = rdr.Offset
            };
            return new WasmDisassembler(this, wrdr);
        }

        public override IEqualityComparer<MachineInstruction> CreateInstructionComparer(Normalize norm)
        {
            throw new NotImplementedException();
        }

        public override IEnumerable<Address> CreatePointerScanner(SegmentMap map, EndianImageReader rdr, IEnumerable<Address> knownAddresses, PointerScannerFlags flags)
        {
            throw new NotImplementedException();
        }

        public override ProcessorState CreateProcessorState()
        {
            return new DefaultProcessorState(this);
        }

        public override IEnumerable<RtlInstructionCluster> CreateRewriter(EndianImageReader rdr, ProcessorState state, IStorageBinder binder, IRewriterHost host)
        {
            var bytes = ((ByteImageReader) rdr).Bytes;
            var wrdr = new WasmImageReader(new ByteMemoryArea(rdr.Address - rdr.Offset, bytes))
            {
                Offset = rdr.Offset
            };
            return new WasmRewriter(this, wrdr, binder);
        }

        public override Expression CreateStackAccess(IStorageBinder frame, int cbOffset, DataType dataType)
        {
            throw new NotImplementedException();
        }

        public override FlagGroupStorage GetFlagGroup(string name)
        {
            throw new NotImplementedException();
        }

        public override FlagGroupStorage GetFlagGroup(RegisterStorage flagRegister, uint grf)
        {
            throw new NotImplementedException();
        }

        public override SortedList<string, int> GetMnemonicNames()
        {
            throw new NotImplementedException();
        }

        public override int? GetMnemonicNumber(string name)
        {
            throw new NotImplementedException();
        }

        public override RegisterStorage[] GetRegisters()
        {
            throw new NotImplementedException();
        }

        public override string GrfToString(RegisterStorage flagRegister, string prefix, uint grf)
        {
            throw new NotImplementedException();
        }

        public override Address MakeAddressFromConstant(Constant c, bool codeAlign)
        {
            return Address.Ptr32(c.ToUInt32());
        }

        public override Address? ReadCodeAddress(int size, EndianImageReader? rdr, ProcessorState? state)
        {
            throw new NotImplementedException();
        }

        public override bool TryGetRegister(string name, [MaybeNullWhen(false)] out RegisterStorage reg)
        {
            throw new NotImplementedException();
        }

        public override bool TryParseAddress(string? txtAddr, [MaybeNullWhen(false)] out Address addr)
        {
            return Address32.TryParse32(txtAddr, out addr); 
        }
    }
}
