using Ryujinx.Common;
using Ryujinx.HLE.HOS;
using Ryujinx.HLE.HOS.Ipc;
using Ryujinx.HLE.HOS.Services;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Text;

namespace Ryujinx.HLE.Exceptions
{
    [Serializable]
    internal class ServiceNotImplementedException : Exception
    {
        public IpcService Service { get; }
        public ServiceCtx Context { get; }
        public IpcMessage Request { get; }
        private string MethodName { get; }

        public ServiceNotImplementedException(IpcService service, ServiceCtx context, string message = "The service call is not implemented.", [CallerMemberName] string methodName = null) : base(message)
        {
            Service = service;
            Context = context;
            Request = context.Request;
            MethodName = methodName;
        }

        public ServiceNotImplementedException(IpcService service, ServiceCtx context, string message, Exception inner, [CallerMemberName] string methodName = null) : base(message, inner)
        {
            Service = service;
            Context = context;
            Request = context.Request;
            MethodName = methodName;
        }

        public override string Message
        {
            get
            {
                return base.Message + Environment.NewLine + Environment.NewLine + BuildMessage();
            }
        }

        private string BuildMessage()
        {
            StringBuilder sb = new();

            int commandId = Request.Type > IpcMessageType.TipcCloseSession
                ? Service.TipcCommandIdByMethodName(MethodName)
                : Service.CmifCommandIdByMethodName(MethodName);

            sb.AppendLine($"Service Command: {Service.GetType().FullName}: {commandId} ({MethodName})");
            sb.AppendLine();

            sb.AppendLine("Guest Stack Trace:");
            sb.AppendLine(Context.Thread.GetGuestStackTrace());

            // Print buffer information
            if (Request.PtrBuff.Count > 0 ||
                Request.SendBuff.Count > 0 ||
                Request.ReceiveBuff.Count > 0 ||
                Request.ExchangeBuff.Count > 0 ||
                Request.RecvListBuff.Count > 0)
            {
                sb.AppendLine("Buffer Information:");

                if (Request.PtrBuff.Count > 0)
                {
                    sb.AppendLine("\tPtrBuff:");

                    foreach (IpcPtrBuffDesc buff in Request.PtrBuff)
                    {
                        sb.AppendLine($"\t[{buff.Index}] Position: 0x{buff.Position:x16} Size: 0x{buff.Size:x16}");
                    }
                }

                if (Request.SendBuff.Count > 0)
                {
                    sb.AppendLine("\tSendBuff:");

                    foreach (IpcBuffDesc buff in Request.SendBuff)
                    {
                        sb.AppendLine($"\tPosition: 0x{buff.Position:x16} Size: 0x{buff.Size:x16} Flags: {buff.Flags}");
                    }
                }

                if (Request.ReceiveBuff.Count > 0)
                {
                    sb.AppendLine("\tReceiveBuff:");

                    foreach (IpcBuffDesc buff in Request.ReceiveBuff)
                    {
                        sb.AppendLine($"\tPosition: 0x{buff.Position:x16} Size: 0x{buff.Size:x16} Flags: {buff.Flags}");
                    }
                }

                if (Request.ExchangeBuff.Count > 0)
                {
                    sb.AppendLine("\tExchangeBuff:");

                    foreach (IpcBuffDesc buff in Request.ExchangeBuff)
                    {
                        sb.AppendLine($"\tPosition: 0x{buff.Position:x16} Size: 0x{buff.Size:x16} Flags: {buff.Flags}");
                    }
                }

                if (Request.RecvListBuff.Count > 0)
                {
                    sb.AppendLine("\tRecvListBuff:");

                    foreach (IpcRecvListBuffDesc buff in Request.RecvListBuff)
                    {
                        sb.AppendLine($"\tPosition: 0x{buff.Position:x16} Size: 0x{buff.Size:x16}");
                    }
                }

                sb.AppendLine();
            }

            sb.AppendLine("Raw Request Data:");
            sb.Append(HexUtils.HexTable(Request.RawData));

            return sb.ToString();
        }
    }
}