using ChocolArm64.Events;
using ChocolArm64.Memory;
using ChocolArm64.State;
using Ryujinx.Core.OsHle.Handles;
using System;
using System.Collections.Generic;

namespace Ryujinx.Core.OsHle.Svc
{
    partial class SvcHandler : IDisposable
    {
        private delegate void SvcFunc(AThreadState ThreadState);

        private Dictionary<int, SvcFunc> SvcFuncs;

        private Switch  Ns;
        private Process Process;
        private AMemory Memory;

        private HashSet<(HSharedMem, long)> MappedSharedMems;

        private ulong CurrentHeapSize;

        private static Random Rng;

        public SvcHandler(Switch Ns, Process Process)
        {
            SvcFuncs = new Dictionary<int, SvcFunc>()
            {
                { 0x01, SvcSetHeapSize                   },
                { 0x03, SvcSetMemoryAttribute            },
                { 0x04, SvcMapMemory                     },
                { 0x05, SvcUnmapMemory                   },
                { 0x06, SvcQueryMemory                   },
                { 0x07, SvcExitProcess                   },
                { 0x08, SvcCreateThread                  },
                { 0x09, SvcStartThread                   },
                { 0x0a, SvcExitThread                    },
                { 0x0b, SvcSleepThread                   },
                { 0x0c, SvcGetThreadPriority             },
                { 0x0d, SvcSetThreadPriority             },
                { 0x0f, SvcSetThreadCoreMask             },
                { 0x10, SvcGetCurrentProcessorNumber     },
                { 0x12, SvcClearEvent                    },
                { 0x13, SvcMapSharedMemory               },
                { 0x14, SvcUnmapSharedMemory             },
                { 0x15, SvcCreateTransferMemory          },
                { 0x16, SvcCloseHandle                   },
                { 0x17, SvcResetSignal                   },
                { 0x18, SvcWaitSynchronization           },
                { 0x1a, SvcArbitrateLock                 },
                { 0x1b, SvcArbitrateUnlock               },
                { 0x1c, SvcWaitProcessWideKeyAtomic      },
                { 0x1d, SvcSignalProcessWideKey          },
                { 0x1e, SvcGetSystemTick                 },
                { 0x1f, SvcConnectToNamedPort            },
                { 0x21, SvcSendSyncRequest               },
                { 0x22, SvcSendSyncRequestWithUserBuffer },
                { 0x25, SvcGetThreadId                   },
                { 0x26, SvcBreak                         },
                { 0x27, SvcOutputDebugString             },
                { 0x29, SvcGetInfo                       }
            };

            this.Ns      = Ns;
            this.Process = Process;
            this.Memory  = Process.Memory;

            MappedSharedMems = new HashSet<(HSharedMem, long)>();
        }

        static SvcHandler()
        {
            Rng = new Random();
        }

        public void SvcCall(object sender, AInstExceptionEventArgs e)
        {
            AThreadState ThreadState = (AThreadState)sender;

            if (SvcFuncs.TryGetValue(e.Id, out SvcFunc Func))
            {
                Logging.Trace(LogClass.KernelSvc, $"(Thread {ThreadState.ThreadId}) {Func.Method.Name} called.");

                Func(ThreadState);

                Logging.Trace(LogClass.KernelSvc, $"(Thread {ThreadState.ThreadId}) {Func.Method.Name} ended.");
            }
            else
            {
                throw new NotImplementedException(e.Id.ToString("x4"));
            }
        }

        public void Dispose()
        {
            Dispose(true);
        }

        protected virtual void Dispose(bool Disposing)
        {
            if (Disposing)
            {
                lock (MappedSharedMems)
                {
                    foreach ((HSharedMem SharedMem, long Position) in MappedSharedMems)
                    {
                        SharedMem.RemoveVirtualPosition(Memory, Position);
                    }

                    MappedSharedMems.Clear();
                }
            }
        }
    }
}