using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;

namespace UltraCombos.Utility
{
    public class D3D
    {
        const string dllName = "UnityUtilityNativePlugin";

        [DllImport(dllName, EntryPoint = "GetDevice")]
        public static extern IntPtr GetDevice();

        [DllImport(dllName, EntryPoint = "GetContext")]
        public static extern IntPtr GetContext();

        [DllImport(dllName, EntryPoint = "ReleaseContext")]
        public static extern void ReleaseContext(IntPtr context);
    }

    public class Buffer
    {
        const string dllName = "UnityUtilityNativePlugin";

        [DllImport(dllName, EntryPoint = "CreateBuffer")]
        public static extern IntPtr Create(IntPtr bufferHandle);

        [DllImport(dllName, EntryPoint = "SetBufferData")]
        public static extern bool SetData(IntPtr bufferHandle, IntPtr data, int dataSize);

        [DllImport(dllName, EntryPoint = "GetBufferData")]
        public static extern bool GetData(IntPtr bufferHandle, IntPtr data, int dataSize);

        [DllImport(dllName, EntryPoint = "CopyResource")]
        public static extern void Copy(IntPtr dstHandle, IntPtr srcHandle);

        [DllImport(dllName, EntryPoint = "ReleaseBuffer")]
        public static extern void Release(IntPtr bufferHandle);

        [DllImport(dllName, EntryPoint = "GetBufferSize")]
        public static extern int GetSize(IntPtr bufferHandle);

        [DllImport(dllName, EntryPoint = "GetBufferStride")]
        public static extern int GetStride(IntPtr bufferHandle);

        public static void GetDataImpl(IntPtr bufferHandle, IntPtr data, int dataSize)
        {
            IntPtr handle = NativeBufferPool.Instance.GetReference(bufferHandle);
            Copy(handle, bufferHandle);
            if (GetData(handle, data, dataSize) == false)
                Debug.Log("GetDataImpl fail");
        }

        public static void SetDataImpl(IntPtr bufferHandle, IntPtr data, int dataSize)
        {
            IntPtr handle = NativeBufferPool.Instance.GetReference(bufferHandle);
            if (SetData(handle, data, dataSize))
                Copy(bufferHandle, handle);
            else Debug.Log("SetDataImpl fail");
        }
    }

    public class Texture
    {
        const string dllName = "UnityUtilityNativePlugin";

        [DllImport(dllName, EntryPoint = "CreateTexture")]
        public static extern IntPtr Create(IntPtr textureHandle, ref int height, ref int width);

        [DllImport(dllName, EntryPoint = "SetTextureData")]
        public static extern void SetData(IntPtr textureHandle, IntPtr data, int height, int width);

        [DllImport(dllName, EntryPoint = "GetTextureData")]
        public static extern void GetData(IntPtr textureHandle, IntPtr data, int height, int width);

        [DllImport(dllName, EntryPoint = "CopyResource")]
        public static extern void Copy(IntPtr dstHandle, IntPtr srcHandle);

        [DllImport(dllName, EntryPoint = "ReleaseTexture")]
        public static extern void Release(IntPtr textureHandle);
        /*
        public static void SetDataImpl(IntPtr bufferHandle, IntPtr data, int dataSize)
        {
            IntPtr handle = NativeBufferPool.Instance.GetReference(bufferHandle);
            SetData(handle, data, dataSize);
            Copy(bufferHandle, handle);
        }
        */
    }

    public class Flatbuffers
    {
        const string dllName = "UnityUtilityNativePlugin";

        [DllImport(dllName, EntryPoint = "FlatbuffersParse")]
        public static extern IntPtr Parse([MarshalAs(UnmanagedType.LPStr)]string schemafile, IntPtr flatbuffer);
    }

    public class Memory
    {
        [DllImport("msvcrt.dll", EntryPoint = "memcpy")]
        public static extern void Copy(IntPtr dst, IntPtr src, int size);

        [DllImport("msvcrt.dll", EntryPoint = "memset")]
        public static extern void Set(IntPtr dst, int val, int size);

        public static void Swap<T>(ref T lhs, ref T rhs)
        {
            T temp = lhs;
            lhs = rhs;
            rhs = temp;
        }
    }
}