#ifndef BOO_WINCOMMON_HPP
#define BOO_WINCOMMON_HPP

#include <unordered_map>
#include "boo/IWindow.hpp"

namespace boo {class IWindow;}

#if _WIN32_WINNT_WIN10
#include <dxgi1_4.h>
#include <d3d12.h>
#include <d3d11_1.h>
#include <d3dcompiler.h>
#include <wingdi.h>


#elif _WIN32_WINNT_WIN7
#include <dxgi1_2.h>
#include <d3d11_1.h>
#include <d3dcompiler.h>
#include <wingdi.h>
#else
#error Unsupported Windows target
#endif

struct D3D12Context
{
    ComPtr<IDXGIFactory2> m_dxFactory;
    ComPtr<ID3D12Device> m_dev;
    ComPtr<ID3D12CommandAllocator> m_qalloc[2];
    ComPtr<ID3D12CommandQueue> m_q;
    ComPtr<ID3D12CommandAllocator> m_loadqalloc;
    ComPtr<ID3D12CommandQueue> m_loadq;
    ComPtr<ID3D12Fence> m_loadfence;
    UINT64 m_loadfenceval = 0;
    HANDLE m_loadfencehandle;
    ComPtr<ID3D12GraphicsCommandList> m_loadlist;
    ComPtr<ID3D12RootSignature> m_rs;
    struct Window
    {
        ComPtr<IDXGISwapChain3> m_swapChain;
        std::unordered_map<ID3D12Resource*, ComPtr<ID3D12DescriptorHeap>> m_rtvHeaps;
        UINT m_backBuf = 0;
        bool m_needsResize = false;
        size_t width, height;
    };
    std::unordered_map<const boo::IWindow*, Window> m_windows;

    uint32_t m_sampleCount = 1;
    uint32_t m_anisotropy = 1;

    struct RGBATex2DFBViewDesc : D3D12_SHADER_RESOURCE_VIEW_DESC
    {
        RGBATex2DFBViewDesc()
        {
            Format = DXGI_FORMAT_R8G8B8A8_UNORM;
            ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
            Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
            Texture2D = {UINT(0), UINT(1), UINT(0), 0.0f};
        }
    } RGBATex2DFBViewDesc;
};

struct D3D11Context
{
    ComPtr<IDXGIFactory2> m_dxFactory;
    ComPtr<ID3D11Device1> m_dev;
    ComPtr<ID3D11DeviceContext1> m_devCtx;
    ComPtr<ID3D11SamplerState> m_ss[5];
    struct Window
    {
        ComPtr<IDXGISwapChain1> m_swapChain;
        ComPtr<ID3D11Texture2D> m_swapChainTex;
        ComPtr<ID3D11RenderTargetView> m_swapChainRTV;
        bool m_needsResize = false;
        size_t width, height;

        bool m_needsFSTransition = false;
        bool m_fs = false;
        DXGI_MODE_DESC m_fsdesc = {};

        void clearRTV()
        {
            m_swapChainTex.Reset();
            m_swapChainRTV.Reset();
        }

        void setupRTV(ComPtr<IDXGISwapChain1>& sc, ID3D11Device* dev)
        {
            m_swapChain = sc;
            m_swapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), &m_swapChainTex);
            D3D11_TEXTURE2D_DESC resDesc;
            m_swapChainTex->GetDesc(&resDesc);
            width = resDesc.Width;
            height = resDesc.Height;
            CD3D11_RENDER_TARGET_VIEW_DESC rtvDesc(D3D11_RTV_DIMENSION_TEXTURE2D, resDesc.Format);
            dev->CreateRenderTargetView(m_swapChainTex.Get(), &rtvDesc, &m_swapChainRTV);
        }
    };
    std::unordered_map<const boo::IWindow*, Window> m_windows;

    uint32_t m_sampleCount = 1;
    uint32_t m_anisotropy = 1;
    DXGI_FORMAT m_fbFormat = DXGI_FORMAT_R8G8B8A8_UNORM;
};

struct Boo3DAppContext
{
    D3D11Context m_ctx11;

    void resize(boo::IWindow* window, size_t width, size_t height)
    {
        D3D11Context::Window& win = m_ctx11.m_windows[window];
        win.width = width;
        win.height = height;
        win.m_needsResize = true;
    }
};

static inline std::string WCSTMBS(const wchar_t* wstr)
{
    int sizeNeeded = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, nullptr, 0, nullptr, nullptr) - 1;
    std::string strTo(sizeNeeded, 0);
    WideCharToMultiByte(CP_UTF8, 0, wstr, -1, &strTo[0], sizeNeeded, nullptr, nullptr);
    return strTo;
}

static inline std::wstring MBSTWCS(const char* str)
{
    int sizeNeeded = MultiByteToWideChar(CP_UTF8, 0, str, -1, nullptr, 0) - 1;
    std::wstring strTo(sizeNeeded, 0);
    MultiByteToWideChar(CP_UTF8, 0, str, -1, &strTo[0], sizeNeeded);
    return strTo;
}

#endif // BOO_WINCOMMON_HPP