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#include <Windows.h>
#include <tchar.h>
#include <d3d9.h>
#include <d3dx9.h>
#include <d3dx9mesh.h>
#include <d3dx9shape.h>
#include <MMSystem.h>

#pragma comment(lib, "d3d9.lib")
#pragma comment(lib, "d3dx9.lib")
#pragma comment(lib, "winmm.lib")

TCHAR szWindowClass[] = _T("GPWDirectX");
TCHAR szWindowTitle[] = _T("Graphics programming with DirectX");

IDirect3D9 *g_pDirect = NULL;
IDirect3DDevice9 *g_pDevice = NULL;
ID3DXMesh *g_pMesh = NULL;
ID3DXBuffer *g_pBuffer = NULL;
D3DMATERIAL9 *g_pMaterial = NULL;
LPDIRECT3DTEXTURE9 *g_pTexture = NULL;
D3DXMATRIX g_mWorld, g_mView, g_mProjection;

struct CUSTOMVERTEX
{
    FLOAT x, y, z;
    FLOAT nx, ny, nz;
    FLOAT tu, tv;
};

#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ | D3DFVF_NORMAL | D3DFVF_TEX1)

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE, LPTSTR lpCmdLine, int nCmdShow)
{
    WNDCLASS wc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hInstance = hInstance;
    wc.lpfnWndProc = WndProc;
    wc.lpszClassName = szWindowClass;
    wc.lpszMenuName = NULL;
    wc.style = CS_VREDRAW | CS_HREDRAW | CS_DBLCLKS | CS_OWNDC;
    if (!RegisterClass(&wc))
    {
        return 0;
    }

    HWND hWnd = CreateWindow(szWindowClass, szWindowTitle, WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, HWND_DESKTOP, NULL, hInstance, NULL);
    if (!hWnd)
    {
        return 0;
    }

    g_pDirect = Direct3DCreate9(D3D_SDK_VERSION);
    if (g_pDirect == NULL)
    {
    }
    
    D3DDISPLAYMODE dm;
    HRESULT hr = g_pDirect->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &dm);
    if (FAILED(hr))
    {
    }

    D3DPRESENT_PARAMETERS pp;
    ZeroMemory(&pp, sizeof(D3DPRESENT_PARAMETERS));
    pp.BackBufferFormat = dm.Format;
    pp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    pp.Windowed = TRUE;
    hr = g_pDirect->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
        D3DCREATE_HARDWARE_VERTEXPROCESSING, &pp, &g_pDevice);
    if (FAILED(hr))
    {
    }

    g_pDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_CW);
    g_pDevice->SetRenderState(D3DRS_LIGHTING, FALSE);
    
    DWORD dwNumber;
    hr = D3DXLoadMeshFromX(_T("C:\\Users\\Роман\\Documents\\Visual Studio 2010\\Projects\\Graphics programming with DirectX\\Debug\\LandShark.x"),
        D3DXMESH_SYSTEMMEM, g_pDevice, NULL, &g_pBuffer, NULL, &dwNumber, &g_pMesh);
    if (FAILED(hr))
    {
    }

    D3DXMATERIAL *pMaterials = (D3DXMATERIAL *)g_pBuffer->GetBufferPointer();

    g_pMaterial = new D3DMATERIAL9[dwNumber];
    g_pTexture = new LPDIRECT3DTEXTURE9[dwNumber];

    for (DWORD i = 0; i < dwNumber; i++)
    {
        g_pMaterial[i] = pMaterials[i].MatD3D;
        g_pMaterial[i].Ambient = g_pMaterial[i].Diffuse;
        g_pTexture[i] = NULL;
        MessageBox(NULL, GetCommandLine(), NULL, NULL);
        hr = D3DXCreateTextureFromFileA(g_pDevice, "C:\\Users\\Роман\\Documents\\Visual Studio 2010\\Projects\\Graphics programming with DirectX\\Debug\\Speeder_diff.jpg", &g_pTexture[i]);
        if (FAILED(hr))
        {
        }
    }

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    MSG msg;
    ZeroMemory(&msg, sizeof(MSG));
    while (msg.message != WM_QUIT)
    {
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else
        {
            g_pDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);
            g_pDevice->BeginScene();

            UINT uTime = timeGetTime() % 50000;
            FLOAT fAngle = uTime * (0.5f * D3DX_PI) / 5000.0f;
            D3DXMatrixRotationY(&g_mWorld, fAngle);
            g_pDevice->SetTransform(D3DTS_WORLD, &g_mWorld);

            D3DXMatrixLookAtLH(&g_mView, &D3DXVECTOR3(0.0f, 0.0f, -1000.0f), 
                &D3DXVECTOR3(0.0f, 0.0f, 0.0f), &D3DXVECTOR3(0.0f, 1.0f, 0.0f));
            g_pDevice->SetTransform(D3DTS_VIEW, &g_mView);

            D3DXMatrixPerspectiveFovLH(&g_mProjection, D3DX_PI / 4, 1.0f, 1.0f, 2000.0f);
            g_pDevice->SetTransform(D3DTS_PROJECTION, &g_mProjection);
            
            for (DWORD i = 0; i < dwNumber; i++)
            {
                g_pDevice->SetMaterial(&g_pMaterial[i]);
                g_pDevice->SetTexture(0, g_pTexture[i]);
                
                g_pMesh->DrawSubset(i);
            }

            g_pDevice->EndScene();
            g_pDevice->Present(NULL, NULL, NULL, NULL);
        }
    }
    return 0;
}