#include <math.h>

#ifndef Player_H
#define Player_H

struct Loc2d
{
    float X;
    float Y;
};

struct color
{
    float R;
    float G;
    float B;
};

struct Corner2d
{
    Loc2d XY;
    color RGB;
};

//Holds triangle data
struct TriangleData
{
    float Angle;
    Loc2d DisXY;
    Corner2d A;
    Corner2d B;
    Corner2d C;
    
    void Draw()
    {
        glRotatef 
        (
            Angle,
            A.XY.X + B.XY.X + C.XY.X ,
            A.XY.Y + B.XY.Y + C.XY.X ,
            0.0f);
        
        
        glBegin (GL_TRIANGLES);
        glColor3f (A.RGB.R , A.RGB.G, A.RGB.B);   
        glVertex2f ( A.XY.X + DisXY.X, A.XY.Y + DisXY.Y);
        glColor3f (B.RGB.R , B.RGB.G, B.RGB.B);   
        glVertex2f ( B.XY.X + DisXY.X, B.XY.Y + DisXY.Y);
        glColor3f (C.RGB.R , C.RGB.G, C.RGB.B);   
        glVertex2f ( C.XY.X + DisXY.X, C.XY.Y + DisXY.Y);
        glEnd (); 
    }
    
};

struct SpaceShip
{
    TriangleData Triangle;
    
    int TurningSpeed;
    float MovingSpeed;
    
    void Move()
    {
        if ( GetAsyncKeyState(VK_UP))
        {
            Triangle.DisXY.X += MovingSpeed * sin( Triangle.Angle/(180/M_PI));
            Triangle.DisXY.Y += MovingSpeed * cos( Triangle.Angle/(180/M_PI));
        }
        if ( GetAsyncKeyState(VK_DOWN))
        {
            Triangle.DisXY.X -= MovingSpeed * sin( Triangle.Angle/(180/M_PI));
            Triangle.DisXY.Y -= MovingSpeed * cos( Triangle.Angle/(180/M_PI));
        } 
        if ( GetAsyncKeyState(VK_LEFT))
        {
            Triangle.Angle += TurningSpeed;
        } 
        if ( GetAsyncKeyState(VK_RIGHT))
        {
            Triangle.Angle -= TurningSpeed;
        } 
    }
};

#endif

/*************
MAIN.cpp
*************/

#include <windows.h>
#include <gl/gl.h>

#include <math.h>

#include "Player.h"

/**************************
 * Function Declarations
 *
 **************************/

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam);
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC);
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC);
void EnableSDL ();

/**************************
 * WinMain
 *
 **************************/

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,LPSTR lpCmdLine,int iCmdShow)
{
    WNDCLASS wc;
    HWND hWnd;
    HDC hDC;
    HGLRC hRC;        
    MSG msg;
    BOOL bQuit = FALSE;
    float theta = 0.0f;

    /* register window class */
    wc.style = CS_OWNDC;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor (NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = "GLSample";
    RegisterClass (&wc);

    /* create main window */
    hWnd = CreateWindow ("GLSample","MirFly",WS_CAPTION|WS_POPUPWINDOW|WS_VISIBLE,64,64,600,600,NULL,NULL,hInstance,NULL);
    /* enable OpenGL for the window */
    EnableOpenGL (hWnd, &hDC, &hRC);
    
    /*Declaring Moving object*/
    SpaceShip Player;
    
    Player.Triangle.Angle = 0;        Player.Triangle.DisXY.X = 0;     Player.Triangle.DisXY.Y = 0;
    Player.Triangle.A.RGB.R = 0.9f;   Player.Triangle.A.RGB.G = 0.0f;  Player.Triangle.A.RGB.B = 0.0f;
    Player.Triangle.B.RGB.R = 0.1f;   Player.Triangle.B.RGB.G = 0.0f;  Player.Triangle.B.RGB.B = 0.0f;
    Player.Triangle.C.RGB.R = 0.1f;   Player.Triangle.C.RGB.G = 0.0f;  Player.Triangle.C.RGB.B = 0.0f;
    Player.Triangle.A.XY.X = 0.0f;    Player.Triangle.A.XY.Y = 0.0433f;
    Player.Triangle.B.XY.X = 0.05f;   Player.Triangle.B.XY.Y = -0.04375f;
    Player.Triangle.C.XY.X = -0.05f;  Player.Triangle.C.XY.Y = -0.04375f;
    Player.TurningSpeed = 3;
    Player.MovingSpeed = 0.01f;
    
    /* program main loop */
    while (!bQuit)
    {
        /* check for messages */
        if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
        {
            /* handle or dispatch messages */
            if (msg.message == WM_QUIT)
            {
                bQuit = TRUE;
            }
            else
            {
                TranslateMessage (&msg);
                DispatchMessage (&msg);
            }
        }
        else
        {
            Player.Move();
            
            /* OpenGL animation code goes here */
            
            glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
            glClear (GL_COLOR_BUFFER_BIT);

            glPushMatrix ();
            Player.Triangle.Draw();
            
            glPopMatrix ();

            SwapBuffers (hDC);
            Sleep (1);      
        }
    }

    /* shutdown OpenGL */
    DisableOpenGL (hWnd, hDC, hRC);

    /* destroy the window explicitly */
    DestroyWindow (hWnd);

    return msg.wParam;
}


/********************
 * Window Procedure
 *
 ********************/

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
                          WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_CREATE:
        return 0;
    case WM_CLOSE:
        PostQuitMessage (0);
        return 0;

    case WM_DESTROY:
        return 0;

    case WM_KEYDOWN:
        switch (wParam)
        {
        case VK_ESCAPE:
            PostQuitMessage(0);
            return 0;
        }
        return 0;

    default:
        return DefWindowProc (hWnd, message, wParam, lParam);
    }
}

//Enables OpenGL
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC)
{
    PIXELFORMATDESCRIPTOR pfd;
    int iFormat;

    /* get the device context (DC) */
    *hDC = GetDC (hWnd);

    /* set the pixel format for the DC */
    ZeroMemory (&pfd, sizeof (pfd));
    pfd.nSize = sizeof (pfd);
    pfd.nVersion = 1;
    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
    pfd.iPixelType = PFD_TYPE_RGBA;
    pfd.cColorBits = 24;
    pfd.cDepthBits = 16;
    pfd.iLayerType = PFD_MAIN_PLANE;
    iFormat = ChoosePixelFormat (*hDC, &pfd);
    SetPixelFormat (*hDC, iFormat, &pfd);

    /* create and enable the render context (RC) */
    *hRC = wglCreateContext( *hDC );
    wglMakeCurrent( *hDC, *hRC );
}

//Disables OpenGL
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC)
{
    wglMakeCurrent (NULL, NULL);
    wglDeleteContext (hRC);
    ReleaseDC (hWnd, hDC);
}