#include <Main.h>
#include <3ds.h>

HDC			hDC=NULL;		// Private GDI Device Context

HGLRC		hRC=NULL;		// Permanent Rendering Context

HWND		hWnd=NULL;		// Holds Our Window Handle

HINSTANCE	hInstance;		// Holds The Instance Of The Application


bool	keys[256];			// Array Used For The Keyboard Routine

bool	active=TRUE;		// Window Active Flag Set To TRUE By Default

bool	fullscreen=TRUE;	// Fullscreen Flag Set To Fullscreen Mode By Default


#define FILE_NAME  "face.3ds"							// This is the 3D file we will load.


UINT g_Texture[MAX_TEXTURES] = {0};						// This holds the texture info, referenced by an ID


CLoad3DS g_Load3ds;										// This is 3DS class.  This should go in a good model class.

t3DModel g_3DModel;										// This holds the 3D Model info that we load in


int   g_ViewMode	  = GL_TRIANGLES;	

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

void LoadScene(GLvoid)
{
	g_Load3ds.Import3DS(&g_3DModel, FILE_NAME);			// Load our .3DS file into our model structure


	// Depending on how many textures we found, load each one (Assuming .BMP)

	// If you want to load other files than bitmaps, you will need to adjust CreateTexture().

	// Below, we go through all of the materials and check if they have a texture map to load.

	// Otherwise, the material just holds the color information and we don''t need to load a texture.


	// Go through all the materials

	for(int i = 0; i < g_3DModel.numOfMaterials; i++)
	{
		// Check to see if there is a file name to load in this material

		if(strlen(g_3DModel.pMaterials[i].strFile) > 0)
		{
			// Use the name of the texture file to load the bitmap, with a texture ID (i).

			// We pass in our global texture array, the name of the texture, and an ID to reference it.	

			CreateTexture(g_Texture, g_3DModel.pMaterials[i].strFile, i);			
		}

		// Set the texture ID for this material

		g_3DModel.pMaterials[i].textureId = i;
	}

}

int DrawGLScene(GLvoid)									// Here''s Where We Do All The Drawing

{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear Screen And Depth Buffer

	glLoadIdentity();

	LoadScene();

	for(int i = 0; i < g_3DModel.numOfObjects; i++)
	{
		// Make sure we have valid objects just in case. (size() is in the vector class)

		if(g_3DModel.pObject.size() <= 0) break;

		// Get the current object that we are displaying

		t3DObject *pObject = &g_3DModel.pObject[i];
			
		// Check to see if this object has a texture map, if so bind the texture to it.

		if(pObject->bHasTexture) {

			// Turn on texture mapping and turn off color

			glEnable(GL_TEXTURE_2D);

			// Reset the color to normal again

			glColor3ub(255, 255, 255);

			// Bind the texture map to the object by it''s materialID

			glBindTexture(GL_TEXTURE_2D, g_Texture[pObject->materialID]);
		} else {

			// Turn off texture mapping and turn on color

			glDisable(GL_TEXTURE_2D);

			// Reset the color to normal again

			glColor3ub(255, 255, 255);
		}

		// This determines if we are in wireframe or normal mode

		glBegin(g_ViewMode);					// Begin drawing with our selected mode (triangles or lines)


			// Go through all of the faces (polygons) of the object and draw them

			for(int j = 0; j < pObject->numOfFaces; j++)
			{
				// Go through each corner of the triangle and draw it.

				for(int whichVertex = 0; whichVertex < 3; whichVertex++)
				{
					// Get the index for each point of the face

					int index = pObject->pFaces[j].vertIndex[whichVertex];
			
					// Give OpenGL the normal for this vertex.

					glNormal3f(pObject->pNormals[ index ].x, pObject->pNormals[ index ].y, pObject->pNormals[ index ].z);
				
					// If the object has a texture associated with it, give it a texture coordinate.

					if(pObject->bHasTexture) {

						// Make sure there was a UVW map applied to the object or else it won''t have tex coords.

						if(pObject->pTexVerts) {
							glTexCoord2f(pObject->pTexVerts[ index ].x, pObject->pTexVerts[ index ].y);
						}
					} else {

						// Make sure there is a valid material/color assigned to this object.

						// You should always at least assign a material color to an object, 

						// but just in case we want to check the size of the material list.

						// if the size is at least one, and the material ID != -1,

						// then we have a valid material.

						if(g_3DModel.pMaterials.size() && pObject->materialID >= 0) 
						{
							// Get and set the color that the object is, since it must not have a texture

							BYTE *pColor = g_3DModel.pMaterials[pObject->materialID].color;

							// Assign the current color to this model

							glColor3ub(pColor[0], pColor[1], pColor[2]);
						}
					}

					// Pass in the current vertex of the object (Corner of current face)

					glVertex3f(pObject->pVerts[ index ].x, pObject->pVerts[ index ].y, pObject->pVerts[ index ].z);
				}
			}

		glEnd();								// End the drawing

	}


	return TRUE;										// Everything Went OK

}

int WINAPI WinMain(	HINSTANCE	hInstance,			// Instance

					HINSTANCE	hPrevInstance,		// Previous Instance

					LPSTR		lpCmdLine,			// Command Line Parameters

					int			nCmdShow)			// Window Show State

{
	MSG		msg;									// Windows Message Structure

	BOOL	done=FALSE;								// Bool Variable To Exit Loop


	// Ask The User Which Screen Mode They Prefer

	if (MessageBox(NULL,"Would You Like To Run In Fullscreen Mode?", "Start FullScreen?",MB_YESNO|MB_ICONQUESTION)==IDNO)
	{
		fullscreen=FALSE;							// Windowed Mode

	}

	// Create Our OpenGL Window

	if (!CreateGLWindow("Raja''s 3ds game! i did it!",640,480,16,fullscreen))
	{
		return 0;									// Quit If Window Was Not Created

	}

	while(!done)									// Loop That Runs While done=FALSE

	{
		if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))	// Is There A Message Waiting?

		{
			if (msg.message==WM_QUIT)				// Have We Received A Quit Message?

			{
				done=TRUE;
				for(int i = 0; i < g_3DModel.numOfObjects; i++)
				{
					delete [] g_3DModel.pObject[i].pFaces;
					delete [] g_3DModel.pObject[i].pNormals;
					delete [] g_3DModel.pObject[i].pVerts;
					delete [] g_3DModel.pObject[i].pTexVerts;
				}
			}
			else									// If Not, Deal With Window Messages

			{
				TranslateMessage(&msg);				// Translate The Message

				DispatchMessage(&msg);				// Dispatch The Message

			}
		}
		else										// If There Are No Messages

		{
			// Draw The Scene.  Watch For ESC Key And Quit Messages From DrawGLScene()

			if (active)								// Program Active?

			{
				if (keys[VK_ESCAPE])				// Was ESC Pressed?

				{
					done=TRUE;						// ESC Signalled A Quit

				}
				else								// Not Time To Quit, Update Screen

				{
					DrawGLScene();					// Draw The Scene

					SwapBuffers(hDC);				// Swap Buffers (Double Buffering)

				}
			}

			if (keys[VK_F1])						// Is F1 Being Pressed?

			{
				keys[VK_F1]=FALSE;					// If So Make Key FALSE

				KillGLWindow();						// Kill Our Current Window

				fullscreen=!fullscreen;				// Toggle Fullscreen / Windowed Mode

				// Recreate Our OpenGL Window

				if (!CreateGLWindow("Raja''s 3ds game! i did it!",640,480,16,fullscreen))
				{
					return 0;						// Quit If Window Was Not Created

				}
			}
		}
	}

	// Shutdown

	KillGLWindow();									// Kill The Window

	return (msg.wParam);							// Exit The Program

}