#include "terrain.h"
#include <SDL.h>
#include <GL/gl.h>
#include <GL/glu.h>

TerrainBlock::TerrainBlock(const char* path)
{
	char data[5][5];

	FILE* f = fopen(path, "r");
	if (f == NULL)
	{
		printf("Error opening %s\n", path);
		exit(1);
	}
	if (fread(data, 1, 25, f) != 25)
	{
		printf("Coulndt read 25 elements\n");
		exit(1);
	}

	displayList = glGenLists(5);
	for (int base = 0; base < 4; base++)
	{
		printf("displaylist = %d\n", displayList + base);
		glNewList(displayList + base, GL_COMPILE);
		glBegin(GL_TRIANGLE_STRIP);
	
		printf("%d, %d, %d\n", base + 0, data[base + 0][0], 0);
		printf("%d, %d, %d\n", base + 1, data[base + 1][0], 0);
		
		printf("%d, %d, %d\n", base + 0, data[base + 0][1], 1);
		
		printf("%d, %d, %d\n", base + 1, data[base + 1][1], 1);
		
		printf("%d, %d, %d\n", base + 0, data[base + 0][2], 2);
		
		printf("%d, %d, %d\n", base + 1, data[base + 1][2], 2);
		
		printf("%d, %d, %d\n", base + 0, data[base + 0][3], 3);
		
		printf("%d, %d, %d\n", base + 1, data[base + 1][3], 3);
		
		printf("%d, %d, %d\n", base + 0, data[base + 0][4], 4);
		
		printf("%d, %d, %d\n", base + 1, data[base + 1][4], 4);
		
		glColor3f(1.0, 1.0, 1.0);
	
		glVertex3d(base + 0, data[base + 0][0], 0);
		glVertex3d(base + 1, data[base + 1][0], 0);
	
		glVertex3d(base + 0, data[base + 0][1], 1);
	
		glVertex3d(base + 1, data[base + 1][1], 1);
	
		glVertex3d(base + 0, data[base + 0][2], 2);
	
		glVertex3d(base + 1, data[base + 1][2], 2);
	
		glVertex3d(base + 0, data[base + 0][3], 3);

		glVertex3d(base + 1, data[base + 1][3], 3);
	
		glVertex3d(base + 0, data[base + 0][4], 4);
	
		glVertex3d(base + 1, data[base + 1][4], 4);
	
		glEnd();
		glEndList();
	}
}

void TerrainBlock::render()
{
	for (int i = 0; i < 5; i++)
		glCallList(displayList + i);
}


int main(int argc, char** argv)
{
	if(SDL_Init(SDL_INIT_VIDEO) == -1)
    {
        return 1;    
    }
    SDL_Surface* screen = SDL_SetVideoMode(640, 480, 32, SDL_HWSURFACE |SDL_OPENGL | SDL_DOUBLEBUF);
    if(screen == NULL)
    {
        return 1;    
    }
	SDL_WM_SetCaption("Hej", "Hej");
	
	TerrainBlock* tb = new TerrainBlock("test.dat");

	int fps = 0, ff = 0;
	float lastframe = 0, thisframe = 0;
	bool running = true;
	SDL_Event event;
	while (running)
	{
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		glLoadIdentity();	
		
		tb->render();
		SDL_GL_SwapBuffers();
		
		while(SDL_PollEvent(&event))
		{
			switch(event.type)
			{
				case SDL_KEYDOWN:
					switch(event.key.keysym.sym)
					{
						case SDLK_q:
						case SDLK_ESCAPE:
							running = false;
						break;
					}
				break;
				case SDL_QUIT:
					running = false;
				break;
			}
		}

		thisframe = SDL_GetTicks();     
		ff++;
		if((thisframe - lastframe) > 1000)
		{
			fps = ff;
			ff = 0;
			lastframe = thisframe;
		}
	}
	
	delete tb;
	
	SDL_Quit();
	return 0;
}