#include <common.h>
#include <cstdio>
#include <ctime>

#define TICKS_PER_SEC 20
#define MSEC_PER_TICK (1000/TICKS_PER_SEC)

SDL_Window    *window = NULL;
SDL_Surface   *renderSurface = NULL;
SDL_GLContext  mainGLContext = NULL;

bool gameRunning = true;

static unsigned int tickCount   = 0,
					prevTime    = 0,
					currentTime = 0,
					deltaTime   = 0;

Entity *entPlay;	//The player base
Entity *entnpc[10];	//The NPC base
Player player;		//The actual player object
NPC npc[10];
Structures build;
UIClass ui;			//Yep
World *currentWorld;//u-huh

void logic();
void render();

int main(int argc,char **argv){
    //runs start-up procedures
    if(!SDL_Init(SDL_INIT_VIDEO)){
    	atexit(SDL_Quit);
    	if(!(IMG_Init(IMG_INIT_PNG|IMG_INIT_JPG)&(IMG_INIT_PNG|IMG_INIT_JPG))){
			std::cout<<"Could not init image libraries!\n"<<std::endl;
			return -1;
		}
		atexit(IMG_Quit);
		//Turn on double Buffering
        SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
        //create the window
        window = SDL_CreateWindow("Independent Study v.0.1 alpha", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN | SDL_WINDOW_OPENGL
                                  #ifdef FULLSCREEN
                                  | SDL_WINDOW_FULLSCREEN
                                  #endif // FULLSCREEN
                                  );
        if(window){
        	//set OpenGL context
            mainGLContext = SDL_GL_CreateContext(window);
            if(mainGLContext == NULL){
            	std::cout << "The OpenGL context failed to initialize! Error: " << SDL_GetError() << std::endl;
            }
		}else{
			std::cout << "The window failed to generate! Error: " << SDL_GetError() << std::endl;
        	return -1;
        }
    }else{
		std::cout << "SDL was not able to initialize! Error: " << SDL_GetError() << std::endl;
		return -1;
	}

	glClearColor(.3,.5,.8,0);
	glEnable(GL_BLEND);
	glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
	
	/**************************
	****     GAMELOOP      ****
	**************************/

	irand(time(NULL));
	entPlay = &player;
	entPlay->spawn(0, 0);

	build.spawn(-1, (grand()%20)-10, 0);

	// Generate the world
	World *w=NULL,*w2=NULL;
	w2=new World(4,w,NULL);
	w=new World(10,NULL,w2);
	
	currentWorld=w;
	currentWorld->addLayer(3);
	//currentWorld->addEntity((void *)entnpc);

	float gw;
	
	
	while(gameRunning){
		prevTime = currentTime;
		currentTime = SDL_GetTicks();
		deltaTime = currentTime - prevTime;

		if(prevTime + MSEC_PER_TICK >= SDL_GetTicks()){						//the logic loop to run at a dedicated time
			logic();
			prevTime = SDL_GetTicks();
		}

		player.loc.x += (player.vel.x * player.speed) * deltaTime;						//update the player's x based on 
		player.loc.y += player.vel.y * deltaTime;
		

		gw=currentWorld->getWidth();
		if(player.loc.x+player.width>-1+gw){
			if(currentWorld->toRight){
				goWorldRight(currentWorld)
				player.loc.x=-1+HLINE;
			}else{
				player.loc.x=gw-1-player.width-HLINE;
			}
		}
		if(player.loc.x<-1){
			if(currentWorld->toLeft){
				goWorldLeft(currentWorld);
				player.loc.x=currentWorld->getWidth()-1-player.width-HLINE;
			}else{
				player.loc.x=-1+HLINE;
			}
		}

		render();
	}
	
	/**************************
	****  CLOSE PROGRAM    ****
	**************************/
	
    //closes the window and frees resources
    SDL_GL_DeleteContext(mainGLContext);
    SDL_DestroyWindow(window);
    return 0;
}

void render(){
														//a matrix is a blank canvas for the computer to draw on, the matrices are stored in a "stack"
														//GL_PROJECTION has 2 matrices
														//GL_MODELVIEW has 32 matrices
		glMatrixMode(GL_PROJECTION); 					//set the matrix mode as projection so we can set the ortho size and the camera settings later on
		glPushMatrix(); 								//push the  matrix to the top of the matrix stack
		glLoadIdentity(); 								//replace the entire matrix stack with the updated GL_PROJECTION mode
		//set the the size of the screen
		if(player.loc.x-1<-1){
			glOrtho(-1,1,-1,1,-1,1);
		}else if(player.loc.x+1>-1+currentWorld->getWidth()){
			glOrtho(-3+currentWorld->getWidth(),-1+currentWorld->getWidth(),-1,1,-1,1);
		}else{
			glOrtho(-1 + player.loc.x, 1 + player.loc.x , -1, 1, -1,1);
		}
		glMatrixMode(GL_MODELVIEW); 					//set the matrix to modelview so we can draw objects
		glPushMatrix(); 								//push the  matrix to the top of the matrix stack
		glLoadIdentity(); 								//replace the entire matrix stack with the updated GL_MODELVIEW mode
		glPushMatrix();									//basically here we put a blank canvas (new matrix) on the screen to draw on
		glClear(GL_COLOR_BUFFER_BIT); 					//clear the matrix on the top of the stack

		/**************************
		**** RENDER STUFF HERE ****
		**************************/
		 
		currentWorld->draw(); // layers dont scale x correctly...
		glColor3ub(120,30,30);							//render the player
		glRectf(player.loc.x, player.loc.y, player.loc.x + player.width, player.loc.y + player.height);

		///TEMP NPC RENDER!!!!!!
		for(int i = 0; i < 10; i++){
			npc[i].loc.y += npc[i].vel.y*deltaTime;

			glColor3ub(98, 78, 44);							//render the NPC(s)
			glRectf(npc[i].loc.x, npc[i].loc.y, npc[i].loc.x + npc[i].width, npc[i].loc.y + npc[i].height);
			glEnd();
	    }
	    glColor3ub(255,0,0);
		glRectf(build.loc.x, build.loc.y, build.loc.x + build.width, build.loc.y + build.height);
		///BWAHHHHHHHHHHHH
		
		/**************************
		****  CLOSE THE LOOP   ****
		**************************/

		glPopMatrix(); 									//take the matrix(s) off the stack to pass them to the renderer
		SDL_GL_SwapWindow(window); 						//give the stack to SDL to render it
}

void logic(){
	ui.handleEvents();								// Handle events

	if(player.right == true) {player.vel.x = .00075;}
	if(player.left == true) {player.vel.x = -.00075;}
	if(player.right == false && player.left == false) {player.vel.x = 0;}

	std::cout<<"\r("<<player.loc.x<<","<<player.loc.y<<")"<<std::endl;


	currentWorld->detect(&player.loc,&player.vel,player.width);

	currentWorld->detect(&build.loc,&build.vel,build.width);
	for(int i = 0; i < 10; i++){
		currentWorld->detect(&npc[i].loc,&npc[i].vel,npc[i].width);
	}

	tickCount++;
}