/*-----------------

Very simple RTC example with a cheesy watch face

\*----------------*/

#include<nds.h> 

#include <stdio.h>
#include <time.h>

const char* months[12] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};

//draw a watch hands
void DrawQuad(float x, float y, float width, float height) 
{ 

	glBegin(GL_QUADS); 
	glVertex3f(x - width / 2, y, 0); 
	glVertex3f(x + width / 2, y, 0); 
	glVertex3f(x  + width / 2, y  + height, 0); 
	glVertex3f(x - width / 2, y  + height, 0); 
	glEnd(); 
} 

int main() 
{    
	int hours, seconds, minutes; 

	//put 3D on top 
	lcdMainOnTop(); 

	// Setup the Main screen for 3D 
	videoSetMode(MODE_0_3D); 

	// Reset the screen and setup the view 
	glInit();

	// Set our viewport to be the same size as the screen 
	glViewport(0,0,255,191); 

	// Specify the Clear Color and Depth 
	glClearColor(0,0,0,31); 
	glClearDepth(0x7FFF); 

	consoleDemoInit();
	
 
	
	
	//ds specific, several attributes can be set here    
	glPolyFmt(POLY_ALPHA(31) | POLY_CULL_NONE); 
	
	// Set the current matrix to be the model matrix 
	glMatrixMode(GL_MODELVIEW); 
	glLoadIdentity(); 
	
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	gluPerspective(70, 256.0 / 192.0, 0.1, 100);
	gluLookAt(	0.0, 0.0, 3.0,		//camera possition 
				0.0, 0.0, 0.0,		//look at
				0.0, 1.0, 0.0);		//up
	
	while (1) 
	{ 

		time_t unixTime = time(NULL);
		struct tm* timeStruct = gmtime((const time_t *)&unixTime);
		
		hours = timeStruct->tm_hour;
		minutes = timeStruct->tm_min;
		seconds = timeStruct->tm_sec;
		
		//Push our original Matrix onto the stack (save state) 
		glPushMatrix();    

		//draw second hand 
		glColor3f(0,0,1); 
		glRotateZ(-seconds * 360 / 60); 
		glTranslatef(0,1.9,0); 
		DrawQuad(0,0,.2,.2); 

		// Pop our Matrix from the stack (restore state) 
		glPopMatrix(1); 

		//Push our original Matrix onto the stack (save state) 
		glPushMatrix();    

		//draw minute hand 
		glColor3f(0,1,0); 
		glRotateZ(-minutes * 360 / 60); 
		DrawQuad(0,0,.2,2); 

		// Pop our Matrix from the stack (restore state) 
		glPopMatrix(1); 

		//Push our original Matrix onto the stack (save state) 
		glPushMatrix();    

		//draw hourhand 
		glColor3f(1,0,0); 
		glRotateZ(-hours * 360 / 12); 
		DrawQuad(0,0,.3,1.8); 

		// Pop our Matrix from the stack (restore state) 
		glPopMatrix(1);

		printf("\x1b[2J%02i:%02i:%02i", hours, minutes, seconds);
		printf("\n%s %i %i", months[timeStruct->tm_mon], timeStruct->tm_mday, timeStruct->tm_year +1900);
		
		// flush to screen    
		glFlush(0);
		
		swiWaitForVBlank();
	} 

	return 0; 
}