//A console clock.

#include<iostream>
#include<ctime>
#include<windows.h>
using namespace std;

int display_mask[10][7]= { {1,1,1,0,1,1,1},
				     {0,0,1,0,0,1,0},
				     {1,0,1,1,1,0,1},
				     {1,0,1,1,0,1,1},
				     {0,1,1,1,0,1,0},
				     {1,1,0,1,0,1,1},
				     {1,1,0,1,1,1,1},
				     {1,0,1,0,0,1,0},
				     {1,1,1,1,1,1,1},
				     {1,1,1,1,0,1,1}
				  };	
#define SCROLL_POS   24  // the point that scrolling occurs
CONSOLE_SCREEN_BUFFER_INFO con_info;   // holds screen info
HANDLE hconsole;			           // handle to console


void seg_hor(int size, int state);
void seg_ver(int state);
void draw_display(char number[7], int size);

void Init_Graphics(void);
inline void Set_Color(int fcolor, int bcolor);
inline void Clear_Screen(void);

int main()
{
	Init_Graphics();
	
	while(1)
	{
		Clear_Screen();

        char *time_str, time_digits[7];
		
		time_t t;
		time(&t);
		time_str = ctime(&t);
	
		time_digits[0]=time_str[11];
		time_digits[1]=time_str[12];
		time_digits[2]=time_str[14];
		time_digits[3]=time_str[15];
		time_digits[4]=time_str[17];
		time_digits[5]=time_str[18];
		time_digits[6]=0;

		draw_display(time_digits, 3);

		Sleep(40);
	}

	return 0;
}

void seg_hor(int size, int state)
{
	for(int i=0; i<size; i++)
	{
		if(state==0)
			cout<<" ";
		else
			cout<<"-";
	}
}

void seg_ver(int state)
{
	if(state==0)
		cout<<" ";
	else
		cout<<"|";
}

void draw_display(char number[7], unsigned int size)
{
		//7seg draw_display maps to 2*size + 3 rows in the console
		for(unsigned int i=0; i<(2*size+3); i++)
		{
			for(unsigned int j=0; j<=6; j++)
			{
				if(i==0)
				{
					//draw seg0
					cout<<" ";
					seg_hor(size,display_mask[number[j]-'0'][0]);
					cout<<" ";
				}
				if(i>0 && i<(size+1))
				{
					//draw seg1 and seg2
					seg_ver(display_mask[number[j]-'0'][1]);
					for(unsigned int k=0; k<(size);k++)
						cout<<" ";
					seg_ver(display_mask[number[j]-'0'][2]);
					
				}
				if(i==(size+1))
				{
					//draw seg3
					cout<<" ";
					seg_hor(size,display_mask[number[j]-'0'][3]);
					cout<<" ";
				}
				if(i>(size+1) && i<(2*size+2))
				{
					//draw seg4 and seg5
					seg_ver(display_mask[number[j]-'0'][4]);
					for(unsigned int k=0; k<(size);k++)
						cout<<" ";
					seg_ver(display_mask[number[j]-'0'][5]);
				}
				if(i==(2*size+2))
				{
					//draw seg6
					cout<<" ";
					seg_hor(size,display_mask[number[j]-'0'][6]);
					cout<<" ";
				}
				//space out the hr, min and sec displays
				if(j==1 || j==3)
					cout<<"     ";
			}
			cout<<endl;
		}
}

void Init_Graphics(void)
{
	COORD console_size = {80,25}; // size of console

	srand((unsigned)time(NULL));

	// open i/o channel to console screen
	hconsole=CreateFile("CONOUT$",GENERIC_WRITE | GENERIC_READ,
         FILE_SHARE_READ | FILE_SHARE_WRITE,
         0L, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0L);

	// make sure we are in 80x25
	SetConsoleScreenBufferSize(hconsole,console_size);

	// get details for console screen                       
	GetConsoleScreenBufferInfo(hconsole,&con_info);
}

inline void Set_Color(int fcolor, int bcolor=0) 
{
	// this function sets the color of the console output
	SetConsoleTextAttribute(hconsole,(WORD)((bcolor << 4) | 
		                    fcolor));
}

inline void Clear_Screen(void)
{
	// set color to white on black
	Set_Color(15,0);

	// clear the screen
	for (int index=0; index<=25; index++)
	{
		COORD cursor_pos;
		cursor_pos.X = 0;
		cursor_pos.Y = SCROLL_POS;
		SetConsoleCursorPosition(hconsole,cursor_pos);
		cout<<endl;
	}
}

void draw_display(char number[7], int size);  // Prototype sig.
//...
void draw_display(char number[7], unsigned int size)  // Definition sig.