#include <stdint.h>

#include "console.h"

static int posx=0;
static int posy=0;

void print_nextline()
{
    int i,x;

    posx=0;
    posy++;

    if(posy>SCR_HEIGHT-2)
    {	
	for(i=1;i<SCR_HEIGHT-1;i++)
	{
	    
	    for(x=1;x<SCR_WIDTH;x++)
	    { 
		char* video_mem=(char *)SCR_VIDEOMEM+((x)+(i-1)*SCR_WIDTH)*2;
		char* video_mem2=(char *)SCR_VIDEOMEM+((x)+i*SCR_WIDTH)*2;

		*video_mem=*video_mem2;
	    }
	}

	posy--;
    }
}

void print_hex(uint16_t val)
{
    int i;

	print_char_col(posx,posy,'0',SCR_WHITE); 
	posx++;
	print_char_col(posx,posy,'x',SCR_WHITE); 
	posx++;

    for(i=0;i<4;i++)
    {
	print_single_hex((val&0xf000)>>12);
	val=val << 4;
	

    }

}


void print_string(char *str)
{

    while(*str!=0)
    {
	print_char(posx++,posy,*(str++));
    }
}

void console_clear_screen()
{
    int x,y;
    for(x=0;x<SCR_WIDTH;x++)
    for(y=0;y<SCR_WIDTH;y++)
    {
	print_char_col(x,y," ",SCR_BLACK);
	
    }
    posx=posy=0;

}





// helper_funcs

void print_single_hex(int i)
{
   if(i<10)print_char_col(posx,posy,'0'+i,SCR_GREEN); 
   else if(i<16)print_char_col(posx,posy,'A'+i-10,SCR_GREEN); 
   posx++;

}


void print_str(int x,int y,char *str)
{
    print_str_col(x,y,str,SCR_WHITE);
}

void print_char(int x, int y, char c)
{
    print_char_col(x,y,c,SCR_WHITE);
}

void print_str_col(int x,int y,char *str, char col)
{

    while(*str!=0)
    {
	print_char_col(x++,y,*(str++),col);
    }

}
    
void print_char_col(int x, int y, char c, char col)
{
    char* video_mem=(char *)SCR_VIDEOMEM+(x+y*SCR_WIDTH)*2;
    video_mem[0]=c;
    video_mem[1]=col;
}