#include "kernel.h"
#include "interrupts.h"

#define COMMAND_LENGTH 255

static char command[COMMAND_LENGTH];
static int pos=0;

// in timer:
uint16_t timer16;

void shell_init()
{
    pos=0;
    command[0]=0;

    scr_nextline();
    scr_put_string_nl("***********************");
    scr_put_string_nl("Fools Shell v 0.0.0.1 *");
    scr_put_string_nl("***********************");
    scr_nextline();
    scr_put_string("Command> ");
}

void shell_put(char x)
{
    if(pos<COMMAND_LENGTH-2);

    command[pos]=x;
    pos++;

    command[pos]=0;
    
}

void shell_backspace()
{
    if(pos>0);
    pos--;
    command[pos]=0;

}


int strcmp(char *b1, char *b2)
{
    int i=0;
    while(b1[i]==b2[i]&&b1[i]!=0&&b2[i]!=0) i++;	

    if(b1[i]==0&&b2[i]==0)return 1;

    return 0;
}

// TODO: EXECUTE LATER not inside INTERRUPT !!!

void shell_execute()
{
    scr_nextline();
    scr_put_string("  processing command: ");
    scr_put_string_nl(command);

    if(1==strcmp(command,"TIME"))
    {
	scr_put_string_nl("  getting sys time from kernel");
	scr_put_string("  ");
	scr_put_hex(timer16);
	scr_put_string_nl("  seconds passed since system start.");
    }
    else if(1==strcmp(command,"INT"))
    {
	scr_put_string_nl("  getting count of unhandeled interrupts");
	scr_put_string("  ");
	scr_put_hex(int_unhandled);
    }
    else
    {
	scr_put_string_nl("  unsupported command, sorry!");
    }
    
    pos=0;

    scr_nextline();
    scr_put_string("Command> ");

}