#include "History.h"
#include <string.h>
#include <unistd.h>
#include <stdio.h>

History::History()
{
    hist = {0};
    index = 0;
    r_index = 0;
}

History::~History()
{
    for (int i = 0; i < 20; i++)
	{
	    if (hist[i] != 0)
		{
		    delete[] (hist[i]);
		}
	}
}

void History::addEntry(char* str)
{
	if (hist[index] != NULL)
	{
	    delete[] (hist[index]);
	}

	hist[index] = new char[65];
	strcpy(hist[index], str);

	index = (index + 1) % 20;
}

void History::printEntry()
{
    printf( "%s", hist[r_index] );
	fflush(stdout);
}

void History::printAll()
{
    r_index = index;
	if (hist[0] == NULL)
	{
	}
    else if (hist[(index + 1) % 20] == NULL)
	{
	    r_index = 0;
	    while(r_index < index)
		{
		    printEntry();
			printf("%c", '\n');
			fflush(stdout);
			r_index++;
		}
	}
	else
	{
	    for(int i = 0; i < 20; i++)
		{
		    printEntry();
			r_index = (r_index - 1) % 20;
		}
	}
}