#include "namesarchive.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define INDEX_NOT_FOUND -1

static char **names = NULL;
static unsigned int numberOfEntries = 0;

int addName(const char *name)
{
    char **oldPtr = names;
    names = realloc(names, sizeof(char*)*(numberOfEntries+1));

    if(names != NULL)
    {
        names[numberOfEntries] = malloc((strlen(name)+1) * sizeof(sizeof(char)));

        if(names[numberOfEntries] != NULL)
        {
            strcpy(names[numberOfEntries], name);
            numberOfEntries++;

            return 1;
        }
    }
    else
        names = oldPtr;

    return 0;
}

void printNames()
{
    for(int i = 0; i < numberOfEntries; i++)
    {
        printf("%s\n", names[i]);
    }
}

static int getNameIdx(const char *name)
{
    for(int i = 0; i < numberOfEntries; i++)
    {
        if(strcmp(name, names[i]) == 0)
            return i;
    }
    return INDEX_NOT_FOUND;
}

static void removeAt(int idx)
{
    for(int i = idx; i < numberOfEntries-1; i++)
    {
        free(names[i]);
        names[i] = names[i+1];
    }
    numberOfEntries--;
    names = realloc(names, numberOfEntries*sizeof(char*));
}

int removeName(const char *name)
{
    int idx = getNameIdx(name);

    if(idx == INDEX_NOT_FOUND)
    {
        return 0;
    }
    else
    {
        removeAt(idx);
        return 1;
    }
}

void clearArchive()
{
    for(int i = 0; i < numberOfEntries; i++)
    {
        free(names[i]);
        names[i] = NULL;
    }
    free(names);
    names = NULL;
    numberOfEntries = 0;
}