#include "CMDList.h"

#include <stdlib.h>
#include <string.h>

// initilises a CMDList_t with all NULL pointers
CMDList_t* CMDList_init()
{
	CMDList_t *list = malloc(sizeof(CMDList_t));
	memset(list, 0, sizeof(CMDList_t));
	return list;
}

// free up the full tree from memory
int CMDList_deinit(CMDList_t *list)
{
	CMDList_t* chars[26]; //TODO: cast list to array

	for (int i = 0; i < 26; i++)
	{
		if (chars[i] != NULL)
		{
			CMDList_deinit(chars[i]);
		}
	}

	free(list);
	return 0;
}

// add a command in the command tree
int CMDList_add(CMDList_t *list, CMD_t* cmd)
{
	char* read_p = cmd;
	CMDList_t* list_p = list;

	while (
		   (read_p != NULL)
		&& (*read_p != ' ') // space ends the command
		&& (*read_p != '\n') // end of line
		&& (*read_p != '\r') // end of line
		&& (*read_p != 0) // end of string
		&& (read_p - (char*)cmd < 500)
	)
	{
		char c = *read_p & (~0x20); // to uppercase
		if ((*read_p >= 'A') && (*read_p <= 'Z'))
		{
			read_p += (*read_p - 'A') * sizeof(CMDList_t*);
			if (*((CMDList_t**)read_p) == NULL)
			{
				read_p = malloc(sizeof(CMDList_t));
			}
			else
			{
				read_p = *((CMDList_t**)read_p);
			}
		}
	}
}

// search command in the tree
int CMDList_get(CMDList_t *list, char* cmd);