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

void usage(char *av0)
{
	printf("Usage: %s action [-f filename] [-c count=20] [-move movment=20]\n", av0);
	printf("\taction: generate|gen create a new grid\n");
}


static int getInt(char *params, char *av0)
{
	int varNum;

	if (!params)
	{
		fprintf(stderr, "Expected number\n");
		usage(av0);
		return -1;
	}
	if ((varNum = atoi(params)) <= 0)
	{
		fprintf(stderr, "Invalid number\n");
		usage(av0);
		return -1;
	}
	return varNum;
}

int parse_params(char **params, t_params *p, char *av0)
{
	int varNum;
	p->count = 20;
	p->file = NULL;
	p->nbMovment = 20;

	for (int i=0; params[i]; ++i)
	{
		if (!strcmp(params[i], "-f"))
		{
			if (!params[i+1])
			{
				fprintf(stderr, "Error: expected filename\n");
				usage(av0);
				return 0;
			}
			p->file = strdup(params[i+1]);
			i++;
		}
		else if (!strcmp(params[i], "-c"))
		{
			if ((p->count = getInt(params[1+i], av0)) == -1)
				return -1;
			i++;
		}
		else if (!strcmp(params[i], "-move"))
		{
			if ((p->nbMovment = getInt(params[1+i], av0)) == -1)
				return -1;
			i++;
		}
		else
		{
			fprintf(stderr, "Invalid token: %s\n", params[i]);
			usage(av0);
			return -1;
		}
	}
	return 1;
}