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#include "maze.h"
#include "utils.h"
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
void validate_number_optarg(char *optarg, int c)
{
unsigned int is_invalid = 0;
size_t error_length = 40;
char *error = malloc(error_length + 1);
if (!is_number(optarg))
{
is_invalid = 1;
snprintf(error, error_length, "It must be a number");
}
else if (atoi(optarg) < 1)
{
is_invalid = 1;
snprintf(error, error_length, "It must be greater than 0");
}
if (is_invalid == 1)
{
printf("Error: Invalid option argument for -%c. %s\n", c, error);
free(error);
exit(1);
}
free(error);
}
void validate_start_coords(int start_x, int start_y, int width, int height)
{
char *error_format =
"Error: The %s start coordinate is not allowed to be higher than the maze's %s\n";
if (start_x > width)
{
printf(error_format, "x", "width");
exit(1);
}
if (start_y > height)
{
printf(error_format, "y", "height");
exit(1);
}
}
void get_seed(int *seed_dst)
{
FILE *urandom = fopen("/dev/urandom", "r");
fread(seed_dst, sizeof(*seed_dst), 1, urandom);
fclose(urandom);
}
const struct option options[] = {{"width", required_argument, NULL, 'w'},
{"heigth", required_argument, NULL, 'h'},
{"wall", required_argument, NULL, 'W'},
{"seed", required_argument, NULL, 's'},
{"start-x", required_argument, NULL, 'x'},
{"start-y", required_argument, NULL, 'y'},
{"help", no_argument, NULL, 0},
{NULL, 0, NULL, 0}};
int main(int argc, char *argv[])
{
int maze_width = 40;
int maze_height = 20;
int start_x = 0;
int start_y = 0;
char *wall = "█";
int seed = -1;
int c;
while ((c = getopt_long(argc, argv, "w:h:W:s:x:y:", options, NULL)) != -1)
{
switch (c)
{
case 'w':
validate_number_optarg(optarg, c);
maze_width = atoi(optarg);
break;
case 'h':
validate_number_optarg(optarg, c);
maze_height = atoi(optarg);
break;
case 'x':
validate_number_optarg(optarg, c);
start_x = atoi(optarg);
break;
case 'y':
validate_number_optarg(optarg, c);
start_y = atoi(optarg);
break;
case 'W':
wall = optarg;
break;
case 's':
validate_number_optarg(optarg, c);
seed = atoi(optarg);
break;
case 0:
printf("Usage: %s [OPTION]...\n\n"
"Options:\n"
" -w, --width WIDTH The width of the maze (Default: 40)\n"
" -h, --heigth HEIGHT The heigth of the maze (Default: 20)\n"
" -x, --start-x X The x coordinate for the start position "
"(Default: 0)\n"
" -y, --start-y Y The y coordinate for the start position "
"(Default: 0)\n"
" -W, --wall WALL Single character used as maze walls "
"(Default: '█')\n"
" -s, --seed SEED The randomization seed used for maze "
"generation (Any number)\n"
" --help Displays usage information\n",
argv[0]);
exit(0);
case '?':
printf("\nTry '%s --help' for more information\n", argv[0]);
exit(1);
}
}
validate_start_coords(start_x, start_y, maze_width, maze_height);
if (seed == -1)
{
get_seed(&seed);
}
srand(seed);
Dimensions dimens = {.width = maze_width, .height = maze_height};
Maze maze = maze_create(dimens, wall);
Position start_pos = {.x = start_x, .y = start_y};
maze_excavate(&maze, start_pos);
maze_print(maze);
maze_destroy(&maze);
}
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