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

void parse(const char* input) {
	// Goal: parse out a string between brackets
	// (e.g. "   [target string]" -> "target string")

	char *mutable_copy = strdup(input);
	int *key = malloc(sizeof(int));
	*key = input[0];

	// Find open bracket
	char *open_bracket = strchr(mutable_copy, '[');
	if (open_bracket == NULL) {
		printf("Malformed input!\n");
		free(mutable_copy);
		free(key);
		return;
	}

	// Make the output string start after the open bracket
	char *parsed = open_bracket + 1;

	// Make sure there is at least one character in brackets
	if (parsed[0] == '\0') {
		printf("There should be at least one character in brackets!\n");
		free(mutable_copy);
		free(key);
		return;
	}

	// Find the close bracket
	char *close_bracket = strchr(parsed, ']');
	if (close_bracket == NULL) {
		printf("Malformed input!\n");
		return;
	}

	// Replace the close bracket with a null terminator to end the parsed
	// string there
	*close_bracket = '\0';

	printf("Parsed string: %s (key: %d)\n", parsed, *key);
	free(mutable_copy);
	free(key);
}

int main(int argc, char *argv[]) {
	if (argc < 2) {
		printf("Usage: %s <string to parse>\n", argv[0]);
		return 1;
	}

	parse(argv[1]);

	return 0;
}