#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>

int dial_translate(int pos, int offset) {
	int final = pos + offset;
	int fpos = final;
	if (final < 0) {fpos = 100 + final;}
	if (final >= 100) {fpos = final - 100;}
	return fpos % 100;
}

int main() {
	int pos = 50;
	int count = 0;
	int fd = open("./day1.input", O_RDONLY);
	struct stat stat;
	fstat(fd, &stat);
	char charbuf[stat.st_size];
	read(fd, charbuf, stat.st_size);
	printf("Size: %d\n", stat.st_size);
	int p;
	for (p = 0; p < (sizeof(charbuf) - sizeof(char)); p++) {
		char cur = charbuf[p];
		int direction;
		if (cur == 'L') {direction = -1;}
		else if (cur == 'R') {direction = 1;}
		p++;
		int i = 0;
		char numline[100] = {0};
		while (charbuf[p] != '\n') {
			numline[i] = charbuf[p];
			i++;
			p++;
		}
		int offset = atoi(numline) * direction;
		printf("Offset: %d\n", offset);
		pos = dial_translate(pos, offset);
		if (pos == 0) { count++; }
		printf("Dial at: %d\n", pos);
	}
	printf("Password: %d\n", count);
	return 0;
}