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

#define ARR_LEN (1000)


// read file, dump into diagnostics and count bits, do part one stuff
// return answer for part one
int d3_part_one(int* diagnostics, size_t diag_len,
			int* bit_ct, size_t bit_ct_len);

// returns answer for part two
int d3_part_two(const int* const diagnostics, size_t diag_len,
				const int* const bit_ct, size_t bit_len,
				int power_consumption);

int main(int argc, char** argv)
{
	int diagnostic_arr[ARR_LEN];
	int bit_ct[12];

	memset(diagnostic_arr, 0, ARR_LEN * sizeof(int));
	memset(bit_ct, 0, 12 * sizeof(int));


	int power_consumption = d3_part_one(diagnostic_arr, ARR_LEN, bit_ct, 12);
	printf("(Part 1 Answer) Power Consumption: %d\n", power_consumption);


	return 0;
}


// returns status of init
int d3_part_one(int* diagnostics, size_t diag_len,
			int* bit_ct, size_t bit_ct_len)
{
	FILE* fp = fopen("input.txt", "r");
	if(!fp)
	{
		printf("Failed to open file for reading...\n");
		exit(-1);
	}
	char* line = NULL;
	size_t len = 0;
	for(int ind = 0; ind < ARR_LEN; ind++)
	{
		ssize_t rc = getline(&line, &len, fp);
		if(rc == -1)
		{
			printf("EXITING ABNORMALLY\n");
			exit(-1);
		}
		diagnostics[ind] = strtol(line, NULL, 2);
		for(int bit = 0; bit < bit_ct_len; bit++)
		{
			bit_ct[bit] += ((diagnostics[ind] & (1 << bit))>>bit);
		}
	}

	fclose(fp);

	int gamma = 0;
	int epsilon = 0;
	for(int bit = 0; bit < bit_ct_len; bit++)
	{
		gamma += ((bit_ct[bit] > (ARR_LEN >> 1))<<bit);
	}
	epsilon = (~gamma) & 0xFFF;
	return gamma * epsilon;
}

// returns answer for part two
// we can use the answer from part 1 to cut out a lot of unnecessary instructions
int d3_part_two(const int* const diagnostics, size_t diag_len,
				const int* const bit_ct, size_t bit_len,
				int power_consumption)
{
	int ans = 0;

	return ans;
}