#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>

#define STRBUF_SIZE 200

enum color
{
    color_red = 0,
    color_green,
    color_blue
};

typedef struct gameresult_t
{
    uint8_t red;
    uint8_t green;
    uint8_t blue;
} gameresult;

gameresult parse_hand(char *str)
{
    gameresult result = {0};
    uint8_t num = 0;

    while (true)
    {
        num = 0;
        while (*str != ' ')
        {
            num = (num * 10) + (*str - '0');
            str++;
        }

        str++;

        switch(*str)
        {
            case 'r':
                result.red += num;
                str += 3;
                break;
            case 'g':
                result.green += num;
                str += 5;
                break;
            case 'b':
                result.blue += num;
                str += 4;
                break;
        }

        if (*str != ',') return result;

        str += 2;
    }
}

gameresult parse_game_maxes(char *str)
{
    // Keeps track of the most cubes of a single color seen any hand
    gameresult maxes = {0};

    // Keeps result from the most recent hand
    gameresult result = {0};

    while (*str != ':') str++;
    
    while (*str == ':' || *str == ';')
    {
        str += 2;
        result = parse_hand(str);
        if (result.red > maxes.red) maxes.red = result.red;
        if (result.green > maxes.green) maxes.green = result.green;
        if (result.blue > maxes.blue) maxes.blue = result.blue;
        while (*str != ';' && *str != '\n') str++;
    }

    return maxes;
}

bool game_is_valid(char *str)
{
    gameresult maxes = {0};

    maxes = parse_game_maxes(str);

    return (maxes.red <= 12 && maxes.green <= 13 && maxes.blue <= 14);
}

int main(int argc, char **argv)
{
    // Get filename as an argument, defaults to "input.txt"
    char *path = (argc > 1) ? argv[1] : "input.txt";

    if (!path)
    {
        printf("Requires input file.\n");
        return 1;
    }

    FILE *file = fopen(path, "r");

    if (!file)
    {
        printf("Could not find file.");
        return 1;
    }

    char strbuf[STRBUF_SIZE] = {0};
    gameresult maxes = {0};
    uint8_t gamenum = 1;
    uint32_t power = 0;
    uint32_t sum = 0;

    while (fgets(strbuf, 200, file))
    {
        maxes = parse_game_maxes(strbuf);
        power = maxes.red  * maxes.green * maxes.blue;
        sum += power;
    }

    printf("Sum: %d\n", sum);

    return 0;
}