mastermind.c

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include <string.h>
#include <ctype.h>

#define RESET  "\x1B[0m"
#define BLOCK  "█"

#define RED_C   "\x1B[31m"
#define GRN_C   "\x1B[32m"
#define YEL_C   "\x1B[33m"
#define BLU_C   "\x1B[34m"
#define MAG_C   "\x1B[35m"
#define CYN_C   "\x1B[36m"
#define WHT_C   "\x1B[37m"

#define RED   RED_C BLOCK RESET
#define GRN   GRN_C BLOCK RESET
#define YEL   YEL_C BLOCK RESET
#define BLU   BLU_C BLOCK RESET
#define MAG   MAG_C BLOCK RESET
#define CYN   CYN_C BLOCK RESET
#define WHT   WHT_C BLOCK RESET

#define LENGTH 4

enum Color {
    red,
    green,
    yellow,
    blue,
    magenta,
    cyan,
    white,
    COLORS
};


void generate_colors(enum Color *buffer)
{
    int power = pow(COLORS, LENGTH);
    int colors_integer = rand() % power;

    for (int i = 0; i < LENGTH; ++i)
    {
        int remainder = colors_integer % (COLORS);
        int divisor = colors_integer / (COLORS);

        buffer[i] = (enum Color)remainder;

        colors_integer = divisor;
    }
}

int convert_input(char *input, enum Color *buffer)
{
    for (int c = 0; c < strlen(input); ++c)
    {
        char character = tolower(input[c]);

        switch (character)
        {
            case 'r':
                buffer[c] = red;
                break;

            case 'g':
                buffer[c] = green;
                break;

            case 'y':
                buffer[c] = yellow;
                break;

            case 'b':
                buffer[c] = blue;
                break;

            case 'm':
                buffer[c] = magenta;
                break;

            case 'c':
                buffer[c] = cyan;
                break;

            case 'w':
                buffer[c] = white;
                break;

            default:
                return 1;
        }
    }

    return 0;
}

const char *color_to_char(enum Color color)
{
    switch (color)
    {
        case red:
            return RED;
        case green:
            return GRN;
        case yellow:
            return YEL;
        case blue:
            return BLU;
        case magenta:
            return MAG;
        case cyan:
            return CYN;
        default:
            return WHT;
    }
}

int main()
{
    srand(time(NULL));

    enum Color selected_colors[4];
    generate_colors(selected_colors);

    char* line = NULL;
    size_t line_len = 0u;

    while (getline(&line, &line_len, stdin) != -1)
    {
        char input[LENGTH + 1];
        sscanf(line, "%4s", input);

        if (strlen(input) == LENGTH)
        {
            enum Color converted[LENGTH];
            int contains_unmatched = convert_input(input, converted);

            int correct_place = 0;
            int correct_color = 0;

            if (contains_unmatched)
            {
                printf("Please only choose characters from " RED_C "R, " GRN_C "G, " YEL_C "Y, " BLU_C "B, " MAG_C "M, " CYN_C "C, " WHT_C "W" RESET ".\n");
            }
            else
            {
                printf("You guessed: ");

                for (int i = 0; i < LENGTH; ++i)
                {
                    enum Color color = converted[i];
                    enum Color actual = selected_colors[i];

                    if (color == actual)
                        ++correct_place;

                    else 
                    {
                        for (int j = 0; j < LENGTH; ++j)
                        {
                            if (j != i)
                            {
                                enum Color current = selected_colors[j];

                                if (color == current)
                                {
                                    ++correct_color;
                                    break;
                                }
                            }
                        }
                    }

                    printf("%s", color_to_char(converted[i]));
                }

                if (correct_place == LENGTH)
                {
                    printf("Well done! You got it right. Goodbye\n");
                    return 0;
                }
                else
                {
                    printf("\n %d correct color\n %d correct place and color\n", correct_color, correct_place);
                }
            }
        }
        else
        {
            printf("Please enter 4 characters.\n");
        }
    }

    return 0;
}