#include "include/challenges.h"

char genChallenge(FILE * stream, char ** output, challenge_t challenge) {
    printf("------------- DESAFIO -------------\n");
    printf("%s\n\n", challenge.message);

    if (challenge.function != NULL)
        challenge.function();

    printf("\n----- PREGUNTA PARA INVESTIGAR -----\n");
    printf("%s\n\n", challenge.question);
    
    size_t linecap = 0;
    ssize_t linelen;

    if ((linelen = getline(output, &linecap, stream)) < 0)
        printSystemError("Challenges: getline()");

    return !strcmp(*output, challenge.flag);
}

void writeChallenge() {
    if (write(0xd, "................................La respuesta es fk3wfLCm3QvS\n", 61) < 0)
        perror("write");
}

void filterChallenge() {
    char * ans = "La respuesta es K5n2UFfpFMUN\n";
    int i = 0;
    while (ans[i] != '\0') {
        int fdRandom = (rand() % (UPPER - LOWER + 1)) + LOWER;
        if (fdRandom == STDOUT_FILENO) {
            if (write(STDOUT_FILENO, ans + i++, 1) < 0)
                printSystemError("Challenges: write()");
        }
        else {
            for (int i = (rand() % (6)) + 1; i > 0; i--) {
                int randNum = 90 * (rand() / (RAND_MAX + 1.0));
                char randLetter = (char) (randNum + '#');
                if (write(STDERR_FILENO, &randLetter, 1) < 0)
                    printSystemError("Challenges: write()");
            }
        }
    }
}

void questionChallenge() {
    if (write(STDOUT_FILENO, "\33[30;40m", 8) < 0)
        printSystemError("Challenges: write()");
    if (write(STDOUT_FILENO, "La respuesta es BUmyYq5XxXGt", 28) < 0)
        printSystemError("Challenges: write()");
    if (write(STDOUT_FILENO, "\33[0m\n", 5) < 0)
        printSystemError("Challenges: write()");
}

void quineChallenge() {
    int outputGCC = system("gcc quine.c -o quine");
    if (outputGCC < 0)
        printSystemError("Challenges: system()");

    if (outputGCC == 0) {
        printf("¡Genial!, ya lograron meter un programa en quine.c, veamos si hace lo que corresponde.\n");
        int outputDIFF = system("./quine | diff quine.c -");
        if (outputDIFF < 0)
            printSystemError("Challenges: system()");

        if (outputDIFF == 0)
            printf("La respuesta es chin_chu_lan_cha\n");
        else
            printf("\ndiff encontró diferencias.\n");
    }
    else
        printf("\nENTER para reintentar.\n");
}

void gdbme(char * output) {
    if (getpid() == 0x12345678) {
        *output = 1;
        return;
    }
    else *output = 0;
}

void gdbChallenge() {
    char gdbOutput;
    gdbme(&gdbOutput);

    if (gdbOutput)
        printf("La respuesta es gdb_rules\n");
    else
        printf("ENTER para reintentar.\n");
}