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

#define MAX 65535


void m2e(char[], int);
void e2m(char[], int);

int main(){

    unsigned char string[MAX];
    unsigned char c, d;
    int i;

    printf("EMC(English Morse Converter.) By 3issam\n\t-Send 1 for English to Morse\n\t-Send 2 for Morse to English\n\t-Send h for help\n\t-Send e to quit\n\n");

    for(c = 0; c != EOF;){
        printf("~\\");
        c = getchar();
        switch(c){
            case '1':
                getchar();
                printf("\nEnter the English text:\n\n-->");
                for(d = i = 0; (d = getchar()) != EOF && d != '\n' && i < MAX; i++)
                    string[i] = d;
                string[i] = 0;
                printf("==>"); e2m(string, i); putchar('\n');
                break;
            case '2':
                getchar();
                printf("\nEnter the Morse text:\n\n-->");
                for(d = i = 0; (d = getchar()) != EOF && d != '\n' && i < MAX; i++)
                    string[i] = d;
                string[i] = 0;
                printf("==>"); m2e(string, i); putchar('\n');
                break;
            case 'h':
                getchar();
                printf("\nThis is a simple program to convert morse code into english and vise versa.\n");
                printf("\n\tFor english to morse the program isn't case sensitive.");
                printf("\n\tFor morse to english, words must be entered like this:\n");
                printf("\t\t.... . .-.. .-.. --- / .-- --- .-. .-.. -.. \n");
                printf("\t\t|___________________|^|____________________|\n");
                printf("\t\t        word         |          word        \n");
                printf("\t\t           space                    \n\n");
                printf("With dash(-) for long beep and period(.) for small beep.\n\nHope it helps.\n\n");
                break;
            case 'e':
                return 0;
                break;
            case '\0':
            case '\n':
                break;
            default:
                printf("Unknown input, try again.\n");
                c = 1;
                break;
        }
    }

}

void e2m(char string[], int i){
    for(i = 0; string[i] != 0; i++){    //pretty simple here: take letter and see what it is.
        switch(string[i]){
            case 'a':
            case 'A':
                printf(".- ");
                break;
            case 'b':
            case 'B':
                printf("-... ");
                break;
            case 'c':
            case 'C':
                printf("-.-. ");
                break;
            case 'd':
            case 'D':
                printf("-.. ");
                break;
            case 'e':
            case 'E':
                printf(". ");
                break;
            case 'f':
            case 'F':
                printf("..-. ");
                break;
            case 'g':
            case 'G':
                printf("--. ");
                break;
            case 'h':
            case 'H':
                printf(".... ");
                break;
            case 'i':
            case 'I':
                printf(".. ");
                break;
            case 'j':
            case 'J':
                printf(".--- ");
                break;
            case 'k':
            case 'K':
                printf("-.- ");
                break;
            case 'l':
            case 'L':
                printf(".-.. ");
                break;
            case 'm':
            case 'M':
                printf("-- ");
                break;
            case 'n':
            case 'N':
                printf("-. ");
                break;
            case 'o':
            case 'O':
                printf("--- ");
                break;
            case 'p':
            case 'P':
                printf(".--. ");
                break;
            case 'q':
            case 'Q':
                printf("--.- ");
                break;
            case 'r':
            case 'R':
                printf(".-. ");
                break;
            case 's':
            case 'S':
                printf("... ");
                break;
            case 't':
            case 'T':
                printf("- ");
                break;
            case 'u':
            case 'U':
                printf("..- ");
                break;
            case 'v':
            case 'V':
                printf("...- ");
                break;
            case 'w':
            case 'W':
                printf(".-- ");
                break;
            case 'x':
            case 'X':
                printf("-..- ");
                break;
            case 'y':
            case 'Y':
                printf("-.-- ");
                break;
            case 'z':
            case 'Z':
                printf("--.. ");
                break;
            case ' ':
                printf("/ ");
                break;
            case '-':
            case '.':
                printf("\nError: Morse code character detected, please note that dash(-) and period(.) are morse letters and invalid in this mode\n");
                break;
            default:
                printf("UNKNOWN: %c ---> ?\n", string[i]);
        }
    }

    return;
}


void m2e(char string[], int string_size){
    unsigned char morse_letter[MAX]; //this was supposed to only be 4 chars long, but it gave me a stack smahing error when executed, so I messed with it until
                     //I made it the same size as string[], not sure why tho...

    int i, j;

    for(i = 0; string[i] != '\0' ;){        //from here to the first "i++" should copy all characters from string[] to      morse_letter[] until the char
        for(j = 0; string[i] != ' '; j++)   //copied is a space(' ').
            morse_letter[j] = string[i++];
        morse_letter[j] = '\0';
        i++;

        if(!strcmp(morse_letter, ".-"))     //I wish there was a switch for strings.
            putchar('a');
        else if(!strcmp(morse_letter, "-..."))
            putchar('b');
        else if(!strcmp(morse_letter, "-.-."))
            putchar('c');
        else if(!strcmp(morse_letter, "-.."))
            putchar('d');
        else if(!strcmp(morse_letter, "."))
            putchar('e');
        else if(!strcmp(morse_letter, "..-."))
            putchar('f');
        else if(!strcmp(morse_letter, "--."))
            putchar('g');
        else if(!strcmp(morse_letter, "...."))
            putchar('h');
        else if(!strcmp(morse_letter, ".."))
            putchar('i');
        else if(!strcmp(morse_letter, ".---"))
            putchar('j');
        else if(!strcmp(morse_letter, "-.-"))
            putchar('k');
        else if(!strcmp(morse_letter, ".-.."))
            putchar('l');
        else if(!strcmp(morse_letter, "--"))
            putchar('m');
        else if(!strcmp(morse_letter, "-."))
            putchar('n');
        else if(!strcmp(morse_letter, "---"))
            putchar('o');
        else if(!strcmp(morse_letter, ".--."))
            putchar('p');
        else if(!strcmp(morse_letter, "--.-"))
            putchar('q');
        else if(!strcmp(morse_letter, ".-."))
            putchar('r');
        else if(!strcmp(morse_letter, "..."))
            putchar('s');
        else if(!strcmp(morse_letter, "-"))
            putchar('t');
        else if(!strcmp(morse_letter, "..-"))
            putchar('u');
        else if(!strcmp(morse_letter, "...-"))
            putchar('v');
        else if(!strcmp(morse_letter, ".--"))
            putchar('w');
        else if(!strcmp(morse_letter, "-..-"))
            putchar('x');
        else if(!strcmp(morse_letter, "-.--"))
            putchar('y');
        else if(!strcmp(morse_letter, "--.."))
            putchar('z');
        else if(!strcmp(morse_letter, "/"))
            putchar(' ');
        else;
    }
    return;
}