#include <SD.h>

// Digital pin led is connected to
// The constant LED_BUILTIN may be used instead of 5 to use the built-in LED on R3actor
int morseLED = 5;

// Base delay value in milliseconds
int d = 100; 

char character;
String letter;

File sdFile;

void setup() {

   pinMode(morseLED, OUTPUT);

   Serial.begin(9600);
   while (!Serial) {;}
   Serial.print("Initializing SD card...");
   if (!SD.begin(SDCARD_SS_PIN)) { // SDCARD_SS_PIN is the defined pin for the SD Card reader
      Serial.println("Initialization failed.");
      while (1);
   }

   Serial.println("Initialization done.");
   sdFile = SD.open("morse.txt", FILE_READ);

   if (sdFile) {

      Serial.println("File Opened");
      while (sdFile.available()) {

      character = sdFile.read();  // Read the next character from the text file
      letter = String(character); // convert that character into a string
      letter.toLowerCase();       // convert the string to lower case
      Serial.print(letter);       // print the letter to the monitor
      translateCode(letter);      // pass the letter into the translation function

      }

      sdFile.close();
      Serial.println("File Closed");

   } else {
      Serial.println("error opeining TextToTranslate.txt");
   }

}



// Morse Code Translation Functions
void translateCode(String input) {
   if (input == "a") A();
   if (input == "b") B();
   if (input == "c") C();
   if (input == "d") D();
   if (input == "e") E();
   if (input == "f") f();
   if (input == "g") G();
   if (input == "h") H();
   if (input == "i") I();
   if (input == "j") J();
   if (input == "k") K();
   if (input == "l") L();
   if (input == "m") M();
   if (input == "n") N();
   if (input == "o") O();
   if (input == "p") P();
   if (input == "q") Q();
   if (input == "r") R();
   if (input == "s") S();
   if (input == "t") T();
   if (input == "u") U();
   if (input == "v") V();
   if (input == "w") W();
   if (input == "x") X();
   if (input == "y") Y();
   if (input == "z") Z();
   if (input == " ") wordDelay();

   if (input == "0") zero();
   if (input == "1") one();
   if (input == "2") two();
   if (input == "3") three();
   if (input == "4") four();
   if (input == "5") five();
   if (input == "6") six();
   if (input == "7") seven();
   if (input == "8") eight();
   if (input == "9") nine();

}

// Morse Code Key: Letters
void A(){ dot();  dash();                 letterDelay(); }
void B(){ dash(); dot();  dot();  dot();  letterDelay(); }
void C(){ dash(); dot();  dash(); dot();  letterDelay(); }
void D(){ dash(); dot();  dot();          letterDelay(); }
void E(){ dot();                          letterDelay(); }
void f(){ dot();  dot();  dash(); dot();  letterDelay(); }
void G(){ dash(); dash(); dot();          letterDelay(); }
void H(){ dot();  dot();  dot();  dot();  letterDelay(); }
void I(){ dot();  dot();                  letterDelay(); }
void J(){ dot();  dash(); dash(); dash(); letterDelay(); }
void K(){ dash(); dot();  dash();         letterDelay(); }
void L(){ dot();  dash(); dot();  dot();  letterDelay(); }
void M(){ dash(); dash();                 letterDelay(); }
void N(){ dash(); dot();                  letterDelay(); }
void O(){ dash(); dash(); dash();         letterDelay(); }
void P(){ dot();  dash(); dash(); dot();  letterDelay(); }
void Q(){ dash(); dash(); dot();  dash(); letterDelay(); }
void R(){ dot();  dash(); dot();          letterDelay(); }
void S(){ dot();  dot();  dot();          letterDelay(); }
void T(){ dash();                         letterDelay(); }
void U(){ dot();  dot();  dash();         letterDelay(); }
void V(){ dot();  dot();  dot();  dash(); letterDelay(); }
void W(){ dot();  dash(); dash();         letterDelay(); }
void X(){ dash(); dot();  dot();  dash(); letterDelay(); }
void Y(){ dash(); dot();  dash(); dash(); letterDelay(); }
void Z(){ dash(); dash(); dot();  dot();  letterDelay(); }

// Morse Code Key: Numbers
void zero()   { dash(); dash(); dash(); dash(); dash(); letterDelay(); }
void one()    { dot();  dash(); dash(); dash(); dash(); letterDelay(); }
void two()    { dot();  dot();  dash(); dash(); dash(); letterDelay(); }
void three()  { dot();  dot();  dot();  dash(); dash(); letterDelay(); }
void four()   { dot();  dot();  dot();  dot();  dash(); letterDelay(); }
void five()   { dot();  dot();  dot();  dot();  dot();  letterDelay(); }
void six()    { dash(); dot();  dot();  dot();  dot();  letterDelay(); }
void seven()  { dash(); dash(); dot();  dot();  dot();  letterDelay(); }
void eight()  { dash(); dash(); dash(); dot();  dot();  letterDelay(); }
void nine()   { dash(); dash(); dash(); dash(); dot();  letterDelay(); }

// Morse Code Functions
void dot() {
   Serial.print("*");
   digitalWrite(morseLED, HIGH);
   delay(d*2);
   digitalWrite(morseLED, LOW);
   delay(d*4);
}

void dash() {
   Serial.print("-");
   digitalWrite(morseLED, HIGH);
   delay(d*6);
   digitalWrite(morseLED, LOW);
   delay(d*4);
}

// Delay in between letters
void letterDelay() {
   Serial.print("  ");
   delay(d*10);
}

// Delay in between words
void wordDelay() {
   Serial.println("");
   delay(d*20);
}

// The loop is not needed for this 
void loop() {}