/*
  LED Blink in a class with no delay
*/

//ref: https://www.arduino.cc/education/morse-code-project/
char* letters[] = {
".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..", // A-I
".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.", // J-R 
"...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.." // S-Z
};

//For Numbers
char* numbers[] = {
  "-----", ".----", "..---", "...--", "....-", ".....",
"-....", "--...", "---..", "----."
};


int dotDelay = 200;
char inputString[256];


void setup() {
  Serial.begin(9600);
  Serial.println("Hello Audrey\n");
}

void loop() {


  bool gotString = getSerialInput();
  if(gotString)
  {
    // we have the sentence now
    Serial.println(inputString);

    // loop over each character
    for(int i = 0; i < strlen(inputString); i++)
    {
      char letter = inputString[i];
      Serial.println(letters[letter - 'A']);
      morseCharacter(letter);
    }
  }
}


bool getSerialInput() 
{
  if(Serial.available())
  {
    size_t size = Serial.readBytesUntil('\n', inputString, 255);
    inputString[size] = 0;
    return true;
  } 
  else 
  {
    return false;
  }
}

void morseCharacter(char ch) {
  
  char* seq = "";
  int i = 0;

  //ref: https://forum.arduino.cc/t/converting-char-to-upper-case/69221
  //convert any lowercase letters to uppercase
  if(ch >= 'a' && ch <= 'z') ch += 'A' - 'a';

  if (ch >= 'A' && ch <= 'Z') 
  {
    seq = letters[ch - 'A']; 
  }
  else if (ch >= '0' && ch <= '9') 
  {
    seq = numbers[ch - '0']; 
  }
  else if (ch == ' ') 
  {
    Serial.println("space between words");
    delay(dotDelay * 7);
  }

  while (seq[i] != NULL) 
  {
    digitalWrite(13, HIGH); 
    if (seq[i] == '.')
    {
      Serial.println("dot");
      delay(dotDelay);
    }
    else
    {
      Serial.println("dash");
      delay(dotDelay * 3); 
    }
    digitalWrite(13, LOW); 

    Serial.println("space between parts");
    delay(dotDelay);
    i++;
  }
  Serial.println("space between letters");
  delay(dotDelay * 3);
}