#include <Keypad.h>
#include <Joystick.h>
#include <EEPROM.h>

const byte ROWS = 5; //four rows
const byte COLS = 4; //three columns
const int pressdelay = 50;
byte rowPins[ROWS] = { 2, 3, 4, 5, 6 }; //connect to the row pinouts of the keypad
byte colPins[COLS] = { 15, 14, 16, 10 }; //connect to the column pinouts of the keypad
const char keys[ROWS][COLS] = {
  { '0', '1', '2', '3'},
  { '4', '5', '6', '7'},
  { '8', '9', 'a', 'b'},
  { 'c', 'd', 'e', 'f'},
  { 'g', 'h', 'i', 'j'},
};

const int ledPin = 9; 
const int dimVals [] = { 255, 200, 150, 100, 50, 10, 0 };
const int eepromAddress = 88; //Generated by a random external source - griffiths :)
int dimLevel = 6;



Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
  Joystick.begin(false);
  dimLevel = EEPROM.read(eepromAddress);
}


void pressKey(int Key) {
  Joystick.setButton(Key, 1);
  Joystick.sendState();
  delay(pressdelay);
  Joystick.setButton(Key, 0);
  Joystick.sendState();
}

void changeDim (bool level) { //Are we changing the values up or down?
  if (level) { dimLevel -= 1; } // An increase in values means a decrease in brightness!
  else { dimLevel +=1; }
  
  //If we are out of bounds, theres no point updating th\\\\\\e value. Just set it back inside boundries to save EEPROM write cycles.
  if (dimLevel<0) { dimLevel = 0; }
  else if (dimLevel>6){ dimLevel = 6; }
  else { // Looks like the value has changed. Commit it to EEPROM.
    EEPROM.write(eepromAddress, dimLevel);
    Serial.println(dimLevel);
  }
}

void loop(){
  char key = keypad.getKey();
  
  if (key){
    Serial.println(key);
    switch(key){
      case '0':
        //pressKey(0);
        changeDim(false);
        break;
      case '1':
        //pressKey(1);
        changeDim(true);
        break;
      case '2':
        pressKey(2);
        break;
      case '3':
        pressKey(3);
        break;
      case '4':
        pressKey(4);
        break;
      case '5':
        pressKey(5);
        break;
      case '6':
        pressKey(6);
        break;
      case '7':
        pressKey(7);
        break;
      case '8':
        pressKey(8);
        break;
      case '9':
        pressKey(9);
        break;
      case 'a':
        pressKey(10);
        break;
      case 'b':
        pressKey(11);
        break;
      case 'c':
        pressKey(12);
        break;
      case 'd':
        pressKey(13);
        break;
      case 'e':
        pressKey(14);
        break;
      case 'f':
        pressKey(15);
        break;
      case 'g':
        pressKey(16);
        break;
      case 'h':
        pressKey(17);
        break;
      case 'i':
        pressKey(18);
        break;
      case 'j':
        pressKey(19);
        break;
                       
    }
    
   }
   analogWrite(ledPin, dimVals[dimLevel]);
}