//Debug mode, comment one of these lines out using a syntax
//for a single line comment ("//"):
//#define DEBUG 0     //0 = LEDs only
#define DEBUG 1     //1 = LEDs w/ serial output

// Define our LED pins:
#define redPin 5
#define greenPin 6
#define bluePin 9

// Create integer variables for our LED color value:
int redValue = 0;
int greenValue = 0;
int blueValue = 0;

//Create brightness variable
//Ranging from 0.0-1.0:
//  0.0 is off
//  0.5 is 50%
//  1.0 is fully on
float brightness_LED = 0.1;

//Create variables for type of LED and if it is used with a transistor
boolean common_anode = false;
boolean common_cathode = true;//i.e.) When pin is HIGH, LED will also go HIGH without a transistor/PicoBuck

// Note:
//  Common Anode is `common_anode`
//  Common Cathode LED is `common_cathode`
//  Common Anode RGB LED Strip with transistor is `!common_anode`
//  RGB High Power LED with PicoBuck is also  `!common_anode`
boolean RGB_type = !common_anode;

int colorMode = 1; //color mode to control LED color

int prev_FadeVal = 0;
int current_FadeVal = 0;
boolean increasing = true;
int fadeVal = 5; //value to step when increasing/decreasing, recommended to be 1 or 5, larger numbers will have problems lighting up
int fadeMAX = 255; //maximum fade value
int fadeMIN = 0;   //minimum fade value
int fadeDelay = 30;//delay between each step




void setup() {

  // Make all of our LED pins outputs:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(bluePin, OUTPUT);

  allOFF(); //make sure to initialize LEDs with it turned off
  show_RGB(); //make sure to show it happening

#if DEBUG
  Serial.begin(9600); //initialize Serial Monitor
  //while (!Serial); // Comment out to wait for serial port to connect to Serial Monitor. Needed for native USB.
  Serial.println("Custom Color Mixing w/ an RGB LED.");
  Serial.println(" ");
  Serial.println("Note: Make sure to adjust the code for a common cathode or common anode.");
  Serial.println("Default is set to no color and off!");
  Serial.println(" ");
#endif

}//end setup()

void loop()
{


  switch (colorMode) {
    case 1://FADE RED
      redValue = current_FadeVal;
      greenValue = 0;
      blueValue = 0;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    case 2://FADE ORANGE
      redValue = current_FadeVal;
      greenValue = current_FadeVal * 0.498; // 128/255 = ~0.498039
      blueValue = 0;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);

      if (redValue > 0 && greenValue == 0) {
        //tertiary component is 1/2, so when it calculates to decimal with fade value,
        //it will be basically be off, make sure to turn off other color so that
        //it does not just show the other color
        redValue = 0;
      }

      // takes x amount of steps if you do not set it to zero for certain brightness (i.e. takes 8 more steps to turn off for 0.1)
      //Serial.print("Red Value =");
      //Serial.println( int((current_FadeVal) * brightness_LED));

      //Serial.print("Green Value =");
      //Serial.println( int((current_FadeVal * 0.498) * brightness_LED));
      break;
    case 3://FADE YELLOW
      redValue = current_FadeVal;
      greenValue = current_FadeVal;
      blueValue = 0;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    case 4://FADE CHARTRUESE
      redValue = current_FadeVal * 0.498; // 128/255 = ~0.498039
      greenValue = current_FadeVal;
      blueValue = 0;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);

      if (greenValue > 0 && redValue == 0) {
        //tertiary component is 1/2, so when it calculates to decimal with fade value,
        //it will be basically be off, make sure to turn off other color so that
        //it does not just show the other color
        greenValue = 0;
      }
      break;
    case 5://FADE GREEN
      redValue = 0;
      greenValue = current_FadeVal;
      blueValue = 0;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    case 6://FADE SPRING GREEN
      redValue = 0;
      greenValue = current_FadeVal;
      blueValue = current_FadeVal * 0.498; // 128/255 = ~0.498039

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);

      if (greenValue > 0 && blueValue == 0) {
        //tertiary component is 1/2, so when it calculates to decimal with fade value,
        //it will be basically be off, make sure to turn off other color so that
        //it does not just show the other color
        greenValue = 0;
      }
      break;
    case 7://FADE CYAN
      redValue = 0;
      greenValue = current_FadeVal;
      blueValue = current_FadeVal;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    case 8://FADE AZURE
      redValue = 0;
      greenValue = current_FadeVal * 0.498; // 128/255 = ~0.498039
      blueValue = current_FadeVal;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);

      if (blueValue > 0 && greenValue == 0) {
        //tertiary component is 1/2, so when it calculates to decimal with fade value,
        //it will be basically be off, make sure to turn off other color so that
        //it does not just show the other color
        blueValue = 0;
      }
      break;
    case 9://FADE BLUE
      redValue = 0;
      greenValue = 0;
      blueValue = current_FadeVal;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    case 10://FADE VIOLET
      redValue = current_FadeVal * 0.498;
      greenValue = 0;
      blueValue = current_FadeVal;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);// 128/255 = ~0.498039
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);

      if (blueValue > 0 && redValue == 0) {
        //tertiary component is 1/2, so when it calculates to decimal with fade value,
        //it will be basically be off, make sure to turn off other color so that
        //it does not just show the other color
        blueValue = 0;
      }
      break;
    case 11://FADE MAGENTA
      redValue = current_FadeVal;
      greenValue = 0;
      blueValue = current_FadeVal;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    case 12://FADE ROSE
      redValue = current_FadeVal;
      greenValue = 0;
      blueValue = current_FadeVal * 0.498;

      calculate_RGB();

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);// 128/255 = ~0.498039

      if (redValue > 0 && blueValue == 0) {
        //tertiary component is 1/2, so when it calculates to decimal with fade value,
        //it will be basically be off, make sure to turn off other color so that
        //it does not just show the other color
        redValue = 0;
      }
      break;
    case 13://FADE WHITE
      redValue = current_FadeVal;
      greenValue = current_FadeVal;
      blueValue = current_FadeVal;

      redValue = int(redValue * brightness_LED);
      greenValue = int(greenValue * brightness_LED);
      blueValue = int(blueValue * brightness_LED);
      break;
    default:
      allOFF();
      break;
  }
  show_RGB();
  delay(fadeDelay);


  if (increasing == true) {
    //increasing
    current_FadeVal += fadeVal;
  }
  else {
    //decreasing
    current_FadeVal -= fadeVal;
  }

  if (current_FadeVal > fadeMAX) {
    increasing = false;
    prev_FadeVal -= fadeVal;//undo addition

    current_FadeVal = prev_FadeVal;
  }
  else if (current_FadeVal < fadeMIN) {
    increasing = true;
    prev_FadeVal += fadeVal;//undo subtraction

    current_FadeVal = prev_FadeVal;

    colorMode += 1;//next color
    if (colorMode > 13) {
      colorMode = 0;
    }
  }

  prev_FadeVal = current_FadeVal;

}//END LOOP




// ==================== CUSTOM FUNCTIONS DEFINED BELOW ====================
void allOFF() {
  // Black (all LEDs off)
  // RGB LEDs:
  redValue = 0;
  greenValue =  0;
  blueValue = 0;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void redON() {
  // Red
  redValue = 255;
  greenValue =  0;
  blueValue = 0;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void orangeON() {
  // Orange
  redValue = 255;
  greenValue = 128;
  blueValue = 0;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void yellowON() {
  // Yellow
  redValue = 255;
  greenValue = 255;
  blueValue = 0;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void chartrueseON() {
  // Chartruese
  redValue = 128;
  greenValue = 255;
  blueValue = 0;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void greenON() {
  // Green
  redValue = 0;
  greenValue = 255;
  blueValue = 0;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void springGreenON() {
  // Spring Green
  redValue = 0;
  greenValue = 255;
  blueValue = 128;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void cyanON() {
  // Cyan
  redValue = 0;
  greenValue = 255;
  blueValue = 255;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void azureON() {
  // Azure
  redValue = 0;
  greenValue = 128;
  blueValue = 255;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void blueON() {
  // Blue
  redValue = 0;
  greenValue = 0;
  blueValue = 255;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void violetON() {
  // Violet
  redValue = 128;
  greenValue = 0;
  blueValue = 255;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void magentaON() {
  // Magenta
  redValue = 255;
  greenValue = 0;
  blueValue = 255;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void roseON() {
  // Rose
  redValue = 255;
  greenValue = 0;
  blueValue = 128;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}

void whiteON() {
  // White (all LEDs on)
  redValue = 255;
  greenValue = 255;
  blueValue = 255;

  calculate_RGB();

  redValue = int(redValue * brightness_LED);
  greenValue = int(greenValue * brightness_LED);
  blueValue = int(blueValue * brightness_LED);
}



void calculate_RGB() {
  //use this to correctly light up LED depending on the setup
  if (RGB_type == common_anode) {
    /* If using a common anode LED, a pin
       should turn ON the LED when the pin is LOW.*/
    redValue = 255 - redValue;
    greenValue = 255 - greenValue;
    blueValue = 255 - blueValue;

  }
  else {
    /* If using a common cathode LED, an analog pin
       should turn on the LED when the pin is HIGH. The
       logic is flipped when using a Common Anode RGB LED
       strip, NPN BJT/N-Channel MOSFET, and microcontroller

       Leave RGB values as is, we're good!*/
  }
}

void show_RGB() {
  //once value is calculated, show the LED color
  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);
}