// Sketch for testing switch between loops for LED patterns v2

unsigned long lastMilli = 0;
byte mode = 0;

unsigned long lastCheck = 0;
int intervalDebounce = 50;

int ledPin =  9;      // the number of the LED pin
int pinSwitch = 2;

int ledState = LOW;             // ledState used to set the LED

long Mode1OnTime =      500;           // milliseconds of on-time
int Mode1OnIncrement =  100;       // increment on time in milliseconds
int M1OnTimeMax =       1000 - Mode1OnIncrement; // Mode 1 max on time before cycling back to start

long Mode2OnTime =      1000;          // milliseconds of on-time
long Mode2OnIncrement = 1000;      // increment on time in milliseconds
int M2OnTimeMax =       5000 - Mode2OnIncrement; // Mode 2 max on time before cycling back to start

const unsigned long  MsecLedOff =   500;          // milliseconds of off-time

long M1OnTimeCurr = Mode1OnTime;   // initialize variable for Mode 1 current OnTime incrementing
long M2OnTimeCurr = Mode2OnTime;   // initialize variable for Mode 2 current OnTime incrementing

void setup()
{
  pinMode(ledPin, OUTPUT);
  pinMode(pinSwitch, INPUT_PULLUP);
  // initialize serial communication:
  Serial.begin(9600);
}

void loop()
{

  if (millis() - lastCheck >= intervalDebounce) {
    lastCheck = millis();
    if (digitalRead(pinSwitch) == HIGH) {
      if (mode != 1) {
        Serial.println("Mode 1");
        mode = 1;
      }
    }
    else {
      if (mode != 2) {
        Serial.println("Mode 2");
        mode = 2;
      }
    }
  }

  switch (mode) {
    case 1: mode1(); break;
    case 2: mode2(); break;
  }

}

// mode 1 pattern
void mode1() {

  M2OnTimeCurr = Mode2OnTime; // reset Mode 1 cycle for it's next start

  // check to see if it's time to change the state of the LED
  unsigned long currentMillis = millis();

  if((ledState == HIGH) && (millis() - lastMilli >= M1OnTimeCurr))
  {
    ledState = LOW;  // Turn it off
    lastMilli = currentMillis;  // Remember the time
    //Serial.print ("mode 1 off time: ");
    //Serial.println (MsecLedOff);
    digitalWrite(ledPin, ledState);  // Update the actual LED
    // increment on time up to Max
    if((M1OnTimeCurr <= M1OnTimeMax)) {
      M1OnTimeCurr = M1OnTimeCurr + Mode1OnIncrement;
    }
    else
      M1OnTimeCurr = Mode1OnTime; // after Max cycle set back to preset
  }

  else if ((ledState == LOW) && (currentMillis - lastMilli >= MsecLedOff))
  {
    ledState = HIGH;  // turn it on
    lastMilli = currentMillis;   // Remember the time
    Serial.print ("mode 1 on time: ");
    Serial.println (M1OnTimeCurr);
    digitalWrite(ledPin, ledState);   // Update the actual LED
  }
}

// mode 2 pattern
void mode2() {

  // check to see if it's time to change the state of the LED
  unsigned long currentMillis = millis();

  if((ledState == HIGH) && (currentMillis - lastMilli >= M2OnTimeCurr))
  {
    ledState = LOW;  // Turn it off
    lastMilli = currentMillis;  // Remember the time
    //Serial.print ("mode 2 off time: ");
    //Serial.println (MsecLedOff);
    digitalWrite(ledPin, ledState);  // Update the actual LED
    // increment on time up to Max
    if((M2OnTimeCurr <= M2OnTimeMax)) { 
      M2OnTimeCurr = M2OnTimeCurr + Mode2OnIncrement;
    }
    else
      M2OnTimeCurr = Mode2OnTime; // after Max cycle set back to preset
  }

  else if ((ledState == LOW) && (currentMillis - lastMilli >= MsecLedOff))
  {
    ledState = HIGH;  // turn it on
    lastMilli = currentMillis;   // Remember the time
    Serial.print ("mode 2 on time: ");
    Serial.println (M2OnTimeCurr);
    digitalWrite(ledPin, ledState);   // Update the actual LED
  }
}