/*
  State Change and Blink State 03
  November 03-05, 2023
  need to fix mini-blinks
*/

// circuit connections
const byte buttonPin = 2;  // pushbutton to pin 2 with 10 kOhm resistor
const byte ledPin = 3;     // LED to pin 3 with 220 ohm resistor

// set desired number of blinks and timing here
const int numBlinks = 3;
const long interval = 250;
// below needs no adjustment as it is derived from the two above
// note: numBlinks * 2 because each blink is on + off sequence
const long stopInterval = interval * (numBlinks * 2) + interval;

// prepare state management
int currentButtonState;    // current state of button
int lastButtonState;       // previous state of the button
int blinkState = LOW;

// prepare timer management
unsigned long startTime = 0;
unsigned long endTime = 0;

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
  //Serial.begin(9600);
  currentButtonState = digitalRead(buttonPin);
}

void loop() {
  currentButtonState = digitalRead(buttonPin);

  // toggle button action, blinkState, and begin timer
  if (lastButtonState == HIGH && currentButtonState == LOW) {
    startTime = millis();
    endTime = startTime + stopInterval;
    blinkState = !blinkState;
  }
  lastButtonState = currentButtonState;

  if (blinkState == HIGH) {
    // Serial.println("blinkState: HIGH");
    blinkPattern();
  }
  if (blinkState == LOW) {
    // Serial.println("blinkState: LOW");
    ledOff();
  }
}

void ledOff() {
  digitalWrite(ledPin, LOW);
}

void ledOn() {
  digitalWrite(ledPin, HIGH);
}

void blinkPattern() {

  while (millis() - startTime > interval) {
    // blink the LED (numBlinks) times
    digitalWrite(ledPin, !digitalRead(ledPin));
    startTime = millis();

    // then stop blinking and do something else
    if (startTime >= endTime) {
      ledOn();  // if low, then needs fixing due to mini-blinks
    }
  }
}