#include "SevSeg.h"
#include "Button.h"
SevSeg sevseg; //Instantiate a seven segment controller object

// declare buttons
Button thirtySecButton(A0);
Button fifteenSecButton(A1);
Button topButton(A2);

enum Mode {
  countdown30,
  countdown15,
  stopped,
  timeOut,
};

Mode mode = timeOut;

void setup() {
  // setup display
  byte numDigits = 4;
  byte digitPins[] = {2, 3, 4, 5};
  byte segmentPins[] = {6, 7, 8, 9, 10, 11, 12, 13};
  bool resistorsOnSegments = false; // 'false' means resistors are on digit pins
  byte hardwareConfig = COMMON_ANODE; // See README.md for options
  bool updateWithDelays = false; // Default 'false' is Recommended
  bool leadingZeros = false; // Use 'true' if you'd like to keep the leading zeros
  bool disableDecPoint = false; // Use 'true' if your decimal point doesn't exist or isn't connected
  
  sevseg.begin(hardwareConfig, numDigits, digitPins, segmentPins, resistorsOnSegments,
  updateWithDelays, leadingZeros, disableDecPoint);
  sevseg.setBrightness(90);
  
  
  //setup buttons
  thirtySecButton.begin();
  fifteenSecButton.begin();
  topButton.begin();



  Serial.begin(9600);
}

void loop() {
  static unsigned long timer = millis();
  static int currentDisplayTime = 0;
  bool displayOff = false;

  if(thirtySecButton.pressed()) {
    timer = millis();
    currentDisplayTime = 300;
    mode = countdown30;
  }
  if(fifteenSecButton.pressed()) {
    timer = millis();
    currentDisplayTime = 150;
    mode = countdown15;
  }
  if(topButton.pressed()) {
    switch (mode) {
      case countdown30:
        mode = stopped;
        break;
      case countdown15:
        currentDisplayTime = 150;
        break;
    }
  }


  if(mode == stopped) {
      // toggle display "blink" not sure how you would do it, this doesn't work
      // sevseg.setBrightness(displayOff ? 90 : 0);
      // delay(300);
  }
  else if((millis() - timer >= 100)) {
    if(currentDisplayTime > 0) {
      timer += 100;
      sevseg.setNumber(currentDisplayTime, 1);

      currentDisplayTime -= 1;
    }
    else {
      sevseg.setNumber(00, 1);
      mode = timeOut;
    }
  }

  sevseg.refreshDisplay(); // Must run repeatedly
}