#include "Display.h"
#include <Bounce2.h>

const int RLED = 4;         // Red Led.
const int BTN_Display = 8;  // Button switches between modes.
const int BTN_Alarm = 9;    // Button activates alarm.
Bounce Switch = Bounce();   // Debounces BTN_Display.
Bounce Alarm = Bounce();    // Debounces BTN_Alarm.

const int PIN_POTMETER = 14; // Potentiometer
const int MAX_ANGLE = 280;   // Max angle set to 30 degrees.

const int PIN_NTC = 15;
const int NTC_R25 = 10000;
const int NTC_MATERIAL_CONSTANT = 3950;
float temperature, resistance;
int value;

float celcius;
int angle;

bool ALARM = false;  // Boolean variable for the alarm.
bool TEMP_THRESHOLD = false; // Boolean variable for the temperature alarm.
int modeD = 0; // Variable to switch between modes.

String winform_Output; // String for the windows form output.

int get_knob_angle()
{
  int sensor_value = analogRead(PIN_POTMETER);
  int angle;
  angle = map(sensor_value, 0, 9500, 0, MAX_ANGLE);
  return angle;
}

float get_temperature()
{
  value = analogRead(PIN_NTC);
  resistance = (float)value * NTC_R25 / (1024 - value);
  temperature = 1 / (log(resistance / NTC_R25) / NTC_MATERIAL_CONSTANT + 1 / 298.15) - 273.15;
  return temperature;
}

void red_led() // Method that turns on the red LED; created a method because for some reason it lagged when the line was only digitalWrite...
{
  digitalWrite(RLED, HIGH);
}



void setup() {
  Serial.begin(9600);
  pinMode(RLED, OUTPUT);
  pinMode(BTN_Display, INPUT_PULLUP);
  Switch.attach(BTN_Display);  // Button debouncing.
  Switch.interval(5);  // Interval for the button debouncing.
  pinMode(BTN_Alarm, INPUT_PULLUP);
  Alarm.attach(BTN_Alarm);
  Alarm.interval(5);
  pinMode(PIN_POTMETER, INPUT);
  Serial.setTimeout(300); // How often it reads the windows form app output. (interval)

}

void loop() {

  Switch.update(); // Updates the BTN_Display
  Alarm.update(); // Updates the BTN_Alarm

  angle = get_knob_angle(); // Gets angle
  celcius = get_temperature(); // Gets temperature
  Serial.println(celcius); // Prints temperature to the windows form app

  winform_Output = Serial.readStringUntil('\n'); // Reads from windows form app untill a new line
  winform_Output.trim(); // Removes excess output from the windows form app

  if (Switch.fell()) // Switches between display modes
  {
    modeD++;
    if (modeD == 4)
    {
      modeD = 1;
    }
  }

  if (modeD == 1)
  {
    Serial.println("HHmm"); // Requests time from windows form app
    Display.show(winform_Output); // Displays time
  }

  if (modeD == 2)
  {
    Display.show(celcius); //displays temerature
  }

  if (modeD == 3)
  {
    Display.show(angle); // displays angle
  }

  if (Alarm.fell() && ALARM == false) //when BTN_Alarm is pressed and the alarm is off, the button turns the alarm on
  {
    ALARM = true; // Turns the alarm on
    Serial.println("Button Alarm is ON!"); //Prints to windows form app
  }

  if (winform_Output == "Button Reset.") //Checks if alarm has been reset from windows form app
  {
    if (ALARM == true) // If the button alarm has been activated, it will reset it
    {
      ALARM = false;
      Serial.println("Button Alarm is OFF!"); //Prints to windows form app
    }
    if (TEMP_THRESHOLD == true)// If the temperature alarm was on, it will reset it
    {
      TEMP_THRESHOLD = false;
      Serial.println("Temperature alarm is OFF!"); //Prints to windows form app
    }
  }

  if ((celcius < 16 || celcius > 30) && TEMP_THRESHOLD == false)// Checks for the temperature threshold and turns on the temperature alarm
  {
    TEMP_THRESHOLD = true;
    Serial.println("Temperature Threshold reached."); //prints to windows form app
  }

  if (ALARM == true || TEMP_THRESHOLD == true) // If either one of the alarms is on, the red LED lights up
  {
    red_led();
  }
  else
  {
    digitalWrite(RLED, LOW);
  }
  delay(50);

}