#include <Arduino.h>
#include <TM1637Display.h>
#include <EEPROM.h>
#include <OneButton.h>
#include <SimpleTimer.h>

// the timer object
SimpleTimer timer;

// define the connections pins
#define CLK 9
#define DIO 10
#define TEMP_PIN A0
#define RED_PIN 8
#define GREEN_PIN 7
const float BETA = 3950; // should match the Beta Coefficient of the thermistor
int temperature_hight = 26;
int temperature_low = 24;
unsigned int addr_eeprom_temperature_hight = 0;
unsigned int addr_eeprom_temperature_low = 3;
#define buttonPin_up A4
#define buttonPin_down A5
//const int buttonPin_up = 2;
//const int buttonPin_down = 3;

// The actions I ca do...
typedef enum {
  ACTION_WORK,  
  ACTION_SETUP
} MyActions;

MyActions nextAction = ACTION_WORK;  // no action when starting

// Setup a new OneButton on pin A1.  
OneButton buttonUp(buttonPin_up);
OneButton buttonDown(buttonPin_down);

// create a display object of type TM1637Display
TM1637Display display = TM1637Display(CLK, DIO);

// degree celsius symbol
const uint8_t celsius[] = {
  SEG_A | SEG_B | SEG_F | SEG_G,  // Degree symbol
  SEG_A | SEG_D | SEG_E | SEG_F   // C
};

// set default temperature
int init_eeprom (int a, int t) {
   int value = 0;

    EEPROM.get(a, value);
      //Serial.print(a);
      //Serial.print("\t");
      //Serial.println(value);

    if (value < 10 || value > 99) {
      EEPROM.put(a, t);
    }
    EEPROM.get(a, value);

    return value; // return temperature
};

void set_temperature_eeprom (int a) {
  
  int value;
  int time = 150;
  EEPROM.get(a, value);

  while (time >= 0) {


    if (analogRead(buttonPin_up) == 0) {
      EEPROM.get(a, value);
      value+=1;
      EEPROM.put(a, value);
      delay(300);
      time = 150;
      //Serial.print(a1);
      //Serial.print("\t");
      //Serial.println(value);
    } else if (analogRead(buttonPin_down) == 0) {
      EEPROM.get(a, value);
      value -= 1;
      EEPROM.put(a, value);
      delay(300);
      time = 150;
     //Serial.print(a2);
      //Serial.print("\t");
      //Serial.println(value);
    }
    //Serial.print(time);
    time--;
    display.showNumberDec(value, false, 2, 0);
    display.setSegments(celsius, 2, 2);
    nextAction = ACTION_WORK;
  }
  //display.showNumberDec(value, false, 2, 0);
  //display.setSegments(celsius, 2, 2);
 // delay(750);
 // display.clear();

}

void relay (int t) {
  int value;
  EEPROM.get(addr_eeprom_temperature_hight, value);
  if (t < value + 1) {
    digitalWrite(RED_PIN, HIGH);
    digitalWrite(GREEN_PIN, LOW);
  }
  else {
    digitalWrite(RED_PIN, LOW);
    digitalWrite(GREEN_PIN, HIGH);
  }
} 

void doubleclick() {

  if (nextAction == ACTION_WORK) {
    nextAction = ACTION_SETUP;

  } else if (nextAction == ACTION_SETUP) {
    nextAction = ACTION_WORK;

  }
  
} // doubleclick

  
void setup() {
  display.clear();
  display.setBrightness(7); // set the brightness to 7 (0:dimmest, 7:brightest)

  init_eeprom (addr_eeprom_temperature_hight, temperature_hight);
  init_eeprom (addr_eeprom_temperature_low, temperature_low);

  // link the doubleclick function to be called on a doubleclick event.   
  //buttonUp.attachDoubleClick(doubleclick);
  //buttonDown.attachDoubleClick(doubleclick);
  buttonUp.attachLongPressStart(doubleclick);
  buttonDown.attachLongPressStart(doubleclick);

  buttonUp.setDebounceMs(80);
  buttonDown.setDebounceMs(80);


  pinMode(buttonPin_up, INPUT_PULLUP);
  pinMode(buttonPin_down, INPUT_PULLUP);

  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);

  timer.setInterval(20*60000); // wait 20*60 seconds - 20 min

  Serial.begin(9600);
}

void loop() {

  //int temp_hight = init_eeprom (addr_eeprom_temperature_hight, temperature_hight);
  //int temp_low = init_eeprom (addr_eeprom_temperature_low, temperature_low);
  
  //Serial.print(digitalRead(buttonPin_down));
  //Serial.print("\t");
  //Serial.print(digitalRead(buttonPin_up));
  //Serial.println();
  //Serial.print(nextAction);
  //Serial.println();

    // keep watching the push button:
  buttonUp.tick();
  buttonDown.tick();
  
  if (timer.isReady()) {            // Check is ready a timer
        Serial.println("20 min have passed");
        digitalWrite(RED_PIN, LOW);
        digitalWrite(GREEN_PIN, HIGH);
        delay(2000);
        timer.reset();
  }

  
  if (nextAction == ACTION_WORK) {
    // normal mode.
    
    int temperature = analogRead(TEMP_PIN);
    float temperature_celsius = 1 / (log(1 / (1023. / temperature - 1)) / BETA + 1.0 / 298.15) - 273.15;

    relay(temperature_celsius);

    // displayed temperature
    display.showNumberDec(temperature_celsius, false, 2, 0);
    display.setSegments(celsius, 2, 2);
    delay(100);
  //  display.clear();

  } else if (nextAction == ACTION_SETUP) {
    // setup mode.
    set_temperature_eeprom (addr_eeprom_temperature_hight);
    //delay(100);
    //display.clear();
  }

}