#include <avr/wdt.h>
unsigned long previousMillis[] = { 0, 0 };
unsigned long currentMillis = 0;
const long interval[] = { 10000, 5000, 1000 };  //30, 5 min
byte Switch = 2;
byte data[900];
byte data1[900];
int position = 0;
//const long interval = 20000; //5sec

void setup() {
  Serial.begin(9600);
  //wdt_reset();
  pinMode(A0, OUTPUT);  //čerpadlo
  pinMode(A1, INPUT);   //napětí baterie
  pinMode(A2, INPUT_PULLUP);   //senzor hladiny
  pinMode(A3, INPUT);   //napětí soláru
  pinMode(12, INPUT_PULLUP); //read data
  digitalWrite(A0, 1);
  delay(1000);
  digitalWrite(A0, 0);
  delay(1000);
  digitalWrite(A0, 1);
  //wdt_enable(WDTO_8S);
  //Serial.println("hello");
}

void loop() {
  //wdt_reset();
  //Serial.println("ok");
  //delay(1000);
  currentMillis = millis();
  switch (Switch) {
    case 1:
      if (currentMillis - previousMillis[0] >= interval[1]) {
        if (map(analogRead(A1), 0, 1023, 0, 15) > 7 && digitalRead(A2)==HIGH) {
          previousMillis[0] = currentMillis;
          digitalWrite(A0, 1);
          Switch = 2;
        //Serial.println("on");
        }
      }
      break;
    case 2:
      if (currentMillis - previousMillis[0] >= interval[0]) {
        previousMillis[0] = currentMillis;
        digitalWrite(A0, 0);
        Switch = 1;
        //Serial.println("off");
      }
      break;
  }
  if (digitalRead(A2) == LOW) {
    digitalWrite(A0, 0);
    //Serial.println("plno");
  }
  if (currentMillis - previousMillis[1] >= interval[2]) {
    previousMillis[1] = currentMillis;
    data[position] = map(analogRead(A1), 0, 1023, 0, 15);
    data1[position] = map(analogRead(A3), 0, 1023, 0, 35);
    position++;
  }
  //Serial.println(map(analogRead(A1),0,1023,0,15));
  //Serial.println(analogRead(A2));
  if (digitalRead(12) == LOW) {
    sendData();
  }
}

void sendData() {
  Serial.println("chceš data?");
  while (1) {
    if (Serial.available()) {
      String input = Serial.readString();
      String readableTime;
      getReadableTime(readableTime);
      Serial.println(readableTime);
      for (int i = 0; i < sizeof(data); i++) {
        Serial.print(data[i]);
        Serial.print(" ");
      }
      Serial.println();
      for (int i = 0; i < sizeof(data1); i++) {
        Serial.print(data1[i]);
        Serial.print(" ");
      }
      Serial.println();
      break;
    }
  }
}

void getReadableTime(String &readableTime) {

  unsigned long currentMillis;
  unsigned long seconds;
  unsigned long minutes;
  unsigned long hours;
  unsigned long days;

  currentMillis = millis();
  seconds = currentMillis / 1000;
  minutes = seconds / 60;
  hours = minutes / 60;
  days = hours / 24;
  currentMillis %= 1000;
  seconds %= 60;
  minutes %= 60;
  hours %= 24;

  if (days > 0) {
    readableTime = String(days) + "d ";
  }

  if (hours > 0) {
    readableTime += String(hours) + "h:";
  }

  if (minutes < 10) {
    readableTime += "0";
  }
  readableTime += String(minutes) + "m:";

  if (seconds < 10) {
    readableTime += "0";
  }
  readableTime += String(seconds) + "s ago";
}