//#include "Wire.h";
#include <LiquidCrystal_I2C.h>;

LiquidCrystal_I2C lcd(0x27,20,4);

int water_low  = 4;
int water_high = 5;
int pump_relay = 6;
int low_water_state =  0;
int high_water_state = 0;
int pump_run_time = 0;
bool pump_running = false;

void setup() {
//Serial.begin(9600);
lcd.init();
lcd.setBacklight(HIGH);
lcd.setCursor(0,0);
lcd.print("Poollevel controller");
lcd.setCursor(0,1);
lcd.print("     ");
lcd.setCursor(0,2);
lcd.print("        V0.9");
lcd.setCursor(0,3);
lcd.print("    Hello Rowen!");   

pinMode(water_low,INPUT);
pinMode(water_high,INPUT);
pinMode(pump_relay, OUTPUT);

delay(1000);

}

void loop() {
low_water_state  = digitalRead(water_low);
high_water_state = digitalRead(water_high);
//Serial.print(low_water_state);
//Serial.print(", ");
//Serial.println(high_water_state);

if((low_water_state == 0) && (high_water_state == 0)){
lcd.setCursor(0,1);
lcd.print("High level: OK      ");
lcd.setCursor(0,2);
lcd.print("Low level : OK      ");
lcd.setCursor(0,3);
lcd.print("Pump has run:    ");
lcd.setCursor(15,3);
lcd.print(pump_run_time);
pump_running = false;
digitalWrite(pump_relay,LOW);
}
else if((low_water_state == 1) && (high_water_state == 0)){
lcd.setCursor(0,1);
lcd.print("High level: OK      ");
lcd.setCursor(0,2);
lcd.print("Low level : Reached ");
  if(pump_running == false){
    digitalWrite(pump_relay,LOW);
  }
  else if(pump_running == true){
    digitalWrite(pump_relay, HIGH);
  }  
lcd.setCursor(0,3);
lcd.print("Pump has run:    ");
lcd.setCursor(15,3);
lcd.print(pump_run_time);
}
else if((low_water_state == 1) && (high_water_state == 1)){
lcd.setCursor(0,1);
lcd.print("High level: Reached ");
lcd.setCursor(0,2);
lcd.print("Low level : Reached ");
digitalWrite(pump_relay,HIGH);
  if(pump_running == false){
    pump_running = true;
    pump_run_time ++;
  }
   
lcd.setCursor(0,3);
lcd.print("Pump has run:    ");
lcd.setCursor(15,3);
lcd.print(pump_run_time);

}
else if((low_water_state == 0) && (high_water_state == 1)){
lcd.setCursor(0,1);
lcd.print("High level: Ok      ");
lcd.setCursor(0,2);
lcd.print("Low level : OK      ");
digitalWrite(pump_relay,LOW);

} 
}