#include <Wire.h>
#include <I2C_RTC.h>

static DS3231 RTC;

int PumpOn = HIGH;
int PumpOff = LOW;
int ValveOpen = HIGH;
int ValveClosed = LOW;

int ValveA = 5;
int ValveB = 2;
int PumpRly = 6;
//create a container for events
struct event {uint8_t hour, uint8_t minute, uint8_t pin, uint8_t state};
// and an array of those events
event events[] = {
  {6, 0,  ValveA, ValveOpen},     //To open valve A at 6
  {6, 15, ValveA, ValveClosed},   //To close valve A at 6:15
  {7, 0,  ValveB, ValveOpen},     //To open valve B
  {7, 15, ValveB, ValveClosed},    //To close valve B
  {8, 0,  ValveA, ValveOpen},     //To open valve A
  {8, 15, ValveA, ValveClosed},   //To close valve A
  {9, 0,  ValveB, ValveOpen},     //To open valve B
  {9, 15, ValveB, ValveClosed},    //To close valve B
  {10, 0,  ValveA, ValveOpen},    //To open valve A 
  {10, 15, ValveA, ValveClosed},  //To close valve A
  {11, 0,  ValveB, ValveOpen},    //To open valve B 
  {11, 15, ValveB, ValveClosed}   //To close valve B
  {12, 0,  ValveA, ValveOpen},    //To open valve A 
  {12, 15, ValveA, ValveClosed},  //To close valve A
  {13, 0,  ValveB, ValveOpen},    //To open valve B
  {13, 15, ValveB, ValveClosed},   //To close valve B
  {14, 0,  ValveA, ValveOpen},    //To open valve A 
  {14, 15, ValveA, ValveClosed},  //To close valve A
  {15, 0,  ValveB, ValveOpen},    //To open valve B 
  {15, 15, ValveB, ValveClosed},   //To close valve B
  {16, 0,  ValveA, ValveOpen},    //To open valve A 
  {16, 15, ValveA, ValveClosed},  //To close valve A
  {17, 0,  ValveB, ValveOpen},    //To open valve B 
  {17, 15, ValveB, ValveClosed},   //To close valve B
  {18, 0,  ValveA, ValveOpen},    //To open valve A 
  {18, 15, ValveA, ValveClosed},  //To close valve A
  {19, 0,  ValveB, ValveOpen},    //To open valve B 
  {19, 15, ValveB, ValveClosed}   //To close valve B
};

void setup() {
  Serial.begin(9600);
  RTC.begin();
  pinMode(ValveA, OUTPUT);
  pinMode(ValveB, OUTPUT);
  pinMode(PumpRly, OUTPUT);
  Serial.println("Hello!  Setup is complete.");
}

void loop() {
  int PinState = digitalRead(PumpRly);   //the digital read must be aligned with the chosen definition of the pump state.  for example, a HIGH might be on or off.
  int LevelSense = analogRead(A0);
  float voltage = LevelSense * (5.0 / 1023.0);

  int Month = (RTC.getMonth());
  int Day = (RTC.getDay());
  int Hour = (RTC.getHours());
  int Minute = (RTC.getMinutes());
  int Second = (RTC.getSeconds());
  bool printflag = 0;

  //Pump control; turns pump on if level sensor drops below 2.00v and keeps it on until it rises to 2.40v
  //only flags printout if something is changed
  if (voltage <= 2.00) {
    if (PinState == PumpOff) {
      digitalWrite (PumpRly, PumpOn);
      printflag = 1;
    }//end of turnon
  }//end of low voltage response
  if (voltage > 2.4) {
    if (PinState == PumpOn) {
      digitalWrite (PumpRly, PumpOff);
      printflag = 1;
    }//end of shutoff
  }//end of high voltage response
  //end of pump control code

  //valve event code:
  for (int index = 0; index < sizeof(events) / sizeof(events[0][]); index++) { //loop through the array, process any line that matches the present time
    //if the time specified matches current time and the output needs changing, assert the valve state and print a report
    if (Hour == events[index].hour && Minute == events[index].minute && digitalRead(events[index].pin)] != events[index].state) {
      digitalWrite(events[index][2], events[index][3]);
      printflag = 1;
    }//end of conditional code
  }//end of for loop
  //end of event code
  if (printflag) printaction();
}//end loop

void printaction() {
  Serial.print(Month);
  Serial.print("/");
  Serial.print(Day);
  Serial.print("  ");
  Serial.print(Hour);
  Serial.print(":");
  Serial.print(Minute);
  Serial.print(":");
  Serial.print(Second);
  Serial.print("  A-");
  Serial.print(digitalRead(ValveA));
  Serial.print("  B-");
  Serial.print(digitalRead(ValveB));
  Serial.print("  Pmp-");
  Serial.print(digitalRead(PumpRly));
  Serial.print("  Lvl-");
  Serial.print(voltage);
  Serial.println();
}//end printaction