// https://wokwi.com/projects/419072038170188801

# include <ezButton.h>

int balance;

// water - do we want it? is it aready running?
bool wantsWater;
bool isWatering;

const byte waterRequest = 6;
const byte waterControl = 7;

ezButton coinButton(2), waterButton(3);

unsigned long now;    // the time. always.

void setup() {
  Serial.begin(115200);
  Serial.println("no free water.\n");

  coinButton.setDebounceTime(20);
  waterButton.setDebounceTime(20);

  pinMode(waterControl, OUTPUT);
  pinMode(waterRequest, OUTPUT);
}


// loop calls the version we are working on, which should alway run
// each subsequent version builds on success

void loop()
{
  loop3();
}

void loop3() {

  now = millis();

  static int printedBalance = -1;
  if (printedBalance != balance) {
    Serial.print("balance = ");
    Serial.println(balance);

    printedBalance = balance;
  }

  if (isWatering) {
    static unsigned long lastDebit;
    if (now - lastDebit > 777) {
      balance -= 3;
      if (balance < 0) {
        balance = 0;  // well, there is some lefover money
        Serial.println(".        INSERT MORE COINS");
        wantsWater = false; // who cares what this deadbeat wants?
        isWatering = false;
      }

      lastDebit = now;
    }
  }

// input. let ezButton have a lok at the buttons
  coinButton.loop();
  waterButton.loop();
  
  if (coinButton.isPressed()) {
    balance += 10;
  }

  bool waterInput = waterButton.isPressed();

  if (waterInput) {
    if (isWatering) {
      wantsWater = !wantsWater;
    }
    else {
      if (balance) {
        wantsWater = true;
        isWatering = true;
      }
      else {
        wantsWater = false;
        Serial.println("INSERT COINS");
      }
    }
  }

  isWatering = wantsWater;

// OUTPUT adjust status LEDs and turn on or off the water
  digitalWrite(waterRequest, wantsWater ? HIGH : LOW);
  digitalWrite(waterControl, isWatering);
}

void loop2() {

  now = millis();

  static int printedBalance = -1;
  if (printedBalance != balance) {
    Serial.print("balance = ");
    Serial.println(balance);

    printedBalance = balance;
  }

// input. let ezButton have a lok at the buttons
  coinButton.loop();
  waterButton.loop();
  
  if (coinButton.isPressed()) {
    balance += 10;
  }

  bool waterInput = waterButton.isPressed();

  if (waterInput) {
    if (isWatering) {
      wantsWater = !wantsWater;
    }
    else {
      if (balance) {
        wantsWater = true;
        isWatering = true;
      }
      else {
        wantsWater = false;
        Serial.println("INSERT COINS");
      }
    }
  }

  isWatering = wantsWater;

// OUTPUT adjust status LEDs and turn on or off the water
  digitalWrite(waterRequest, wantsWater ? HIGH : LOW);
  digitalWrite(waterControl, isWatering);
}

void loop1() {

  now = millis();

  static int printedBalance = -1;
  if (printedBalance != balance) {
    Serial.print("balance = ");
    Serial.println(balance);

    printedBalance = balance;
  }

// input. let ezButton have a lok at the buttons
  coinButton.loop();
  waterButton.loop();
  
  if (coinButton.isPressed()) {
    balance += 10;
  }

  if (waterButton.isPressed())
    wantsWater = !wantsWater;


// OUTPUT adjust status LEDs and turn on or off the water
  digitalWrite(waterRequest, wantsWater ? HIGH : LOW);
}

void loop0() {

  now = millis();

  static int printedBalance = -1;
  if (printedBalance != balance) {
    Serial.print("balance = ");
    Serial.println(balance);

    printedBalance = balance;
  }

// input. let ezButton have a lok at the buttons
  coinButton.loop();
  waterButton.loop();
  
  if (coinButton.isPressed()) {
    balance += 10;
  }
}