unsigned long clickAmount;
unsigned long money;
unsigned long priceFirstUpgrade = 10;
unsigned long priceSecondUpgrade = 100;
unsigned long priceThirdUpgrade = 1000;
unsigned long priceFourthUpgrade = 10000;
unsigned long priceAutoUpgradeOne = 50000;
unsigned long priceAutoUpgradeTwo = 500000;
unsigned long priceCooldownUpgrade = 500;
unsigned long moneyPerClick = 1;
unsigned long autoMoney;
unsigned long totalMoney;
unsigned long cooldown = 500;
float priceModifier = 1.25;
float cooldownModifier = 0.8;
unsigned long resetModifier = 1;
unsigned long resetValue = 2500000;

void Initialize() {
  // Initializes game and lets the player know what is happening
  Serial.print("Cost of Upgrade 1 is: ");
  Serial.print(priceFirstUpgrade);
  Serial.println(", It gives +1 money per click.");
  Serial.print("Cost of Upgrade 2 is: ");
  Serial.print(priceSecondUpgrade);
  Serial.println(", It gives +10 money per click.");
  Serial.print("Cost of Upgrade 3 is: ");
  Serial.print(priceThirdUpgrade);
  Serial.println(", It gives +100 money per click.");
  Serial.print("Cost of Upgrade 4 is: ");
  Serial.print(priceFourthUpgrade);
  Serial.println(", It gives +1000 money per click.");
  Serial.print("Cost of Auto Upgrade 1 is: ");
  Serial.print(priceAutoUpgradeOne);
  Serial.println(", It autogenerates 1 money at very fast rates.");
  Serial.print("Cost of Auto Upgrade 2 is: ");
  Serial.print(priceAutoUpgradeTwo);
  Serial.println(", It autogenerates 5 money at very fast rates.");
  Serial.print("Cost of Cooldown Upgrade is: ");
  Serial.print(priceCooldownUpgrade);
  Serial.println(", It lowers your cooldown by 20%.");
  Serial.println("The button that gives you money is yellow."); 
  Serial.println("The red button shows you your stats.");
  Serial.println("The click upgrades are black buttons."); 
  Serial.println("The cooldown upgrade button is the blue button.");
  Serial.println("The auto-generation upgrades are green buttons.");
  Serial.println("The reset button is grey (it resets the game and adds a reset modifier).");
  Serial.print("You can reset at ");
  Serial.print(resetValue);
  Serial.println(" money, this adds a modifier to your money, and the amount of money you need to reset gets bigger.");
  Serial.println("Game begins");
  delay(500);
  Serial.println("NOW");
}

void setup() {
  Serial.begin(9600);
  pinMode(13, INPUT_PULLUP);
  pinMode(2, INPUT_PULLUP);
  pinMode(3, INPUT_PULLUP);
  pinMode(4, INPUT_PULLUP); 
  pinMode(5, INPUT_PULLUP);
  pinMode(6, INPUT_PULLUP);
  pinMode(7, INPUT_PULLUP);
  pinMode(8, INPUT_PULLUP);
  pinMode(9, INPUT_PULLUP);
  pinMode(10, INPUT_PULLUP);
  Initialize();
}

void loop() {
  //money per click, click detection, and auto-money
  if (digitalRead(13) == LOW) {
    money += moneyPerClick*resetModifier;
    totalMoney += moneyPerClick*resetModifier;
    clickAmount++;
    Serial.print("money: ");
    Serial.println(money);
    delay(cooldown);
  }
  money += autoMoney*resetModifier;
  totalMoney += autoMoney*resetModifier;

  // Upgrade 1
  if (money >= priceFirstUpgrade && digitalRead(2) == LOW) {
    moneyPerClick += 1;
    money -= priceFirstUpgrade;
    priceFirstUpgrade = priceModifier*priceFirstUpgrade;
    Serial.print("Cost of Upgrade 1 is now: "); 
    Serial.println(priceFirstUpgrade);
    delay(500);
  } else if (digitalRead(2) == LOW && money < priceFirstUpgrade) {
    Serial.println("not enough money");
    delay(200);
  }

  // Upgrade 2
  if (money >= priceSecondUpgrade && digitalRead(3) == LOW) {
    moneyPerClick += 5;
    money -= priceSecondUpgrade;
    priceSecondUpgrade = priceModifier*priceSecondUpgrade;
    Serial.print("Cost of Upgrade 2 is now: "); 
    Serial.println(priceSecondUpgrade);
    delay(500);
  } else if (digitalRead(3) == LOW && money < priceSecondUpgrade) {
    Serial.println("not enough money");
    delay(200);
  }

  // Upgrade 3
  if (money >= priceThirdUpgrade && digitalRead(4) == LOW) {
    moneyPerClick += 100;
    money -= priceThirdUpgrade;
    priceThirdUpgrade = priceModifier*priceThirdUpgrade;
    Serial.print("Cost of Upgrade 3 is now: "); 
    Serial.println(priceThirdUpgrade);
    delay(500);
  } else if (digitalRead(4) == LOW && money < priceThirdUpgrade) {
    Serial.println("not enough money");
    delay(200);
  }

  // Upgrade 4
  if (money >= priceFourthUpgrade && digitalRead(8) == LOW) {
    moneyPerClick += 1000;
    money -= priceFourthUpgrade;
    priceFourthUpgrade = priceModifier*priceFourthUpgrade;
    Serial.print("Cost of Upgrade 4 is now: "); 
    Serial.println(priceFourthUpgrade);
    delay(500);
  } else if (digitalRead(8) == LOW && money < priceFourthUpgrade) {
    Serial.println("not enough money");
    delay(200);
  }

  // Auto Upgrade 1
  if (money >= priceAutoUpgradeOne && digitalRead(5) == LOW) {
    autoMoney += 1;
    money -= priceAutoUpgradeOne;
    priceAutoUpgradeOne = priceModifier*priceAutoUpgradeOne;
    Serial.print("Cost of Auto Upgrade 1 is now: "); 
    Serial.println(priceAutoUpgradeOne);
    delay(500);
  } else if (digitalRead(5) == LOW && money < priceAutoUpgradeOne) {
    Serial.println("not enough money");
    delay(200);
  }

  // Auto Upgrade 2
  if (money >= priceAutoUpgradeTwo && digitalRead(6) == LOW) {
    autoMoney += 5;
    money -= priceAutoUpgradeTwo;
    priceAutoUpgradeTwo = priceModifier*priceAutoUpgradeTwo;
    Serial.print("Cost of Auto Upgrade 2 is now: "); 
    Serial.println(priceAutoUpgradeTwo);
    delay(500);
  } else if (digitalRead(6) == LOW && money < priceAutoUpgradeTwo) {
    Serial.println("not enough money");
    delay(200);
  }

  // Cooldown Upgrade
  if (money >= priceCooldownUpgrade && digitalRead(9) == LOW) {
    cooldown = cooldown*cooldownModifier;
    money -= priceCooldownUpgrade;
    priceCooldownUpgrade = priceModifier*priceCooldownUpgrade;
    Serial.print("Cost of Cooldown Upgrade is now: "); 
    Serial.println(priceCooldownUpgrade);
  } else if (digitalRead(9) == LOW && money < priceCooldownUpgrade) {
    delay(500);
    Serial.println("not enough money");
    delay(200);
  }  

  // Stats
  if (digitalRead(7) == LOW) {
    Serial.print("total money made: ");
    Serial.println(totalMoney);
    Serial.print("total clicks: ");
    Serial.println(clickAmount);
    Serial.print("speed of money autogeneration: ");
    Serial.println(autoMoney);
    Serial.print("money generated each click: ");
    Serial.println(moneyPerClick);
    Serial.print("cooldown time (in milliseconds): ");
    Serial.println(cooldown);
    delay(2000);
  }

  // Victory Condition, can be changed (if changed, remember to change that part in the initialize)
  if (money >= resetValue && digitalRead(10) == LOW) {
    resetValue = 1.9*resetValue;
    resetModifier = 2*resetModifier;
    Serial.println("YOU WIN!");
    Serial.print("The reset value needed is now: ");
    Serial.println(resetValue);
    Serial.print("The reset modifier is now: ");
    Serial.println(resetModifier);
    Serial.println("Resetting in");
    Serial.println("3");
    delay(1000);
    Serial.println("2");
    delay(1000);
    Serial.println("1");
    delay(1000);
    Serial.println("RESET");
    delay(200);
    money = 0;
    moneyPerClick = 1;
    autoMoney = 0;
  }
}