// Clay Shields
// Solution for 071 Project 1
// Clyde's Carryout Cupcakes


#include<iostream>
#include<iomanip>
using namespace std;

// Start
int main() {

  // define constants for things that won't change value
  const float cupcake_cost = 2.75;
  const float dozen_cost = 30.0;
  const float sprinkles_cost = 0.35;
  const float discount_rate = 0.15;
  const float tax_rate = 0.10;

  // Make space to hold the order amount
  int number_cupcakes_ordered = 0;
  int number_sprinkles_ordered = 0;
  int dozens_of_cupcakes_count = 0;
  int individual_cupcake_count = 0;

  // Variables for costs
  float cost_of_dozens = 0;
  float cost_of_individuals = 0;
  float cost_of_sprinkles = 0;
  float order_total = 0;
  float tax = 0;
  float discount = 0;
  float total_with_discount = 0;
  float total_with_tax_and_discount = 0;
  
  // inputs for discount and taxes
  char discount_status_in;
  char tax_status_in;
  bool get_discount = false;
  bool pay_taxes = false;

  // Say what the program does
  cout << "Welcome to Clyde's Carryout Cupcakes!" << endl;
  cout << "Please enter the following information:" << endl << endl;

  // Get user input for what they are buying
  cout << "Enter the number of cupcakes purchased: ";
  cin >> number_cupcakes_ordered;
  
  // Make sure that the input makes sense
  if (number_cupcakes_ordered <= 0) {
    cout << "An order with zero cupcakes is free!" << endl;
    exit (0);
  }

  if (number_cupcakes_ordered > 1200){
    cout << "I'm sorry, we don't make that many cupcakes." << endl;
    exit (0);
  }

  // Get user input for number of sprinkles
  cout << "How many cupcakes had sprinkles: ";
  cin >> number_sprinkles_ordered;

  // Make sure that the input makes sense
  if (number_sprinkles_ordered < 0) {
    cout << "You can't have a negative number of sprinkles." << endl;
    exit (0);
  }

  if (number_sprinkles_ordered > number_cupcakes_ordered) {
    cout << "You can't have more sprinkles than cupcakes." << endl;
    exit (0);
  }

  // Calculate the number of dozens and the leftovers
  dozens_of_cupcakes_count = number_cupcakes_ordered / 12;
  individual_cupcake_count = number_cupcakes_ordered % 12;

  // Figure out the costs of the order
  cost_of_dozens = dozens_of_cupcakes_count * dozen_cost;
  cost_of_individuals = individual_cupcake_count * cupcake_cost;
  cost_of_sprinkles = number_sprinkles_ordered * sprinkles_cost;
  order_total = cost_of_dozens + cost_of_individuals + cost_of_sprinkles;

  // Ask if there is a discount
  cout << "Was this order placed before 11:45 (y/n)? ";
  cin >> discount_status_in;
  if ((discount_status_in != 'y')&&(discount_status_in != 'Y')&&
      (discount_status_in != 'n')&&(discount_status_in != 'N')){
    cout << "Invalid entry. Please run the program again." << endl;
    exit (1);
  }
  else {
    if ((discount_status_in == 'y')||(discount_status_in == 'Y')){
      get_discount = true;
    }
    else {
      get_discount = false;
    }
  }  

  // Calculate discount
  if (get_discount) {
    discount = order_total * discount_rate;
  }
  else {
    discount = 0;
  }
  total_with_discount = order_total - discount;

  // Ask if the order is tax exempt
  cout << "Is this order tax exempt, such as a GU official purchase (y/n)? ";
  cin >> tax_status_in;
  if ((tax_status_in != 'y')&&(tax_status_in != 'Y')&&
      (tax_status_in != 'n')&&(tax_status_in != 'N')){
    cout << "Invalid entry. Please run the program again." << endl;
    exit (1);
  }
  else {
    if ((tax_status_in == 'y')||(tax_status_in == 'Y')){
      pay_taxes = false;
    }
    else {
      pay_taxes = true;
    }
  }  
  cout << endl << endl;

  
  // Calculate taxes
  if (pay_taxes){
    tax = total_with_discount * tax_rate;
  }
  else {
    tax = 0;
  }
  
  total_with_tax_and_discount = total_with_discount + tax;

  // Make some nicely formatted output
  cout << fixed << setprecision(2) << endl << endl;

  cout << "Clyde's Carryout Cupcakes - Thanks for your order!" << endl;
  if (dozens_of_cupcakes_count != 0) {
    cout << setw(25) << "Dozens ordered: " << setw(5) << dozens_of_cupcakes_count << " @ $" 
	 << cost_of_dozens << endl;
  }

  if (individual_cupcake_count != 0){
    cout << setw(25) << "Individual cupcakes: " << setw(5) <<  individual_cupcake_count << " @ $" 
	 << cost_of_individuals << endl;
  }

  if (number_sprinkles_ordered != 0){
    cout << setw(25) << "Cupcake sprinkles: " << setw(5) << number_sprinkles_ordered << " @ $" 
	 << cost_of_sprinkles << endl;
  }
  
  cout << setw(25) << "Subtotal: " << setw(9) << "$" << order_total << endl << endl;

  if (get_discount) {
    cout << setw(25) << "Early bird discount: " << setw(9) << "-$" << discount << endl;
    cout << setw(25) << "Subtotal with discount: " << setw(9) << "$" 
	 <<  total_with_discount << endl;
  }

  cout << setw(25) << "Tax: "  << setw(9) << "$" <<  tax << endl << endl;

  cout << setw(25) << "Please pay: " << setw(9)  << "$" << total_with_tax_and_discount << endl;
  
  // end
  return 0;
}