/*Tyler Taormina
 * Midterm challenge
 *
 * Description: For the midterm challenge I decided to build a simple calculator 
 * that displays an estimated yearly cost of dog food based on a few factors
 * that the user provides. These factors are the size of the dog and the type of
 * food that the owner would prefer to feed their dog. The two choices of dog 
 * food are 'organic' and 'regular'. Code and Run included. 
 *
 */


#include <iostream>
using namespace std;

int main();
void yearlyCost (int, float, float&, int);
void dogInfo(int&);
void foodInfo(int&);
void determine_servings(int, float&);
void bagsPerWeek (int, float, float&);
void display(float);   
int main() 
{
       
    int const WEEKS = 56; //weeks in a year
    int const DAYS = 7; //days per week
    int const SERVING_PER_BAG = 20;
    float const ORG=29.99, REG=19.99; 
    int dog=0;
    float day_servings=0;
    int foodType=0; 
    float weekly_portion=0.0;
    float cost=0.0;
    float total_cost=0.0;

    dogInfo(dog);
    determine_servings(dog, day_servings);
    foodInfo(foodType);
    bagsPerWeek(DAYS, day_servings, weekly_portion);
    yearlyCost(WEEKS, weekly_portion, total_cost, foodType);
    display(total_cost);

    return 0;
}

void dogInfo(int& dog) 
{
    cout << "\n\nThis program will help you determine the yearly cost of dog food." << endl;
    cout << "First, we will ask you a few questions!" << endl;
    cout << "******************************************************************\n\n" << endl;  
    cout << "What size dog do you have?\n\n" << endl;
    cout << "Press 1 for a small dog." << endl;
    cout << "Press 2 for a medium dog." << endl;
    cout << "Press 3 for a large dog." << endl;
    cout << "Press 4 if you are unsure." << endl;
    cin >> dog;
}

void foodInfo(int& foodType) 
{
    cout << "\n\nLets talk about Dog food for a moment." << endl;
    cout << "******************************************************************\n\n" << endl;
    cout << "What kind of dog food would you prefer. Organic or Original?\n\n" << endl;
    cout << "Enter 1 for Organic." << endl;
    cout << "Enter 2 for Original." << endl;
    cin >> foodType; 

    if (foodType > 2 || foodType < 1)
    {
        cout << "\n\nSorry. These are the only food choices we offer.\n";
        cout << "Please reenter your food choice.";
        foodInfo(foodType);
    }
}

void determine_servings(int dog, float& day_servings) 
{
    switch (dog) {
        // small dog
        case 1:
           day_servings = 1;
           break;
        
        case 2:
            day_servings = 1.5;
            break;

        case 3:
            day_servings = 2;
            break;

        case 4:
            cout << "\n\nGenerally a small dog is a dog that weighs under 20lbs.\n";
            cout << " A medium dog weighs anywhere from 20lbs to 50lbs and\n";
            cout << " a large dog would weigh over 50lbs. Hope this helps\n";
            cout << " in determining the correct size for your dog. Lets\n";
            cout << " try again!" << endl;
            main();

        default:
            cout << "WHOOPS! INVALID ENTRY. PLEASE TRY AGAIN." << endl;
            main();
    }
} 

 
void bagsPerWeek(int DAYS, float day_servings, float& weekly_portion)
{
    weekly_portion = (day_servings * DAYS) / 7;
}

void yearlyCost(int WEEKS, float weekly_portion, float& total_cost, int foodType)
{
    float yearly_bags = 0.0;
    float const ORG=29.99, REG=19.99;

    yearly_bags = weekly_portion * WEEKS;

    if (foodType == 1)
        total_cost = yearly_bags * ORG;
    else
        total_cost = yearly_bags * REG;

}

void display(float total_cost)
{
    cout << "\n\n\nBased on the information you have entered, here is what we came up with.\n\n\n";
    cout << "The estimated yearly cost of your dogs food is: $" << total_cost << endl;
    cout << "Remember that this is estimation is based upon veterinary recommendations" << endl;
    cout << "If your dog experiences any symptoms that you believe are related to diet,\n";
    cout << "immediately contact a veterinary clinic." << endl;
    cout << "Thanks for participating!" << endl;
}