/*
     Lab 1
     CS2
     Updated by: Tommy Weber (5 points) - fixed
     Date: 1/18/2019 (5 points) - fixed

     Breakfast billing system for a restaurant.

     This program allows restaurant customers to select breakfast items and prints the bill.


Problem Requirements
  - Write a C++ program to help a local restaurant automate its breakfast billing system. The program should do the following at a minimum.

  - Program should read the menu data from file menu.txt, sample is provided to you.
  - Show customer the different breakfast items offered by the restaurant.
  - Allow customer to select more than one item from the menu.
  - Do not allow customer to select the same item more than once.
  - When done selecting items, prompt user to enter filename and save the receipt in the output file as shown in the given guest1.check sample file.
  - Bonus 10 points.  Make the program run continuously, until the user wants to quit.


Follow best programming practices:
  - Write adequate comments. Comments can help you plan for the solution and think through the problem.
  - Refrain from using global variables; constants are okay.
  - Use adequate indentation and whitespaces to cleanly format your code.

Submission:
If your program doesn’t compile, you’ll get a zero for this lab.
Add all the source file(s) *.cpp, *.h, etc., sample input and output files into the repository
$ git status
$ git add … - add each file that was new or modified that is part of the lab
$ git commit -m “Final Submission”
$ git push
NOTE: Do not modify this folder contents after the due date as it may be considered late submission!

===================================================================================
*/

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>

using namespace std;

// max no. of menu items that can be stored by the program
const int NO_OF_ITEMS = 8;

// data structure to hold each menu item info
struct menuItemType
{
    string itemName;
    double itemPrice;
};

// initialize menu list with some default values
void initMenuList(menuItemType menuList[], int menuListSize);
// function that reads menu data into menuList array
void readMenuData(ifstream& fin, menuItemType menuList[], int menuListSize);
// function that displays the menu
void showMenu(menuItemType menuList[], int menuListSize);
// function to print check after menu items are selected
void printCheck(menuItemType menuList[], int menuListSize,
    int selectedList[], int selectedListLength);
// function to select items from the menu list
void makeSelection(menuItemType menuList[], int menuListSize,
    int selectedList[], int& selectedListLength);
// function that returns true if the itemNo is in the selectedList otherwise false.
// this function avoids user repeating the menu item
bool isItemSelected(int selectedList[], int selectedListLength, int itemNo);

int main()
{
    menuItemType menuList[NO_OF_ITEMS];
    int choiceList[NO_OF_ITEMS]; // array to keep track of choices based on item number
    int choiceListLength; // variable to keep track of no. of choices
    ifstream fin;
    cout << fixed << showpoint << setprecision(2);
    // open menu.txt file to read menu data from
    string menuFileName = "menu.txt";
    fin.open(menuFileName);
    if (!fin)
    {
        cout << "Input file " << menuFileName << " does not exist. Program Terminates!"
            << endl;
        cout << "Hit enter to terminate the program!";
        cin.get();
        return 1;
    }
    initMenuList(menuList, NO_OF_ITEMS);
    // FIXME3 – (5 points) - fixed
    // Call readMenuData function passing proper arguments
    readMenuData(fin, menuList, NO_OF_ITEMS);

    fin.close(); //close input file
    showMenu(menuList, NO_OF_ITEMS);
    makeSelection(menuList, NO_OF_ITEMS, choiceList, choiceListLength);
    printCheck(menuList, NO_OF_ITEMS, choiceList, choiceListLength);
    // pause the program until a key is entered
    cin.get();
    cin.get();
    return 0;
}

void initMenuList(menuItemType menuList[], int menuListSize)
{
    int itemNameCount = 0, itemPriceCount = 1; // Will help assign items in menuList to both .itemName & .itemPrice
    const int MAX = (menuListSize*2);
    string fullMenuList[MAX] = {"Plain Egg", "0", "Bacon and Egg", "0", "Muffin", "0", "French Toast", "0",
                                "Fruit Basket", "0", "Cereal", "0", "Coffee", "0", "Tea", "0"};
    // Assigns values to items in class.
    for (int i = 0; i < menuListSize; ++i)
{
        // FIXME4 (5 points) - fixed
        // Initialize each menu item's name to A Tasty Item (DONE)
        // Initialize each menu item's price to 0; (DONE)
        menuList[i].itemName = fullMenuList[itemNameCount];
        menuList[i].itemPrice = stod( fullMenuList[itemPriceCount] );

        //cout << "Debug #38571: " << menuList[i].itemName << "    " << menuList[i].itemPrice << "\n";
        itemNameCount += 2;
        itemPriceCount += 2;
    }
}

void readMenuData(ifstream& fin, menuItemType menuList[], int menuListSize)
{
    char ch;
    for (int i = 0; i < menuListSize; i++)
    {
        // FIXME5 (10 points) - WIP
        // 1. Read each item name into itemName field of menuList array
        // 2. Read each item price into itemPrice field of menuList array
        //cout << menuList[i].itemName << "\n";

    }
}

void showMenu(menuItemType menuList[], int menuListSize)
{
    cout << "Welcome to Papi Joey's Kitchen" << endl;
    cout << "----Today's Menu----" << endl;

    for (int i = 0; i < menuListSize; i++)
    {
        cout << i + 1 << ": " << left << setw(15) << menuList[i].itemName
            << right << " $" << menuList[i].itemPrice << endl;
    }
    cout << endl;
}

void printCheck(menuItemType menuList[], int menuListSize,
                int selectedList[], int selectedListLength)
{
    int i;
    double salesTax;
    double amountDue = 0;

    cout << "   Papi Joey's Kitchen" << endl;
    cout << "       Guest Check    " << endl;
    cout << setw(25) << setfill('=') << endl;
    cout << setfill(' ') << endl;
    for (i = 0; i < selectedListLength; i++)
    {
        cout << left << setw(15) << menuList[selectedList[i]].itemName
            << right << " $" << setw(4) << menuList[selectedList[i]].itemPrice << endl;
        amountDue += menuList[selectedList[i]].itemPrice;
    }
    cout << endl;
    salesTax = amountDue * .07;
    cout << left << setw(15) << "Tax " << right << " $"
        << salesTax << endl;
    amountDue = amountDue + salesTax;
    cout << left << setw(15) << "Amount Due " << right
        << " $" << amountDue << endl << endl;
    cout << setw(25) << setfill('=') << ' ' << endl;
    cout << setfill(' ') << endl;
    cout << "     Thank you! " << endl;
    // FIXME6 (10 points)
    // 1. Prompt user to enter output filename to write receipt data.
    // 2. Create the file and write the check info (as you see on the common output) into the file.
    // 3. Provide feedback to the user, once done.
    // 4. Close the file.
}

void makeSelection(menuItemType menuList[], int menuListSize, int selectedList[],
 int& selectedListLength)
{
    int selectionNo = 0;
    int itemNo;
    char response;
    selectedListLength = 0;

    cout << "You can make up to " << menuListSize
        << " single order selections" << endl;

    cout << "Do you want to make selection Y/y (Yes), N/n (No): ";
    cin >> response;
    cout << endl;

    while ((response == 'Y' || response == 'y') &&
        selectedListLength < menuListSize)
    {
        cout << "Enter item number: ";
        cin >> itemNo;
        cout << endl;

        if (!isItemSelected(selectedList, selectedListLength, itemNo))
            selectedList[selectedListLength++] = itemNo - 1;
        else
            cout << "Item already selected" << endl;

        cout << "Select another item Y/y (Yes), N/n (No): ";
        cin >> response;
        cout << endl;
    }
}

bool isItemSelected(int selectedList[], int selectedListLength, int itemNo)
{
    bool found = false;
    /*
    FIXME7 (10 points)
    Algorithm steps:
    1. Go through each item in selectedList and check if itemNo is in there.
    2. If it is, return true, otherwise false
    */
    return found;

}