import java.util.Scanner;
import java.util.ArrayList;
import java.io.*;

/**
 * Shop.java
 * 
 * Uses the Item class to create items and add them to a shopping
 * cart stored in an ArrayList.
 * 
 * ACIT1515, Fall 2011, Lab 7
 * David Tran a00801942
 * 
 */

public class Shop {

    public static void main(String[] args) throws IOException{
        Item item;
        ArrayList <String> cart = new ArrayList<String>();
        Scanner scan = new Scanner(System.in);
        Scanner fileScan, lineScan;
        String fileName, itemName;
        double cartTotal = 0;
        
        System.out.println("==================================================");
        System.out.println("||---------Smart Shoppers Shopping System-------||");
        System.out.println("==================================================");
        System.out.println();
        System.out.print("Enter your shopping list: ");
        fileName = scan.nextLine();
        fileScan = new Scanner(new File(fileName));
        do {
            double itemPrice = 0;
            int itemQuantity = 0;
            String itemInfo = "";
            itemInfo = fileScan.nextLine();
            lineScan = new Scanner(itemInfo);
            lineScan.useDelimiter(",");
            // using the comma as the delimiter to seperate name, price and quantity.
            
            itemName = lineScan.next();
            // lets the first set of string variables up to the first comma to 
            // be the name of the item
            
            while(lineScan.hasNext()){
                itemPrice = lineScan.nextDouble();
                itemQuantity = lineScan.nextInt();
                
                cartTotal += (itemPrice*itemQuantity);
                // accumulatively adds up the total amount of each item's price
                // multiplied by their quantity
                item = new Item(itemName, itemPrice, itemQuantity);
                cart.add(item.toString());
                // calling the ArrayList function to add the toString method of
                // each item into the cells of the List.
                System.out.println(item.toString());
                // Also prints out the toString of the item class.
            }
        } while (fileScan.hasNextLine());
        
        double cutoff = 0;
        // let the cutoff equal zero, and do the following whenever the cutoff 
        // is never equal to zero. If the cutoff is zero, there is no need to
        // remove any more items that cost more than the cutoff.
        do{
            if (cutoff > 0){
                // if it is greater than zero, do this. 
                
                // No such thing is negative currency
                // unless we owe customers money. In this program, we do not
                // do refunds.
                
                Scanner fileScan2 = new Scanner(new File(fileName));
                // do a new file scan of our shopping list
                cartTotal = 0;
                // reset the total amount owed to zero.
                cart.clear();
                // clear all contents of the array.
                do {
                    
                    double itemPrice = 0;
                    int itemQuantity = 0;
                    String itemInfo = "";
                    itemInfo = fileScan2.nextLine();
                    lineScan = new Scanner(itemInfo);
                    lineScan.useDelimiter(",");

                    itemName = lineScan.next();

                    while(lineScan.hasNext()){
                        itemPrice = lineScan.nextDouble();
                        if (itemPrice > cutoff){
                            // if the price of the item is greater than the 
                            // cutoff point, terminate. Otherwise, continue.
                            break;
                        }
                        else {
                            itemQuantity = lineScan.nextInt();
                            cartTotal += (itemPrice*itemQuantity);
                            item = new Item(itemName, itemPrice, itemQuantity);
                            cart.add(item.toString());
                            System.out.println(item.toString());
                        }
                    }

                } while (fileScan2.hasNextLine());

                System.out.println();
                System.out.println("Your Shopping Cart:");
                System.out.println();
                // System.out.println(cart.toString());
                    // Above looks ugly, trying a different method
                int index = 0;
                while (index < cart.size()){
                    System.out.println(cart.get(index));
                    index++;
                }
                System.out.println("-------------------------------------------------");
                System.out.println("Your total: $" + cartTotal);
                System.out.println();
                System.out.print("Cutoff Price for Cart: ");
                cutoff = scan.nextDouble();
                System.out.println();
                // continue doing this until the customer is satisfied with the
                // cutoff point of their shopping list.
            } 
            else{
                System.out.println();
                System.out.println("Your Shopping Cart:");
                System.out.println();
                // System.out.println(cart.toString());
                    // Above looks ugly, trying a different method
                int index = 0;
                while (index < cart.size()){
                    System.out.println(cart.get(index));
                    index++;
                }
                System.out.println("-------------------------------------------------");
                System.out.println("Your total: $" + cartTotal);
                System.out.println();
                System.out.print("Cutoff Price for Cart: ");
                cutoff = scan.nextDouble();
                System.out.println();
            }
        } while (cutoff != 0);
    }
}