package models;

import java.util.ArrayList;

public class Cart {
    ArrayList<Item> items;

    public Cart() {
        this.items = new ArrayList<Item>();
    }

    public Item getItem(int index) {
        return new Item(this.items.get(index));
    }

    public void setItem(int index, Item item) {
        this.items.set(index, new Item(item));
    }


   /**
    * Name: add
    * @param item
    * @return boolean
    *
    * Inside the function:
    *   1. Adds an item to the cart if it wasn't already added.
    */

    public boolean add(Item item) {
        if (this.items.contains(item)) {
            return false;
        }
        this.items.add(new Item(item));
        return true;
    } 
  
   /**
    * Name: remove
    * @param name
    *
    * Inside the function:
    *   1. Removes the item that matches the name passed in.
    */

    public void remove(String name) {
        if (items.isEmpty()) {
            throw new IllegalStateException("cannot remove from an empty cart");
        }
        for (int i = 0; i < items.size(); i++) {
            if (items.get(i).getName().equals(name)) {
                this.items.remove(i);
            }
        }
    }

 
 
  
   /**
    *  Name: checkout
    *  @return (String)
    *
    *  Inside the function:
    *   1. Calculates the subtotal (price before tax).
    *   2. Calculates the tax (assume tax is 13%).
    *   3. Calculates total: subtotal + tax
    *   4. Returns a String that resembles a receipt. See below.
    */

    public String checkout() {
        if (items.isEmpty()) {
            throw new IllegalStateException("cannot checkout an empty cart");
        }

        double[] measures = new double[3];
        for (int i = 0; i < this.items.size(); i++) {
            measures[0] += this.items.get(i).getPrice();
        }
        measures[1] = measures[0] * 0.13;
        measures[2] = measures[0] + measures[1];

        return "\tRECEIPT\n\n" +
        "\tSubtotal: $" + measures[0] + "\n" +
        "\tTax: $" + measures[1] + "\n" +
        "\tTotal: $" + measures[2] + "\n";

    }

    public boolean isEmpty() {
        return this.items.isEmpty();
    }

    public String toString() {
        String temp = "";
        for (int i = 0; i < this.items.size(); i++) {
            temp += this.items.get(i).toString();
            temp += "\n";
        }
        return temp;
    }

}