<?php

/*
@author: Nguyen Truong Quy
@note: That's good enough :))

 */


/*
Task:
Write a basic eCommerce program in PHP that models a User, Product and ShoppingCart.
* Products have a name and price.
* Users have a name and email address, and associated ShoppingCart.
* ShoppingCarts have an associated User and list of Products.
* A User can add or remove a Product from their ShoppingCart.
* A ShoppingCart must be able to provide a total price for its list of Products.
The code must pass two tests:
1. Create a User "John Doe" with email address "john.doe@example.com", then add 2 "Apple" Products
for $4.95 each and 1 "Orange" Product for $3.99. Check that the ShoppingCart total price is correct.
2. Create a User "John Doe" with email address "john.doe@example.com", then add 3 "Apple" products
for $4.95, then remove 1 "Apple" product. Check that the ShoppingCart total price is correct.
You may either use PHPUnit to run the tests, or a simple PHP script which can be run via the command
line.
Notes:
* You should NOT use a full-featured framework (Laravel, CakePHP, etc), just plain PHP code.
* No database, user interaction or other functionality is required (so no HTML/CSS/JavaScript); it just
needs to be PHP code which runs and passes the tests.
*/

class Product {
    private $name;
    private $price;

    function getName() {
	return $this->name;
    }

    function setName($name) {
   	$this->name = $name;
    }

    function getPrice() {
	return $this->price;
    }

    function setPrice($price) {
   	$this->price = $price;
    }
}

class User {
    private $name;
    private $email;
    private $shoppingCart;

    function getName() {
	    return $this->name;
    }

    function setName($name) {
   	    $this->name = $name;
    }

    function getEmail() {
	    return $this->email;
    }

    function setEmail($email) {
   	    $this->email = $email;
    }

    function getShoppingCart() {
	    return $this->shoppingCart;
    }

    function setShoppingCart($shoppingCart) {
   	    $this->shoppingCart = $shoppingCart;
    }
}

class ShoppingCart {
    private $user;
    private $products = array();

    function getUser() {
	return $this->user;
    }

    function setUser($user) {
   	$this->user = $user;
    }

    function removeProduct($productName) {
        $i = 0;
    	foreach($this->products as $product) {
    	    if ($product->getName() == $productName) {
    		    unset($this->products[$i]);
    		    break;
            }
            $i++;
    	}
    }

    function addProduct($product) {
	    array_push($this->products, $product);
    }

    function getTotalPrice() {
    	$sum = 0;
    	foreach($this->products as $product) {
    		$sum = $sum + $product->getPrice();
        }
    	return $sum;
    }
}

/* 1. Create a User "John Doe" with email address "john.doe@example.com",
then add 2 "Apple" Products for $4.95 each and 1 "Orange" Product for $3.99.
Check  that the ShoppingCart total price is correct */

$user1 = new User();
$user1->setName("John Doe");
$user1->setEmail("john.doe@example.com");
$user1->setShoppingCart(new ShoppingCart());
$user1->getShoppingCart()->setUser($user1);

$apple1 = new Product();
$apple1->setName("Apple");
$apple1->setPrice(4.95);
$user1->getShoppingCart()->addProduct($apple1);

$apple2 = new Product();
$apple2->setName("Apple");
$apple2->setPrice(4.95);
$user1->getShoppingCart()->addProduct($apple2);

$orange = new Product();
$orange->setName("Orange");
$orange->setPrice(3.99);
$user1->getShoppingCart()->addProduct($orange);

echo $user1->getShoppingCart()->getTotalPrice(). "\n";

/* 2. Create a User "John Doe" with email address "john.doe@example.com", then add 3 "Apple" products
for $4.95, then remove 1 "Apple" product. Check that the ShoppingCart total price is correct. */

$user2 = new User();
$user2->setName("John Doe");
$user2->setEmail("john.doe@example.com");
$user2->setShoppingCart(new ShoppingCart());
$user2->getShoppingCart()->setUser($user2);

$apple1 = new Product();
$apple1->setName("Apple");
$apple1->setPrice(4.95);
$user2->getShoppingCart()->addProduct($apple1);

$apple2 = new Product();
$apple2->setName("Apple");
$apple2->setPrice(4.95);
$user2->getShoppingCart()->addProduct($apple2);

$apple3 = new Product();
$apple3->setName("Apple");
$apple3->setPrice(4.95);
$user2->getShoppingCart()->addProduct($apple3);

$apple4 = new Product();
$apple4->setName("Apple");
$user2->getShoppingCart()->removeProduct($apple4->getName());

echo $user2->getShoppingCart()->getTotalPrice();