<?php

class drink
{
    private $alcool = '';
    private $pourcent = 0;

    public function __construct($alcool, $pourcent)
    {
        $this->alcool = $alcool;
                $this->pourcent = $pourcent;
    }

    public function __toString()
    {
        return $this->alcool . ': ' . $this->pourcent . '%';
    }

    public function getPourcent()
    {
        return $this->pourcent;
    }

    public function getAlcool()
    {
        return $this->alcool;
    }
}

class drinks implements iteratorAggregate
{
    private $drinks = array();

    public function destroy()
    {
        $this->drinks = array();
    }

    public function add(drink $drink)
    {
        $this->drinks[] = $drink;

        return $this;
    }

    public function getIterator()
    {
        return new arrayIterator($this->drinks);
    }
}

class order
{
    private $numberOfDrinks = 0;
    private $alcool = '';
        private $isPaid = false;

        public function __construct($numberOfDrinks, $alcool)
    {
        $this->numberOfDrinks = $numberOfDrinks;
        $this->alcool = $alcool;
    }

    public function increaseNumberOfDrinks()
    {
        $this->numberOfDrinks++;

        return $this;
    }

    public function getNumberOfDrinks()
    {
        return $this->numberOfDrinks;
    }

    public function getAlcool()
    {
        return $this->alcool;
    }

        public function getPrice()
        {
            return $this->numberOfDrinks * 6;
        }

        public function isPaid()
        {
            return $this->isPaid;
        }

        public function setPaid($boolean)
        {
            $this->isPaid = $boolean;
            return $this;
        }
}

class client
{
    private $drinks = array();
    private $creditCardNumber = '';

    public function __construct()
    {
        $this->creditCardNumber = uniqid();
    }

    public function order($numberOfDrinks, $alcool)
    {
                return new order($numberOfDrinks, $alcool);
    }

    public function receiveDrinks(drinks $drinks)
    {
        foreach($drinks as $drink )
                {
                    $this->drinks[] = $drink;
                }

        return $this;
    }

    public function getCreditCardNumber()
    {
        return $this->creditCardNumber;
    }

    public function showDrinks()
    {
        foreach ($this->drinks as $drink)
        {
            echo $drink . PHP_EOL;
        }

        return $this;
    }
}

class tpe
{
    private $creditCardNumber = '';
    private $price = 0;

    public function setCreditCardNumber($creditCardNumber)
    {
        $this->creditCardNumber = $creditCardNumber;

        return $this;
    }

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

        return $this;
    }

    public function executeTransaction(order $order)
    {
        echo 'Just pay ' . $order->getPrice() . ' with card ' . $this->creditCardNumber . '!' . PHP_EOL;
                $order->setPaid(true);

        return $this;
    }
}

class barman
{
    private $order = null;
    private $drinks = null;

    public function receiveOrder(order $order)
    {
                if( $this->order && !$this->order->isPaid())
                {
                    throw new \RuntimeException('Je dois en premier me faire payer la commande en court');
                }

        $this->order = $order;

        return $this;
    }

    public function prepareOrder()
    {
        $this->drinks = new drinks();

        for ($numberOfDrinks = $this->order->getNumberOfDrinks(); $numberOfDrinks > 0; $numberOfDrinks--)
        {
            $this->drinks->add(new drink($this->order->getAlcool(), 75));
        }

        return $this;
    }

    public function giveDrinks()
    {
            // le barman ne les a plus donc on les lui retire
        $drinks = $this->drinks;
                $this->drinks = null;
                return $drinks;
    }

    public function billDrinks($client)
    {
        $tpe = new tpe();

        $tpe
            ->setCreditCardNumber($client->getCreditCardNumber())
            ->executeTransaction($this->order)
        ;

        return $this;
    }
}

$me = new client();
$barman = new barman();

$barman
    ->receiveOrder($me->order(5, 'Chimay bleu'))
    ->prepareOrder()
;
$me->receiveDrinks($barman->giveDrinks());

$barman->billDrinks($me);
$me->showDrinks();