<?php
  include('config.php');
  include('helper.php');

  if (isset($_POST['langchange'])) {
    $lang = null !== $_COOKIE['lang'] && $_COOKIE['lang'] == 'en' ? 'ja' : 'en';
    setcookie('lang', $lang);
    unset($_POST['langchange']);
    header('Location: /');
  }

  if (isset($_POST['addtocart'])) {
    $cart = null !== $_COOKIE['cart'] ? $_COOKIE['cart'] : '';
    $cart .= $_POST['item'].',';
    setcookie('cart', $cart);
    unset($_POST['item']);
    unset($_POST['addtocart']);
    header('Location: /cart.php');
  }

  if (isset($_POST['cart-minus'])) {
    $cart = null !== $_COOKIE['cart'] ? $_COOKIE['cart'] : '';
    $cart = array_filter(explode(',', $cart));
    foreach ($cart as $k => $v) {
      if ($v == $_POST['item']) { unset($cart[$k]); break; }
    }
    $cart = array_values($cart);
    $cart = implode(',', $cart).',';
    setcookie('cart', $cart);
    unset($_POST['item']);
    unset($_POST['cart-minus']);
    header('Location: /cart.php');
  }

  if (isset($_POST['cart-plus'])) {
    $cart = null !== $_COOKIE['cart'] ? $_COOKIE['cart'] : '';
    $cart .= $_POST['item'].',';
    setcookie('cart', $cart);
    unset($_POST['item']);
    unset($_POST['cart-minus']);
    header('Location: /cart.php');
  }

  $eigo = null !== $_COOKIE['lang'] && $_COOKIE['lang'] == 'en';
  $cart = null !== $_COOKIE['cart'] && $_COOKIE['cart'] != 0;
  $styles = ['style'];
?>