<?php
/**
 * For the full copyright and license information, please view the
 * docs/licenses/LICENSE.txt file that was distributed with this source code.
 */

use Detection\MobileDetect;
use PrestaShop\PrestaShop\Adapter\ContainerFinder;
use PrestaShop\PrestaShop\Adapter\Module\Repository\ModuleRepository;
use PrestaShop\PrestaShop\Adapter\SymfonyContainer;
use PrestaShop\PrestaShop\Core\Context\LegacyControllerContext;
use PrestaShop\PrestaShop\Core\Exception\ContainerNotFoundException;
use PrestaShop\PrestaShop\Core\Localization\CLDR\ComputingPrecision;
use PrestaShop\PrestaShop\Core\Localization\LocaleInterface;
use PrestaShopBundle\Install\Language as InstallLanguage;
use PrestaShopBundle\Translation\TranslatorComponent as Translator;
use PrestaShopBundle\Translation\TranslatorInterface;
use PrestaShopBundle\Translation\TranslatorLanguageLoader;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
use Symfony\Component\Filesystem\Filesystem;
use Symfony\Component\Finder\Finder;
use Symfony\Component\HttpFoundation\Session\SessionInterface;

/**
 * Class ContextCore.
 *
 * This class is responsible for holding all basic information about the environment,
 * the customer, cart, currency, language etc.
 */
class ContextCore
{
    /** @var Context|null */
    protected static $instance;

    /** @var Cart|null */
    public $cart;

    /** @var Customer|null */
    public $customer;

    /** @var Cookie|null */
    public $cookie;

    /** @var SessionInterface|null */
    public $session;

    /** @var Link|null */
    public $link;

    /** @var Country|null */
    public $country;

    /** @var Employee|null */
    public $employee;

    /** @var AdminController|FrontController|LegacyControllerContext|null */
    public $controller;

    /** @var string */
    public $override_controller_name_for_translations;

    /** @var Language|InstallLanguage|null */
    public $language;

    /** @var Currency|null */
    public $currency;

    /**
     * Current locale instance.
     *
     * @var LocaleInterface|null
     */
    public $currentLocale;

    /** @var Tab */
    public $tab;

    /** @var Shop|null */
    public $shop;

    /** @var Shop */
    public $tmpOldShop;

    /** @var Smarty|null */
    public $smarty;

    public ?MobileDetect $mobile_detect = null;

    /** @var int */
    public $mode;

    /** @var ContainerBuilder|ContainerInterface|null */
    public $container;

    /** @var float */
    public $virtualTotalTaxExcluded = 0;

    /** @var float */
    public $virtualTotalTaxIncluded = 0;

    /** @var Translator */
    protected $translator = null;

    /** @var int */
    protected $priceComputingPrecision = null;

    /** Mobile device of the customer. */
    protected ?bool $mobile_device = null;

    protected ?bool $is_mobile = null;

    protected ?bool $is_tablet = null;

    /** @var int */
    public const DEVICE_COMPUTER = 1;

    /** @var int */
    public const DEVICE_TABLET = 2;

    /** @var int */
    public const DEVICE_MOBILE = 4;

    /** @var int */
    public const MODE_STD = 1;

    /** @var int */
    public const MODE_STD_CONTRIB = 2;

    /** @var int */
    public const MODE_HOST_CONTRIB = 4;

    /** @var int */
    public const MODE_HOST = 8;

    /** Sets MobileDetect tool object. */
    public function getMobileDetect(): MobileDetect
    {
        if ($this->mobile_detect === null) {
            $this->mobile_detect = new MobileDetect();
        }

        return $this->mobile_detect;
    }

    /** Checks if visitor's device is a mobile device. */
    public function isMobile(): bool
    {
        if ($this->is_mobile === null) {
            $mobileDetect = $this->getMobileDetect();
            $this->is_mobile = $mobileDetect->isMobile();
        }

        return $this->is_mobile;
    }

    /** Checks if visitor's device is a tablet device. */
    public function isTablet(): bool
    {
        if ($this->is_tablet === null) {
            $mobileDetect = $this->getMobileDetect();
            $this->is_tablet = $mobileDetect->isTablet();
        }

        return $this->is_tablet;
    }

    /**
     * @deprecated since 9.0.0 - This functionality was disabled. Function will be completely removed
     * in the next major. There is no replacement, all clients should have the same experience.
     *
     * Sets mobile_device context variable.
     */
    public function getMobileDevice(): bool
    {
        @trigger_error(
            sprintf(
                '%s is deprecated since version 9.0.0. There is no replacement.',
                __METHOD__
            ),
            E_USER_DEPRECATED
        );

        return false;
    }

    /** Returns mobile device type. */
    public function getDevice(): int
    {
        static $device = null;

        if ($device === null) {
            if ($this->isTablet()) {
                $device = Context::DEVICE_TABLET;
            } elseif ($this->isMobile()) {
                $device = Context::DEVICE_MOBILE;
            } else {
                $device = Context::DEVICE_COMPUTER;
            }
        }

        return $device;
    }

    /**
     * @return LocaleInterface|null
     */
    public function getCurrentLocale()
    {
        return $this->currentLocale;
    }

    /**
     * @deprecated since 9.0.0 - This functionality was disabled. Function will be completely removed
     * in the next major. There is no replacement, all clients should have the same experience.
     *
     * Checks if mobile context is possible.
     *
     * @return bool
     */
    protected function checkMobileContext()
    {
        @trigger_error(
            sprintf(
                '%s is deprecated since version 9.0.0. There is no replacement.',
                __METHOD__
            ),
            E_USER_DEPRECATED
        );

        return false;
    }

    /**
     * Get a singleton instance of Context object.
     *
     * @return Context|null
     */
    public static function getContext()
    {
        if (!isset(self::$instance)) {
            self::$instance = new Context();
        }

        return self::$instance;
    }

    /**
     * @param Context $testInstance Unit testing purpose only
     */
    public static function setInstanceForTesting($testInstance)
    {
        self::$instance = $testInstance;
    }

    /**
     * Unit testing purpose only.
     */
    public static function deleteTestingInstance()
    {
        self::$instance = null;
    }

    /**
     * Clone current context object.
     *
     * @return static
     */
    public function cloneContext()
    {
        return clone $this;
    }

    /**
     * Updates customer in the context, updates the cookie and writes the updated cookie.
     *
     * @param Customer $customer Created customer
     */
    public function updateCustomer(Customer $customer)
    {
        // Update the customer in context object
        $this->customer = $customer;

        // Update basic information in the cookie
        $this->cookie->id_customer = (int) $customer->id;
        $this->cookie->customer_lastname = $customer->lastname;
        $this->cookie->customer_firstname = $customer->firstname;
        $this->cookie->passwd = $customer->passwd;
        $this->cookie->logged = true;
        $customer->logged = true;
        $this->cookie->email = $customer->email;

        // Don't confuse this with "id_guest" and Guest object, that's something completely different
        $this->cookie->is_guest = $customer->isGuest();

        /*
         * If "re-display cart at login" option is enabled in Prestashop configuration,
         * there is no cart in previous cookie or there is, but empty,
         * and we managed to get that cart ID, we will re-use it.
         *
         * We don't want to flush his cart, if he made it when logged out.
         */
        if (Configuration::get('PS_CART_FOLLOWING')
            && (empty($this->cookie->id_cart) || Cart::getNbProducts((int) $this->cookie->id_cart) == 0)
            && $idCart = (int) Cart::lastNoneOrderedCart($this->customer->id)
        ) {
            $this->cart = new Cart($idCart);
            $this->cart->secure_key = $customer->secure_key;
            $this->cookie->id_guest = (int) $this->cart->id_guest;

        /*
        * Otherwise, normal cart recovery and update scenario.
        */
        } else {
            // Initialize new visit only if there is no visit identifier yet
            if (!$this->cookie->id_guest) {
                Guest::setNewGuest($this->cookie);
            }

            // If there is some cart created in the context before logging in
            if (Validate::isLoadedObject($this->cart)) {
                // We need to update the cart so it matches the customer
                $this->cart->secure_key = $customer->secure_key;
                $this->cart->id_guest = (int) $this->cookie->id_guest;

                // Update and revalidate the selected delivery option
                $idCarrier = (int) $this->cart->id_carrier;
                $this->cart->id_carrier = 0;
                if (!empty($idCarrier)) {
                    $deliveryOption = [$this->cart->id_address_delivery => $idCarrier . ','];
                    $this->cart->setDeliveryOption($deliveryOption);
                } else {
                    $this->cart->setDeliveryOption(null);
                }

                // Set proper customer ID and assign addresses to the cart
                $this->cart->id_customer = (int) $customer->id;
                $this->cart->updateAddressId($this->cart->id_address_delivery, (int) Address::getFirstCustomerAddressId((int) $customer->id));
                $this->cart->id_address_delivery = (int) Address::getFirstCustomerAddressId((int) $customer->id);
                $this->cart->id_address_invoice = (int) Address::getFirstCustomerAddressId((int) $customer->id);
            }
        }

        // If previous logic resolved to some cart to be used, save it and put this information to cookie
        if (Validate::isLoadedObject($this->cart)) {
            $this->cart->save();
            $this->cookie->id_cart = (int) $this->cart->id;
        }

        // Physically save and send this cookie to the client
        $this->cookie->write();

        // Register new logged in session in customer_session table
        $this->cookie->registerSession(new CustomerSession());
    }

    /**
     * Returns a translator depending on service container availability and if the method
     * is called by the installer or not.
     *
     * @param bool $isInstaller Set to true if the method is called by the installer
     *
     * @return Translator
     */
    public function getTranslator($isInstaller = false)
    {
        if (null !== $this->translator && $this->language->locale === $this->translator->getLocale()) {
            return $this->translator;
        }

        $sfContainer = SymfonyContainer::getInstance();

        if ($isInstaller || null === $sfContainer) {
            // symfony's container isn't available in front office, so we load and configure the translator component
            $this->translator = $this->getTranslatorFromLocale($this->language->locale);
        } else {
            $this->translator = $sfContainer->get(TranslatorInterface::class);
            // We need to set the locale here because in legacy BO pages, the translator is used
            // before the TranslatorListener does its job of setting the locale according to the Request object
            $this->translator->setLocale($this->language->locale);
        }

        return $this->translator;
    }

    /**
     * Returns a new instance of Translator for the provided locale code.
     *
     * @param string $locale IETF language tag (eg. "en-US")
     *
     * @return Translator
     */
    public function getTranslatorFromLocale($locale)
    {
        $cacheDir = _PS_CACHE_DIR_ . 'translations';
        $translator = new Translator($locale, null, $cacheDir, false);

        // In case we have at least 1 translated message, we return the current translator.
        // If some translations are missing, clear cache
        if (empty($locale) || count($translator->getCatalogue($locale)->all())) {
            return $translator;
        }

        // However, in some case, even empty catalog were stored in the cache and then used as-is.
        // For this one, we drop the cache and try to regenerate it.
        if (is_dir($cacheDir)) {
            $cache_file = Finder::create()
                ->files()
                ->in($cacheDir)
                ->depth('==0')
                ->name('*.' . $locale . '.*');
            (new Filesystem())->remove($cache_file);
        }

        $translator->clearLanguage($locale);

        $adminContext = defined('_PS_ADMIN_DIR_');
        // Do not load DB translations when $this->language is InstallLanguage
        // because it means that we're looking for the installer translations, so we're not yet connected to the DB
        $withDB = !$this->language instanceof InstallLanguage;
        $theme = $this->shop !== null ? $this->shop->theme : null;

        if ($this instanceof Context) {
            try {
                $containerFinder = new ContainerFinder($this);
                $container = $containerFinder->getContainer();
                $translatorLoader = $container->get('prestashop.translation.translator_language_loader');
            } catch (ContainerNotFoundException|ServiceNotFoundException $exception) {
                $translatorLoader = null;
            }

            if (null === $translatorLoader) {
                // If a container is still not found, instantiate manually the translator loader
                // This will happen in the Front as we have legacy controllers, the Sf container won't be available.
                // As we get the translator in the controller's constructor and the container is built in the init method, we won't find it here
                $translatorLoader = (new TranslatorLanguageLoader(new ModuleRepository(_PS_ROOT_DIR_, _PS_MODULE_DIR_)));
            }

            $translatorLoader
                ->setIsAdminContext($adminContext)
                ->loadLanguage($translator, $locale, $withDB, $theme)
            ;
        }

        return $translator;
    }

    /**
     * Returns directories that contain translation resources
     *
     * @return array
     */
    protected function getTranslationResourcesDirectories()
    {
        // Default common translation folder
        $locations = [_PS_ROOT_DIR_ . '/translations'];

        // Translations for currently selected theme
        if (null !== $this->shop) {
            $activeThemeLocation = _PS_ROOT_DIR_ . '/themes/' . $this->shop->theme_name . '/translations';
            if (is_dir($activeThemeLocation)) {
                $locations[] = $activeThemeLocation;
            }
        }

        return $locations;
    }

    /**
     * Returns the computing precision according to the current currency.
     * If previously requested, it will be stored in priceComputingPrecision property.
     *
     * @return int
     */
    public function getComputingPrecision()
    {
        if ($this->priceComputingPrecision === null) {
            $computingPrecision = new ComputingPrecision();
            $this->priceComputingPrecision = $computingPrecision->getPrecision($this->currency->precision);
        }

        return $this->priceComputingPrecision;
    }
}