<?php
/**
 * Copyright since 2024 Webshop System
 *
 * Zentrale Registry für den aktuellen Webshop-Kontext (User, Shop, Sprache, etc.)
 *
 * @author    Webshop System
 * @license   GPL v3
 */

class Context
{
    /** @var Context|null */
    protected static $instance;

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

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

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

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

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

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

    /** @var Controller|null */
    public $controller;

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

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

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

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

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

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

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

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

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

    /** @var bool|null */
    protected $mobile_device = null;

    /** @var bool|null */
    protected $is_mobile = null;

    /** @var bool|null */
    protected $is_tablet = null;

    /** @var MobileDetect|null */
    public $mobile_detect = null;

    // Device constants
    public const DEVICE_COMPUTER = 1;
    public const DEVICE_TABLET = 2;
    public const DEVICE_MOBILE = 4;

    // Mode constants
    public const MODE_STD = 1;
    public const MODE_STD_CONTRIB = 2;
    public const MODE_HOST_CONTRIB = 4;
    public const MODE_HOST = 8;

    private function __construct()
    {
        // Initialisierung erfolgt später
    }

    /**
     * Singleton-Instanz holen
     * @return Context|null
     */
    public static function getContext()
    {
        if (!isset(self::$instance)) {
            self::$instance = new Context();
        }
        return self::$instance;
    }

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

    /**
     * Delete testing instance
     */
    public static function deleteTestingInstance()
    {
        self::$instance = null;
    }

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

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

        return $this->mobile_detect;
    }

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

        return $this->is_mobile;
    }

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

        return $this->is_tablet;
    }

    /**
     * Get mobile device
     *
     * @return bool
     */
    public function getMobileDevice(): bool
    {
        if ($this->mobile_device === null) {
            $this->mobile_device = $this->isMobile() || $this->isTablet();
        }

        return $this->mobile_device;
    }

    /**
     * Get device type
     *
     * @return int
     */
    public function getDevice(): int
    {
        if ($this->isMobile()) {
            return self::DEVICE_MOBILE;
        }

        if ($this->isTablet()) {
            return self::DEVICE_TABLET;
        }

        return self::DEVICE_COMPUTER;
    }

    /**
     * Get current locale
     *
     * @return string
     */
    public function getCurrentLocale()
    {
        if ($this->language) {
            return $this->language->locale;
        }

        return 'en-US';
    }

    /**
     * Update customer in context
     *
     * @param Customer $customer
     */
    public function updateCustomer(Customer $customer)
    {
        // Update the customer in context object
        $this->customer = $customer;

        // Update basic information in the cookie
        if ($this->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;
            $this->cookie->is_guest = $customer->isGuest();

            // Handle cart following
            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) $this->cart->id_guest;
            } else {
                // Initialize new visit
                if (!$this->cookie->id_guest) {
                    Guest::setNewGuest($this->cookie);
                }

                // Update cart if exists
                if (Validate::isLoadedObject($this->cart)) {
                    $this->cart->secure_key = $customer->secure_key;
                    $this->cart->id_guest = (int) $this->cookie->id_guest;
                    $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);
                }
            }

            // Save cart and update cookie
            if (Validate::isLoadedObject($this->cart)) {
                $this->cart->save();
                $this->cookie->id_cart = (int) $this->cart->id;
            }

            // Save cookie
            $this->cookie->write();
        }
    }

    /**
     * Get translator
     *
     * @param bool $isInstaller
     * @return Translator
     */
    public function getTranslator($isInstaller = false)
    {
        if (null !== $this->translator && $this->language && $this->language->locale === $this->translator->getLocale()) {
            return $this->translator;
        }

        if ($isInstaller || !$this->language) {
            $this->translator = $this->getTranslatorFromLocale('en-US');
        } else {
            $this->translator = $this->getTranslatorFromLocale($this->language->locale);
        }

        return $this->translator;
    }

    /**
     * Get translator from locale
     *
     * @param string $locale
     * @return Translator
     */
    public function getTranslatorFromLocale($locale)
    {
        $cacheDir = _PS_CACHE_DIR_ . 'translations';
        $translator = new Translator($locale, null, $cacheDir, false);

        return $translator;
    }

    /**
     * Get computing precision
     *
     * @return int
     */
    public function getComputingPrecision()
    {
        if ($this->priceComputingPrecision === null) {
            $this->priceComputingPrecision = (int) Configuration::get('PS_PRICE_COMPUTE_PRECISION');
        }

        return $this->priceComputingPrecision;
    }

    /**
     * Check mobile context
     */
    protected function checkMobileContext()
    {
        if ($this->getMobileDevice()) {
            $this->mode = self::MODE_STD;
        }
    }
}