<?php

namespace DHL;

use DHL\Model\Config\DHLConfigValue;
use DHL\Model\DHLDeliveryPrice;
use Propel\Runtime\Connection\ConnectionInterface;
use Thelia\Core\Translation\Translator;
use Thelia\Exception\TheliaProcessException;
use Thelia\Install\Database;
use Thelia\Model\Area;
use Thelia\Model\AreaDeliveryModule;
use Thelia\Model\AreaQuery;
use Thelia\Model\Country;
use Thelia\Model\CountryArea;
use Thelia\Model\CountryQuery;
use Thelia\Model\Currency;
use Thelia\Module\AbstractDeliveryModule;
use Thelia\Module\Exception\DeliveryException;

class DHL extends AbstractDeliveryModule
{
    protected $request;
    protected $dispatcher;

    private static $prices = null;

    const DOMAIN_NAME = 'dhl';
    const JSON_PRICE_RESOURCE = "/Config/prices.json";
    const WEBSERVICE_URL = 'tracking_url';

    public static function getPrices()
    {
        if (null === self::$prices) {
            self::$prices = json_decode(DHL::getConfigValue(DHLConfigValue::PRICES, null), true);
        }

        return self::$prices;
    }

    public function postActivation(ConnectionInterface $con = null)
    {
        self::setConfigValue(DHLConfigValue::ENABLED, 1);

        $database = new Database($con);
        $database->insertSql(null, array(__DIR__ . '/Config/thelia.sql'));

        // Create DHL shipping zones for relay and home delivery
        $moduleId = self::getModuleId();
        $rateFromEuro = Currency::getDefaultCurrency()->getRate();
        $moduleConfiguration = json_decode(file_get_contents(__DIR__. '/Config/prices.json'));
        if (false === $moduleConfiguration) {
            throw new TheliaProcessException("Invalid JSON configuration for DHL module");
        }

        // Create all shipping zones, and associate DHL module with them.
        foreach ($moduleConfiguration->shippingZones as $shippingZone) {
            AreaQuery::create()->filterByName($shippingZone->name)->delete();

            $area = new Area();
            $area
                ->setName($shippingZone->name)
                ->save();

            foreach ($shippingZone->countries as $countryIsoCode) {
                if (null !== $country = CountryQuery::create()->findOneByIsoalpha3($countryIsoCode)) {
                    (new CountryArea())
                        ->setAreaId($area->getId())
                        ->setCountryId($country->getId())
                        ->save();
                }
            }

            // Attach this zone to our module
            (new AreaDeliveryModule())
                ->setArea($area)
                ->setDeliveryModuleId($moduleId)
                ->save();

            // Create base prices
            foreach ($shippingZone->prices as $price) {
                (new DHLDeliveryPrice())
                    ->setAreaId($area->getId())
                    ->setMaxWeight($price->up_to)
                    ->setPriceWithTax($price->price_euro * $rateFromEuro)
                    ->save();
            }
        }


    }

    public function isValidDelivery(Country $country)
    {
        if (0 == self::getConfigValue(DHLConfigValue::ENABLED, 1)) {
            return false;
        }

        if (null !== $area = $this->getAreaForCountry($country)) {
            $areaId = $area->getId();

            $prices = self::getPrices();

            /* Check if DHL delivers the area */
            if (isset($prices[$areaId]) && isset($prices[$areaId]["slices"])) {
                // Yes ! Check if the cart weight is below slice limit
                $areaPrices = $prices[$areaId]["slices"];
                ksort($areaPrices);

                /* Check cart weight is below the maximum weight */
                end($areaPrices);
                $maxWeight = key($areaPrices);

                $cartWeight = $this->getRequest()->getSession()->getSessionCart($this->getDispatcher())->getWeight();

                if ($cartWeight <= $maxWeight) {
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * @param $areaId
     * @param $weight
     *
     * @return mixed
     * @throws \Thelia\Exception\OrderException
     */
    public static function getPostageAmount($areaId, $weight)
    {
        $postage = 0;
        $prices = self::getPrices();

        /* check if DHL delivers the asked area */
        if (!isset($prices[$areaId]) || !isset($prices[$areaId]["slices"])) {
            throw new DeliveryException(
                Translator::getInstance()->trans(
                    "DHL delivery unavailable for the delivery country",
                    [],
                    self::DOMAIN_NAME
                )
            );
        }

        $areaPrices = $prices[$areaId]["slices"];
        ksort($areaPrices);

        /* Check cart weight is below the maximum weight */
        end($areaPrices);
        $maxWeight = key($areaPrices);
        if ($weight > $maxWeight) {
            throw new DeliveryException(
                Translator::getInstance()->trans(
                    "DHL delivery unavailable for this cart weight (%weight kg)",
                    array("%weight" => $weight),
                    self::DOMAIN_NAME
                )
            );
        }

        $postage = current($areaPrices);

        while (prev($areaPrices)) {
            if ($weight > key($areaPrices)) {
                break;
            }

            $postage = current($areaPrices);
        }
        return $postage;

    }

    /**
     *
     * calculate and return delivery price
     *
     * @param Country $country
     * @return mixed
     * @throws \Thelia\Exception\OrderException
     */
    public function getPostage(Country $country)
    {
        $cartWeight = $this->getRequest()->getSession()->getSessionCart($this->getDispatcher())->getWeight();

        $postage = self::getPostageAmount(
            $this->getAreaForCountry($country)->getId(),
            $cartWeight
        );

        return $postage;
    }

    public function update($currentVersion, $newVersion, ConnectionInterface $con = null)
    {
        $uploadDir = __DIR__ . '/Config/prices.json';
        if (is_readable($uploadDir) && DHL::getConfigValue(DHLConfigValue::PRICES, null) == null) {
            DHL::setConfigValue(DHLConfigValue::PRICES, file_get_contents($uploadDir));
        }
    }
}