<?php

namespace App\Service\XmlFeedGenerator;

use DOMDocument;
use DOMElement;
use App\Dto\SpecialistFilterDto;
use App\Entity\Filial;
use App\Entity\Specialist;
use App\Service\PriceList\PriceListService;
use App\Service\Specialist\SpecialistService;
use App\Service\Helper\HelperService;
use Doctrine\DBAL\Connection;
use Psr\Log\LoggerInterface;

class XmlFeedGeneratorV1Service
{
    private DOMDocument $dom;
    private Filial $filial;

    /** @var array<int, Filial> */
    private array $filialsByFid = [];

    public function __construct(
        private PriceListService $priceListService,
        private SpecialistService $specialistService,
        private HelperService $helperService,
        private Connection $connection,
        private ?LoggerInterface $logger = null,
    ) {
        $this->dom = new DOMDocument('1.0', 'UTF-8');
        $this->dom->formatOutput = true;
    }

    /**
     * @param Filial|Filial[] $filials один филиал или массив филиалов (например, по региону)
     */
    public function generateFeed(Filial|array $filials): string
    {
        $filialList = is_array($filials) ? $filials : [$filials];
        if ($filialList === []) {
            $this->dom = new DOMDocument('1.0', 'UTF-8');
            $this->dom->formatOutput = true;
            return $this->dom->saveXML();
        }

        $this->dom = new DOMDocument('1.0', 'UTF-8');
        $this->dom->formatOutput = true;

        $this->filial = $filialList[0];
        $this->filialsByFid = [];
        foreach ($filialList as $f) {
            $this->filialsByFid[$f->getFid()] = $f;
        }

        $ymlCatalog = $this->dom->createElement('yml_catalog');
        $ymlCatalog->setAttribute('date', date('Y-m-d H:i'));
        $this->dom->appendChild($ymlCatalog);
        
        $shop = $this->dom->createElement('shop');
        $ymlCatalog->appendChild($shop);
        
        $this->addShopInfo($shop);
        $this->addCurrencies($shop);
        $this->addCategories($shop);
        $this->addSets($shop);
        $this->addOffers($shop);
        
        return $this->dom->saveXML();
    }
    
    private function addShopInfo(DOMElement $shop): void
    {
        $this->addTextElement($shop, 'name', $this->getShopName());
        $this->addTextElement($shop, 'company', $this->filial->getCompany());
        $this->addTextElement($shop, 'url', $this->filial->getOrigin());
        $this->addTextElement($shop, 'email', $this->filial->getEmail());
    }

    private function addCurrencies(DOMElement $shop): void
    {
        $currencies = $this->dom->createElement('currencies');
        $currency = $this->dom->createElement('currency');
        $currency->setAttribute('id', 'RUR');
        $currency->setAttribute('rate', '1');
        $currencies->appendChild($currency);
        $shop->appendChild($currencies);
    }

    private function addCategories(DOMElement $shop): void
    {
        $categories = $this->dom->createElement('categories');
        $category = $this->dom->createElement('category', 'Врач');
        $category->setAttribute('id', '1');
        $categories->appendChild($category);
        $shop->appendChild($categories);
    }

    private function addSets(DOMElement $shop): void
    {
        $sets = $this->dom->createElement('sets');
        $departments = $this->connection->fetchAllAssociative(
            'SELECT did, name FROM departments WHERE active = :active ORDER BY id ASC',
            ['active' => true]
        );

        foreach ($departments as $department) {
            $set = $this->dom->createElement('set');
            $set->setAttribute('id', (string) $department['did']);

            $name = $this->dom->createElement('name', (string) $department['name']);
            $set->appendChild($name);
            
            $sets->appendChild($set);
        }
        
        $shop->appendChild($sets);
    }

    private function getShopName(): string
    {
        return match ($this->filial->getRegionId()) {
            94 => 'Клиника ВМТ Сова',
            default => match ($this->filial->getFid()) {
                9 => 'Совёнок',
                default => 'Сова',
            }
        };
    }

    private function getShopPicture(): string
    {
        $picture = match ($this->filial->getRegionId()) {
            94 => 'wmtmed.png',
            default => match ($this->filial->getFid()) {
                9 => 'sovenok.png',
                10 => 'comfort.jpg',
                default => 'sovamed.png',
            }
        };

        return "https://api.sovamed.ru/images/logo/{$picture}";
    }

    private function getSpecialistLink(Specialist $specialist): string
    {
        $url = $this->filial->getOrigin();
        $url .= match ($this->filial->getId()) {
            9 => '/doctors/',
            14 => '/doctors/',
            10 => '/doctors/',
            8 => '/specialisty',
            default => '/vrachi'
        };

        if (!in_array($this->filial->getId(), [9, 14, 10])) {
            $sType = $specialist->getSType();
            if ($sType !== null) {
                $url .= match ($sType) {
                    0 => '/vzroslyj-vrach/',
                    1 => '/detskij-vrach/',
                    2 => '/administraciya/',
                    default => '/vzroslyj-vrach/',
                };
            } else {
                $this->logger?->info('Specialist type is not set', ['specialist' => $specialist->getId()]);
            }
        }
        $url .= $specialist->getAlias();
        $url .= '/';

        return $url;
    }

    private function getCity(): string
    {
        return match ((int) $this->filial->getRegionId()) {
            91 => 'Саратов',
            92 => 'Волгоград',
            93 => 'Воронеж',
            94 => 'Краснодар',
            default => ''
        };
    }

    private function addOffers(DOMElement $shop): void
    {
        $offersElement = $this->dom->createElement('offers');

        $fids = array_keys($this->filialsByFid);
        if ($fids === []) {
            $shop->appendChild($offersElement);
            return;
        }

        $filter = new SpecialistFilterDto();
        $filter->kiosk = true;
        $filter->sFilial = array_map('strval', $fids);
        $specialistList = $this->specialistService->getList($filter);    
        
        foreach ($specialistList as $specialist) {
            $specialistDescription = $specialist->getPost();

            $offerElement = $this->dom->createElement('offer');
            $offerElement->setAttribute('id', (string) $specialist->getId());
            $url = $this->getSpecialistLink($specialist);
            $experience = $specialist->getExperience();
            $experienceYears = $experience && is_numeric($experience) && $experience > 1900 && $experience <= date('Y')
                ? date('Y') - (int) $experience
                : null;

            if ($experienceYears !== null) {
                $specialistDescription .= ' с опытом работы ' . $this->helperService->textYear($experienceYears, true);
            }
            $specialistDescription .= '. Запись к специалисту на сайте';
            
            $this->addTextElement($offerElement, 'name', $specialist->getName() ?? '');
            $this->addTextElement($offerElement, 'description', $specialistDescription ?? '');
            $this->addTextElement($offerElement, 'url', $url);
            $this->addTextElement($offerElement, 'set-ids', $specialist->getDcodes());
            
            $picture = "https://api.sovamed.ru/specialist/picture/{$specialist->getId()}";
            $this->addTextElement($offerElement, 'picture', $picture);
            $this->addTextElement($offerElement, 'categoryId', '1');
            $this->addTextElement($offerElement, 'currencyId', 'RUR');
            $offersElement->appendChild($offerElement);
        }

        $shop->appendChild($offersElement);
    }

    private function addTextElement(DOMElement $parent, string $name, $value): void
    {
        if ($value !== null && $value !== '') {
            $parent->appendChild($this->dom->createElement($name, $this->prepareXmlContent((string)$value)));
        }
    }

    private function addParamElement(DOMElement $parent, string $name, $value): void
    {
        if ($value !== null && $value !== '') {
            $param = $this->dom->createElement('param', $this->prepareXmlContent((string)$value));
            $param->setAttribute('name', $name);
            $parent->appendChild($param);
        }
    }

    private function prepareXmlContent($content): string 
    {
        $content = str_replace('&', '&amp;', $content);
        $validEntities = [
            '&amp;nbsp;' => '&#160;',
            '&amp;amp;' => '&amp;',
            '&amp;lt;' => '&lt;',
            '&amp;gt;' => '&gt;',
            '&amp;quot;' => '&quot;',
            '&amp;apos;' => '&apos;'
        ];
        $content = str_replace(array_keys($validEntities), array_values($validEntities), $content);

        return htmlspecialchars($content, ENT_XML1 | ENT_QUOTES, 'UTF-8');
    }
}