<?php
declare(strict_types=1);

namespace Esun\Homepage\Block;

use Esun\Catalog\Model\Product\CardPriceResolver;
use Esun\Video\Model\ResourceModel\Video\CollectionFactory as VideoCollectionFactory;
use Magento\Catalog\Block\Product\AbstractProduct;
use Magento\Catalog\Block\Product\Context;
use Magento\Catalog\Model\Product;
use Magento\Catalog\Model\Product\Visibility;
use Magento\Catalog\Model\ResourceModel\Product\CollectionFactory as ProductCollectionFactory;
use Magento\Customer\Model\Context as CustomerContext;
use Magento\Framework\App\Http\Context as HttpContext;
use Magento\Framework\DataObject\IdentityInterface;
use Magento\Framework\Pricing\PriceCurrencyInterface;
use Magento\Framework\Serialize\SerializerInterface;
use Magento\Framework\UrlInterface;
use Magento\Store\Model\ScopeInterface;

class CreateAnything extends AbstractProduct implements IdentityInterface
{
    private const XML_PATH_ITEMS = 'esun_homepage/create_anything/items';

    /**
     * @var array<int, array<string, mixed>>|null
     */
    private ?array $items = null;

    public function __construct(
        Context $context,
        private readonly ProductCollectionFactory $productCollectionFactory,
        private readonly VideoCollectionFactory $videoCollectionFactory,
        private readonly Visibility $productVisibility,
        private readonly PriceCurrencyInterface $priceCurrency,
        private readonly SerializerInterface $serializer,
        private readonly HttpContext $httpContext,
        private readonly CardPriceResolver $cardPriceResolver,
        array $data = []
    ) {
        parent::__construct($context, $data);
    }

    /**
     * @return array<int, array<string, mixed>>
     */
    public function getItems(): array
    {
        if ($this->items !== null) {
            return $this->items;
        }

        $configuredItems = $this->getConfiguredItems();
        if (!$configuredItems) {
            return $this->items = [];
        }

        $videoIds = [];
        $skus = [];
        foreach ($configuredItems as $item) {
            $videoId = (int) ($item['video_id'] ?? 0);
            $sku = trim((string) ($item['product_sku'] ?? ''));
            if ($videoId > 0) {
                $videoIds[$videoId] = $videoId;
            }
            if ($sku !== '') {
                $skus[strtolower($sku)] = $sku;
            }
        }

        $videosById = [];
        if ($videoIds) {
            $videoCollection = $this->videoCollectionFactory->create();
            $videoCollection->addFieldToFilter('video_id', ['in' => array_values($videoIds)]);
            $videoCollection->addFieldToFilter('status', 1);
            foreach ($videoCollection as $video) {
                $videosById[(int) $video->getId()] = $video;
            }
        }

        $productsBySku = [];
        if ($skus) {
            $productCollection = $this->productCollectionFactory->create();
            $productCollection->setStoreId((int) $this->_storeManager->getStore()->getId());
            $this->_addProductAttributesAndPrices($productCollection);
            $productCollection->addStoreFilter();
            $productCollection->addAttributeToFilter('sku', ['in' => array_values($skus)]);
            $productCollection->addAttributeToFilter(
                'visibility',
                ['in' => $this->productVisibility->getVisibleInSiteIds()]
            );
            $productCollection->addAttributeToFilter(
                'status',
                Product\Attribute\Source\Status::STATUS_ENABLED
            );
            foreach ($productCollection as $product) {
                $productsBySku[strtolower((string) $product->getSku())] = $product;
            }
        }

        $mediaBaseUrl = $this->_storeManager->getStore()->getBaseUrl(UrlInterface::URL_TYPE_MEDIA);
        $this->items = [];
        foreach ($configuredItems as $item) {
            $videoId = (int) ($item['video_id'] ?? 0);
            $skuKey = strtolower(trim((string) ($item['product_sku'] ?? '')));
            $video = $videosById[$videoId] ?? null;
            $product = $productsBySku[$skuKey] ?? null;
            if (!$video || !$product) {
                continue;
            }

            $this->items[] = [
                'title' => trim((string) ($item['title'] ?? '')),
                'subtitle' => trim((string) ($item['subtitle'] ?? '')),
                'sort_number' => (int) ($item['sort_number'] ?? 0),
                'video_url' => $mediaBaseUrl . ltrim((string) $video->getData('video_path'), '/'),
                'cover_url' => $mediaBaseUrl . ltrim((string) $video->getData('cover_path'), '/'),
                'product' => $product,
            ];
        }

        return $this->items;
    }

    public function getFormattedFinalPrice(Product $product): string
    {
        return $this->formatPrice($this->getFinalPriceValue($product));
    }

    public function getFormattedRegularPrice(Product $product): string
    {
        return $this->formatPrice($this->getRegularPriceValue($product));
    }

    public function hasRegularPrice(Product $product): bool
    {
        return $this->getRegularPriceValue($product) > $this->getFinalPriceValue($product);
    }

    public function getCacheKeyInfo(): array
    {
        return [
            'ESUN_HOMEPAGE_CREATE_ANYTHING',
            (int) $this->_storeManager->getStore()->getId(),
            (int) $this->httpContext->getValue(CustomerContext::CONTEXT_GROUP),
            sha1((string) $this->_scopeConfig->getValue(
                self::XML_PATH_ITEMS,
                ScopeInterface::SCOPE_STORE
            )),
        ];
    }

    public function getIdentities(): array
    {
        $identities = [];
        foreach ($this->getItems() as $item) {
            $product = $item['product'] ?? null;
            if ($product instanceof Product) {
                $identities = array_merge($identities, $product->getIdentities());
            }
        }

        return array_values(array_unique($identities));
    }

    /**
     * @return array<int, array<string, mixed>>
     */
    private function getConfiguredItems(): array
    {
        $value = $this->_scopeConfig->getValue(
            self::XML_PATH_ITEMS,
            ScopeInterface::SCOPE_STORE
        );
        if (is_array($value)) {
            return array_values($value);
        }
        if (!is_string($value) || trim($value) === '') {
            return [];
        }

        try {
            $items = $this->serializer->unserialize($value);
        } catch (\InvalidArgumentException) {
            return [];
        }

        return is_array($items) ? array_values($items) : [];
    }

    private function getFinalPriceValue(Product $product): float
    {
        return $this->cardPriceResolver->getFinalPrice($product);
    }

    private function getRegularPriceValue(Product $product): float
    {
        return $this->cardPriceResolver->getRegularPrice($product);
    }

    private function formatPrice(float $price): string
    {
        return $this->priceCurrency->format(
            $price,
            false,
            PriceCurrencyInterface::DEFAULT_PRECISION,
            $this->_storeManager->getStore()
        );
    }
}