<?php

namespace Neom\CategoryLanding\Block\Widget\Bestsellers;

use Magento\Catalog\Block\Product\AbstractProduct;
use Magento\Catalog\Block\Product\Context;
use Magento\Catalog\Block\Product\ImageBlockBuilder;
use Magento\Catalog\Model\Product;
use Magento\Catalog\Block\Widget\Link as CatalogLink;
use Neom\CategoryLanding\Provider\Widget\Bestsellers\Product\CollectionProvider;

/**
 * @author Diego Cabrejas <diego@wearejh.com>
 */
class ProductList extends AbstractProduct
{
    /**
     * @var CollectionProvider
     */
    private $collectionProvider;
    /**
     * @var ProductLink
     */
    private $productLink;

    public function __construct(
        Context $context,
        CollectionProvider $collectionProvider,
        CatalogLink $productLink,
        array $data = [],
        ImageBlockBuilder $imageBlockBuilder = null,
        string $var = ''
    ) {
        $this->collectionProvider = $collectionProvider;
        parent::__construct($context, $data, $imageBlockBuilder);
        $this->setTemplate('widget/bestsellers/product-list.phtml');
        $this->productLink = $productLink;
    }

    public function getProducts() : array
    {
        $products = $this->collectionProvider->getCollection($this->getProductIds())->getItems();
        usort($products, [$this, 'sortProducts']);

        //mark first item as Nicola's pick
        if (count($products)) {
            reset($products)->setIsNicolasPick(true);
        }

        return $products;
    }

    private function getProductIds() : array
    {
        $ids = [];

        foreach ($this->getProductIdPaths() as $idPath) {
            $ids[] = $this->getProductIdByPath($idPath);
        }

        return $ids;
    }

    private function getProductIdPaths() : array
    {
        return $this->getData('product_id_paths') ?? [];
    }

    private function getProductIdByPath(string $idPath)  : string
    {
        $parts  = explode('/', $idPath);

        if (!isset($parts[0]) || !isset($parts[1])) {
            throw new \RuntimeException('Wrong id_path structure.');
        }

        return $parts[1];
    }

    private function getProductPathByProductId(int $id) : string
    {
        foreach ($this->getProductIdPaths() as $idPath) {
            $productId = $this->getProductIdByPath($idPath);
            if ($productId === $id) {
                return $idPath;
            }
        }

        return '';
    }

    private function sortProducts(Product $productA, Product $productB)
    {
        $productIds = $this->getProductIds();
        return array_search($productA->getId(), $productIds) <=> array_search($productB->getId(), $productIds);
    }

    public function getProductLink(Product $product) : string
    {
        $idPath = $this->getProductPathByProductId($product->getId());
        $this->productLink->setData('id_path', $idPath);
        return $this->productLink->getHref();
    }
}