<?php

declare(strict_types=1);

namespace KupShop\PreordersBundle\Service;

use KupShop\CatalogBundle\ProductList\ProductCollection;
use KupShop\KupShopBundle\Context\ContextManager;
use KupShop\KupShopBundle\Context\PriceLevelContext;
use KupShop\PreordersBundle\Entity\Preorder;
use KupShop\PricelistBundle\Context\PricelistContext;

class DynamicPrices
{
    public function __construct(
        private readonly ContextManager $contextManager,
    ) {
    }

    public function inject(
        ProductCollection $into,
        \ProductList $from,
        Preorder $preorder,
        string $outKey = 'dynamic_prices',
    ): void {
        $ranges = $this->getContextRanges($preorder);

        foreach ($ranges as $contexts) {
            $dynamicProducts = $this->contextManager->activateContexts($contexts, fn () => $from->getProducts());

            foreach ($dynamicProducts as /* @var \Product $product */ $product) {
                if ($product instanceof \Variation) {
                    $current = $into[$product->id]->variations[$product->variationId][$outKey] ?? [];
                    $current[] = array_merge([], ['price' => $product->getProductPrice()]);

                    $into[$product->id]->variations[$product->variationId][$outKey] = $current;
                    continue;
                }

                $current = $into[$product->id][$outKey] ?? [];
                $current[] = array_merge([], ['price' => $product->getProductPrice()]);

                $into[$product->id][$outKey] = $current;
            }
        }
    }

    private function getContextRanges(Preorder $preorder, array $additional = []): array
    {
        $ranges = $preorder->getSettings()['dynamic_prices'] ?? [];
        array_unshift($ranges, $preorder);

        $resultingRanges = [];
        foreach ($ranges as $range) {
            $contexts = $additional;

            $priceLevel = match (true) {
                PreorderUtil::fieldIsComposedOfDigits($range, 'id_price_level') => (int) $range['id_price_level'],

                PreorderUtil::fieldIsComposedOfDigits($preorder, 'id_price_level') => (int) $preorder['id_price_level'],

                default => ContextManager::FORCE_EMPTY,
            };

            $pricelist = match (true) {
                PreorderUtil::fieldIsComposedOfDigits($range, 'id_pricelist') => (int) $range['id_pricelist'],

                PreorderUtil::fieldIsComposedOfDigits($preorder, 'id_pricelist') => (int) $preorder['id_pricelist'],

                default => ContextManager::FORCE_EMPTY,
            };

            $contexts += [
                PriceLevelContext::class => $priceLevel,
                PricelistContext::class => $pricelist,
            ];

            $resultingRanges[] = $contexts;
        }

        return $resultingRanges;
    }
}