<?php
declare(strict_types=1);

namespace Esun\LingxingErp\Model\Order;

use Esun\LingxingErp\Model\Config;
use Magento\Sales\Api\Data\OrderInterface;
use Magento\Store\Model\StoreManagerInterface;

class OrderPayloadBuilder
{
    /**
     * Lingxing API documentation:
     * https://apidoc.lingxing.com/#/docs/hide/CreateOrdersV2.md
     */
    public function __construct(
        private readonly Config $config,
        private readonly StoreManagerInterface $storeManager
    ) {
    }

    public function build(OrderInterface $order): array
    {
        $websiteId = (int)$this->storeManager->getStore((int)$order->getStoreId())->getWebsiteId();
        $this->config->assertOrderMappingReady($websiteId);
        $address = $order->getShippingAddress() ?: $order->getBillingAddress();
        if ($address === null) {
            throw new \RuntimeException('Magento order has no shipping or billing address.');
        }

        $items = [];
        foreach ($order->getAllVisibleItems() as $item) {
            if ($item->getIsVirtual()) {
                continue;
            }
            $sku = trim((string)$item->getSku());
            if ($sku === '') {
                throw new \RuntimeException('Magento order item has an empty SKU.');
            }
            $items[] = [
                'msku' => $sku,
                'quantity' => (int)$item->getQtyOrdered(),
                'unit_price' => (float)$item->getPrice(),
                'stock_deduction_type' => $this->config->getStockDeductionType(),
            ];
        }
        if ($items === []) {
            throw new \RuntimeException('Magento order has no physical SKU to export.');
        }

        $street = $address->getStreet();
        $streetLines = array_values(array_filter(array_map(
            static fn ($line): string => trim((string)$line),
            is_array($street) ? $street : [(string)$street]
        ), static fn (string $line): bool => $line !== ''));
        $receiverName = trim((string)$address->getFirstname() . ' ' . (string)$address->getLastname());
        $buyerName = trim(implode(' ', array_filter([
            trim((string)$order->getCustomerFirstname()),
            trim((string)$order->getCustomerMiddlename()),
            trim((string)$order->getCustomerLastname()),
        ], static fn (string $part): bool => $part !== '')));
        $buyerEmail = trim((string)$order->getCustomerEmail());
        if ($buyerEmail === '') {
            $buyerEmail = trim((string)$address->getEmail());
        }
        $orderData = [
            'platform_order_no' => (string)$order->getIncrementId(),
            'receiver_country_code' => (string)$address->getCountryId(),
            'customer_shipping_amount' => (float)$order->getShippingAmount(),
            'customer_tax_amount' => (float)$order->getTaxAmount(),
            'order_total_amount' => (float)$order->getGrandTotal(),
            'global_purchase_time' => (new \DateTimeImmutable((string)$order->getCreatedAt(), new \DateTimeZone('UTC')))->getTimestamp(),
            'receiver_name' => $receiverName,
            'receiver_company_name' => (string)$address->getCompany(),
            'city' => (string)$address->getCity(),
            'address_line1' => $streetLines[0] ?? '',
            'amount_currency' => (string)$order->getOrderCurrencyCode(),
            'items' => $items,
        ];
        $optionalAddressData = [
            'state_or_region' => trim((string)$address->getRegion()),
            'postal_code' => trim((string)$address->getPostcode()),
            'address_line2' => $streetLines[1] ?? '',
            'address_line3' => count($streetLines) > 2 ? implode(' ', array_slice($streetLines, 2)) : '',
            'receiver_mobile' => trim((string)$address->getTelephone()),
            'buyer_email' => $buyerEmail,
            'buyer_name' => $buyerName !== '' ? $buyerName : $receiverName,
        ];
        foreach ($optionalAddressData as $field => $value) {
            if ($value !== '') {
                $orderData[$field] = $value;
            }
        }
        if ((string)$order->getCustomerNote() !== '') {
            $orderData['buyer_note'] = (string)$order->getCustomerNote();
        }
        if ($this->config->getWarehouseId($websiteId) !== '') {
            $orderData['wid'] = $this->config->getWarehouseId($websiteId);
            $orderData['logistics_type_id'] = $this->config->getLogisticsTypeId($websiteId);
        }

        return [
            'platform_code' => $this->config->getPlatformCode($websiteId),
            'store_id' => $this->config->getLingxingStoreId($websiteId),
            'orders' => [$orderData],
        ];
    }
}