<?php

namespace App\Services\Pos;

use App\Models\PosLocation;
use App\Models\PosProduct;
use App\Services\Crm\CrmClient;

class PosBarcodeLookupService
{
    /**
     * Resolve a scanned barcode/SKU to a register line item.
     *
     * @return array{id: int|string|null, name: string, price_minor: int, sku: string|null}|null
     */
    public function lookup(string $ownerRef, PosLocation $location, string $code): ?array
    {
        $code = trim($code);
        if ($code === '') {
            return null;
        }

        if ($location->isRestaurant()) {
            return $this->lookupLocal($ownerRef, $code);
        }

        return $this->lookupRetail($ownerRef, $code) ?? $this->lookupLocal($ownerRef, $code);
    }

  /** @return array{id: int|string|null, name: string, price_minor: int, sku: string|null}|null */
    private function lookupLocal(string $ownerRef, string $code): ?array
    {
        $product = PosProduct::owned($ownerRef)
            ->active()
            ->where('sku', $code)
            ->first();

        if (! $product) {
            return null;
        }

        return [
            'id' => $product->id,
            'name' => $product->name,
            'price_minor' => $product->price_minor,
            'sku' => $product->sku,
        ];
    }

  /** @return array{id: int|string|null, name: string, price_minor: int, sku: string|null}|null */
    private function lookupRetail(string $ownerRef, string $code): ?array
    {
        try {
            $rows = (array) (CrmClient::for($ownerRef)->products([
                'search' => $code,
                'type' => 'product',
                'active' => 1,
                'per_page' => 25,
            ])['data'] ?? []);
        } catch (\Throwable) {
            return null;
        }

        foreach ($rows as $row) {
            $sku = isset($row['sku']) ? (string) $row['sku'] : '';
            if ($sku !== '' && strcasecmp($sku, $code) === 0) {
                return [
                    'id' => $row['id'] ?? null,
                    'name' => (string) ($row['name'] ?? ''),
                    'price_minor' => (int) ($row['unit_price_minor'] ?? 0),
                    'sku' => $sku,
                ];
            }
        }

        return null;
    }
}