<?php

namespace plugin\saiadmin\app\service;

use plugin\saiadmin\exception\ApiException;
use support\think\Db;

/** 设备筛选和分成使用同一份数据库字典；每次请求读取，字典修改立即生效。 */
class DeviceProductCatalog
{
    public function categories(): array
    {
        $products = $this->dictionary('device_product');
        $mappings = $this->dictionary('device_type_product');
        $typesByProduct = [];
        $mappedTypes = [];
        foreach ($mappings as $mapping) {
            if (!ctype_digit((string) $mapping['value']) || (int) $mapping['value'] < 1) {
                throw new ApiException('设备类型产品映射的键值必须为有效设备类型编号');
            }
            $type = (int) $mapping['value'];
            if (isset($mappedTypes[$type])) {
                throw new ApiException('设备类型产品映射存在重复编号，请检查数据字典');
            }
            $mappedTypes[$type] = true;
            $typesByProduct[$mapping['label']][] = $type;
        }
        $categories = [];
        $productCodes = [];
        foreach ($products as $product) {
            $code = (string) $product['value'];
            if ($code === '' || isset($productCodes[$code])) {
                throw new ApiException('设备产品编码为空或重复，请检查数据字典');
            }
            $productCodes[$code] = true;
            if (!empty($typesByProduct[$code])) {
                $categories[] = ['value' => $code, 'label' => $product['label'], 'goods_types' => $typesByProduct[$code]];
            }
        }
        return $categories;
    }

    private function dictionary(string $code): array
    {
        return Db::table('sa_system_dict_data')->alias('d')
            ->join('sa_system_dict_type t', 't.id=d.type_id')
            ->where('t.code', $code)->where('t.status', 1)->whereNull('t.delete_time')
            ->where('d.status', 1)->whereNull('d.delete_time')
            ->field('d.label,d.value')->order('d.sort', 'desc')->order('d.id', 'asc')->select()->toArray();
    }
}