<?php

namespace App\Service\CodeGeneration;

use App\BaseApp\BaseService;
use App\Models\ProductImageModel;
use App\Models\ProductModel;
use Exception;
use Illuminate\Support\Facades\DB;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\NotFoundExceptionInterface;

class ProductService extends BaseService
{
    public function __construct()
    {
        parent::__construct();
        $this->selectField = ["id", "title", "mall_id", "user_id", "introduction", "cover", "description", "quantity_sold", "price", "classification_id", "status", "created_at", "updated_at", "deleted_at"];
        $this->queryField = ['title' => 'like','mall_id' => '=','classification_id' => '=,status='];
        $this->model = ProductModel::class;
        $this->with = [
            'images:id,product_id,url'
        ];
    }

    /**
     * 获取产品列表
     * @return array
     * @throws ContainerExceptionInterface
     * @throws NotFoundExceptionInterface
     */
    public function list(): array
    {
        $result = $this->getPageList();
        foreach ($result['items'] as &$v) {
            $v['images'] = array_column($v['images'], 'url');
        }
        return $result;
    }

    /**
     * 获取产品详情
     * @param $id
     * @return mixed
     * @throws Exception
     */
    public function detail($id)
    {
        return $this->getDetail($id);
    }

    /**
     * 产品下拉列表
     * @return mixed
     */
    public function option()
    {
        $this->optionField = ['id', 'name'];
        return $this->getOption();
    }

    /**
     * 创建产品
     * @param $params
     * @return mixed
     * @throws Exception
     */
    public function create($params): mixed
    {
        $images = $params['images'];
        unset($params['images']);
        $params['user_id'] = $this->userId;
        DB::beginTransaction();
        try {

            $result = $this->insert($params);
            $insertData = [];
            foreach ($images as $v) {
                $insertData[] = [
                    'product_id' => $result,
                    'url' => $v
                ];
            }
            $imageModel = ProductImageModel::insert($insertData);
            DB::commit();
        } catch (Exception $e) {
            DB::rollBack();
            $this->utils->errorThrow($e->getMessage());
        }
        return $imageModel;
    }

    /**
     * 编辑产品
     * @param $id
     * @param $params
     * @return mixed
     * @throws Exception
     */
    public function update($id, $params): mixed
    {
        DB::beginTransaction();
        try {
            $images = $params['images'];
            unset($params['images']);
            // 1. 更新产品基本信息
            $model = $this->save($id, $params);

            // 2. 处理图片逻辑
            if (isset($images)) {
                $newImages = $images;

                // 获取当前产品已有的图片URL列表
                $existingImages = ProductImageModel::where('product_id', $id)
                    ->pluck('url')
                    ->toArray();

                // 计算新增的图片和被删除的图片
                $addedImages = array_diff($newImages, $existingImages);
                $deletedImages = array_diff($existingImages, $newImages);

                // 删除不再需要的图片记录
                if (!empty($deletedImages)) {
                    ProductImageModel::where('product_id', $id)
                        ->whereIn('url', $deletedImages)
                        ->delete();
                }

                // 添加新图片记录
                if (!empty($addedImages)) {
                    $insertData = [];
                    foreach ($addedImages as $url) {
                        $insertData[] = [
                            'product_id' => $id,
                            'url' => $url
                        ];
                    }
                    ProductImageModel::insert($insertData);
                }
            }

            DB::commit();
        } catch (Exception $e) {
            DB::rollBack();
            $this->utils->errorThrow($e->getMessage());
        }

        // 返回更新后的产品信息
        return $model;
    }

    /**
     * 删除产品
     * @param $ids
     * @return mixed|true
     * @throws Exception
     */
    public function delete($ids): mixed
    {
        return $this->del($ids);
    }

}