<?php

namespace App\Service\business;

use App\BaseApp\BaseService;
use App\Models\business\CatalogueModel;
use App\Models\business\CategoryModel;
use App\Models\business\ImageModel;
use App\Models\business\PriceSheetModel;
use App\Service\common\MediaUrlService;
use Exception;
use Psr\Container\ContainerExceptionInterface;
use Psr\Container\NotFoundExceptionInterface;

/**
 * 商品图册
 */
class CatalogueService extends BaseService
{
    private MediaUrlService $media;

    public function __construct()
    {
        parent::__construct();
        $this->model = CatalogueModel::class;
        $this->selectField = ['id', 'title', 'category_id', 'cover', 'pdf', 'price', 'alias', 'identifier', 'status', 'created_at', 'updated_at'];
        $this->queryField = ['title' => 'like', 'alias' => 'like', 'identifier' => 'like', 'status' => '='];
        $this->media = MediaUrlService::getInstance();
    }

    /**
     * 列表
     *
     * 两处沿用老行为：
     *   1. 按分类筛选时连同该分类的子分类一起查，否则选了父分类会一条都搜不到
     *   2. 报价单里 6 个历史材质列绝大多数为空，只把有值的列名回给前端（show_field），
     *      前端据此决定表格显示哪几列
     * @throws ContainerExceptionInterface
     * @throws NotFoundExceptionInterface
     */
    public function list(): array
    {
        $this->with = ['category', 'priceSheet'];

        $categoryId = (int) request()->get('category_id', 0);
        if ($categoryId > 0) {
            $ids = CategoryModel::where('pid', $categoryId)->where('deleted_at', 0)->pluck('id')->all();
            $ids[] = $categoryId;
            $this->whereIn = ['category_id', $ids];
        }

        $result = $this->getPageList();
        foreach ($result['items'] as &$item) {
            $item['category_name'] = $item['category']['name'] ?? '';
            unset($item['category']);
            $item['cover'] = $this->media->toPublic($item['cover'] ?? '');
            $item['pdf'] = $this->media->toPublic($item['pdf'] ?? '');
            $item['show_field'] = $this->pickUsedMaterialFields($item['price_sheet'] ?? []);
        }
        unset($item);
        return $result;
    }

    public function option(): mixed
    {
        $this->optionField = ['id', 'title as name', 'identifier'];
        return $this->getOption();
    }

    /**
     * 详情，带规格与两类相册
     * @throws Exception
     */
    public function detail($id): mixed
    {
        $info = $this->getDetail($id);
        $info->cover = $this->media->toPublic($info->cover);
        $info->pdf = $this->media->toPublic($info->pdf);

        $priceSheet = PriceSheetModel::where('catalogue_id', $id)
            ->where('deleted_at', 0)
            ->orderBy('id')
            ->get()
            ->toArray();
        $info->show_field = $this->pickUsedMaterialFields($priceSheet);
        $info->price_sheet = $priceSheet;
        $info->render_images = $this->imagesOf($id, ImageModel::TYPE_RENDER);
        $info->physical_images = $this->imagesOf($id, ImageModel::TYPE_PHYSICAL);
        return $info;
    }

    public function create($params): mixed
    {
        $params = $this->normalize($params);
        $this->assertIdentifierUnique((string) ($params['identifier'] ?? ''));
        return $this->insert($params);
    }

    /**
     * @throws Exception
     */
    public function update($id, $params): mixed
    {
        $params = $this->normalize($params);
        if (array_key_exists('identifier', $params)) {
            $this->assertIdentifierUnique((string) $params['identifier'], (int) $id);
        }
        return $this->save($id, $params);
    }

    /**
     * 删除商品：连带软删它的规格与相册，否则会留下一堆查不到主体的孤儿数据
     * @throws Exception
     */
    public function delete($id): mixed
    {
        $ids = array_values(array_filter(array_map('intval', is_array($id) ? $id : [$id])));
        if (empty($ids)) {
            $this->utils->errorThrow('参数错误');
        }
        $now = time();
        PriceSheetModel::whereIn('catalogue_id', $ids)->where('deleted_at', 0)
            ->update(['deleted_at' => $now, 'updated_at' => $now]);
        ImageModel::whereIn('catalogue_id', $ids)->where('deleted_at', 0)
            ->update(['deleted_at' => $now, 'updated_at' => $now]);
        return $this->del($ids);
    }

    /**
     * @throws Exception
     */
    public function status($id, $status): mixed
    {
        return $this->save($id, ['status' => (int) $status]);
    }

    /**
     * 报价单里真正有值的材质列
     */
    private function pickUsedMaterialFields(array $priceSheetRows): array
    {
        $used = [];
        foreach ($priceSheetRows as $row) {
            foreach (PriceSheetModel::MATERIAL_FIELDS as $field) {
                if (!empty($row[$field] ?? '')) {
                    $used[$field] = true;
                }
            }
        }
        return array_keys($used);
    }

    private function imagesOf(int|string $catalogueId, int $type): array
    {
        $rows = ImageModel::where('catalogue_id', $catalogueId)
            ->where('type', $type)
            ->where('deleted_at', 0)
            ->orderBy('id')
            ->get(['id', 'url', 'type'])
            ->toArray();
        $this->media->publicEach($rows, ['url']);
        return $rows;
    }

    private function normalize(array $params): array
    {
        foreach (['cover', 'pdf'] as $field) {
            if (array_key_exists($field, $params)) {
                $params[$field] = $this->media->firstOf($params[$field]);
            }
        }
        return $params;
    }

    /**
     * 商品编号是小程序搜索和线下对单的依据，重复了就没法定位货品
     * @throws Exception
     */
    private function assertIdentifierUnique(string $identifier, int $exceptId = 0): void
    {
        $identifier = trim($identifier);
        if ($identifier === '') {
            return;
        }
        $exists = CatalogueModel::where('identifier', $identifier)
            ->where('deleted_at', 0)
            ->when($exceptId > 0, fn ($q) => $q->where('id', '<>', $exceptId))
            ->exists();
        if ($exists) {
            $this->utils->errorThrow('商品编号已存在：' . $identifier);
        }
    }
}