<?php

namespace App\Http\Controllers\Mini;

use App\Exceptions\RepositoryException;
use App\Models\ProductCategoryModel;
use App\Models\ProductModel;
use App\Models\ProductPriceModel;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Modules\AnnoRoute\Attribute\GetRoute;
use Modules\AnnoRoute\Attribute\RequestAttribute;

/**
 * 小程序商品（分类树 + 列表，价格 = 当前门店客户等级价）
 */
#[RequestAttribute('/mini', 'mini', authGuard: 'users')]
class ProductController extends BaseMiniController
{
    /** 分类树（仅含上架商品的分类及其祖先，保证树结构完整） */
    #[GetRoute('/product/categories', authorize: true)]
    public function categories(): JsonResponse
    {
        $activeCategoryIds = ProductModel::query()
            ->where('status', ProductModel::STATUS_ON)
            ->distinct()
            ->pluck('category_id')
            ->map(static fn ($id) => (int) $id)
            ->filter(static fn (int $id) => $id > 0);

        $categories = ProductCategoryModel::query()
            ->where('status', ProductCategoryModel::STATUS_NORMAL)
            ->get()
            ->keyBy('id');

        // 保留有上架商品的分类 + 其全部祖先
        $keep = [];
        foreach ($activeCategoryIds as $categoryId) {
            $cursor = $categoryId;
            $guard = 0;
            while ($cursor > 0 && $guard++ < 20 && $categories->has($cursor)) {
                $keep[$cursor] = true;
                $cursor = (int) $categories[$cursor]->parent_id;
            }
        }

        $filtered = array_values(array_filter(
            $categories->toArray(),
            static fn (array $item) => isset($keep[$item['id']])
        ));

        return $this->success(ProductCategoryModel::buildTree($filtered));
    }

    /**
     * 商品列表：价格取当前门店客户等级价（未绑等级的门店报错）；
     * ?category_id=&keyword=&page=&pageSize=
     */
    #[GetRoute('/product/list', authorize: true)]
    public function products(Request $request): JsonResponse
    {
        $user = $this->currentUser($request);
        $store = $this->ensureStoreBound($user);
        if ($store->level_id <= 0) {
            throw new RepositoryException('门店未设置客户等级，无法展示价格，请联系客服');
        }

        $query = ProductModel::query()
            ->where('status', ProductModel::STATUS_ON)
            ->with('category:id,name')
            ->with(['prices' => static fn ($q) => $q->where('level_id', $store->level_id)]);

        $categoryId = (int) $request->input('category_id', 0);
        if ($categoryId > 0) {
            $query->where('category_id', $categoryId);
        }
        $keyword = trim((string) $request->input('keyword', ''));
        if ($keyword !== '') {
            $query->where(static function ($q) use ($keyword) {
                $q->where('name', 'like', '%' . $keyword . '%')
                    ->orWhere('spec', 'like', '%' . $keyword . '%');
            });
        }

        $pageSize = (int) $request->input('pageSize', 10);
        $data = $query->orderBy('sort')
            ->orderBy('id')
            ->paginate($pageSize)
            ->toArray();

        // 扁平化价格：prices[0].price → price（未设等级价为 null）
        foreach ($data['data'] as &$row) {
            $row['price'] = $row['prices'][0]['price'] ?? null;
            unset($row['prices']);
        }

        return $this->success($data);
    }
}