<?php

namespace App\Http\Controllers\Mini;

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

/**
 * 小程序商品
 */
#[RequestAttribute('/mini', 'mini', authGuard: 'users')]
class ProductController extends BaseMiniController
{
    /** 分类树（全部启用分类，含暂无商品的分类） */
    #[GetRoute('/product/categories', authorize: false)]
    public function categories(): JsonResponse
    {
        return $this->success(ProductCategoryModel::getTreeData(['*'], true));
    }

    /**
     * 商品列表（登录门店附 cart_id/cart_quantity 供列表直接加减购物车；
     * data.cart 为购物车悬浮球汇总，未登录返回零值结构）
     */
    #[GetRoute('/product/list', authorize: false)]
    public function products(Request $request): JsonResponse
    {
        $query = ProductModel::query()
            ->where('status', ProductModel::STATUS_ON)
            ->with('category:id,name');

        $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 . '%');
            });
        }

        // 先按分类树展示顺序（与小程序分类栏一致；不在启用分类树中的商品排最后），再按商品排序
        $categoryIds = ProductCategoryModel::getTreeOrderedIds(true);
        if ($categoryIds !== []) {
            $cases = [];
            foreach ($categoryIds as $position => $categoryId) {
                $cases[] = "WHEN {$categoryId} THEN {$position}";
            }
            $query->orderByRaw(
                'CASE category_id ' . implode(' ', $cases) . ' ELSE ' . count($categoryIds) . ' END'
            );
        }

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

        // 当前门店的等级（售价 = 成本价 × (100 + 等级上浮比例) / 100）与购物车行
        $store = $this->optionalStore($request);
        $level = ($store !== null && $store->level_id > 0) ? $store->level : null;
        $cartService = app(CartService::class);
        $cartRows = $store !== null ? $cartService->cartRowMap($store->id) : [];

        $paginator->getCollection()->transform(
            static function (ProductModel $product) use ($level, $cartRows): array {
                $row = $product->toArray();
                // 实际价（按等级上浮比例换算；成本价不随序列化输出）
                $row['price'] = $level !== null
                    ? CustomerLevelModel::calcLevelPrice($product->cost_price, $level->percent)
                    : null;
                // 购物车数量（列表直接加减用；不在购物车为 0/'0.00'）
                $row['cart_id'] = $cartRows[$product->id]['id'] ?? 0;
                $row['cart_quantity'] = $cartRows[$product->id]['quantity'] ?? '0.00';
                return $row;
            }
        );

        $data = $paginator->toArray();
        $data['cart'] = $cartService->summary($store);

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

    /**
     * 商品详情（免登录浏览；登录门店按等级上浮比例显示换算价，未登录/未设等级 price=null）
     */
    #[GetRoute('/product/{id}', authorize: false, where: ['id' => '[0-9]+'])]
    public function detail(int $id, Request $request): JsonResponse
    {
        $product = ProductModel::query()
            ->where('status', ProductModel::STATUS_ON)
            ->with('category:id,name')
            ->find($id);
        if ($product === null) {
            throw new RepositoryException('商品不存在或已下架');
        }

        $price = null;
        $store = $this->optionalStore($request);
        $level = ($store !== null && $store->level_id > 0) ? $store->level : null;
        if ($level !== null) {
            $price = CustomerLevelModel::calcLevelPrice($product->cost_price, $level->percent);
        }

        $cartRows = $store !== null ? app(CartService::class)->cartRowMap($store->id) : [];

        $data = $product->toArray();
        $data['price'] = $price;
        $data['cart_id'] = $cartRows[$product->id]['id'] ?? 0;
        $data['cart_quantity'] = $cartRows[$product->id]['quantity'] ?? '0.00';

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