<?php

namespace App\Http\Controllers\Purchase;

use App\Exceptions\RepositoryException;
use App\Exports\PurchaseOrderExport;
use App\Exports\PurchaseStoreExport;
use App\Exports\PurchaseSupplierExport;
use App\Http\Requests\Purchase\PurchaseBillGenerateRequest;
use App\Http\Requests\Purchase\PurchaseCellUpdateRequest;
use App\Http\Requests\Purchase\PurchaseRowUpdateRequest;
use App\Http\Requests\Purchase\PurchaseStoreItemRequest;
use App\Models\BillModel;
use App\Models\CustomerLevelModel;
use App\Models\ProductModel;
use App\Models\PurchaseItemCheckModel;
use App\Models\PurchaseOrderModel;
use App\Models\StoreModel;
use App\Models\StoreOrderItemModel;
use App\Models\StoreOrderModel;
use App\Models\SupplierModel;
use App\Services\BillGenerateService;
use App\Services\ItemImageResolver;
use App\Services\PurchaseGenerateService;
use App\Services\PurchaseItemService;
use App\Services\WeightEstimator;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Maatwebsite\Excel\Facades\Excel;
use Modules\AnnoRoute\Attribute\DeleteRoute;
use Modules\AnnoRoute\Attribute\GetRoute;
use Modules\AnnoRoute\Attribute\PostRoute;
use Modules\AnnoRoute\Attribute\PutRoute;
use Modules\AnnoRoute\Attribute\RequestAttribute;
use Modules\Common\Http\Controllers\BaseController;
use Symfony\Component\HttpFoundation\Response;
use Throwable;

/**
 * 采购单管理
 */
#[RequestAttribute('/purchase/order', 'purchase.order')]
class PurchaseOrderController extends BaseController
{
    protected array $searchField = [
        'status' => '=',
        'purchase_no' => 'like',
        'purchase_date' => 'betweenDate',
    ];

    /** 采购单列表 */
    #[GetRoute(authorize: 'query')]
    public function query(Request $request): JsonResponse
    {
        $params = $request->all();
        $pageSize = $params['pageSize'] ?? 10;
        $data = $this->buildSearch($params, PurchaseOrderModel::query()->with('operator:id,nickname'))
            ->orderBy('purchase_date', 'desc')
            ->orderBy('id', 'desc')
            ->paginate($pageSize)
            ->toArray();
        return $this->success($data);
    }

    /**
     * 采购单详情
     */
    #[GetRoute(route: '/{id}', authorize: 'query', where: ['id' => '[0-9]+'])]
    public function detail(int $id): JsonResponse
    {
        $purchase = PurchaseOrderModel::with('operator:id,nickname')->find($id);
        if (empty($purchase)) {
            return $this->error('采购单不存在');
        }

        // 订货明细
        $orderItems = StoreOrderItemModel::query()
            ->join('store_order', 'store_order.id', '=', 'store_order_item.order_id')
            ->where('store_order_item.purchase_id', $purchase->id)
            ->whereNull('store_order.deleted_at')
            ->with('supplier:id,name')
            ->select('store_order_item.*')
            ->get()
            ->makeVisible('cost_price');

        // 门店列（含软删除门店，保证历史单据可见）
        $stores = StoreModel::withTrashed()
            ->whereIn('id', $orderItems->pluck('store_id')->unique())
            ->get(['id', 'name'])
            ->map(static fn (StoreModel $store) => ['id' => $store->id, 'name' => $store->name])
            ->values();

        // 排序键：分类 sort → 商品 sort
        $products = ProductModel::withTrashed()
            ->with('category:id,sort')
            ->whereIn('id', $orderItems->pluck('product_id')->unique())
            ->get()
            ->keyBy('id');

        $rows = [];
        foreach ($orderItems->groupBy('product_id') as $productId => $group) {
            $first = $group->first();
            // 商品
            $product = $products->get((int) $productId);
            // 采购总数
            $quantity = 0;
            // 采购总重量
            $weight = '0';
            // 采购总金额（Σ明细 amount，单价按 金额÷数量 加权）
            $amount = '0';
            // 门店明细
            $cellsMap  = [];

            foreach ($group as $item) {
                $storeId = $item->store_id;
                // 累加总量
                $quantity += (int) $item->quantity;
                $weight = bcadd($weight, (string) $item->weight, 3);
                $amount = bcadd($amount, (string) $item->amount, 2);

                // 按门店合并
                if (!isset($cellsMap[$storeId])) {
                    $cellsMap[$storeId] = 0;
                }

                $cellsMap[$storeId] += (int) $item->quantity;
            }

            // 供应商
            $supplier =  $first->supplier ? ['id' => $first->supplier->id, 'name' => $first->supplier->name] : null;
            $rows[] = [
                'product_id' => (int) $productId,
                'product_name' => $first->product_name,         // 品名
                'product_spec' => $first->product_spec,         // 包规
                'unit' => $first->unit,                         // 单位
                'supplier_id' => (int) $first->supplier_id,     // 供应商id
                'supplier' => $supplier,                        // 供应商
                'market' => (string) ($product?->market ?? ''), // 市场（取商品档案）
                'cost_price' => $first->cost_price,             // 成本价
                'quantity' => $quantity,
                'weight' => (float) $weight,
                'amount' => $amount,
                'cells' => $cellsMap,
                'category_sort' => (int) ($product->category->sort ?? 9999),
                'product_sort' => (int) ($product->sort ?? 9999),
            ];
        }
        usort($rows, static fn (array $a, array $b): int =>
            [$a['category_sort'], $a['product_sort'], $a['product_id']]
            <=> [$b['category_sort'], $b['product_sort'], $b['product_id']]);

        // 门店账单：采购单完成后按门店生成（含软删除门店，保证历史单据可见）
        $bills = BillModel::query()
            ->where('purchase_id', $purchase->id)
            ->with('store:id,name')
            ->orderBy('id')
            ->get()
            ->map(static function (BillModel $bill): array {
                $row = $bill->toArray();
                $row['store_name'] = $bill->store->name ?? ('门店#' . $bill->store_id);
                $row['order_count'] = $bill->orders()->count();
                unset($row['store']);
                return $row;
            })
            ->values()
            ->toArray();

        return $this->success([
            'purchase' => $purchase->toArray(),
            'stores' => $stores->toArray(),
            'items' => array_map(static function (array $row): array {
                unset($row['category_sort'], $row['product_sort']);
                return $row;
            }, $rows),
            'bills' => $bills,
            // 单品「已对账」标记（入库持久化，商品ID列表）
            'checked_product_ids' => PurchaseItemCheckModel::query()
                ->where('purchase_id', $purchase->id)
                ->pluck('product_id')
                ->map(static fn ($v) => (int) $v)
                ->all(),
        ]);
    }

    /** 修改采购单信息（采购日期、实际金额、备注） */
    #[PutRoute(route: '/{id}', authorize: 'update', where: ['id' => '[0-9]+'])]
    public function update(int $id, Request $request): JsonResponse
    {
        $data = $request->validate([
            'actual_amount' => 'required|numeric|min:0',
            'remark' => 'nullable|string|max:255',
        ], [
            'actual_amount.required' => '实际金额不能为空',
            'actual_amount.numeric' => '实际金额格式错误',
            'actual_amount.min' => '实际金额不能小于0',
            'remark.max' => '备注超过最大长度',
        ]);
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        if ($purchase->status !== PurchaseOrderModel::STATUS_PENDING) {
            throw new RepositoryException('采购单已完成，不允许修改信息');
        }
        $purchase->update(array_filter($data, static fn ($v) => $v !== null));
        return $this->success();
    }

    /**
     * 完成采购单
     * @throws
     */
    #[PutRoute(route: '/{id}/finish', authorize: 'update', where: ['id' => '[0-9]+'])]
    public function finish(int $id): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        if ($purchase->status !== PurchaseOrderModel::STATUS_PENDING) {
            throw new RepositoryException('采购单已完成，不允许修改信息');
        }

        return DB::transaction(function () use ($purchase) {
            // 修改采购单状态
            $purchase->status = PurchaseOrderModel::STATUS_COMPLETED;
            $purchase->save();
            // 修改所有订单状态为配送中
            StoreOrderModel::where('purchase_id', $purchase->id)->update([
                'status' => StoreOrderModel::STATUS_DISTRIBUTION
            ]);

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


    }

    /**
     * 生成采购单
     */
    #[PostRoute('/generate', 'generate')]
    public function generate(Request $request): JsonResponse
    {
        $data = $request->validate([
            'purchase_date' => 'required|date_format:Y-m-d',
            'order_ids' => 'sometimes|array|min:1',
            'order_ids.*' => 'integer|exists:store_order,id',
        ], [
            'purchase_date.required' => '请选择采购日期',
            'purchase_date.date_format' => '采购日期格式为 Y-m-d',
            'order_ids.min' => '请选择要合并的订单',
            'order_ids.*.exists' => '订单不存在',
        ]);

        $purchase = app(PurchaseGenerateService::class)->generate(
            $data['purchase_date'],
            (int) $request->user()->id,
            array_map('intval', $data['order_ids'] ?? []),
        );

        return $this->success(
            ['id' => $purchase->id, 'purchase_no' => $purchase->purchase_no],
            '采购单已生成'
        );
    }

    /**
     * 导出采购单商品明细 Excel 表格（系统全部商品行，支持按供应商筛选）
     *
     * @throws
     */
    #[GetRoute(route: '/{id}/export', authorize: 'export', where: ['id' => '[0-9]+'])]
    public function export(int $id, Request $request): Response
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $supplierId = (int) $request->query('supplier_id', 0);

        $filename = $purchase->purchase_no . '_采购单.xlsx';
        if ($supplierId > 0) {
            $supplier = SupplierModel::withTrashed()->find($supplierId);
            $filename = $purchase->purchase_no . '_采购单_' . ($supplier->name ?? ('供应商' . $supplierId)) . '.xlsx';
        }

        return Excel::download(new PurchaseOrderExport($purchase, $supplierId), $filename);
    }

    /**
     * 导出门店购买详情（多工作表：每门店一个工作表；?store_id= 单门店导出）
     */
    #[GetRoute(route: '/{id}/exportStores', authorize: 'export', where: ['id' => '[0-9]+'])]
    public function exportStores(int $id, Request $request): Response
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $storeId = (int) $request->query('store_id', 0);

        $filename = $purchase->purchase_no . '_门店购买详情.xlsx';
        if ($storeId > 0) {
            $store = StoreModel::withTrashed()->find($storeId);
            $filename = $purchase->purchase_no . '_门店购买详情_' . ($store->name ?? ('门店' . $storeId)) . '.xlsx';
        }

        return Excel::download(new PurchaseStoreExport($purchase, $storeId), $filename);
    }

    /**
     * 导出供应商采购明细（多工作表：每供应商一个工作表；?supplier_id= 单供应商导出）
     */
    #[GetRoute(route: '/{id}/exportSuppliers', authorize: 'export', where: ['id' => '[0-9]+'])]
    public function exportSuppliers(int $id, Request $request): Response
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $supplierId = (int) $request->query('supplier_id', 0);

        $filename = $purchase->purchase_no . '_供应商采购明细.xlsx';
        if ($supplierId > 0) {
            $supplier = SupplierModel::withTrashed()->find($supplierId);
            $filename = $purchase->purchase_no . '_供应商采购明细_' . ($supplier->name ?? ('供应商' . $supplierId)) . '.xlsx';
        }

        return Excel::download(new PurchaseSupplierExport($purchase, $supplierId), $filename);
    }

    /**
     * 单元格下钻：采购单中某门店某商品的全部订货明细
     */
    #[GetRoute(route: '/{id}/cell', authorize: 'query', where: ['id' => '[0-9]+'])]
    public function cell(int $id, Request $request): JsonResponse
    {
        $productId = (int) $request->query('product_id', 0);
        $storeId = (int) $request->query('store_id', 0);
        if ($productId <= 0 || $storeId <= 0) {
            throw new RepositoryException('缺少商品或门店参数');
        }
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }

        $items = StoreOrderItemModel::query()
            ->join('store_order', 'store_order.id', '=', 'store_order_item.order_id')
            ->where('store_order_item.purchase_id', $purchase->id)
            ->where('store_order_item.product_id', $productId)
            ->where('store_order_item.store_id', $storeId)
            ->whereNull('store_order.deleted_at')
            ->with('supplier:id,name')
            ->select(
                'store_order_item.*',
                'store_order.order_no',
                'store_order.order_date',
                'store_order.status as order_status',
            )
            ->orderBy('store_order.id')
            ->get()
            ->makeVisible('cost_price');

        $rows = [];
        foreach ($items as $item) {
            $rows[] = [
                'id' => $item->id,
                'order_id' => $item->order_id,
                'order_no' => $item->order_no,
                'order_date' => (string) $item->order_date,
                'order_status' => (int) $item->order_status,
                'product_name' => $item->product_name,
                'product_spec' => $item->product_spec,
                'unit' => $item->unit,
                'supplier_id' => (int) $item->supplier_id,
                'supplier' => $item->supplier ? ['id' => $item->supplier->id, 'name' => $item->supplier->name] : null,
                'price' => (string) $item->price,
                'cost_price' => (string) $item->cost_price,
                'quantity' => (int) $item->quantity,
                'weight' => (string) $item->weight,
                'amount' => (string) $item->amount,
                'remark' => (string) $item->remark,
                'image_ids' => $item->image_ids,
            ];
        }
        app(ItemImageResolver::class)->resolve($rows);

        $store = StoreModel::withTrashed()->find($storeId);
        $product = ProductModel::withTrashed()->find($productId);

        return $this->success([
            'store' => $store ? ['id' => $store->id, 'name' => $store->name] : null,
            'product' => $product ? ['id' => $product->id, 'name' => $product->name] : null,
            'items' => $rows,
        ]);
    }

    /**
     * 门店购买详情：采购单内指定门店的采购汇总（按商品聚合）
     * 单价为加权平均口径（Σ金额÷Σ数量），保证 单价×数量=预计金额
     */
    #[GetRoute(route: '/{id}/store', authorize: 'query', where: ['id' => '[0-9]+'])]
    public function storeSummary(int $id, Request $request): JsonResponse
    {
        $storeId = (int) $request->query('store_id', 0);
        if ($storeId <= 0) {
            throw new RepositoryException('缺少门店参数');
        }
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }

        $store = StoreModel::withTrashed()->find($storeId);

        return $this->success([
            'store' => $store ? ['id' => $store->id, 'name' => $store->name] : null,
            'items' => app(PurchaseItemService::class)->storeSummaryRows($purchase->id, $storeId),
        ]);
    }

    /**
     * 门店购买详情：新增单品（挂靠该门店在采购单中的最新一笔订单，
     * 单价按门店等级上浮比例换算，无等级按成本价兜底）
     *
     * @throws Throwable
     */
    #[PostRoute(route: '/{id}/store/{storeId}/item', authorize: 'update', where: ['id' => '[0-9]+', 'storeId' => '[0-9]+'])]
    public function storeItemStore(int $id, int $storeId, PurchaseStoreItemRequest $request): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $this->assertPurchaseEditable($purchase);

        $validated = $request->validated();
        $productId = (int) $validated['product_id'];
        $product = ProductModel::find($productId);
        if ($product === null) {
            throw new RepositoryException('商品不存在或已被删除，无法添加');
        }

        return DB::transaction(function () use ($purchase, $storeId, $product, $validated) {
            // 该门店在采购单中的最新一笔订单
            $order = StoreOrderModel::query()
                ->where('purchase_id', $purchase->id)
                ->where('store_id', $storeId)
                ->orderByDesc('id')
                ->lockForUpdate()
                ->first();
            if ($order === null) {
                throw new RepositoryException('该门店不在此采购单中，无法添加单品');
            }

            $duplicated = StoreOrderItemModel::query()
                ->where('purchase_id', $purchase->id)
                ->where('store_id', $storeId)
                ->where('product_id', $product->id)
                ->exists();
            if ($duplicated) {
                throw new RepositoryException('该商品已在此门店采购明细中，请直接修改数量');
            }

            // 单价：门店等级上浮换算价（无等级按成本价兜底）
            $store = StoreModel::withTrashed()->find($storeId);
            $level = ($store !== null && $store->level_id > 0) ? $store->level : null;
            $price = $level !== null
                ? CustomerLevelModel::calcLevelPrice($product->cost_price, $level->percent)
                : bcadd((string) $product->cost_price, '0', 2);
            $quantity = (int) $validated['quantity'];

            $item = StoreOrderItemModel::create([
                'order_id' => $order->id,
                'purchase_id' => $purchase->id,
                'bill_id' => 0,
                'store_id' => $storeId,
                'product_id' => $product->id,
                'category_id' => (int) $product->category_id,
                'supplier_id' => (int) $product->supplier_id,
                'product_name' => $product->name,
                'product_spec' => $product->spec,
                'unit' => (string) $product->unit,
                'price' => $price,
                'image_ids' => implode(',', (array) $product->image_ids),
                'content' => (string) $product->content,
                'shelf_life' => (int) $product->shelf_life,
                'quantity' => $quantity,
                // 未传称重时按订货量 × 规格预填参考重量
                'weight' => isset($validated['weight'])
                    ? bcadd((string) $validated['weight'], '0', 3)
                    : WeightEstimator::estimate((string) $product->spec, (string) $product->unit, (string) $quantity),
                'amount' => bcmul($price, (string) $quantity, 2),
                'cost_price' => (string) $product->cost_price,
                'remark' => '',
            ]);

            $service = app(PurchaseItemService::class);
            $service->recalcOrder($order->id);
            $service->recalcPurchase($purchase->id);

            return $this->success(['id' => $item->id], '已添加单品');
        });
    }

    /**
     * 门店购买详情：修改单品（数量/称重/单价）；同门店同商品多笔订单明细时合并到最早一条
     *
     * @throws Throwable
     */
    #[PutRoute(route: '/{id}/store/{storeId}/item/{productId}', authorize: 'update', where: ['id' => '[0-9]+', 'storeId' => '[0-9]+', 'productId' => '[0-9]+'])]
    public function storeItemUpdate(int $id, int $storeId, int $productId, PurchaseStoreItemRequest $request): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $this->assertPurchaseEditable($purchase);

        $validated = $request->validated();

        return DB::transaction(function () use ($purchase, $storeId, $productId, $validated) {
            $items = StoreOrderItemModel::query()
                ->where('purchase_id', $purchase->id)
                ->where('store_id', $storeId)
                ->where('product_id', $productId)
                ->orderBy('id')
                ->lockForUpdate()
                ->get();
            if ($items->isEmpty()) {
                throw new RepositoryException('该门店在此采购单中无此商品明细');
            }

            $affectedOrderIds = $items->pluck('order_id')->unique()->all();

            // 多笔订单明细合并到最早一条
            $survivor = $items->first();
            foreach ($items->skip(1) as $extra) {
                $extra->delete();
            }

            $survivor->quantity = (int) $validated['quantity'];
            if (isset($validated['price'])) {
                $survivor->price = bcadd((string) $validated['price'], '0', 2);
            }
            if (isset($validated['weight'])) {
                $survivor->weight = bcadd((string) $validated['weight'], '0', 3);
            }
            $survivor->amount = bcmul((string) $survivor->quantity, (string) $survivor->price, 2);
            $survivor->save();

            $service = app(PurchaseItemService::class);
            foreach ($affectedOrderIds as $orderId) {
                $service->recalcOrder((int) $orderId);
            }
            $service->recalcPurchase($purchase->id);

            return $this->success([], '单品已更新');
        });
    }

    /**
     * 门店购买详情：移除单品（该门店此商品的全部订货明细一并删除）
     *
     * @throws Throwable
     */
    #[DeleteRoute(route: '/{id}/store/{storeId}/item/{productId}', authorize: 'update', where: ['id' => '[0-9]+', 'storeId' => '[0-9]+', 'productId' => '[0-9]+'])]
    public function storeItemDelete(int $id, int $storeId, int $productId): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $this->assertPurchaseEditable($purchase);

        DB::transaction(function () use ($purchase, $storeId, $productId) {
            $items = StoreOrderItemModel::query()
                ->where('purchase_id', $purchase->id)
                ->where('store_id', $storeId)
                ->where('product_id', $productId)
                ->lockForUpdate()
                ->get();
            if ($items->isEmpty()) {
                throw new RepositoryException('该门店在此采购单中无此商品明细');
            }

            $affectedOrderIds = $items->pluck('order_id')->unique()->all();
            foreach ($items as $item) {
                $item->delete();
            }

            $service = app(PurchaseItemService::class);
            foreach ($affectedOrderIds as $orderId) {
                $service->recalcOrder((int) $orderId);
            }
            $service->recalcPurchase($purchase->id);
        });

        return $this->success([], '已移除单品');
    }

    /**
     * 账单生成预览
     */
    #[GetRoute(route: '/{id}/bill/prepare', authorize: 'query', where: ['id' => '[0-9]+'])]
    public function billPrepare(int $id): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }

        $orders = StoreOrderModel::query()
            ->where('purchase_id', $purchase->id)
            ->whereNull('deleted_at')
            ->orderBy('id')
            ->get(['id', 'store_id', 'total_amount']);

        $stores = StoreModel::withTrashed()
            ->whereIn('id', $orders->pluck('store_id')->unique())
            ->get(['id', 'name'])
            ->keyBy('id');

        $bills = BillModel::query()
            ->where('purchase_id', $purchase->id)
            ->get()
            ->keyBy('store_id');

        $boxPrice = number_format((float) site_config('services.box_amount', 0), 2);
        $trayPrice = number_format((float) site_config('services.tray_amount', 0), 2);

        $rows = [];
        foreach ($orders->groupBy('store_id') as $storeId => $storeOrders) {
            $productAmount = $storeOrders->reduce(
                static fn (string $carry, StoreOrderModel $order): string => bcadd($carry, (string) $order->total_amount, 2),
                '0'
            );
            $bill = $bills->get((int) $storeId);
            $rows[] = [
                'store_id' => (int) $storeId,
                'store_name' => $stores->get((int) $storeId)->name ?? ('门店#' . $storeId),
                'order_count' => $storeOrders->count(),
                'product_amount' => $productAmount,
                'box_price' => $boxPrice,
                'tray_price' => $trayPrice,
                'bill' => $bill?->toArray(),
            ];
        }

        return $this->success([
            'purchase' => $purchase->only(['id', 'purchase_no', 'status']),
            'stores' => $rows,
        ]);
    }

    /**
     * 生成账单
     * @throws Throwable
     */
    #[PostRoute(route: '/{id}/bill', authorize: 'bill', where: ['id' => '[0-9]+'])]
    public function generateBill(int $id, PurchaseBillGenerateRequest $request): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        if ($purchase->status !== PurchaseOrderModel::STATUS_COMPLETED) {
            throw new RepositoryException('采购单未完成，不允许生成账单');
        }

        $bills = app(BillGenerateService::class)->generate(
            $purchase,
            $request->validated()['stores'],
            (int) $request->user()->id,
        );

        return $this->success(['count' => count($bills)], '已生成 ' . count($bills) . ' 张门店账单');
    }

    /**
     * 商品行修改：品名/供应商/包规/单位/成本（同步更新商品档案；商品已删除则跳过档案同步）
     * 成本价变化时，按各门店客户等级的上浮比例重算明细单价与金额（无等级按成本价兜底），
     * 并级联重算涉及订单与采购单汇总
     * @throws Throwable
     */
    #[PutRoute(route: '/{id}/row/{productId}', authorize: 'update', where: ['id' => '[0-9]+', 'productId' => '[0-9]+'])]
    public function updateRow(int $id, int $productId, PurchaseRowUpdateRequest $request): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $this->assertPurchaseEditable($purchase);

        $validated = $request->validated();

        return DB::transaction(function () use ($purchase, $productId, $validated) {
            $items = StoreOrderItemModel::query()
                ->where('purchase_id', $purchase->id)
                ->where('product_id', $productId)
                ->lockForUpdate()
                ->get();
            if ($items->isEmpty()) {
                throw new RepositoryException('该采购单下无此商品的订货明细');
            }

            // 成本价是否变化（未变化时保留明细单价，避免覆盖单元格/单品的手工改价）
            $newCost = bcadd((string) $validated['cost_price'], '0', 2);
            $costChanged = bccomp($newCost, bcadd((string) $items->first()->cost_price, '0', 2), 2) !== 0;

            // 成本变化 → 按门店等级上浮比例重算单价（一次性取回涉及门店的等级，避免逐行查询）
            $levelPercents = [];
            if ($costChanged) {
                $levelPercents = StoreModel::withTrashed()
                    ->with('level:id,percent')
                    ->whereIn('id', $items->pluck('store_id')->unique())
                    ->get(['id', 'level_id'])
                    ->mapWithKeys(static fn (StoreModel $store) => [
                        $store->id => (float) ($store->level?->percent ?? 0),
                    ])
                    ->all();
            }

            foreach ($items as $item) {
                $item->fill($validated);
                if ($costChanged) {
                    $item->price = CustomerLevelModel::calcLevelPrice(
                        $newCost,
                        $levelPercents[(int) $item->store_id] ?? 0,
                    );
                    $item->amount = bcmul($item->price, (string) $item->quantity, 2);
                }
                $item->save();
            }

            // 同步保存到商品档案（软删除商品跳过，明细照常更新）
            $product = ProductModel::find($productId);
            $productSynced = $product !== null;
            if ($productSynced) {
                $product->update([
                    'name' => $validated['product_name'],
                    'supplier_id' => $validated['supplier_id'],
                    'spec' => $validated['product_spec'],
                    'unit' => $validated['unit'],
                    'cost_price' => $validated['cost_price'],
                ]);
            }

            $service = app(PurchaseItemService::class);
            // 成本变化会引起明细金额变动，涉及订单需逐一重算
            if ($costChanged) {
                foreach ($items->pluck('order_id')->unique() as $orderId) {
                    $service->recalcOrder((int) $orderId);
                }
            }
            $service->recalcPurchase($purchase->id);

            $message = '已同步 ' . $items->count() . ' 条订货明细'
                . ($productSynced ? '与商品档案' : '；商品已删除，档案未同步')
                . ($costChanged ? '；门店单价已按等级上浮比例重算' : '');

            return $this->success(['count' => $items->count()], $message);
        });
    }

    /**
     * 门店订单明细修改（订货量、重量、单价），自动重算价格
     * @throws Throwable
     */
    #[PutRoute(route: '/cell/{itemId}', authorize: 'update', where: ['itemId' => '[0-9]+'])]
    public function cellUpdate(int $itemId, PurchaseCellUpdateRequest $request): JsonResponse
    {
        $validated = $request->validated();

        return DB::transaction(function () use ($itemId, $validated) {
            $item = StoreOrderItemModel::query()->lockForUpdate()->find($itemId);
            if (empty($item) || (int) $item->purchase_id === 0) {
                throw new RepositoryException('采购单明细不存在');
            }
            $purchase = PurchaseOrderModel::find((int) $item->purchase_id);
            if (empty($purchase)) {
                throw new RepositoryException('采购单不存在');
            }
            $this->assertPurchaseEditable($purchase);

            $item->quantity = $validated['quantity'];
            $item->price = $validated['price'];
            if (array_key_exists('weight', $validated)) {
                $item->weight = bcadd((string) $validated['weight'], '0', 3);
            }
            $item->amount = bcmul((string) $validated['quantity'], (string) $validated['price'], 2);
            $item->save();

            $service = app(PurchaseItemService::class);
            $service->recalcOrder((int) $item->order_id);
            $service->recalcPurchase($purchase->id);

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

    /**
     * 切换单品「已对账」标记（入库持久化：未标记→标记，已标记→取消；与采购单状态无关，对账期间可反复勾选）
     */
    #[PutRoute(route: '/{id}/check/{productId}', authorize: 'query', where: ['id' => '[0-9]+', 'productId' => '[0-9]+'])]
    public function toggleItemCheck(int $id, int $productId, Request $request): JsonResponse
    {
        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }
        $hasItem = StoreOrderItemModel::query()
            ->where('purchase_id', $purchase->id)
            ->where('product_id', $productId)
            ->exists();
        if (! $hasItem) {
            throw new RepositoryException('该采购单下无此商品的订货明细');
        }

        $marked = PurchaseItemCheckModel::query()
            ->where('purchase_id', $purchase->id)
            ->where('product_id', $productId)
            ->first();
        if ($marked !== null) {
            $marked->delete();
            return $this->success(['checked' => false], '已取消对账标记');
        }

        PurchaseItemCheckModel::create([
            'purchase_id' => $purchase->id,
            'product_id' => $productId,
            'operator_id' => (int) $request->user()->id,
        ]);
        return $this->success(['checked' => true], '已标记为已对账');
    }

    /**
     * 批量设置单品「已对账」标记（全选用：checked=true 批量标记 / false 批量取消；
     * 仅处理本采购单内有订货明细的商品，重复标记幂等；与采购单状态无关）
     */
    #[PutRoute(route: '/{id}/check', authorize: 'query', where: ['id' => '[0-9]+'])]
    public function batchItemCheck(int $id, Request $request): JsonResponse
    {
        $data = $request->validate([
            'product_ids' => 'required|array|min:1',
            'product_ids.*' => 'integer',
            'checked' => 'required|boolean',
        ], [
            'product_ids.required' => '请选择商品',
            'product_ids.min' => '请选择商品',
        ]);

        $purchase = PurchaseOrderModel::find($id);
        if (empty($purchase)) {
            throw new RepositoryException('采购单不存在');
        }

        // 仅处理本采购单内有订货明细的商品（无效商品静默忽略）
        $productIds = StoreOrderItemModel::query()
            ->where('purchase_id', $purchase->id)
            ->whereIn('product_id', array_map('intval', $data['product_ids']))
            ->distinct()
            ->pluck('product_id')
            ->map(static fn ($v) => (int) $v);

        if (! (bool) $data['checked']) {
            PurchaseItemCheckModel::query()
                ->where('purchase_id', $purchase->id)
                ->whereIn('product_id', $productIds)
                ->delete();
            return $this->success(['count' => $productIds->count()], '已取消对账标记');
        }

        // 批量标记：跳过已标记行，仅补插缺失行（幂等）
        $marked = PurchaseItemCheckModel::query()
            ->where('purchase_id', $purchase->id)
            ->whereIn('product_id', $productIds)
            ->pluck('product_id')
            ->map(static fn ($v) => (int) $v);
        $operatorId = (int) $request->user()->id;
        $now = now();
        $rows = $productIds->diff($marked)
            ->map(static fn (int $productId) => [
                'purchase_id' => $purchase->id,
                'product_id' => $productId,
                'operator_id' => $operatorId,
                'created_at' => $now,
                'updated_at' => $now,
            ])
            ->values()
            ->all();
        if ($rows !== []) {
            PurchaseItemCheckModel::insert($rows);
        }

        return $this->success(['count' => $productIds->count()], '已标记为已对账');
    }

    /**
     * 采购单编辑闸：仅进行中（待采购）允许修改明细
     */
    private function assertPurchaseEditable(PurchaseOrderModel $purchase): void
    {
        if ($purchase->status !== PurchaseOrderModel::STATUS_PENDING) {
            throw new RepositoryException('采购单已完成，不允许修改明细');
        }
    }
}