<?php

namespace App\Http\Controllers\Order;

use App\Exceptions\RepositoryException;
use App\Models\NoticeModel;
use App\Models\ProductModel;
use App\Models\ProductPriceModel;
use App\Models\StoreOrderItemModel;
use App\Models\StoreOrderModel;
use App\Models\UserModel;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Modules\AnnoRoute\Attribute\DeleteRoute;
use Modules\AnnoRoute\Attribute\GetRoute;
use Modules\AnnoRoute\Attribute\PutRoute;
use Modules\AnnoRoute\Attribute\RequestAttribute;
use Modules\Common\Http\Controllers\BaseController;
use Modules\SystemTool\Models\SysFileModel;

/**
 * 门店订单管理（订单只读 + 状态管理 + 明细修改/同步；创建/取消在小程序端）
 */
#[RequestAttribute('/order/store', 'order.store')]
class StoreOrderController extends BaseController
{
    /** 状态中文名（通知文案用） */
    private const array STATUS_NAMES = [
        StoreOrderModel::STATUS_PENDING => '待接单',
        StoreOrderModel::STATUS_SUMMARIZED => '已接单',
        StoreOrderModel::STATUS_DELIVERING => '采购中',
        StoreOrderModel::STATUS_DISTRIBUTION => '配送中',
        StoreOrderModel::STATUS_COMPLETED => '已完成',
        StoreOrderModel::STATUS_CANCELLED => '已取消',
    ];

    /** 明细可编辑状态：待接单、已接单、采购中、配送中（已完成/已取消锁定） */
    private const array ITEM_EDITABLE_STATUS = [
        StoreOrderModel::STATUS_PENDING,
        StoreOrderModel::STATUS_SUMMARIZED,
        StoreOrderModel::STATUS_DELIVERING,
        StoreOrderModel::STATUS_DISTRIBUTION,
    ];

    protected array $searchField = [
        'store_id' => '=',
        'status' => '=',
        'order_no' => 'like',
        'order_date' => 'betweenDate',
    ];

    /** 订单列表（支持按包含的商品名称搜索 ?product_name=） */
    #[GetRoute(authorize: 'query')]
    public function query(Request $request): JsonResponse
    {
        $params = $request->all();
        $pageSize = $params['pageSize'] ?? 10;
        $query = StoreOrderModel::query()->with([
            'store:id,name,address,contact,phone',
            'items:id,order_id,product_id,product_name,product_spec,unit,price,quantity,amount,image_ids',
        ]);

        // 按包含的商品名称搜索：任一明细品名包含关键字即命中
        $productName = trim((string) ($params['product_name'] ?? ''));
        if ($productName !== '') {
            $keyword = '%' . str_replace('%', '\%', $productName) . '%';
            $query->whereHas('items', static function ($itemQuery) use ($keyword) {
                $itemQuery->where('product_name', 'like', $keyword);
            });
        }

        $data = $this->buildSearch($params, $query)
            ->orderBy('order_date', 'desc')
            ->orderBy('id', 'desc')
            ->paginate($pageSize)
            ->toArray();

        // Paginator::toArray() 的 data 仍为模型，先显式转数组（明细/关系一并转换）
        $data['data'] = array_map(
            static fn ($order) => is_object($order) ? $order->toArray() : $order,
            $data['data']
        );

        // 明细封面图：从快照 image_ids 批量解析（不再关联商品档案表）
        foreach ($data['data'] as &$order) {
            $this->resolveItemImages($order['items']);
        }
        unset($order);

        $box_amount = site_config('services.box_amount');
        $tray_amount = site_config('services.tray_amount');
        foreach ($data['data'] as &$item) {
            $item['box_price'] = number_format($box_amount, 2);
            $item['tray_price'] = number_format($tray_amount, 2);
            $item['box_amount'] = number_format($box_amount * $item['box_num'], 2);
            $item['tray_amount'] = number_format($tray_amount * $item['tray_num'], 2);
        }
        return $this->success($data);
    }

    /**
     * 已接单预览：聚合所有已接单订单明细（按商品分组），
     * 供生成采购单前确认（C1 前置）；单位取明细快照
     */
    #[GetRoute('/summary', 'query')]
    public function summary(): JsonResponse
    {
        $rows = StoreOrderItemModel::query()
            ->select('product_id')
            ->selectRaw('MAX(product_name) as product_name')
            ->selectRaw('MAX(product_spec) as product_spec')
            ->selectRaw('MAX(unit) as unit')
            ->selectRaw('SUM(quantity) as total_quantity')
            ->selectRaw('COUNT(DISTINCT store_id) as store_count')
            ->whereHas('order', function ($query) {
                $query->where('status', StoreOrderModel::STATUS_SUMMARIZED);
            })
            ->groupBy('product_id')
            ->orderBy('product_id')
            ->get()
            ->toArray();

        // 快照无单位的历史明细兜底：从商品档案（含已下架/软删除）补齐
        $emptyUnitProductIds = array_column(array_filter(
            $rows,
            static fn (array $row) => ($row['unit'] ?? '') === ''
        ), 'product_id');
        if ($emptyUnitProductIds !== []) {
            $units = ProductModel::withTrashed()
                ->whereIn('id', $emptyUnitProductIds)
                ->pluck('unit', 'id');
            foreach ($rows as &$row) {
                if (($row['unit'] ?? '') === '') {
                    $row['unit'] = $units[$row['product_id']] ?? '';
                }
            }
        }

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

    /** 订单详情：订单头 + 明细（含商品快照、首图；后台侧成本价可见、附供应商名） */
    #[GetRoute(route: '/{id}', authorize: 'query', where: ['id' => '[0-9]+'])]
    public function detail(int $id): JsonResponse
    {
        $order = StoreOrderModel::with([
            'store:id,name,address,contact,phone',
            'items' => static fn ($query) => $query->with('supplier:id,name'),
        ])->find($id);
        if (empty($order)) {
            throw new RepositoryException('订单不存在');
        }

        // 成本价默认对序列化隐藏（防泄漏到小程序端），后台恢复可见
        $order->items->each->makeVisible('cost_price');

        $data = $order->toArray();

        // 明细首图 + 附加金额（与列表接口一致）
        $this->resolveItemImages($data['items']);
        $boxAmount = site_config('services.box_amount');
        $trayAmount = site_config('services.tray_amount');
        $data['box_price'] = number_format($boxAmount, 2);
        $data['tray_price'] = number_format($trayAmount, 2);
        $data['box_amount'] = number_format($boxAmount * $data['box_num'], 2);
        $data['tray_amount'] = number_format($trayAmount * $data['tray_num'], 2);

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

    /**
     * 明细首图解析：从快照 image_ids 批量解析文件 URL，未找到时置空字符串（列表/详情共用）
     *
     * @param array<int, array<string, mixed>> $items 订单明细数组（引用修改）
     */
    private function resolveItemImages(array &$items): void
    {
        $fileIds = [];
        foreach ($items as $line) {
            foreach ((array) ($line['image_ids'] ?? []) as $fileId) {
                if ($fileId !== '' && $fileId !== null) {
                    $fileIds[] = (int) $fileId;
                }
            }
        }
        $fileUrls = [];
        if ($fileIds !== []) {
            foreach (SysFileModel::query()->whereIn('id', array_unique($fileIds))->get() as $file) {
                $fileUrls[$file->id] = $file->preview_url;
            }
        }
        foreach ($items as &$product) {
            $product['image'] = '';
            foreach ((array) ($product['image_ids'] ?? []) as $fileId) {
                if ($fileId !== '' && $fileId !== null && isset($fileUrls[(int) $fileId])) {
                    $product['image'] = $fileUrls[(int) $fileId];
                    break;
                }
            }
            unset($product['image_ids']);
        }
    }

    /**
     * 修改订单明细（商品快照 + 订货量/重量），事务内重算单品金额与订单总价。
     * 可改字段：供应商、品名、规格、单位、单价、成本价、订货量、重量
     */
    #[PutRoute(route: '/item/{id}', authorize: 'update', where: ['id' => '[0-9]+'])]
    public function updateItem(int $id, Request $request): JsonResponse
    {
        $data = $request->validate([
            'supplier_id' => 'required|integer|min:0',
            'product_name' => 'required|string|max:100',
            'product_spec' => 'nullable|string|max:100',
            'unit' => 'required|string|max:20',
            'price' => 'required|numeric|min:0',
            'cost_price' => 'required|numeric|min:0',
            'quantity' => 'required|integer|min:1',
            'weight' => 'required|numeric|min:0',
            'remark' => 'nullable|string'
        ], [
            'supplier_id.required' => '供应商不能为空',
            'supplier_id.integer' => '供应商ID必须为整数',
            'supplier_id.min' => '供应商ID不正确',
            'product_name.required' => '品名不能为空',
            'product_name.max' => '品名最长 100 个字符',
            'product_spec.max' => '规格最长 100 个字符',
            'unit.required' => '计价单位不能为空',
            'unit.max' => '计价单位最长 20 个字符',
            'price.required' => '单价不能为空',
            'price.numeric' => '单价必须为数字',
            'price.min' => '单价不能小于 0',
            'cost_price.required' => '成本价不能为空',
            'cost_price.numeric' => '成本价必须为数字',
            'cost_price.min' => '成本价不能小于 0',
            'quantity.required' => '订货量不能为空',
            'quantity.integer' => '订货量必须为整数',
            'quantity.min' => '订货量必须大于 0',
            'weight.required' => '重量不能为空',
            'weight.numeric' => '重量必须为数字',
            'weight.min' => '重量不能小于 0',
        ]);

        return DB::transaction(function () use ($id, $data) {
            $item = StoreOrderItemModel::query()->lockForUpdate()->find($id);
            if (empty($item)) {
                throw new RepositoryException('订单明细不存在');
            }
            $order = StoreOrderModel::query()->lockForUpdate()->find($item->order_id);
            if (empty($order)) {
                throw new RepositoryException('订单不存在');
            }
            $this->assertItemEditable($order);

            $item->fill($data);
            $item->product_spec = (string) ($data['product_spec'] ?? '');
            $item->amount = bcmul(
                bcadd((string) $data['price'], '0', 2),
                (string) $data['quantity'],
                2
            );
            $item->save();

            $this->recalculateOrderTotals($order);

            return $this->success($item->load('supplier:id,name')->makeVisible('cost_price')->toArray());
        });
    }

    /**
     * 一键同步明细商品快照：按商品ID同步最新商品档案的
     * 供应商、品名、规格、单位、成本价；单价按门店当前等级价重算
     * （未设置等级价时保留原单价），并重算订单总价
     */
    #[PutRoute(route: '/item/{id}/sync', authorize: 'update', where: ['id' => '[0-9]+'])]
    public function syncItem(int $id): JsonResponse
    {
        return DB::transaction(function () use ($id) {
            $item = StoreOrderItemModel::query()->lockForUpdate()->find($id);
            if (empty($item)) {
                throw new RepositoryException('订单明细不存在');
            }
            $order = StoreOrderModel::query()->lockForUpdate()->find($item->order_id);
            if (empty($order)) {
                throw new RepositoryException('订单不存在');
            }
            $this->assertItemEditable($order);

            // 软删除商品无法同步（下架商品仍可同步最新档案）
            $product = ProductModel::find($item->product_id);
            if (empty($product)) {
                throw new RepositoryException('商品不存在或已被删除，无法同步');
            }

            $item->supplier_id = (int) $product->supplier_id;
            $item->product_name = $product->name;
            $item->product_spec = (string) $product->spec;
            $item->unit = (string) $product->unit;
            $item->cost_price = $product->cost_price;

            // 单价：按订货门店当前客户等级价重算（百分比计价按最新成本价换算）
            $levelId = (int) ($order->store->level_id ?? 0);
            $priceRow = ProductPriceModel::query()
                ->forProductLevel((int) $item->product_id, $levelId)
                ->first(['price', 'price_type', 'percent']);
            if ($priceRow !== null) {
                $item->price = ProductPriceModel::calcActualPrice(
                    (int) $priceRow->price_type,
                    $priceRow->price,
                    $priceRow->percent,
                    $product->cost_price,
                );
            }

            $item->amount = bcmul((string) $item->price, (string) $item->quantity, 2);
            $item->save();

            $this->recalculateOrderTotals($order);

            return $this->success($item->load('supplier:id,name')->makeVisible('cost_price')->toArray());
        });
    }

    /**
     * 状态流转：待接单→已接单/已取消；采购中→配送中/已完成；配送中→已完成
     */
    #[PutRoute(route: '/{id}/status', authorize: 'update', where: ['id' => '[0-9]+'])]
    public function status(int $id, Request $request): JsonResponse
    {
        $data = $request->validate([
            'status' => 'required|integer|in:1,3,4,9',
        ], [
            'status.required' => '目标状态不能为空',
            'status.in' => '目标状态值不正确',
        ]);

        $order = StoreOrderModel::find($id);
        if (empty($order)) {
            throw new RepositoryException('订单不存在');
        }

        $target = (int) $data['status'];
        if (! in_array($target, $this->allowedTransitions($order->status), true)) {
            throw new RepositoryException(
                '订单当前状态为「' . (self::STATUS_NAMES[$order->status] ?? $order->status) . '」，不允许该操作'
            );
        }

        $order->status = $target;
        $order->save();

        $this->notifyStore($order);

        return $this->success();
    }

    /**
     * 批量状态流转：先全量校验流转路径，任一订单不允许则整批中止；
     * 全部合法时在事务内流转并逐单通知门店
     */
    #[PutRoute(route: '/batchStatus', authorize: 'update')]
    public function batchStatus(Request $request): JsonResponse
    {
        $data = $request->validate([
            'ids' => 'required|array|min:1',
            'ids.*' => 'integer|exists:store_order,id',
            'status' => 'required|integer|in:1,3,4,9',
        ], [
            'ids.required' => '请选择要流转的订单',
            'ids.min' => '请选择要流转的订单',
            'ids.*.exists' => '订单不存在',
            'status.required' => '目标状态不能为空',
            'status.in' => '目标状态值不正确',
        ]);

        $target = (int) $data['status'];
        $orders = StoreOrderModel::query()->whereIn('id', $data['ids'])->get();

        // 全量预校验：任一订单不满足流转条件，整批中止，不做任何修改
        $blocked = [];
        foreach ($orders as $order) {
            if (! in_array($target, $this->allowedTransitions($order->status), true)) {
                $blocked[] = $order->order_no . '（' . (self::STATUS_NAMES[$order->status] ?? $order->status) . '）';
            }
        }
        if (! empty($blocked)) {
            throw new RepositoryException(
                '以下订单不允许流转为「' . (self::STATUS_NAMES[$target] ?? $target) . '」，批量操作已中止：' . implode('、', $blocked)
            );
        }

        DB::transaction(function () use ($orders, $target) {
            foreach ($orders as $order) {
                $order->status = $target;
                $order->save();
                $this->notifyStore($order);
            }
        });

        return $this->success(['success' => $orders->count()]);
    }

    /**
     * 删除订单（软删除）：仅已取消订单允许删除；删除后后台列表/详情、小程序端均不可见
     */
    #[DeleteRoute(route: '/{id}', authorize: 'delete', where: ['id' => '[0-9]+'])]
    public function delete(int $id): JsonResponse
    {
        $order = StoreOrderModel::find($id);
        if (empty($order)) {
            throw new RepositoryException('订单不存在');
        }
        if ($order->status !== StoreOrderModel::STATUS_CANCELLED) {
            throw new RepositoryException(
                '订单当前状态为「' . (self::STATUS_NAMES[$order->status] ?? $order->status) . '」，仅已取消订单可删除'
            );
        }

        $order->delete();

        return $this->success();
    }

    /**
     * 状态流转合法路径（与迁移状态定义一致）：
     * 待接单→已接单/已取消；采购中→配送中/已完成；配送中→已完成
     * （已接单→采购中 只能经「生成采购单」完成，不在本流转内）
     *
     * @return int[]
     */
    private function allowedTransitions(int $status): array
    {
        return match ($status) {
            StoreOrderModel::STATUS_PENDING => [
                StoreOrderModel::STATUS_SUMMARIZED,
                StoreOrderModel::STATUS_CANCELLED,
            ],
            StoreOrderModel::STATUS_DELIVERING => [
                StoreOrderModel::STATUS_DISTRIBUTION,
                StoreOrderModel::STATUS_COMPLETED,
            ],
            StoreOrderModel::STATUS_DISTRIBUTION => [StoreOrderModel::STATUS_COMPLETED],
            default => [],
        };
    }

    /**
     * 修改周转框/周转托盘数量（仅已接单、采购中、配送中可改），
     * 自动重算附加金额与订单总金额
     */
    #[PutRoute(route: '/{id}/container', authorize: 'update', where: ['id' => '[0-9]+'])]
    public function container(int $id, Request $request): JsonResponse
    {
        $data = $request->validate([
            'box_num' => 'required|integer|min:0',
            'tray_num' => 'required|integer|min:0',
        ], [
            'box_num.required' => '周转框数量不能为空',
            'box_num.integer' => '周转框数量必须为整数',
            'box_num.min' => '周转框数量不能小于 0',
            'tray_num.required' => '周转托盘数量不能为空',
            'tray_num.integer' => '周转托盘数量必须为整数',
            'tray_num.min' => '周转托盘数量不能小于 0',
        ]);

        $order = StoreOrderModel::find($id);
        if (empty($order)) {
            throw new RepositoryException('订单不存在');
        }

        $editable = [
            StoreOrderModel::STATUS_SUMMARIZED,
            StoreOrderModel::STATUS_DELIVERING,
            StoreOrderModel::STATUS_DISTRIBUTION,
        ];
        if (! in_array($order->status, $editable, true)) {
            throw new RepositoryException(
                '订单当前状态为「' . (self::STATUS_NAMES[$order->status] ?? $order->status) . '」，不允许修改周转框/托盘数量'
            );
        }

        $boxPrice = (float) site_config('services.box_amount', 0);
        $trayPrice = (float) site_config('services.tray_amount', 0);
        $addedAmount = round($data['box_num'] * $boxPrice + $data['tray_num'] * $trayPrice, 2);

        // 历史订单未写商品金额：按「总额 - 附加」反推并回写，保证 总额 = 商品 + 附加 恒成立
        $productAmount = (float) $order->product_amount;
        if ($productAmount <= 0 && (float) $order->total_amount > 0) {
            $productAmount = round((float) $order->total_amount - (float) $order->added_amount, 2);
        }

        $order->box_num = (int) $data['box_num'];
        $order->tray_num = (int) $data['tray_num'];
        $order->product_amount = $productAmount;
        $order->added_amount = $addedAmount;
        $order->total_amount = round($productAmount + $addedAmount, 2);
        $order->save();

        return $this->success();
    }

    /**
     * 明细编辑状态校验：已完成/已取消订单锁定
     */
    private function assertItemEditable(StoreOrderModel $order): void
    {
        if (! in_array($order->status, self::ITEM_EDITABLE_STATUS, true)) {
            throw new RepositoryException(
                '订单当前状态为「' . (self::STATUS_NAMES[$order->status] ?? $order->status) . '」，不允许修改商品明细'
            );
        }
    }

    /**
     * 重算订单汇总：明细金额合计 → 商品总金额；订货量/重量合计 → 订货总量/总重量；
     * 订单总金额 = 商品总金额 + 附加金额（恒成立）
     */
    private function recalculateOrderTotals(StoreOrderModel $order): void
    {
        $totals = StoreOrderItemModel::query()
            ->where('order_id', $order->id)
            ->selectRaw('COALESCE(SUM(quantity), 0) as total_quantity')
            ->selectRaw('COALESCE(SUM(weight), 0) as total_weight')
            ->selectRaw('COALESCE(SUM(amount), 0) as product_amount')
            ->first();

        $productAmount = bcadd((string) $totals->product_amount, '0', 2);
        $order->total_quantity = (int) $totals->total_quantity;
        $order->total_weight = bcadd((string) $totals->total_weight, '0', 3);
        $order->product_amount = $productAmount;
        $order->total_amount = bcadd($productAmount, (string) $order->added_amount, 2);
        $order->save();
    }

    /**
     * 状态流转后通知门店用户
     */
    private function notifyStore(StoreOrderModel $order): void
    {
        $userIds = UserModel::query()
            ->where('store_id', $order->store_id)
            ->where('status', UserModel::STATUS_NORMAL)
            ->pluck('id');

        $statusName = self::STATUS_NAMES[$order->status] ?? (string) $order->status;
        foreach ($userIds as $userId) {
            NoticeModel::create([
                'user_id' => $userId,
                'type' => NoticeModel::TYPE_ORDER,
                'title' => '订单状态更新',
                'content' => mb_substr("您的订单 {$order->order_no} 状态已更新为「{$statusName}」", 0, 500),
                'data' => ['order_id' => $order->id],
                'is_read' => NoticeModel::UNREAD,
            ]);
        }
    }
}