<?php

namespace App\Services\GoodSku;

use App\Events\BatchStockUpdateEvent;
use App\Models\BusinessOrderItem;
use App\Models\CombinationGood;
use App\Models\DailyStockRecord;
use App\Models\GoodsSku;
use App\Utils\DateTimeUtils;
use Carbon\Carbon;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

class GoodSkuService
{
    /**
     * $skusWithCombinationGoods 除了携带组合商品的字段 还拼接了盘点的具体库存值inventory
     * @param array $skusWithCombinationGoods
     * @return void
     */
    public function inventory(array $skusWithCombinationGoods)
    {
        $skusWithCombinationGoods = $this->handleSkusWithCombinationGoods($skusWithCombinationGoods);
        //传进来的sku可能包含组合商品 所以这里需要事先计算好数据
        $inventoryKeyBySkuIdMap = collect($skusWithCombinationGoods)->where('is_combination', "=", 0)
            ->pluck("inventory", "id")->toArray();
        //计算组合商品
        foreach ($skusWithCombinationGoods as $sku) {
            if (!empty($sku['is_combination'])) {
                foreach ($sku['combination_goods'] as $combinationGoods) {
                    if (empty($inventoryKeyBySkuIdMap[$combinationGoods["item_id"]])) {
                        //没有盘点到的sku需要在原先的sku库存
                        $inventoryKeyBySkuIdMap[$combinationGoods["item_id"]] = GoodsSku::query()
                            ->where('id', $combinationGoods["item_id"])->pluck('stock')->first() ?? 0;
                    }

                    $inventoryKeyBySkuIdMap[$combinationGoods["item_id"]] += $combinationGoods['item_num'] * $sku['inventory'];
                }
            }
        }

        $today = DateTimeUtils::getToday();
        $dateTime = date('Y-m-d H:i:s');
        $updateIds = [];
        Log::info("库存盘点前完整信息", $skusWithCombinationGoods);
        Log::info("需要操作的库存数据", $inventoryKeyBySkuIdMap);
        foreach ($inventoryKeyBySkuIdMap as $skuId => $totalInventory) {
            // 更新
            $record = DailyStockRecord::query()->firstOrCreate([
                'sku_id' => $skuId,
                'day' => $today,
            ]);
            $record->inventory = $totalInventory;
            $record->inventory_time = $dateTime;
            $record->save();

            //库存修改 盘点是直接覆盖
            GoodsSku::query()->where('id', $skuId)->update([
                'stock' => $totalInventory
            ]);
            $updateIds[] = $skuId;
        }
        // 批量更新
        event(new BatchStockUpdateEvent($updateIds));
    }

    /**
     * 库存盘点 需要扣减未发货未取消的订单数据
     * 目前只查询了7日内的数据
     * @param array $skusWithCombinationGoods
     * @return \Illuminate\Support\Collection
     */
    public function handleSkusWithCombinationGoods(array $skusWithCombinationGoods){
        //查询sku当前未发货的数量 需要扣减
        $externalSkuIds = collect($skusWithCombinationGoods)->pluck("external_sku_id")->toArray();
        //默认只查15天内未发货的数据
        $startTime = Carbon::now()->subDays(15)->startOfDay()->toDateTimeString();
        $unshippedDataCollect = BusinessOrderItem::query()
            ->leftJoin("business_orders as b", "business_order_id", "=", "b.id")
            ->select("external_sku_id", DB::raw("sum(goods_number) as goods_total"), DB::raw("sum(already_cancel_number) as cancel_total"))
            ->whereIn("external_sku_id", $externalSkuIds)->where("b.shipping_status", "=", 0)
            ->where("business_order_items.created_at", ">=", $startTime)->where("business_order_items.cancel_status", "=", 0)
            ->groupBy('external_sku_id')->get()->toArray();
        $unshippedData = collect($unshippedDataCollect)->pluck(null,"external_sku_id")->toArray();
        Log::info("7日内未发货数据", $unshippedData);
        return collect($skusWithCombinationGoods)->map(function ($v) use ($unshippedData) {
            if (!empty($unshippedData[$v['external_sku_id']])) {
                $v['inventory'] = $v['inventory'] - $unshippedData[$v['external_sku_id']]['goods_total']
                    + $unshippedData[$v['external_sku_id']]['cancel_total'];
            }
            return $v;
        })->toArray();
    }


    public static function computeSkuStock(array $goodsSkuItem, array $v)
    {
        $updateIds = [];
        Log::info("库存更新前完整商品信息", $goodsSkuItem);
        Log::info("库存更新前完整请求信息", $v);
        $updateParams = [];
        if (empty($goodsSkuItem['is_combination'])) {
            $updateParam = [
                'stock' => $goodsSkuItem['stock'] + $v['num'],
                'sale_stock' => $goodsSkuItem['sale_stock'] + $v['num'],
                'cost' => number_format(($goodsSkuItem['stock'] * $goodsSkuItem['cost'] + $v['cost'] * $v['num'])
                    / ($goodsSkuItem['stock'] + $v['num']), 2),
            ];
            GoodsSku::query()->where('external_sku_id',"=", $goodsSkuItem['external_sku_id'])
                ->update($updateParam);
            $updateIds[] = $goodsSkuItem['id'];
            $updateParams[] = $updateParam;
        } else {
            //组合商品 这里需要重新获取 减少更新丢失概率
            $combinationGood = CombinationGood::query()->with('goodsSkuItem:id,stock,sale_stock')
                ->where('goods_sku_id', $goodsSkuItem['id'])->get();
            foreach ($combinationGood as $item) {
                $updateParam = [
                    'stock' => $item['goodsSkuItem']['stock'] + $v['num'] * $item['item_num'],
                    'sale_stock' => $item['goodsSkuItem']['sale_stock'] + $v['num'] * $item['item_num'],
                ];
                GoodsSku::query()->where('id', $item['goodsSkuItem']['id'])->update($updateParam);
                $updateIds[] = $item['goodsSkuItem']['id'];
                $updateParams[] = $updateParam;
            }
        }
        Log::info("本次请求更新参数", $updateParams);
        return $updateIds;
    }

}