<?php

namespace App\Service;

use App\Model\Construction;
use App\Model\ConstructionProductInfo;
use App\Model\InvoiceOrder;
use App\Model\InvoiceOrderInfo;
use App\Model\Product;
use App\Model\ProductInventory;
use App\Model\Setting;
use Illuminate\Support\Facades\DB;

class ProductInventoryService extends Service
{
    //获取产品真实库存
    public static function getRealStock($product_id = [],$data=[]){
        if(empty($product_id)) return [];
        $array = ProductInventory::whereIn('product_id',$product_id)
            ->where('number','>',0)
            ->select('id','product_id','number','crt_time','lock_number')
            ->get()->toArray();

        $map = [];
        if(! empty($data['order_number'])){
            if(strpos($data['order_number'],InvoiceOrder::prefix) !== false){
                $id = InvoiceOrder::where('order_number',$data['order_number'])
                    ->where('del_time',0)
                    ->value('id');
                $model = new InvoiceOrderInfo();
            }else{
                foreach (Construction::$prefix as $value){
                    if(strpos($data['order_number'],$value) !== false){
                        $model = new ConstructionProductInfo();
                    }
                }
                $id = Construction::where('order_number',$data['order_number'])
                    ->where('del_time',0)
                    ->value('id');
            }
            if(! empty($model) && ! empty($id)){
                $save = $model->where('del_time',0)
                    ->where('id',$id)
                    ->select('product_id','number')
                    ->get()->toArray();
                foreach ($save as $value){
                    $key = $value['product_id'];
                    if(isset($map[$key])){
                        $map[$key] += $value['number'];
                    }else{
                        $map[$key] = $value['number'];
                    }
                }
            }
        }

        $return = [];
        if(! empty($array)){
            $setting_map = Setting::where('setting_name','lock_number')
                ->pluck('setting_value','setting_name')
                ->toArray();
            foreach ($array as $value){
                if(! empty($setting_map['lock_number'])){//真实库存
                    $tmp = $map[$value['product_id']] ?? 0;//已保存数量
                    $tmp_lock = ($value['lock_number'] > 0 ? $value['lock_number'] : 0) - $tmp;
                    if($value['number'] > $tmp_lock) {
                        $return[] = [
                            'id' => $value['id'],
                            'product_id' => $value['product_id'],
                            'number' => $value['number'] - ($tmp_lock > 0 ? $tmp_lock : 0),
                        ];
                    }
                }else{
                    $return[] = [
                        'id' => $value['id'],
                        'product_id' => $value['product_id'],
                        'number' => $value['number'],
                    ];
                }
            }
        }

        return $return;
    }

    //更新锁定库存
    //第一个数组 (提交的数据)  第二个数组（保存过的数据）
    public static function changeLockNumber($submit_total = [], $save_total = []){
        if(empty($submit_total) && empty($save_total)) return;

        $setting_map = Setting::where('setting_name','lock_number')
            ->pluck('setting_value','setting_name')
            ->toArray();
        if(empty($setting_map['lock_number'])) return; //是否使用锁定库存

        //产品数扣减
        if(! empty($save_total)){
            foreach ($save_total as $key => $value){
                if(! isset($submit_total[$key])){
                    $submit_total[$key] = - $value;
                }else{
                    $submit_total[$key] = $submit_total[$key] - $value;
                }
            }
        }
        //更新锁定库存
        foreach ($submit_total as $key => $value){
            $product_id = $key;

            ProductInventory::where('product_id',$product_id)
                ->update(['lock_number' => DB::raw('lock_number + ('. $value . ')')]);
        }
    }

    //比较库存
    public static function compareStock($product_id = [],$data){
        if(empty($product_id) || empty($data['product'])) return [false,'比较参数不能为空'];

        $pro = Product::whereIn('id',$product_id)
            ->pluck('title','id')
            ->toArray();
        $setting_map = Setting::where('setting_name','lock_number')
            ->pluck('setting_value','setting_name')
            ->toArray();
        $product_map = $data['product'];

        //库存
        $array = ProductInventory::whereIn('product_id',$product_id)
            ->where('number','>',0)
            ->select('id','product_id','number','crt_time','lock_number')
            ->get()->toArray();

        //已保存单据的产品数量
        $map = [];
        if(! empty($setting_map['lock_number']) && ! empty($data['order_number'])){
            if(strpos($data['order_number'],InvoiceOrder::prefix) !== false){
                $id = InvoiceOrder::where('order_number',$data['order_number'])
                    ->where('del_time',0)
                    ->value('id');
                $model = new InvoiceOrderInfo();
            }else{
                foreach (Construction::$prefix as $value){
                    if(strpos($data['order_number'],$value) !== false){
                        $model = new ConstructionProductInfo();
                    }
                }
                $id = Construction::where('order_number',$data['order_number'])
                    ->where('del_time',0)
                    ->value('id');
            }
            if(! empty($model) && ! empty($id)){
                $save = $model->where('del_time',0)
                    ->where('id',$id)
                    ->select('product_id','number')
                    ->get()->toArray();
                foreach ($save as $value){
                    $key = $value['product_id'];
                    if(isset($map[$key])){
                        $map[$key] += $value['number'];
                    }else{
                        $map[$key] = $value['number'];
                    }
                }
            }
        }

        //比较
        if(! empty($array)){
            foreach ($array as $value){
                if(! isset($product_map[$value['product_id']])) return [false,'产品不存在'];

                if(! empty($setting_map['lock_number'])){//真实库存
                    $tmp = $map[$value['product_id']] ?? 0;//已保存数量
                    $tmp_lock = ($value['lock_number'] > 0 ? $value['lock_number'] : 0) - $tmp;
                    $number = $value['number'] - ($tmp_lock > 0 ? $tmp_lock : 0);
                }else{
                    $number = $value['number'];
                }
                if($product_map[$value['product_id']] > $number) return [false,$pro[$value['product_id']] . '数量不足,当前数量:'. $number];
            }
        }

        return [true,''];
    }
}