/**
     * Bid an existing Products model.
     * If bid is successful, the browser will be redirected to the 'viewBid' page.
     * @param string $memberId
     * @param string $productId
     * @return mixed
     */
    public function actionBidProduct($memberId, $productId)
    {
        $memberId = Yii::$app->user->identity->username;
        $products = Products::findOne($productId);
        $productsPicture = Productspicture::find()->where(['Products_id' => $productId])->all();
        $bidding = Bidding::findOne($productId);
        $shippingIds = $products->getProductsHasShipping()->all();
        $shippings = [];
        foreach($shippingIds as $shippingId){
            array_push($shippings, Shipping::findOne($shippingId->Shipping_id));
        }
        $newBid = new Bid(['scenario' => 'bid']);
        if($newBid->load(Yii::$app->request->post()))
        {
            $newBid->Member_username = $memberId;
            $newBid->Products_id = $productId;
            if($newBid->maxPrice > $bidding->minValue){             //Check new bid higher than old value
                if($newBid->validate()){
                    $oldBid = Bid::find()->where(['Products_id' => $productId])->orderBy(['maxPrice' => SORT_DESC])->one();
                    if($oldBid == null){                            //First time bid
                        $newBid->isWinner = true;
                        if($newBid->spread < $bidding->minSpread){
                            $newBid->spread = $bidding->minSpread;
                        }
                        while($newBid->price - $bidding->minValue < 0.01 || $newBid->price < $bidding->minValue){
                            $newBid->price = $newBid->price + $newBid->spread;
                        }
                        if($newBid->price > $newBid->maxPrice){
                            $newBid->price = $newBid->maxPrice;
                        }
                        $bidding->minValue = $newBid->price;
                        $newBid->save();
                        $bidding->update();
                        return $this->render('viewBid', array(
                            'newBid' => $newBid,
                        ));
                    }else{
                        if($newBid->maxPrice > $oldBid->maxPrice){  //New bid won
                            $newBid->isWinner = true;
                            $oldBid->price = $oldBid->maxPrice;
                            $oldBid->isWinner = false;
                            if($newBid->spread < $bidding->minSpread){
                                $newBid->spread = $bidding->minSpread;
                            }
                            while($newBid->price - $oldBid->maxPrice < 0.001 || $newBid->price < $oldBid->maxPrice){
                                $newBid->price = $newBid->price + $newBid->spread;
                            }
                            if($newBid->price > $newBid->maxPrice){
                                $newBid->price = $newBid->maxPrice;
                            }
                            $bidding->minValue = $newBid->price;
                            $newBid->save();
                            $oldBid->update();
                            $bidding->update();
                            return $this->render('viewBid', array(
                                'newBid' => $newBid,
                            ));
                        }else{                                  //Old bid won
                            $newBid->isWinner = false;
                            $newBid->price = $newBid->maxPrice;
                            if($oldBid->spread < $bidding->minSpread){
                                $oldBid->spread = $bidding->minSpread;
                            }
                            while($oldBid->price - $newBid->maxPrice < 0.01 || $oldBid->price < $newBid->maxPrice){
                                $oldBid->price = $oldBid->price + $oldBid->spread;
                            }
                            if($oldBid->price > $oldBid->maxPrice){
                                $oldBid->price = $oldBid->maxPrice;
                            }
                            $bidding->minValue = $oldBid->price;
                            $newBid->save();
                            $oldBid->update();
                            $bidding->update();
                            return $this->render('viewBid', array(
                                'newBid' => $newBid,
                            ));
                        }
                    }
                }
            }
        }
        return $this->render('bid', array(
            'newBid' => $newBid,
        ));
    }