<?php

namespace api\logic;

use backend\modules\goods\models\ars\Goods;
use backend\modules\goods\models\ars\GoodsSku;
use backend\modules\shop\models\ars\Address;
use backend\modules\shop\models\ars\Cart;
use backend\modules\shop\models\ars\Order;
use backend\modules\shop\models\ars\OrderGoods;
use backend\modules\shop\models\ars\TakingSite;
use yii\base\Component;
use Throwable;
use Yii;
use yii\db\ActiveRecord;
use yii\base\Exception;
use yii\web\BadRequestHttpException;
use yii\web\NotFoundHttpException;
use yii\web\ServerErrorHttpException;

/**
 * @author iron
 * @email weiriron@gmail.com
 * @package api\logic
 */
class OrderLogic extends Component
{
    public $viewAction = 'view';
    /*订单操作类型*/
    const TYPE_CONFIRM = 1;
    const TYPE_CANCEL = 2;
    const TYPE_TAKE = 3;
    const TYPE_CHANGE_SHIPPING_TYPE = 4;
    const TYPE_CHANGE_ADDRESS = 5;
    const TYPE_CHANGE_TAKING_SITE = 6;
    /*仓库类型*/
    const TYPE_ADD_STOCK = 1;
    const TYPE_SUB_STOCK = -1;


    /**
     * @return Order
     * @throws BadRequestHttpException
     * @throws Exception
     * 创建订单
     */
    public function create()
    {
        //立即购物需传参数
        $goodsId = Yii::$app->request->getBodyParam('goodsId');/*int 商品id*/
        $count = Yii::$app->request->getBodyParam('count');/*int 数量*/
        $skuId = Yii::$app->request->getBodyParam('skuId');/*int 商品sku id*/
        //购物车提交订单需传参数
        $cartIds = Yii::$app->request->getBodyParam('cartIds');/*array 购物车商品id*/

        if ((empty($cartIds) && empty($goodsId)) || ($goodsId && empty($count))) {
            throw new BadRequestHttpException(Helper::REQUEST_BAD_PARAMS);
        }
        $tra = Yii::$app->db->beginTransaction();
        try {
            $order = new Order();
            if (!$order->save()) {
                throw new ServerErrorHttpException('服务器创建订单失败');
            }
            if ($goodsId && $count) {
                $this->addGoods($order->id, $goodsId, $skuId, $count);/*添加订单商品*/
            } else {
                $this->addGoodsByCart($cartIds, $order->id);/*通过购物车添加订单商品*/
            }
            $this->saveGoodsInfo($order);/*保存订单商品信息*/
            $tra->commit();
            Helper::createdResponse($order, $this->viewAction);
            return $order;
        } catch (Exception $e) {
            $tra->rollBack();
            throw $e;
        }
    }

    /**
     * @return bool
     * @throws Exception
     * @throws Throwable
     * @throws yii\base\InvalidConfigException
     * 根据操作类型更新订单
     */
    public function update()
    {
        $data = Yii::$app->request->getBodyParams();
        $type = Yii::$app->request->getBodyParam('type');
        $order = $this->findOrder();
        $tra = Yii::$app->db->beginTransaction();
        try {
            switch ($type) {
                case self::TYPE_CONFIRM :
                    $this->confirm($order, $data);
                    break;
                case self::TYPE_CANCEL:
                    $this->cancel($order);
                    break;
                case self::TYPE_TAKE:
                    $this->take($order);
                    break;
                case self::TYPE_CHANGE_SHIPPING_TYPE:
                    $this->switchShippingType($order, $data);
                    break;
                case self::TYPE_CHANGE_ADDRESS:
                    $this->changeAddress($order, $data);
                    break;
                case self::TYPE_CHANGE_TAKING_SITE:
                    $this->changeTakingSite($order, $data);
                    break;
            }
            if (!$order->save()) {
                throw new ServerErrorHttpException('服务器更新订单失败');
            }
            $tra->commit();
            return true;
        } catch (Exception $e) {
            $tra->rollBack();
            throw $e;
        }
    }

    /*----------------------------------------- 华丽的分割线 -----------------------------------------*/
    /**
     * @param Order $order
     * @param array $data
     * @throws BadRequestHttpException
     * @throws NotFoundHttpException
     * 添加地址到订单
     */
    private function changeAddress($order, $data)
    {
        if (!isset($data['address_id'])) {
            throw new BadRequestHttpException(Helper::REQUEST_BAD_PARAMS);
        }
        if ($order->shipping_type !== Order::SHIPPING_TYPE_EXPRESS) {
            throw new BadRequestHttpException('配送方式异常');
        }
        $address = Address::findOne(['id' => $data['address_id'], 'user_id' => Yii::$app->user->getId()]);
        if (!$address) {
            throw new NotFoundHttpException('收货地址未找到');
        }
        $order->consignee = $address->consignee;
        $order->phone = $address->phone;
        $order->city = $address->city;
        $order->area = $address->area;
        $order->province = $address->province;
        $order->address = $address->address;
    }

    /**
     * @param Order $order
     * @param array $data
     * @throws BadRequestHttpException
     * @throws NotFoundHttpException
     * 修改自提点
     */
    private function changeTakingSite($order, $data)
    {
        if (!isset($data['taking_site_id']) || empty($data['taking_site_id'])) {
            throw new BadRequestHttpException(Helper::REQUEST_BAD_PARAMS);
        }
        if ($order->shipping_type !== Order::SHIPPING_TYPE_PICKED_UP) {
            throw new BadRequestHttpException('配送方式异常');
        }
        $site = TakingSite::findOne($data['taking_site_id']);
        if (!$site) {
            throw new NotFoundHttpException('自提点未找到');
        }
        $order->taking_site = $data['taking_site_id'];
    }


    /**
     * @param Order $order
     * @param array $data
     * @throws BadRequestHttpException
     * 切换配送方式
     */
    private function switchShippingType($order, $data)
    {
        if (!isset($data['shipping_type'])) {
            throw new BadRequestHttpException(Helper::REQUEST_BAD_PARAMS);
        }
        if ($order->status !== Order::STATUS_UNCONFIRMED) {
            throw new BadRequestHttpException('订单状态异常');
        }
        $order->shipping_type = $data['shipping_type'];
    }

    /**
     * @param Order $order
     * @param array $data
     * @throws BadRequestHttpException
     * @throws NotFoundHttpException
     * @throws ServerErrorHttpException
     * @throws Throwable
     * @throws yii\db\StaleObjectException
     * 确定订单
     */
    private function confirm($order, $data)
    {
        if ($order->status !== Order::STATUS_UNCONFIRMED) {
            throw new BadRequestHttpException('订单状态异常');
        }
        if ($order->shipping_type === Order::SHIPPING_TYPE_PICKED_UP) {
            if ($data['consignee'] ?? false || $data['phone'] ?? false) {
                throw new BadRequestHttpException(Helper::REQUEST_BAD_PARAMS);
            }
            $order->consignee = $data['consignee'];
            $order->phone = $data['phone'];
        }
        if (empty($order->consignee)) {
            throw new BadRequestHttpException('需先填写收件人信息');
        }
        if (isset($data['remarks'])) {
            $order->remarks = $data['remarks'];
        }
        Helper::delCarts($this->getCartsIds($order)); //删除购物车对应商品
        $order->status = Order::STATUS_NONPAYMENT;
        $this->updateStock($order, self::TYPE_SUB_STOCK);
    }

    /**
     * @param $order
     * @return array
     * 获取订单商品对应购物车商品id
     */
    private function getCartsIds($order)
    {
        $allGoods = $this->findOrderGoods($order->id);
        $ids = [];
        foreach ($allGoods as $goods) {
            $cart = Cart::findOne(['goods_id' => $goods->goods_id, 'user_id' => Yii::$app->user->getId()]);
            if ($cart) {
                $ids[] = $cart->id;
            }
        }
        return $ids;
    }

    /**
     * @param Order $order
     * @throws BadRequestHttpException
     * @throws NotFoundHttpException
     * @throws ServerErrorHttpException
     * 取消订单
     */
    private function cancel($order)
    {
        if ($order->status !== Order::STATUS_NONPAYMENT) {
            throw new BadRequestHttpException('订单状态异常');
        }
        $order->status = Order::STATUS_CANCEL;
        $this->updateStock($order, self::TYPE_ADD_STOCK);/*更新库存*/
    }

    /**
     * @param Order $order
     * @throws BadRequestHttpException
     * 确认收货
     */
    private function take($order)
    {
        if ($order->status !== Order::STATUS_SHIPMENT_ALL) {
            throw new BadRequestHttpException('订单状态异常');
        }
        $order->status = Order::STATUS_FINISH;
    }

    /**
     * @param $id
     * @param $type
     * @throws BadRequestHttpException
     * @throws NotFoundHttpException
     * @throws ServerErrorHttpException
     * 更新库存
     */
    private function updateStock($id, $type)
    {
        $allOrderGoods = $this->findOrderGoods($id);
        foreach ($allOrderGoods as $orderGoods) {
            /*检查库存*/
            Helper::checkStock($orderGoods->goods_id, $orderGoods->goods_count, $orderGoods->sku_id);
            if ($orderGoods->sku_id) {
                $goods = GoodsSku::findOne($orderGoods->sku_id);
            } else {
                $goods = Goods::findOne($orderGoods->goods_id);
            }
            if ($type) {
                $count = $orderGoods->goods_count;
            } else {
                $count = -$orderGoods->goods_count;
            }
            if (!$goods->updateCounters(['stock' => $count])) {
                throw new ServerErrorHttpException('更新库存失败');
            }
        }
    }

    /**
     * @param array $cartIds 购物车商品id
     * @param int $id 订单id
     * @throws Exception
     * @throws NotFoundHttpException
     * 通过购物车添加商品
     */
    private function addGoodsByCart($cartIds, $id)
    {
        foreach ($cartIds as $cartId) {
            $cart = Cart::findOne($cartId);
            if (!$cart) {
                throw new NotFoundHttpException('购物车未找到');
            }
            $this->addGoods($id, $cart->goods_id, $cart->sku_id, $cart->goods_count);
        }
    }

    /**
     * @param Order $order
     * @throws Exception
     * 保存商品总价格和总数量信息到
     */
    private function saveGoodsInfo($order)
    {
        $orderGoods = $this->findOrderGoods($order->id);
        foreach ($orderGoods as $goods) {
            $order->goods_amount += $goods->price;
            $order->goods_count += $goods->goods_count;
        }
        if (!$order->save()) {
            throw new Exception('服务器创建订单失败');
        }
    }


    /**
     * @param $id
     * @param int $goodsId
     * @param $skuId
     * @param $count
     * @throws Exception
     * @throws NotFoundHttpException
     * 添加商品到订单
     */
    private function addGoods($id, $goodsId, $skuId, $count)
    {
        $goods = Goods::findOne($goodsId);
        $orderGoods = new OrderGoods();
        $orderGoods->order_id = $id;
        $orderGoods->goods_id = $goodsId;
        $orderGoods->sku_id = $skuId ?: 0;
        $orderGoods->sku_value = Helper::skuValue($skuId);
        $orderGoods->weight = $skuId ? $this->skuWeight($skuId) : $goods->weight;
        $orderGoods->goods_count = $count;
        $orderGoods->goods_img = $goods->image;
        $orderGoods->goods_name = $goods->name;
        $orderGoods->price = Helper::goodsPrice($goodsId, $skuId);
        Helper::checkStock($goodsId, $count, $skuId); /*检查库存*/
        if (!$orderGoods->save()) {
            throw new Exception('服务器添加订单商品失败');
        }
    }

    private function skuWeight($skuId)
    {
        $sku = GoodsSku::findOne($skuId);
        if (!$sku) {
            throw new NotFoundHttpException('sku未找到');
        }
        return $sku->weight;
    }

    /**
     * @return array|Order|null
     * 根据id获取订单
     */
    private function findOrder()
    {
        $id = Yii::$app->request->getQueryParam('id');
        return Order::find()
            ->where(['id' => $id])
            ->andWhere(['user_id' => Yii::$app->user->getId()])
            ->one();
    }

    /**
     * @param $id
     * @return array|ActiveRecord[]|OrderGoods[]
     * 根据订单 id 获取所有订单商品
     */
    private function findOrderGoods($id)
    {
        return OrderGoods::find()
            ->where(['order_id' => $id])
            ->all();
    }


}