<?php

namespace api\logic;


use backend\modules\goods\models\ars\Goods;
use backend\modules\shop\models\ars\ExpressArea;
use backend\modules\shop\models\ars\ExpressTemplate;
use backend\modules\shop\models\ars\Order;
use backend\modules\shop\models\ars\OrderGoods;
use Yii;
use yii\base\BaseObject;
use yii\web\NotFoundHttpException;

/**
 * @author iron
 * @email weiriron@gmail.com
 * @package api\logic
 */
class ExpressLogic extends BaseObject
{
    public $viewAction = 'view';
    /**
     * @var Order
     * 订单
     */
    public $order;

    /**
     * @param $order
     * @return float|int
     * @throws NotFoundHttpException
     * 计算运费
     */
    public function countShippingAmount($order)
    {
        if ($order->shipping_type == Order::SHIPPING_TYPE_PICKED_UP) {
            return 0;
        }
        $this->order = $order;
        $allGoods = $this->findDifferentExpressTypeGoods($order);/*获取不同运费计算模式的商品*/
        $uniformPostage = $this->countGoodsExpress($allGoods['uniformPostageGoods'], Goods::EXPRESS_TYPE_UNIFORM_POSTAGE);/*计算统一运费模式下所有商品运费*/
        $expressTemplate = $this->countGoodsExpress($allGoods['uniformPostageGoods'], Goods::EXPRESS_TYPE_UNIFORM_POSTATE);/*计算运费模板模式下所有商品的运费*/
        return $uniformPostage > $expressTemplate ? $uniformPostage : $expressTemplate;/*比较两种不同运费计算模式下,取金额大的值为最终收取运费*/
    }

    /*--------------------------------------------------------------------------------------*/
    /**
     * @param $order
     * @return array
     * @throws NotFoundHttpException
     *
     */
    private function findDifferentExpressTypeGoods($order)
    {
        $uniformPostage = $useTemplate = [];
        $allGoods = OrderGoods::findAll(['order_id' => $order->id, 'user_id' => Yii::$app->user->getId()]);
        foreach ($allGoods as $orderGoods) {
            $goods = Goods::findOne(['id' => $orderGoods->goods_id, 'is_sale' => Goods::IS_SALE_YES, 'is_delete' => Goods::IS_DELETE_NO]);
            if (!$goods) {
                throw new NotFoundHttpException('商品未找到');
            }
            $goodsArr['object'] = $goods;
            $goodsArr['count'] = $orderGoods->goods_count;
            $goodsArr['weight'] = $orderGoods->weight;
            if ($goods->is_express && $goods->express_type == Goods::EXPRESS_TYPE_UNIFORM_POSTAGE) {
                $uniformPostage[] = $goodsArr;
            }
            if ($goods->is_express && $goods->express_type == Goods::EXPRESS_TYPE_EXPRESS_TEMPLATE) {
                $useTemplate[] = $goodsArr;
            }
        }
        return ['uniformPostageGoods' => $uniformPostage, 'useTemplateGoods' => $useTemplate];
    }

    /**
     * @param $allGoods
     * @param $type
     * @return float|int
     * @throws NotFoundHttpException
     */
    private function countGoodsExpress($allGoods, $type)
    {
        if (!$type == Goods::EXPRESS_TYPE_UNIFORM_POSTAGE) {
            $amount = 0;
            foreach ($allGoods['object'] as $goods) {
                $amount = $goods->uniform_postage > $amount ? $goods->uniform_postage : $amount;
            }
            return $amount;
        } else {
            $extraPrice = 0;
            $areasIds = [];
            foreach ($allGoods['object'] as $k => $goods) {
                $extraPrice += $this->countExtraAmount($allGoods['count'][$k], $allGoods['weight'][$k], $goods->express_template);
                $areasIds[] = $this->getAreaId($goods->express_template);
            }
            $basic = $this->getBasicPriceAndAreaId($areasIds);
            return $basic['price'] + $extraPrice - $this->countSurplusPrice($basic['id']);
        }
    }

    /**
     * @param $areaId
     * @return float|int
     * @throws NotFoundHttpException
     * 计算多余(多算的)运费
     * 选定的作为基础运费的计费规则的对应商品基础数量内的扩展费用
     */
    private function countSurplusPrice($areaId)
    {
        $area = $this->findArea($areaId);
        return $area->extra_price * ceil($area->basic_count / $area->extra_count);
    }

    /**
     * @param $areaIds
     * @return array
     * @throws NotFoundHttpException
     * 获取基础运费
     */
    private function getBasicPriceAndAreaId($areaIds)
    {
        $basePrice = $id = 0;
        foreach ($areaIds as $areasId) {
            $area = $this->findArea($areasId);
            if (!$area->basic_price > $basePrice) {
                continue;
            }
            $basePrice = $area->basic_price;
            $id = $areasId;
        }
        return ['price' => $basePrice, 'id' => $id];
    }

    /**
     * @param $count
     * @param $weight
     * @param $templateId
     * @return float|int
     * @throws NotFoundHttpException
     * 计算扩展运费
     */
    private function countExtraAmount($count, $weight, $templateId)
    {
        $area = $this->findArea($this->getAreaId($templateId));
        $template = $this->findTemplate($templateId);
        if ($template->calculation_type == ExpressTemplate::CALCULATION_TYPE_WEIGHT) {
            $amount = $area->extra_price * ceil($weight / $area->extra_count);
        } else {
            $amount = $area->extra_price * ceil($count / $area->extra_count);
        }
        return $amount;
    }

    /**
     * @param $templateId
     * @return int
     * @throws NotFoundHttpException
     * 根据运费模板和收货地址获取区域
     */
    private function getAreaId($templateId)
    {
        $areas = ExpressArea::findALl(['express_template' => $templateId]);
        $city = $this->order->city;
        foreach ($areas as $area) {
            $allCity = explode(',', $area->city);
            if (in_array($city, $allCity)) {
                return $area->id;
            }
        }
        throw new NotFoundHttpException('超出配送范围(无对应地区运费计算规则)');
    }

    /**
     * @param $areaId
     * @return ExpressArea|null
     * @throws NotFoundHttpException
     * 获取对应区域
     */
    private function findArea($areaId)
    {
        $area = ExpressArea::findOne($areaId);
        if (!$area) {
            throw new NotFoundHttpException('模板地区未找到');
        }
        return $area;
    }

    /**
     * @param $templateId
     * @return ExpressTemplate|null
     * @throws NotFoundHttpException
     * 获取运费模板
     */
    private function findTemplate($templateId)
    {
        $template = ExpressTemplate::findOne($templateId);
        if (!$template) {
            throw new NotFoundHttpException('运费模板未找到');
        }
        return $template;
    }
}