<?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\base\BaseObject;
use yii\web\NotFoundHttpException;

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

    /**
     * @param $order
     * @return float|int
     * @throws NotFoundHttpException
     * 计算运费
     */
    public function countShippingAmount($order)
    {
        $this->order = $order;
        $allGoods = $this->findDifferentExpressTypeGoods();/*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['useTemplateGoods'], Goods::EXPRESS_TYPE_EXPRESS_TEMPLATE);/*计算运费模板模式下所有商品的运费*/
        $amount = $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*/
        return $amount / 100; /*将金额单位[分]转化为[元]*/
    }

    /*--------------------------------------------------------------------------------------*/
    /**
     * @return array
     * @throws NotFoundHttpException
     * 获取不同运费计算模式的商品
     */
    private function findDifferentExpressTypeGoods()
    {
        $uniformPostage = $useTemplate = [];
        $allGoods = OrderGoods::findAll(['order_id' => $this->order->id]);
        foreach ($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 $type
     * @return float|int
     * @throws NotFoundHttpException
     * 根据不同计费模式计算商品运费
     */
    private function countGoodsExpress($allGoods, $type)
    {
        if ($type == Goods::EXPRESS_TYPE_UNIFORM_POSTAGE) {
            $amount = 0;
            foreach ($allGoods as $goods) {
                $amount = $goods['object']->uniform_postage > $amount ? $goods['object']->uniform_postage : $amount;
            }
            return $amount;
        } else {
            $extraPrice = 0;
            $areasIds = $basicGoods = [];
            foreach ($allGoods as $goods) {
                $areasIds[] = $this->getAreaId($goods['object']->express_template);/*获取所有配送区域的id*/
            }
            $basicId = $this->getBasicAreaId($areasIds);/*获取首重运费和对应的计费规则id*/
            foreach ($allGoods as $k => $goods) {
                $res = $this->countExtraAmount($goods, $basicId);/*判断商品绑定的是否为基础模板并计算非基础模板商品的增重运费*/
                if (is_bool($res) && $res === true) {
                    $basicGoods[] = $allGoods[$k];
                    continue;
                }
                $extraPrice += $res;
            }
            $basicPrice = $this->countBasicPrice($basicGoods, $basicId);/*计算基础模板商品的运费*/
            return $extraPrice + $basicPrice;
        }
    }

    /**
     * @param $allGoods
     * @param $areaId
     * @return float|int
     * @throws NotFoundHttpException
     * 计算基础模板商品的运费价格
     */
    private function countBasicPrice($allGoods, $areaId)
    {
        $area = $this->findArea($areaId);
        $count = $weight = 0;
        $template = $this->findTemplate($area->express_template);
        foreach ($allGoods as $goods) {
            $count += $goods['count'];
            $weight += $goods['weight'];
        }
        if ($template->calculation_type == ExpressTemplate::CALCULATION_TYPE_WEIGHT) {
            $amount = $weight - $area->basic_count > 0 ? $weight - $area->basic_count : 0;
        } else {
            $amount = $weight - $area->basic_count > 0 ? $weight - $area->basic_count : 0;
        }
        return $area->basic_price + $area->extra_price * ceil($amount / $area->extra_count);
    }

    /**
     * @param $areaIds
     * @return int
     * @throws NotFoundHttpException
     * 获取基础运费的区域id
     */
    private function getBasicAreaId($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 $id;
    }

    /**
     * @param $goods
     * @param $areaId
     * @return bool|int
     * @throws NotFoundHttpException
     * 计算非使用基础运费模板的商品按增重运费计算运费
     */
    private function countExtraAmount($goods, $areaId)
    {
        $count = $goods['count'];
        $weight = $goods['weight'];
        $area = $this->findArea($this->getAreaId($goods['object']->express_template));
        $template = $this->findTemplate($goods['object']->express_template);
        if ($area->id == $areaId) {
            return true;
        }
        if ($template->calculation_type == ExpressTemplate::CALCULATION_TYPE_WEIGHT) {
            $amount = $weight;
        } else {
            $amount = $count;
        }
        return $area->extra_price * ceil($amount / $area->extra_count);
    }

    /**
     * @param $templateId
     * @return int
     * @throws NotFoundHttpException
     * 根据收货地址获取配送区域id
     */
    private function getAreaId($templateId)
    {
        $city = $this->order->city;
        $areas = ExpressArea::findALl(['express_template' => $templateId]);
        foreach ($areas as $area) {
            $allCity = explode(',', $area->city);
            if (in_array($city, $allCity)) {
                return $area->id;
            }
        }
        throw new NotFoundHttpException('超出配送范围(未找到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;
    }
}