<?php

namespace app\base\logic;


class Freight extends Base
{

    /**
     * 获取商品的运费模板并进行计算
     * @param int $freight_id 运费模板ID
     * @param string $weight 单件商品重量
     * @param int $number 商品数量
     * @param string $price 商品价格
     * @param int $province_id 配送地址省ID
     * @param int $city_id 配送地址城市ID
     * @param int $area_id 配送地址区ID
     * @date 2022-11-22
     */
    public function getFreight($freight_id = 0, $weight = '', $number = 0, $price = '', $province_id = 0, $city_id = 0, $area_id = 0)
    {
        $freight_model = new \app\base\model\freight\Freight();

        if (empty($freight_id)) {
            return 0;
        }

        // 获取运费
        $freight = $freight_model->getOneData([
            ['id', '=', $freight_id]
        ]);
        if (empty($freight)) {
            return 0;
        }

        // 判断是否该商品免运费（是否满足满X元包邮）
        if ($price * $number >= $freight['free_money']) {
            return 0;
        }

        $start_standard = 0; //首件或首重
        $start_fee = 0;//首费
        $add_standard = 0;//续件或续重
        $add_fee = 0;//续费
        $standard = 0; //进行判断的标准

        #TODO  可以将2种计费方式的字段统一到一个字段  运费规则是否符合标准逻辑
        if ($freight['type'] == 1) { //计费方式 1--按件计费 2--按重计费
            $start_standard = $freight['first_number'];
            $start_fee = $freight['first_number_money'];
            $add_standard = $freight['second_number'];
            $add_fee = $freight['second_number_money'];
            $standard = $number;
        } else if ($freight['type'] == 2) {
            $start_standard = $freight['first_weight'];
            $start_fee = $freight['first_weight_money'];
            $add_standard = $freight['second_weight'];
            $add_fee = $freight['second_weight_money'];
            $standard = $weight * $number;
        }

        if (!empty($freight['fee_conf'])) { //运费模板中运费信息对象，包含默认运费和指定地区运费
            foreach ($freight['fee_conf'] as $key => $value) {
                if ((!empty($province_id) && array_key_exists($province_id, $value['province_list'])) &&
                    (!empty($city_id) && array_key_exists($city_id, $value['city_list'])) &&
                    (!empty($area_id) && array_key_exists($area_id, $value['area_list']))
                ) {
                    $start_standard = $value['start_standard'];
                    $start_fee = $value['start_fee'];
                    $add_standard = $value['add_standard'];
                    $add_fee = $value['add_fee'];
                    break;
                }
            }
        }

        // 计算并返回金额
        return $this->computedFreight($standard, $start_standard, $start_fee, $add_standard, $add_fee);

    }

    /**
     * 计算并返回金额
     * @param int $standard 进行判断的标准
     * @param int $start_standard 首个 标准
     * @param int $start_fee 首个 收费
     * @param int $add_standard 续 标准
     * @param int $add_fee 续 收费
     * @date 2021-03-01
     */
    public function computedFreight($standard = 0, $start_standard = 0, $start_fee = 0, $add_standard = 0, $add_fee = 0)
    {
        //小于等于首（件/重），运费=取首（件/重）费；以此类推。
        if ($standard <= $start_standard) {
            return $start_fee;
        }

        //超出首（件/重）后，超出部分小于等于续（件/重），运费=首重+续费，
        return $start_fee + ceil(($standard - $start_standard) / $add_standard) * $add_fee;
    }

}