From a96fb4e518cdee6f2e452b94a402ff7888350258 Mon Sep 17 00:00:00 2001
From: yh <1844516659@qq.com>
Date: Mon, 18 Jul 2022 16:36:12 +0800
Subject: [PATCH] =?UTF-8?q?=E9=A3=9E=E6=BB=B4=E5=87=BA=E8=A1=8C=E7=BD=91?=
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---
 .../service/ForecastPriceService.java         | 61 ++++++++++++++++++-
 1 file changed, 60 insertions(+), 1 deletion(-)

diff --git a/service-price/src/main/java/com/mashibing/serviceprice/service/ForecastPriceService.java b/service-price/src/main/java/com/mashibing/serviceprice/service/ForecastPriceService.java
index e43168f..c205150 100644
--- a/service-price/src/main/java/com/mashibing/serviceprice/service/ForecastPriceService.java
+++ b/service-price/src/main/java/com/mashibing/serviceprice/service/ForecastPriceService.java
@@ -12,6 +12,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.math.BigDecimal;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -67,9 +68,67 @@ public class ForecastPriceService {
 
         // 根据 距离时长 进行价格预估
         ForecastPriceResponse priceResponse = new ForecastPriceResponse();
-        priceResponse.setPrice(12.34);
+        Double price = getPriceByRule(distance, duration, priceRule);
+        priceResponse.setPrice(price);
 
         return ResponseResult.success(priceResponse);
     }
 
+    /**
+     根据距离、时长和计价规则，计算最终价格
+     *@param distance 距离
+     * @param duration 时长
+     * @param priceRule 计价规则
+     *@return
+     */
+    private Double getPriceByRule (Integer distance,Integer duration,PriceRule priceRule) {
+        // BigDecimal
+        BigDecimal sumPriceDecimal = new BigDecimal(0);
+        // 起步价
+        Double startFare = priceRule.getStartFare();
+        BigDecimal startFareDecimal = new BigDecimal(startFare);
+        sumPriceDecimal = sumPriceDecimal.add(startFareDecimal);
+
+        //里程费
+        // 总里程 m => km
+        BigDecimal distanceDecimal = new BigDecimal(distance);
+        BigDecimal distanceMileDecimal = distanceDecimal.divide(new BigDecimal(1000), 2, BigDecimal.ROUND_HALF_UP);
+        // 起步里程
+        Integer startMile = priceRule.getStartMile();
+        BigDecimal startMileDecimal = new BigDecimal(startMile);
+        // 需收费的里程数
+        double mileTmp = distanceMileDecimal.subtract(startMileDecimal).doubleValue();
+        if(mileTmp < 0){
+            mileTmp = 0;
+        }
+        BigDecimal subMileDecimal = new BigDecimal(mileTmp);
+        // 获取计费规则-每公里收费
+        Double unitPricePerMile = priceRule.getUnitPricePerMile();
+        BigDecimal unitPricePerMileDecimal = new BigDecimal(unitPricePerMile);
+        // 计算最终里程费用
+        BigDecimal finalMileFareDecimal = subMileDecimal.multiply(unitPricePerMileDecimal).setScale(2, BigDecimal.ROUND_HALF_UP);
+        sumPriceDecimal = sumPriceDecimal.add(finalMileFareDecimal);
+
+        //时长费
+        // 时长的分钟数 s => min
+        BigDecimal durationDecimal = new BigDecimal(duration);
+        BigDecimal durationMinDecimal = durationDecimal.divide(new BigDecimal(60), 2, BigDecimal.ROUND_HALF_UP);
+        // 获取计费规则-每分钟收费
+        Double unitPricePerMinute = priceRule.getUnitPricePerMinute();
+        BigDecimal unitPricePerMinuteDecimal = new BigDecimal(unitPricePerMinute);
+        // 计算最终时长费用
+        BigDecimal finalTimeFareDecimal = durationMinDecimal.multiply(unitPricePerMinuteDecimal.setScale(2, BigDecimal.ROUND_HALF_UP));
+        sumPriceDecimal = sumPriceDecimal.add(finalTimeFareDecimal);
+
+        return sumPriceDecimal.doubleValue();
+    }
+
+//    public static void main(String[] args) {
+//        PriceRule priceRule = new PriceRule();
+//        priceRule.setUnitPricePerMile(1.8);
+//        priceRule.setUnitPricePerMinute(0.5);
+//        priceRule.setStartFare(10.0);
+//        priceRule.setStartMile(3);
+//        System.out.println( getPriceByRule(6500 , 1800 , priceRule) );
+//    }
 }
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