From 9d891fb7028a6b0e61bf8d72be391811812ef69a Mon Sep 17 00:00:00 2001
From: kurihada <kurihada@qq.com>
Date: Mon, 2 Mar 2026 10:21:00 +0800
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agent 之前完全靠 LLM 猜测地理距离，现在可以查询真实驾车时间，超过 30 分钟会换更近地点。
同时修复 dev 端口未生效的问题（next dev 加 --port 3721）。
---
 package.json               |  2 +-
 src/lib/blindboxPlanGen.ts | 55 +++++++++++++++++++++++++++++++++++---
 2 files changed, 53 insertions(+), 4 deletions(-)

diff --git a/package.json b/package.json
index ed02c73..1a9e717 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev",
+    "dev": "next dev --port 3721",
     "build": "next build",
     "start": "next start",
     "lint": "eslint",
diff --git a/src/lib/blindboxPlanGen.ts b/src/lib/blindboxPlanGen.ts
index b3e9b01..75c3f87 100644
--- a/src/lib/blindboxPlanGen.ts
+++ b/src/lib/blindboxPlanGen.ts
@@ -195,6 +195,7 @@ export interface PlanGenResult {
 const AGENT_SYSTEM_PROMPT = `你是一个周末行程规划 Agent。你有以下工具可以使用：
 - list_ideas: 查看想法池中的所有活动
 - search_poi: 在地图上搜索地点（支持品牌名、地名、品类搜索）
+- get_travel_time: 查询两点间驾车时间和距离
 - finalize_plan: 提交最终行程方案
 
 规划流程：
@@ -202,8 +203,9 @@ const AGENT_SYSTEM_PROMPT = `你是一个周末行程规划 Agent。你有以下
 2. 根据时间、多样性、强度平衡选出合适的活动组合
 3. 为每个活动 search_poi 找到具体地点
 4. 如果搜索结果不理想（0结果或不相关），尝试换关键词重搜
-5. 综合地理位置、时间安排、活动特点，规划最优路线
-6. 确认无误后 finalize_plan 提交
+5. 用 get_travel_time 检查关键路段的交通时间，如果某段超过 30 分钟考虑换更近的地点
+6. 综合地理位置、时间安排、活动特点，规划最优路线
+7. 确认无误后 finalize_plan 提交
 
 规划原则：
 - 地理位置相近，最小化移动距离
@@ -297,6 +299,53 @@ function buildAgentTools(
     },
   };
 
+  const getTravelTimeTool: AgentTool = {
+    name: "get_travel_time",
+    description: "查询两点之间的驾车预估时间和距离。用于验证活动之间的交通是否合理",
+    parameters: {
+      type: "object",
+      properties: {
+        origin_lat: { type: "number", description: "起点纬度" },
+        origin_lng: { type: "number", description: "起点经度" },
+        dest_lat: { type: "number", description: "终点纬度" },
+        dest_lng: { type: "number", description: "终点经度" },
+      },
+      required: ["origin_lat", "origin_lng", "dest_lat", "dest_lng"],
+    },
+    execute: async (args) => {
+      const oLat = Number(args.origin_lat);
+      const oLng = Number(args.origin_lng);
+      const dLat = Number(args.dest_lat);
+      const dLng = Number(args.dest_lng);
+      const apiKey = requireAmapApiKey();
+      const url = new URL("https://restapi.amap.com/v5/direction/driving");
+      url.searchParams.set("key", apiKey);
+      url.searchParams.set("origin", `${oLng},${oLat}`);
+      url.searchParams.set("destination", `${dLng},${dLat}`);
+      url.searchParams.set("show_fields", "cost");
+      try {
+        const res = await fetch(url.toString());
+        const data = await res.json();
+        if (data.status !== "1" || !data.route?.paths?.length) {
+          return JSON.stringify({ error: "未找到路线" });
+        }
+        const path = data.route.paths[0];
+        return JSON.stringify({
+          distanceKm: Math.round(Number(path.distance) / 100) / 10,
+          durationMin: Math.ceil(Number(path.duration) / 60),
+        });
+      } catch {
+        return JSON.stringify({ error: "路线查询失败" });
+      }
+    },
+    progressBefore: () => "正在查询交通时间...",
+    progressAfter: (_args, result) => {
+      const r = JSON.parse(result);
+      if (r.error) return `路线查询失败`;
+      return `驾车约 ${r.durationMin} 分钟（${r.distanceKm}km）`;
+    },
+  };
+
   const finalizePlanTool: AgentTool = {
     name: "finalize_plan",
     description: "提交最终行程方案。days 数组中每个元素包含 date、items（活动列表）和 summary",
@@ -341,7 +390,7 @@ function buildAgentTools(
     progressAfter: () => "行程规划完成！",
   };
 
-  return [listIdeasTool, searchPoiTool, finalizePlanTool];
+  return [listIdeasTool, searchPoiTool, getTravelTimeTool, finalizePlanTool];
 }
 
 async function runAgentPlanGeneration(