using vite env to pass serpapi key into the serpapi tool

Signed-off-by: charliehuang09 <charliehuang09@gmail.com>

src/lib/completion.ts

@@ -101,7 +101,6 @@ export class ChatbotCompletion {
 		return [new HumanMessage(formatted)];
 	};
 	private customOutputParser(text: AIMessageChunk): AgentAction | AgentFinish {
-
 		const content = text.lc_kwargs.content;
 		if (content.includes('Final Answer:')) {
 			const parts = content.split('Final Answer:');

src/lib/tools.ts

@@ -3,14 +3,22 @@ import { Calculator } from 'langchain/tools/calculator';
 import { DynamicTool, DynamicStructuredTool } from 'langchain/tools';
 import { z } from 'zod';
 
+if (import.meta.env.VITE_SERPAPI_API_KEY == undefined) {
+	throw new Error('SERPAPI_API_KEY is undefined');
+}
+
 const tools = [
 	new DynamicTool({
 		//for testing remove when merge
 		name: 'FOO',
 		description: 'call this to get the value of foo. input should be an empty string.',
 		func: async () => 'baz'
 	}),
-	new SerpAPI(),
+	new SerpAPI(import.meta.env.VITE_SERPAPI_API_KEY, {
+		location: 'Austin,Texas,United States',
+		hl: 'en',
+		gl: 'us'
+	}),
 	new DynamicStructuredTool({
 		//for testing remove when merge
 		name: 'random-number-generator',