How to implement AI Chatbot Basic Setup in Typescript

1import OpenAI from 'openai';
2import * as readline from 'readline';
3
4const client = new OpenAI({
5  apiKey: process.env.OPENAI_API_KEY,
6});
7
8const messages: OpenAI.Messages.ChatCompletionMessageParam[] = [
9  {
10    role: 'system',
11    content: 'You are a helpful assistant. Be concise and friendly.',
12  },
13];
14
15async function chat(userMessage: string): Promise<string> {
16  messages.push({
17    role: 'user',
18    content: userMessage,
19  });
20
21  const response = await client.chat.completions.create({
22    model: 'gpt-4o-mini',
23    messages,
24    temperature: 0.7,
25  });
26
27  const assistantMessage = response.choices[0].message.content || '';
28  messages.push({
29    role: 'assistant',
30    content: assistantMessage,
31  });
32
33  return assistantMessage;
34}
35
36// Simple CLI interface
37async function main() {
38  const rl = readline.createInterface({
39    input: process.stdin,
40    output: process.stdout,
41  });
42
43  console.log('Chatbot ready. Type your message (or "exit" to quit):\n');
44
45  const prompt = () => {
46    rl.question('You: ', async (input) => {
47      if (input.toLowerCase() === 'exit') {
48        rl.close();
49        return;
50      }
51
52      const response = await chat(input);
53      console.log(`\nAssistant: ${response}\n`);
54      prompt();
55    });
56  };
57
58  prompt();
59}
60
61main();