Basic JavaScript AI API Concept

// OpenAI API call from Node.js
// Install: npm install openai
// Set environment variable: set OPENAI_API_KEY=your-key-here

import OpenAI from 'openai';

// NEVER hardcode the API key. Read from environment variables.
const client = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY,  // Reads from environment variable
});

async function askAI(question) {
  try {
    const response = await client.chat.completions.create({
      model: 'gpt-4o-mini',
      messages: [
        {
          role: 'system',
          content: 'You are a helpful tutor for beginners learning Generative AI.',
        },
        {
          role: 'user',
          content: question,
        },
      ],
      max_tokens: 300,
      temperature: 0.7,
    });

    // Extract the text from the response
    return response.choices[0].message.content;

  } catch (error) {
    // Handle errors gracefully
    if (error.status === 401) {
      return 'Error: Invalid API key. Check your OPENAI_API_KEY environment variable.';
    }
    if (error.status === 429) {
      return 'Error: Rate limit reached. Please wait a moment before trying again.';
    }
    return `Error: ${error.message}`;
  }
}

// Example usage
const question = 'What is prompt engineering?';
askAI(question).then(answer => {
  console.log('Question:', question);
  console.log('Answer:', answer);
});