// Made by @charlestehio: https://x.com/charlestehio
// Usage: https://abc.workers.dev/?query=your%20embedding%20query

import { Ai } from './vendor/@cloudflare/ai.js';

export default {
  async fetch(request, env) {
    // Parse the URL to get query parameters
    const url = new URL(request.url);
    var query = url.searchParams.get('query');

    // Check if the query parameter exists and is not empty
    // If the query parameter does not exist or is empty, return {"response": null}
    if (!query) {
      return new Response(JSON.stringify({ response: null }), { 
        status: 400,
        headers: { 'Content-Type': 'application/json' } 
      });
    }

    // Clean the query using regex. This regex filters the query string to remove any characters
    // that are not letters (a-z, A-Z), numbers (0-9), whitespace (spaces, tabs, etc.), commas, or periods.
    // For example, if the input query is "Hello! How are you? #Cloudflare", the regex will remove
    // the exclamation mark (!), question mark (?), and hash (#), resulting in the cleaned query
    // "Hello How are you Cloudflare".
    query = query.replace(/[^a-zA-Z0-9\s,\.]/g, '').trim();

    const ai = new Ai(env.AI);
    const input = {
      text: `${query}`
    };
    const response = await ai.run('@cf/baai/bge-small-en-v1.5', input);
    return new Response(JSON.stringify({ response }), { headers: { 'Content-Type': 'application/json' } });
  }
};