import { Database } from 'bun:sqlite';

const db = new Database('../data/data.db');
db.exec('PRAGMA journal_mode = WAL;');

Bun.serve({
  fetch(req) {
    console.log('req object', req);
    const url = new URL(req.url);
    if (url.pathname === '/') return new Response('Home page!');
    if (req.method === 'POST' && url.pathname === '/api')
      return handlePost(req, url);
    if (req.method === 'GET' && url.pathname.startsWith('/api'))
      return handleGet(req, url);
    return new Response('404!');
  },
});

async function handleGet(_req: Request, url: URL) {
  if (url.pathname === '/api/resource') return handleGetResource(url);
  else return new Response('huh');
}
function handleGetResource(url: URL) {
  const params = new URLSearchParams(url.search);
  console.log(params);
  const type = params.get('type');
  const resource = params.get('res');
  const data = fetchResource(type!, resource!);
  return Response.json({ ok: true, data });
}

async function handlePost(req: Request, url: URL) {
  const data = await req.json();
  if (url.pathname === '/api/user') return handlePostUser(data);
  else return new Response('huh');
}
// https://bun.sh/guides/http/server
type PostUser = { name: string; creds: string };
function handlePostUser(user: PostUser) {
  addUser(user.name, user.creds);
  return new Response('ok');
}

function addUser(name: string, creds: string) {
  const query = db.query(`
    INSERT 
    INTO users(name, creds) 
    VALUES($name, $creds)
  `);
  query.run({ $name: name, $creds: creds });
}

function fetchResource(type: string, resource: string) {
  if (type === 'word') return fetchWord(resource);
  else return {};
}
function fetchWord(word: string) {
  const query = db.query(`
    SELECT 
      spelling,
      ipa,
      languages.name AS language,
      GROUP_CONCAT(c.name, ',') AS category,
      ps.name AS pos
    FROM words
    JOIN languages ON languages.id = words.language_id
    JOIN word_categories wc ON words.id = wc.word_id
    JOIN categories c ON wc.category_id = c.id
    JOIN parts_of_speech ps ON ps.id = c.part_of_speech_id
    WHERE spelling = $spelling
    GROUP BY words.id
    `);
  return query.get({ $spelling: word });
}