import Fastify from 'fastify';
import fastifyStatic from '@fastify/static';
import fastifyCookie from '@fastify/cookie';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { existsSync } from 'node:fs';

import { openDb } from './db.js';
import { registerPublicRoutes } from './routes/public.js';
import { registerAdminRoutes } from './routes/admin.js';

const __dirname = dirname(fileURLToPath(import.meta.url));

const PORT = Number(process.env.PORT ?? 3000);
const HOST = process.env.HOST ?? '0.0.0.0';
const DB_PATH = process.env.DB_PATH ?? join(process.cwd(), 'wutz.db');

const app = Fastify({ logger: true });

await app.register(fastifyCookie);

const db = openDb(DB_PATH);

registerPublicRoutes(app, db);
registerAdminRoutes(app, db);

app.get('/healthz', async () => ({ ok: true }));

// Static client (built by Vite into client/dist)
const clientDist = join(__dirname, '..', '..', 'client', 'dist');
if (existsSync(clientDist)) {
  await app.register(fastifyStatic, {
    root: clientDist,
    prefix: '/',
    wildcard: false,
  });
  app.setNotFoundHandler((req, reply) => {
    if (req.url.startsWith('/api') || req.url.startsWith('/admin/api')) {
      reply.code(404).send({ error: 'not found' });
      return;
    }
    if (req.url.startsWith('/admin')) {
      reply.sendFile('admin.html');
      return;
    }
    reply.sendFile('index.html');
  });
} else {
  app.log.warn(`client dist not found at ${clientDist} — run \`pnpm --filter client build\``);
}

try {
  await app.listen({ port: PORT, host: HOST });
  app.log.info(`listening on http://${HOST}:${PORT}`);
} catch (err) {
  app.log.error(err);
  process.exit(1);
}