/**
 * Backend Server
 * 
 * Hono API server with auth routes pre-configured.
 */

import { Hono } from 'hono';
import { cors } from 'hono/cors';
import { getAuthUrl, handleCallback, getConfigFromEnv } from './modules/auth';

const app = new Hono();

// CORS for frontend
app.use('/*', cors({
  origin: ['http://localhost:5173', 'http://localhost:3005'],
  credentials: true,
}));

// Health check
app.get('/health', (c) => c.json({ status: 'ok' }));

// ============================================
// AUTH ROUTES
// ============================================

const authConfig = getConfigFromEnv();

app.get('/auth/login', (c) => {
  return c.redirect(getAuthUrl(authConfig));
});

app.get('/auth/callback', async (c) => {
  const code = c.req.query('code');
  
  if (!code) {
    return c.json({ error: 'No authorization code' }, 400);
  }

  try {
    const result = await handleCallback(code, authConfig);
    
    // Return token and user info
    // Frontend should store token and redirect
    return c.json(result);
  } catch (err) {
    const message = err instanceof Error ? err.message : 'Auth failed';
    return c.json({ error: message }, 403);
  }
});

// ============================================
// API ROUTES
// ============================================

app.get('/api/me', async (c) => {
  // TODO: Validate token from Authorization header
  // Return current user info
  return c.json({ message: 'Implement me' });
});

// ============================================
// START SERVER
// ============================================

const port = Number(process.env.PORT) || 3005;

console.log(`[Server] Starting on port ${port}...`);

export default {
  port,
  fetch: app.fetch,
};