import { Router } from 'express';
import { AuthManager } from '../auth/index.ts';
import { resolveCredential } from '../helper/credential.ts';

export default (auth: AuthManager) => {
  const router = Router();

  router.post('/', async (req, res) => {
    try {
      console.log('🚀 Initiating new login flow');

      // เริ่ม device code flow โดยรับ overrides จาก headers (tenantId, clientId, scopes)
      const credential = resolveCredential(req);
      if (!credential.tenantId) {
        throw new Error('tenantId is required');
      }
      const deviceCodeInfo = await auth.initiateDeviceCodeFlow(credential as Required<typeof credential>);

      // ส่ง device code info และ sessionId กลับไปให้ client
      res.json({
        success: true,
        message: 'Please complete authentication using the device code',
        sessionId: deviceCodeInfo.sessionId,
        deviceCode: deviceCodeInfo.userCode,
        verificationUrl: deviceCodeInfo.verificationUrl,
        instructions: deviceCodeInfo.message,
      });
    } catch (err: any) {
      console.error('Login error:', err.message);
      res.status(500).json({ error: err.message });
    }
  });

  return router;
};