'use server';

import db from '@/lib/db';
import type { User } from '@/types';
import { randomUUID } from 'crypto';

interface RegisterUserResult {
  success: boolean;
  message: string;
  user?: User;
}

export async function registerUser(data: { name: string; email: string; password?: string }): Promise<RegisterUserResult> {
  const { name, email } = data;

  // Basic validation
  if (!name || !email) {
    return { success: false, message: 'Name and email are required.' };
  }

  try {
    // Check if user already exists
    const existingUser = db.prepare('SELECT * FROM users WHERE email = ?').get(email);
    if (existingUser) {
      return { success: false, message: 'An account with this email already exists.' };
    }

    const newUser: User = {
      id: `user-${randomUUID()}`,
      name,
      email,
      role: 'User',
      avatarUrl: '', 
      bio: ''
    };

    const stmt = db.prepare(
      'INSERT INTO users (id, name, email, role, avatarUrl, bio) VALUES (@id, @name, @email, @role, @avatarUrl, @bio)'
    );

    stmt.run(newUser);

    return { success: true, message: 'User registered successfully.', user: newUser };
  } catch (error) {
    console.error('Registration error:', error);
    return { success: false, message: 'An unexpected error occurred during registration.' };
  }
}