// app/actions/auth.js
'use server'

import { queryOne, run } from '../../lib/db';
import bcrypt from 'bcryptjs';

// Register a new user
export async function registerUser(formData) {
    try {
        const username = formData.get('username');
        const password = formData.get('password');

        // Check if user already exists
        const existingUser = await queryOne(
            'SELECT * FROM users WHERE username = ?',
            [username]
        );

        if (existingUser) {
            return { success: false, error: 'Username already exists' };
        }

        // Hash the password
        const hashedPassword = await bcrypt.hash(password, 10);

        // Insert the new user
        const result = await run(
            'INSERT INTO users (username, password, role) VALUES (?, ?, ?)',
            [username, hashedPassword, 'user']
        );

        return {
            success: true,
            userId: result.lastID
        };
    } catch (error) {
        console.error('Registration error:', error);
        return {
            success: false,
            error: 'Registration failed: ' + error.message
        };
    }
}

// Login function (to be used with NextAuth)
export async function validateCredentials(username, password) {
    try {
        const user = await queryOne(
            'SELECT * FROM users WHERE username = ?',
            [username]
        );

        if (!user) {
            return null;
        }

        // Using bcrypt.compare to properly compare hashed passwords
        const isValid = await bcrypt.compare(password, user.password);

        if (!isValid) {
            return null;
        }

        return {
            id: user.id,
            username: user.username,
            role: user.role,
            teamId: user.team_id
        };
    } catch (error) {
        console.error('Login error:', error);
        return null;
    }
}

// Other functions remain the same...