#!/usr/bin/env node
import { input, password, select, confirm } from '@inquirer/prompts';
import Database from 'better-sqlite3';
import bcrypt from 'bcrypt';

const DB_FILE = 'ac_data.db';

const db = new Database(DB_FILE);
db.exec(`
  CREATE TABLE IF NOT EXISTS users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    username TEXT UNIQUE NOT NULL,
    password_hash TEXT NOT NULL,
    role TEXT NOT NULL DEFAULT 'user',
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
  )
`);

const insertUser = db.prepare('INSERT INTO users (username, password_hash, role) VALUES (?, ?, ?)');
const getAllUsers = db.prepare('SELECT id, username, role, created_at FROM users ORDER BY id');
const getUserById = db.prepare('SELECT * FROM users WHERE id = ?');
const updateUserRole = db.prepare('UPDATE users SET role = ? WHERE id = ?');
const updateUserPassword = db.prepare('UPDATE users SET password_hash = ? WHERE id = ?');
const deleteUser = db.prepare('DELETE FROM users WHERE id = ?');

console.log('\n╔══════════════════════════════════════╗');
console.log('║   🔐 User Manager - AC Dashboard     ║');
console.log('╚══════════════════════════════════════╝\n');

async function listUsers() {
    const users = getAllUsers.all();
    if (users.length === 0) {
        console.log('  No users found.\n');
        return;
    }
    console.log('  ID  │ Username       │ Role   │ Created');
    console.log('  ────┼────────────────┼────────┼─────────────────────');
    users.forEach(u => {
        const id = String(u.id).padStart(3);
        const name = u.username.padEnd(14);
        const role = u.role.padEnd(6);
        const date = u.created_at?.slice(0, 16) || 'N/A';
        const roleColor = u.role === 'admin' ? '\x1b[35m' : '\x1b[33m';
        console.log(`  ${id} │ ${name} │ ${roleColor}${role}\x1b[0m │ ${date}`);
    });
    console.log('');
}

async function createUser() {
    const username = await input({
        message: 'Username:',
        validate: v => v.length >= 3 || 'Min 3 characters'
    });

    const pwd = await password({
        message: 'Password:',
        mask: '*',
        validate: v => v.length >= 4 || 'Min 4 characters'
    });

    const role = await select({
        message: 'Role:',
        choices: [
            { name: '👤 user', value: 'user' },
            { name: '👑 admin', value: 'admin' }
        ]
    });

    try {
        const hash = await bcrypt.hash(pwd, 10);
        insertUser.run(username, hash, role);
        console.log(`\n✅ User "${username}" created as ${role}\n`);
    } catch (e) {
        if (e.code === 'SQLITE_CONSTRAINT_UNIQUE') {
            console.log(`\n❌ User "${username}" already exists\n`);
        } else throw e;
    }
}

async function editUser() {
    const users = getAllUsers.all();
    if (users.length === 0) {
        console.log('  No users to edit.\n');
        return;
    }

    const userId = await select({
        message: 'Select user to edit:',
        choices: users.map(u => ({
            name: `${u.username} (${u.role})`,
            value: u.id
        }))
    });

    const action = await select({
        message: 'What to change?',
        choices: [
            { name: '🔑 Change password', value: 'password' },
            { name: '👤 Change role', value: 'role' },
            { name: '← Back', value: 'back' }
        ]
    });

    if (action === 'back') return;

    if (action === 'password') {
        const pwd = await password({
            message: 'New password:',
            mask: '*',
            validate: v => v.length >= 4 || 'Min 4 characters'
        });
        const hash = await bcrypt.hash(pwd, 10);
        updateUserPassword.run(hash, userId);
        console.log('\n✅ Password updated\n');
    }

    if (action === 'role') {
        const user = getUserById.get(userId);
        const newRole = await select({
            message: 'New role:',
            choices: [
                { name: '👤 user', value: 'user' },
                { name: '👑 admin', value: 'admin' }
            ],
            default: user.role
        });
        updateUserRole.run(newRole, userId);
        console.log(`\n✅ Role changed to ${newRole}\n`);
    }
}

async function removeUser() {
    const users = getAllUsers.all();
    if (users.length === 0) {
        console.log('  No users to delete.\n');
        return;
    }

    const userId = await select({
        message: 'Select user to delete:',
        choices: users.map(u => ({
            name: `${u.username} (${u.role})`,
            value: u.id
        }))
    });

    const user = getUserById.get(userId);
    const confirmed = await confirm({
        message: `Delete user "${user.username}"?`,
        default: false
    });

    if (confirmed) {
        deleteUser.run(userId);
        console.log(`\n✅ User "${user.username}" deleted\n`);
    } else {
        console.log('\n❌ Cancelled\n');
    }
}

async function main() {
    while (true) {
        try {
            const action = await select({
                message: 'What would you like to do?',
                choices: [
                    { name: '📋 List users', value: 'list' },
                    { name: '➕ Create user', value: 'create' },
                    { name: '✏️  Edit user', value: 'edit' },
                    { name: '🗑️  Delete user', value: 'delete' },
                    { name: '🚪 Exit', value: 'exit' }
                ]
            });

            if (action === 'exit') {
                console.log('Bye!\n');
                break;
            }

            if (action === 'list') await listUsers();
            if (action === 'create') await createUser();
            if (action === 'edit') await editUser();
            if (action === 'delete') await removeUser();

        } catch (e) {
            if (e.name === 'ExitPromptError') {
                console.log('\nBye!\n');
                break;
            }
            throw e;
        }
    }
}

main();