/**
 * systemd service installation
 */

import { $ } from 'bun';
import { getConfigPaths } from '../config/manager.js';
import { logger } from '../utils/logger.js';
import { getClientServiceTemplate, getServerServiceTemplate } from './templates.js';

const SERVER_SERVICE_PATH = '/etc/systemd/system/usbip-supervisor-server.service';
const CLIENT_SERVICE_PATH = '/etc/systemd/system/usbip-supervisor-client.service';

/**
 * Install server systemd service
 */
export async function installServerSystemd(configPath?: string): Promise<void> {
  try {
    // Check if running as root
    if (process.getuid?.() !== 0) {
      console.error('Error: Installing systemd service requires root privileges');
      console.log('Please run with sudo:');
      console.log('  sudo bunx @siwats/usbip-supervisor server --install-systemd');
      process.exit(1);
    }

    const config = configPath || getConfigPaths().server;
    const serviceContent = getServerServiceTemplate(config);

    // Write service file
    await Bun.write(SERVER_SERVICE_PATH, serviceContent);
    logger.info(`Wrote service file to ${SERVER_SERVICE_PATH}`);

    // Reload systemd
    await $`systemctl daemon-reload`.quiet();
    logger.info('Reloaded systemd daemon');

    // Enable service
    await $`systemctl enable usbip-supervisor-server`.quiet();
    logger.info('Enabled usbip-supervisor-server service');

    console.log('\n✓ Server service installed successfully!');
    console.log('\nTo start the service:');
    console.log('  sudo systemctl start usbip-supervisor-server');
    console.log('\nTo check status:');
    console.log('  sudo systemctl status usbip-supervisor-server');
    console.log('\nTo view logs:');
    console.log('  sudo journalctl -u usbip-supervisor-server -f');
  } catch (error) {
    logger.error(`Failed to install server service: ${error}`);
    throw error;
  }
}

/**
 * Install client systemd service
 */
export async function installClientSystemd(configPath?: string): Promise<void> {
  try {
    // Check if running as root
    if (process.getuid?.() !== 0) {
      console.error('Error: Installing systemd service requires root privileges');
      console.log('Please run with sudo:');
      console.log('  sudo bunx @siwats/usbip-supervisor client --install-systemd');
      process.exit(1);
    }

    const config = configPath || getConfigPaths().client;
    const serviceContent = getClientServiceTemplate(config);

    // Write service file
    await Bun.write(CLIENT_SERVICE_PATH, serviceContent);
    logger.info(`Wrote service file to ${CLIENT_SERVICE_PATH}`);

    // Reload systemd
    await $`systemctl daemon-reload`.quiet();
    logger.info('Reloaded systemd daemon');

    // Enable service
    await $`systemctl enable usbip-supervisor-client`.quiet();
    logger.info('Enabled usbip-supervisor-client service');

    console.log('\n✓ Client service installed successfully!');
    console.log('\nTo start the service:');
    console.log('  sudo systemctl start usbip-supervisor-client');
    console.log('\nTo check status:');
    console.log('  sudo systemctl status usbip-supervisor-client');
    console.log('\nTo view logs:');
    console.log('  sudo journalctl -u usbip-supervisor-client -f');
  } catch (error) {
    logger.error(`Failed to install client service: ${error}`);
    throw error;
  }
}