import * as plugins from '../../../plugins.js';
import * as paths from '../../../paths.js';
import { tspmIpcClient } from '../../../classes.ipcclient.js';
import { Logger } from '../../../utils.errorhandler.js';
import type { CliArguments } from '../../types.js';
import { formatMemory } from '../../helpers/memory.js';

export function registerDaemonCommand(smartcli: plugins.smartcli.Smartcli) {
  const cliLogger = new Logger('CLI');

  smartcli.addCommand('daemon').subscribe({
    next: async (argvArg: CliArguments) => {
      const subCommand = argvArg._[1];

      switch (subCommand) {
        case 'start':
          try {
            const status = await tspmIpcClient.getDaemonStatus();
            if (status) {
              console.log('TSPM daemon is already running');
              console.log(`  PID: ${status.pid}`);
              console.log(
                `  Uptime: ${Math.floor((status.uptime || 0) / 1000)}s`,
              );
              console.log(`  Processes: ${status.processCount}`);
              return;
            }

            console.log('Starting TSPM daemon manually...');

            // Import spawn to start daemon process
            const { spawn } = await import('child_process');
            const daemonScript = plugins.path.join(
              paths.packageDir,
              'dist_ts',
              'daemon.js',
            );

            // Start daemon as a detached background process
            const daemonProcess = spawn(process.execPath, [daemonScript], {
              detached: true,
              stdio: 'ignore',
              env: {
                ...process.env,
                TSPM_DAEMON_MODE: 'true',
              },
            });

            // Detach the daemon so it continues running after CLI exits
            daemonProcess.unref();

            console.log(`Started daemon with PID: ${daemonProcess.pid}`);

            // Wait for daemon to be ready
            await new Promise((resolve) => setTimeout(resolve, 2000));

            const newStatus = await tspmIpcClient.getDaemonStatus();
            if (newStatus) {
              console.log('✓ TSPM daemon started successfully');
              console.log(`  PID: ${newStatus.pid}`);
              console.log(
                '\nNote: This daemon will run until you stop it or logout.',
              );
              console.log('For automatic startup, use "tspm enable" instead.');
            }

            // Disconnect from the daemon after starting
            await tspmIpcClient.disconnect();
          } catch (error) {
            console.error('Error starting daemon:', error.message);
            process.exit(1);
          }
          break;

        case 'start-service':
          // This is called by systemd - start the daemon directly
          console.log('Starting TSPM daemon for systemd service...');
          const { startDaemon } = await import('../../../classes.daemon.js');
          await startDaemon();
          break;

        case 'stop':
          try {
            console.log('Stopping TSPM daemon...');
            await tspmIpcClient.stopDaemon(true);
            console.log('✓ TSPM daemon stopped successfully');

            // Disconnect from the daemon after stopping
            await tspmIpcClient.disconnect();
          } catch (error) {
            console.error('Error stopping daemon:', error.message);
            process.exit(1);
          }
          break;

        case 'status':
          try {
            const status = await tspmIpcClient.getDaemonStatus();
            if (!status) {
              console.log('TSPM daemon is not running');
              console.log('Use "tspm daemon start" to start it');
              return;
            }

            console.log('TSPM Daemon Status:');
            console.log('─'.repeat(40));
            console.log(`Status:      ${status.status}`);
            console.log(`PID:         ${status.pid}`);
            console.log(
              `Uptime:      ${Math.floor((status.uptime || 0) / 1000)}s`,
            );
            console.log(`Processes:   ${status.processCount}`);
            console.log(
              `Memory:      ${formatMemory(status.memoryUsage || 0)}`,
            );
            console.log(`CPU:         ${status.cpuUsage?.toFixed(1) || 0}s`);

            // Disconnect from daemon after getting status
            await tspmIpcClient.disconnect();
          } catch (error) {
            console.error('Error getting daemon status:', error.message);
            process.exit(1);
          }
          break;

        default:
          console.log('Usage: tspm daemon <command>');
          console.log('\nCommands:');
          console.log('  start   Start the TSPM daemon');
          console.log('  stop    Stop the TSPM daemon');
          console.log('  status  Show daemon status');
          break;
      }
    },
    error: (err) => {
      cliLogger.error(err);
    },
    complete: () => {},
  });
}