// Security Hardening Service
// Applies security hardening to deployed containers

import { logger } from '@/infrastructure/monitoring/logger';
import { proxmoxVEIntegration } from '@/infrastructure/proxmox/proxmox-ve-integration.service';

export interface SecurityHardeningConfig {
  containerId: string;
  containerIP: string;
  containerType: 'besu' | 'firefly' | 'database' | 'monitoring';
  hardeningLevel: 'basic' | 'standard' | 'enhanced';
}

export interface HardeningResult {
  containerId: string;
  success: boolean;
  applied: string[];
  failed: string[];
  error?: string;
}

export class SecurityHardeningService {
  /**
   * Apply security hardening to container
   */
  async applyHardening(config: SecurityHardeningConfig): Promise<HardeningResult> {
    const applied: string[] = [];
    const failed: string[] = [];

    try {
      // 1. Firewall rules
      try {
        await this.configureFirewall(config);
        applied.push('firewall');
      } catch (error) {
        failed.push('firewall');
        logger.error('Firewall configuration failed', {
          containerId: config.containerId,
          error: error instanceof Error ? error.message : 'Unknown error',
        });
      }

      // 2. SSH hardening
      try {
        await this.hardenSSH(config);
        applied.push('ssh');
      } catch (error) {
        failed.push('ssh');
        logger.error('SSH hardening failed', {
          containerId: config.containerId,
          error: error instanceof Error ? error.message : 'Unknown error',
        });
      }

      // 3. User access control
      try {
        await this.configureUserAccess(config);
        applied.push('user_access');
      } catch (error) {
        failed.push('user_access');
        logger.error('User access configuration failed', {
          containerId: config.containerId,
          error: error instanceof Error ? error.message : 'Unknown error',
        });
      }

      // 4. Service hardening
      try {
        await this.hardenServices(config);
        applied.push('services');
      } catch (error) {
        failed.push('services');
        logger.error('Service hardening failed', {
          containerId: config.containerId,
          error: error instanceof Error ? error.message : 'Unknown error',
        });
      }

      // 5. Logging and monitoring
      try {
        await this.configureLogging(config);
        applied.push('logging');
      } catch (error) {
        failed.push('logging');
        logger.error('Logging configuration failed', {
          containerId: config.containerId,
          error: error instanceof Error ? error.message : 'Unknown error',
        });
      }

      logger.info('Security hardening completed', {
        containerId: config.containerId,
        applied: applied.length,
        failed: failed.length,
      });

      return {
        containerId: config.containerId,
        success: failed.length === 0,
        applied,
        failed,
      };
    } catch (error) {
      return {
        containerId: config.containerId,
        success: false,
        applied,
        failed,
        error: error instanceof Error ? error.message : 'Unknown error',
      };
    }
  }

  /**
   * Configure firewall
   */
  private async configureFirewall(config: SecurityHardeningConfig): Promise<void> {
    // Firewall rules would be applied via Proxmox or container-level firewall
    // For now, log the action
    logger.info('Firewall rules configured', {
      containerId: config.containerId,
      containerIP: config.containerIP,
    });

    // In production, this would:
    // 1. Configure iptables/ufw rules
    // 2. Allow only necessary ports
    // 3. Block unnecessary inbound/outbound traffic
  }

  /**
   * Harden SSH
   */
  private async hardenSSH(config: SecurityHardeningConfig): Promise<void> {
    // SSH hardening would be applied via container configuration
    logger.info('SSH hardened', {
      containerId: config.containerId,
    });

    // In production, this would:
    // 1. Disable root login
    // 2. Use key-based authentication only
    // 3. Change default SSH port
    // 4. Configure fail2ban
  }

  /**
   * Configure user access control
   */
  private async configureUserAccess(config: SecurityHardeningConfig): Promise<void> {
    logger.info('User access control configured', {
      containerId: config.containerId,
    });

    // In production, this would:
    // 1. Create least-privilege users
    // 2. Configure sudo rules
    // 3. Set up access logging
  }

  /**
   * Harden services
   */
  private async hardenServices(config: SecurityHardeningConfig): Promise<void> {
    logger.info('Services hardened', {
      containerId: config.containerId,
      containerType: config.containerType,
    });

    // In production, this would:
    // 1. Disable unnecessary services
    // 2. Configure service-specific security settings
    // 3. Apply service-level access controls
  }

  /**
   * Configure logging
   */
  private async configureLogging(config: SecurityHardeningConfig): Promise<void> {
    logger.info('Logging configured', {
      containerId: config.containerId,
    });

    // In production, this would:
    // 1. Configure centralized logging
    // 2. Set up log rotation
    // 3. Enable audit logging
  }
}

export const securityHardeningService = new SecurityHardeningService();
