// DCDC Operational Defense Unit (ODU)
// Real-time attack response, penetration countermeasures, automated node quarantine

import prisma from '@/shared/database/prisma';
import { Decimal } from '@prisma/client/runtime/library';
import { v4 as uuidv4 } from 'uuid';


export interface AttackResponse {
  responseId: string;
  incidentId: string;
  action: string;
  status: string;
  executedAt: Date;
}

export class DcdcOperationalDefenseService {
  /**
   * Initialize or get ODU division
   */
  async initializeODU() {
    const existing = await prisma.dcdc_divisions.findFirst({
      where: { divisionType: 'ODU' },
    });

    if (existing) {
      return existing;
    }

    return await prisma.dcdc_divisions.create({
      data: {
        divisionId: `ODU-${uuidv4()}`,
        divisionType: 'ODU',
        divisionName: 'Operational Defense Unit',
        description: 'Real-time attack response, penetration countermeasures, automated node quarantine',
        status: 'active',
      },
    });
  }

  /**
   * Respond to real-time attack
   */
  async respondToAttack(
    incidentId: string,
    attackType: string,
    targetNodeId?: string,
    targetBankId?: string
  ): Promise<AttackResponse> {
    const odu = await this.initializeODU();

    // Create defense layer action for containment
    const action = await prisma.defense_layer_actions.create({
      data: {
        actionId: `ACTION-${uuidv4()}`,
        divisionId: odu.id,
        incidentId,
        layer: 'B', // Containment layer
        actionType: 'route_isolation',
        targetNodeId,
        targetBankId,
        description: `Real-time response to ${attackType} attack`,
        actionStatus: 'executed',
        executedAt: new Date(),
      },
    });

    // If node is specified, quarantine it
    if (targetNodeId) {
      await this.quarantineNode(targetNodeId, `Attack response: ${attackType}`, 'automatic');
    }

    return {
      responseId: action.actionId,
      incidentId,
      action: action.actionType,
      status: action.actionStatus,
      executedAt: action.executedAt || new Date(),
    };
  }

  /**
   * Quarantine node automatically
   */
  async quarantineNode(
    nodeId: string,
    reason: string,
    quarantineType: string = 'automatic',
    sovereignBankId?: string
  ) {
    // Check if already quarantined
    const existing = await prisma.node_quarantines.findFirst({
      where: {
        nodeId,
        status: 'quarantined',
      },
    });

    if (existing) {
      return existing;
    }

    return await prisma.node_quarantines.create({
      data: {
        quarantineId: `QUARANTINE-${uuidv4()}`,
        nodeId,
        sovereignBankId,
        quarantineReason: reason,
        quarantineType,
        status: 'quarantined',
        quarantinedAt: new Date(),
      },
    });
  }

  /**
   * Release node from quarantine
   */
  async releaseNode(quarantineId: string) {
    return await prisma.node_quarantines.update({
      where: { quarantineId },
      data: {
        status: 'released',
        releasedAt: new Date(),
      },
    });
  }

  /**
   * Execute penetration countermeasures
   */
  async executeCountermeasures(incidentId: string, countermeasureType: string) {
    const odu = await this.initializeODU();

    return await prisma.defense_layer_actions.create({
      data: {
        actionId: `ACTION-${uuidv4()}`,
        divisionId: odu.id,
        incidentId,
        layer: 'C', // Neutralization layer
        actionType: countermeasureType,
        description: `Penetration countermeasure: ${countermeasureType}`,
        actionStatus: 'executed',
        executedAt: new Date(),
      },
    });
  }

  /**
   * Get quarantined nodes
   */
  async getQuarantinedNodes() {
    return await prisma.node_quarantines.findMany({
      where: {
        status: 'quarantined',
      },
    });
  }

  /**
   * Get active responses
   */
  async getActiveResponses() {
    return await prisma.defense_layer_actions.findMany({
      where: {
        actionStatus: 'executed',
        layer: {
          in: ['B', 'C'], // Containment and Neutralization
        },
      },
      orderBy: {
        executedAt: 'desc',
      },
      take: 100,
    });
  }
}

export const dcdcOperationalDefenseService = new DcdcOperationalDefenseService();

