// SMCP Continuity Service
// SCB identity unification across realities

import prisma from '@/shared/database/prisma';
import { v4 as uuidv4 } from 'uuid';
import { SovereignContinuityIdentity } from '@/shared/types';


export interface CreateContinuityRequest {
  sovereignBankId: string;
  unifiedIdentity: string;
  classicalIdentity?: string;
  quantumIdentity?: string;
  holographicIdentity?: string;
  parallelIdentity?: Record<string, unknown>[];
  temporalIdentity?: string;
}

export interface ContinuityResult {
  continuityId: string;
  unifiedIdentity: string;
  status: string;
}

export class SmcpContinuityService {
  /**
   * Create or update sovereign continuity identity
   * SCB_identity = unify(all_SCBlayers_across_realities)
   */
  async createContinuityIdentity(
    request: CreateContinuityRequest
  ): Promise<SovereignContinuityIdentity> {
    // Verify sovereign bank exists
    const bank = await prisma.sovereign_banks.findUnique({
      where: { id: request.sovereignBankId },
    });

    if (!bank) {
      throw new Error(`Sovereign bank not found: ${request.sovereignBankId}`);
    }

    // Check if continuity identity already exists
    const existing = await prisma.sovereign_continuity_identities.findFirst({
      where: {
        sovereignBankId: request.sovereignBankId,
        status: 'active',
      },
    });

    if (existing) {
      // Update existing
      const updated = await prisma.sovereign_continuity_identities.update({
        where: { continuityId: existing.continuityId },
        data: {
          unifiedIdentity: request.unifiedIdentity,
          classicalIdentity: request.classicalIdentity || null,
          quantumIdentity: request.quantumIdentity || null,
          holographicIdentity: request.holographicIdentity || null,
          parallelIdentity: request.parallelIdentity || null,
          temporalIdentity: request.temporalIdentity || null,
        },
      });

      return this.mapToContinuityIdentity(updated);
    }

    // Create new
    const continuityId = `SMCP-${uuidv4()}`;
    const continuity = await prisma.sovereign_continuity_identities.create({
      data: {
        continuityId,
        sovereignBankId: request.sovereignBankId,
        unifiedIdentity: request.unifiedIdentity,
        classicalIdentity: request.classicalIdentity || null,
        quantumIdentity: request.quantumIdentity || null,
        holographicIdentity: request.holographicIdentity || null,
        parallelIdentity: request.parallelIdentity || null,
        temporalIdentity: request.temporalIdentity || null,
        status: 'active',
      },
    });

    return this.mapToContinuityIdentity(continuity);
  }

  /**
   * Unify identities across all realities
   */
  async unifyIdentities(sovereignBankId: string): Promise<string> {
    // Get all state mappings for this sovereign bank
    const mappings = await prisma.multiverse_state_mappings.findMany({
      where: {
        continuity: {
          sovereignBankId,
        },
        status: 'active',
      },
      include: {
        sovereign_continuity_identities: true,
      },
    });

    // Extract identities from each reality type
    const identities: Record<string, string> = {};

    for (const mapping of mappings) {
      if (mapping.stateIdentifier) {
        identities[mapping.realityType] = mapping.stateIdentifier;
      }
    }

    // Generate unified identity hash
    const unifiedIdentity = this.generateUnifiedIdentity(identities);

    // Update or create continuity identity
    await this.createContinuityIdentity({
      sovereignBankId,
      unifiedIdentity,
      classicalIdentity: identities.classical,
      quantumIdentity: identities.quantum,
      holographicIdentity: identities.holographic,
      temporalIdentity: identities.temporal,
      parallelIdentity: Object.entries(identities)
        .filter(([key]) => key.startsWith('parallel'))
        .map(([, value]) => ({ identity: value })),
    });

    return unifiedIdentity;
  }

  /**
   * Generate unified identity hash from all reality identities
   */
  private generateUnifiedIdentity(
    identities: Record<string, string>
  ): string {
    // In production, would use cryptographic hash
    const identityString = JSON.stringify(identities);
    const hash = Buffer.from(identityString).toString('base64').substring(0, 32);
    return `UNIFIED-${hash}`;
  }

  /**
   * Get continuity identity for sovereign bank
   */
  async getContinuityIdentity(
    sovereignBankId: string
  ): Promise<SovereignContinuityIdentity | null> {
    const continuity = await prisma.sovereign_continuity_identities.findFirst({
      where: {
        sovereignBankId,
        status: 'active',
      },
      include: {
        multiverse_state_mappings: true,
      },
    });

    if (!continuity) {
      return null;
    }

    return this.mapToContinuityIdentity(continuity);
  }

  /**
   * Map database model to interface
   */
  private mapToContinuityIdentity(continuity: any): SovereignContinuityIdentity {
    return {
      continuityId: continuity.continuityId,
      sovereignBankId: continuity.sovereignBankId,
      unifiedIdentity: continuity.unifiedIdentity,
      classicalIdentity: continuity.classicalIdentity || undefined,
      quantumIdentity: continuity.quantumIdentity || undefined,
      holographicIdentity: continuity.holographicIdentity || undefined,
      parallelIdentity: (continuity.parallelIdentity as Record<string, unknown>[]) || undefined,
      temporalIdentity: continuity.temporalIdentity || undefined,
      status: continuity.status,
    };
  }

  /**
   * Suspend continuity identity
   */
  async suspendContinuity(continuityId: string): Promise<void> {
    await prisma.sovereign_continuity_identities.update({
      where: { continuityId },
      data: { status: 'suspended' },
    });
  }
}

