// DSCN Sync Service
import { Prisma } from '@prisma/client';
// Ledger synchronization with DBIS

import prisma from '@/shared/database/prisma';
import { v4 as uuidv4 } from 'uuid';
import { logger } from '@/infrastructure/monitoring/logger';
import { gssMasterLedgerService } from '@/core/settlement/gss/gss-master-ledger.service';


export interface SyncRequest {
  nodeId: string;
  syncType: 'compliance_result' | 'ledger_state' | 'identity_update';
  syncData: Record<string, unknown>;
}

export class DscnSyncService {
  /**
   * Synchronize data with DBIS
   */
  async syncToDbis(request: SyncRequest): Promise<{ syncId: string; synced: boolean; dbisLedgerHash?: string }> {
    const syncId = `DSCN-SYNC-${uuidv4()}`;

    try {
      let dbisLedgerHash: string | undefined;

      switch (request.syncType) {
        case 'compliance_result':
          // Sync compliance result
          await this.syncComplianceResult(request.nodeId, request.syncData);
          break;

        case 'ledger_state':
          // Sync ledger state
          dbisLedgerHash = await this.syncLedgerState(request.nodeId, request.syncData);
          break;

        case 'identity_update':
          // Sync identity update
          await this.syncIdentityUpdate(request.nodeId, request.syncData);
          break;
      }

      // Create sync record
      await prisma.dscn_sync_records.create({
        data: {
          id: uuidv4(),
          syncId,
          nodeId: request.nodeId,
          syncType: request.syncType,
          syncData: request.syncData as Prisma.InputJsonValue,
          dbisLedgerHash: dbisLedgerHash || null,
          syncStatus: 'synced',
          syncedAt: new Date(),
          createdAt: new Date(),
          updatedAt: new Date(),
        },
      });

      // Update compliance results as synced
      if (request.syncType === 'compliance_result') {
        await prisma.dscn_compliance_results.updateMany({
          where: {
            nodeId: request.nodeId,
            syncedToDbis: false,
          },
          data: {
            syncedToDbis: true,
            syncedAt: new Date(),
          },
        });
      }

      logger.info('DSCN Sync: Synchronized with DBIS', {
        syncId,
        nodeId: request.nodeId,
        syncType: request.syncType,
        dbisLedgerHash,
      });

      return {
        syncId,
        synced: true,
        dbisLedgerHash,
      };
    } catch (error) {
      logger.error('DSCN Sync: Synchronization failed', { error, request });

      await prisma.dscn_sync_records.create({
        data: {
          id: uuidv4(),
          syncId,
          nodeId: request.nodeId,
          syncType: request.syncType,
          syncData: request.syncData as Prisma.InputJsonValue,
          syncStatus: 'failed',
          createdAt: new Date(),
          updatedAt: new Date(),
        },
      });

      return {
        syncId,
        synced: false,
      };
    }
  }

  /**
   * Sync compliance result
   */
  private async syncComplianceResult(nodeId: string, syncData: Record<string, unknown>): Promise<void> {
    // In production, would update DBIS compliance records
    logger.info('DSCN Sync: Compliance result synced', { nodeId, syncData });
  }

  /**
   * Sync ledger state
   */
  private async syncLedgerState(nodeId: string, syncData: Record<string, unknown>): Promise<string> {
    // Get node
    const node = await prisma.dscn_nodes.findUnique({
      where: { nodeId },
    });

    if (!node || !node.sovereignBankId) {
      throw new Error('Node or sovereign bank not found');
    }

    // Post to DBIS Master Ledger if needed
    // In production, would sync actual ledger state
    // For now, return placeholder hash
    return `DBIS-HASH-${Date.now()}`;
  }

  /**
   * Sync identity update
   */
  private async syncIdentityUpdate(nodeId: string, syncData: Record<string, unknown>): Promise<void> {
    // In production, would update GBIG
    logger.info('DSCN Sync: Identity update synced', { nodeId, syncData });
  }
}

export const dscnSyncService = new DscnSyncService();

