// Cross-Metaverse FX Service
// Enhanced FX with QMU, HMU support for cross-metaverse transactions
// Supplement B: MetaverseDubai Integration Framework

import prisma from '@/shared/database/prisma';
import { Decimal } from '@prisma/client/runtime/library';
import { v4 as uuidv4 } from 'uuid';
import { logger } from '@/infrastructure/monitoring/logger';
import { metaverseFxService } from '../metaverse-fx.service';


export interface CrossMetaverseFxRequest {
  sourceMetaverseNodeId: string;
  targetMetaverseNodeId: string;
  sourceAmount: string;
  sourceCurrency: string;
  targetCurrency: string;
  conversionMethod: 'ssu' | 'qmu' | 'hmu' | 'direct';
  realityType?: 'classical' | 'quantum' | 'simulated' | 'holographic';
}

export interface CrossMetaverseFxResult {
  fxTransactionId: string;
  targetAmount: string;
  exchangeRate: number;
  conversionMethod: string;
  status: string;
}

export class CrossMetaverseFxService {
  /**
   * Execute cross-metaverse FX with QMU, HMU support
   * Supports conversion between metaverses using SSU, QMU, HMU, or direct conversion
   */
  async executeCrossMetaverseFx(
    request: CrossMetaverseFxRequest
  ): Promise<CrossMetaverseFxResult> {
    logger.info('Cross-Metaverse FX: Executing cross-metaverse FX', {
      request,
    });

    // Step 1: Calculate exchange rate based on conversion method
    const exchangeRate = await this.calculateExchangeRate(
      request.sourceCurrency,
      request.targetCurrency,
      request.conversionMethod,
      request.realityType
    );

    // Step 2: Calculate target amount
    const targetAmount = (
      parseFloat(request.sourceAmount) * exchangeRate
    ).toFixed(8);

    // Step 3: Execute FX transaction
    const fxResult = await metaverseFxService.executeInterMetaverseFx({
      sourceMetaverseNodeId: request.sourceMetaverseNodeId,
      targetMetaverseNodeId: request.targetMetaverseNodeId,
      sourceAmount: request.sourceAmount,
      targetAmount,
      sourceCurrency: request.sourceCurrency,
      targetCurrency: request.targetCurrency,
      conversionMethod: request.conversionMethod,
    });

    // Step 4: Update FX transaction with reality type
    if (request.realityType) {
      await prisma.metaverse_fx_transactions.update({
        where: { fxTransactionId: fxResult.fxTransactionId },
        data: { realityType: request.realityType },
      });
    }

    logger.info('Cross-Metaverse FX: Cross-metaverse FX completed', {
      fxTransactionId: fxResult.fxTransactionId,
      conversionMethod: request.conversionMethod,
    });

    return {
      fxTransactionId: fxResult.fxTransactionId,
      targetAmount,
      exchangeRate,
      conversionMethod: request.conversionMethod,
      status: fxResult.status,
    };
  }

  /**
   * Calculate exchange rate based on conversion method
   */
  private async calculateExchangeRate(
    sourceCurrency: string,
    targetCurrency: string,
    conversionMethod: string,
    realityType?: string
  ): Promise<number> {
    // Base exchange rate (would be fetched from FX service in production)
    let baseRate = 1.0;

    // Apply conversion method adjustments
    switch (conversionMethod) {
      case 'ssu':
        // SSU conversion: stable cross-border settlement asset
        baseRate = 1.0; // SSU is designed to be stable
        break;
      case 'qmu':
        // QMU (Quantum Monetary Unit): quantum reality conversion
        baseRate = 1.0; // Quantum conversion rate
        if (realityType === 'quantum') {
          baseRate = 1.0; // 1:1 in quantum reality
        }
        break;
      case 'hmu':
        // HMU (Holographic Monetary Unit): holographic reality conversion
        baseRate = 1.0; // Holographic conversion rate
        if (realityType === 'holographic') {
          baseRate = 1.0; // 1:1 in holographic reality
        }
        break;
      case 'direct':
        // Direct conversion: standard FX rate
        // In production, this would query FX service
        baseRate = 1.0;
        break;
    }

    // Apply reality type adjustments
    if (realityType) {
      const realityAdjustments: Record<string, number> = {
        classical: 1.0,
        quantum: 1.0,
        simulated: 0.95, // Slight discount for simulated reality
        holographic: 1.05, // Slight premium for holographic reality
      };
      baseRate *= realityAdjustments[realityType] || 1.0;
    }

    return baseRate;
  }

  /**
   * Get cross-metaverse FX transaction by ID
   */
  async getCrossMetaverseFxTransaction(fxTransactionId: string) {
    return await prisma.metaverse_fx_transactions.findUnique({
      where: { fxTransactionId },
      include: {
        sourceNode: true,
        targetNode: true,
      },
    });
  }
}

export const crossMetaverseFxService = new CrossMetaverseFxService();

