// Metaverse FX Service
// Inter-metaverse FX using SSU/QMU

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';


export interface MetaverseFxRequest {
  sourceMetaverseNodeId: string;
  targetMetaverseNodeId: string;
  amount: string;
  sourceCurrency: string;
  targetCurrency: string;
  useSsu?: boolean; // Use SSU for conversion
  useQmu?: boolean; // Use QMU for conversion
}

export interface MetaverseFxResult {
  fxTransactionId: string;
  sourceAmount: Decimal;
  targetAmount: Decimal;
  exchangeRate: Decimal;
  conversionMethod: 'ssu' | 'qmu' | 'direct';
}

export class MetaverseFxService {
  /**
   * Execute inter-metaverse FX using SSU/QMU
   */
  async executeInterMetaverseFx(
    request: MetaverseFxRequest
  ): Promise<MetaverseFxResult> {
    logger.info('Metaverse: Executing inter-metaverse FX', { request });

    // Step 1: Verify metaverse nodes exist
    const sourceNode = await prisma.metaverse_nodes.findUnique({
      where: { nodeId: request.sourceMetaverseNodeId },
    });

    const targetNode = await prisma.metaverse_nodes.findUnique({
      where: { nodeId: request.targetMetaverseNodeId },
    });

    if (!sourceNode || !targetNode) {
      throw new Error('Metaverse node not found');
    }

    // Step 2: Determine conversion method
    let conversionMethod: 'ssu' | 'qmu' | 'direct' = 'direct';
    let exchangeRate: Decimal;

    if (request.useSsu) {
      conversionMethod = 'ssu';
      exchangeRate = await this.calculateSsuRate(
        request.sourceCurrency,
        request.targetCurrency
      );
    } else if (request.useQmu) {
      conversionMethod = 'qmu';
      exchangeRate = await this.calculateQmuRate(
        request.sourceCurrency,
        request.targetCurrency
      );
    } else {
      // Direct conversion
      exchangeRate = await this.calculateDirectRate(
        request.sourceCurrency,
        request.targetCurrency
      );
    }

    // Step 3: Calculate target amount
    const sourceAmount = new Decimal(request.amount);
    const targetAmount = sourceAmount.times(exchangeRate);

    // Step 4: Create FX transaction record
    const fxTransactionId = `METAVERSE-FX-${uuidv4()}`;

    await prisma.metaverse_fx_transactions.create({
      data: {
        id: uuidv4(),
        fxTransactionId,
        sourceMetaverseNodeId: request.sourceMetaverseNodeId,
        targetMetaverseNodeId: request.targetMetaverseNodeId,
        sourceAmount,
        targetAmount,
        sourceCurrency: request.sourceCurrency,
        targetCurrency: request.targetCurrency,
        exchangeRate,
        conversionMethod,
        status: 'completed',
        createdAt: new Date(),
        updatedAt: new Date(),
      },
    });

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

    return {
      fxTransactionId,
      sourceAmount,
      targetAmount,
      exchangeRate,
      conversionMethod,
    };
  }

  /**
   * Calculate SSU rate
   */
  private async calculateSsuRate(
    sourceCurrency: string,
    targetCurrency: string
  ): Promise<Decimal> {
    // In production, would fetch SSU rates
    // For now, use default rate
    return new Decimal(1); // Placeholder
  }

  /**
   * Calculate QMU rate
   */
  private async calculateQmuRate(
    sourceCurrency: string,
    targetCurrency: string
  ): Promise<Decimal> {
    // In production, would fetch QMU rates
    // For now, use default rate
    return new Decimal(1); // Placeholder
  }

  /**
   * Calculate direct rate
   */
  private async calculateDirectRate(
    sourceCurrency: string,
    targetCurrency: string
  ): Promise<Decimal> {
    // In production, would fetch FX rates
    // For now, use default rate
    return new Decimal(1); // Placeholder
  }

  /**
   * Get FX transaction by ID
   */
  async getFxTransaction(fxTransactionId: string) {
    return await prisma.metaverse_fx_transactions.findUnique({
      where: { fxTransactionId },
    });
  }

  /**
   * Get FX transactions for metaverse node
   */
  async getFxTransactionsForNode(metaverseNodeId: string) {
    return await prisma.metaverse_fx_transactions.findMany({
      where: {
        OR: [
          { sourceMetaverseNodeId: metaverseNodeId },
          { targetMetaverseNodeId: metaverseNodeId },
        ],
      },
      orderBy: { createdAt: 'desc' },
    });
  }
}

export const metaverseFxService = new MetaverseFxService();

