// DBIS Temporal-Multiversal FX Parity Law - Parity Calculation
// Prevents destabilization across time-separated markets, parallel FX structures, quantum-currency pairs, and synthetic temporal units

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


export interface FxParityCalculationRequest {
  currencyPair: string;
  spotRate: number;
  temporalSmoothing: number;
  parallelArbitrage: number;
  ssuAnchor: number;
  gqlResonance: number;
}

export interface FxParityResult {
  parityId: string;
  parity: number;
  spotRate: number;
  divergence: number;
  requiresCorrection: boolean;
}

export class TmfplParityService {
  /**
   * Calculate FX parity
   * FX_parity = spot_rate + temporal_smoothing - parallel_arbitrage + SSU_anchor + GQL_resonance
   */
  async calculateFxParity(request: FxParityCalculationRequest): Promise<FxParityResult> {
    const parityId = `TMFPL-${uuidv4()}`;

    const spotRate = new Decimal(request.spotRate);
    const temporalSmoothing = new Decimal(request.temporalSmoothing);
    const parallelArbitrage = new Decimal(request.parallelArbitrage);
    const ssuAnchor = new Decimal(request.ssuAnchor);
    const gqlResonance = new Decimal(request.gqlResonance);

    // Calculate FX parity
    const parity = spotRate
      .plus(temporalSmoothing)
      .minus(parallelArbitrage)
      .plus(ssuAnchor)
      .plus(gqlResonance);

    // Calculate divergence from spot rate
    const divergence = parity.minus(spotRate);

    // Check if correction is required (divergence > threshold)
    const divergenceThreshold = new Decimal(0.05); // 5% threshold
    const requiresCorrection = divergence.abs().greaterThan(divergenceThreshold);

    // Store parity calculation
    await prisma.temporalFxParity.create({
      data: {
        parityId,
        currencyPair: request.currencyPair,
        spotRate: spotRate,
        temporalSmoothing: temporalSmoothing,
        parallelArbitrage: parallelArbitrage,
        ssuAnchor: ssuAnchor,
        gqlResonance: gqlResonance,
        calculatedParity: parity,
        divergence: divergence,
        requiresCorrection,
        status: 'calculated',
      },
    });

    return {
      parityId,
      parity: parity.toNumber(),
      spotRate: spotRate.toNumber(),
      divergence: divergence.toNumber(),
      requiresCorrection,
    };
  }

  /**
   * Get parity by ID
   */
  async getParity(parityId: string) {
    return await prisma.temporalFxParity.findUnique({
      where: { parityId },
      include: {
        corrections: {
          orderBy: { createdAt: 'desc' },
        },
        divergences: {
          orderBy: { createdAt: 'desc' },
        },
      },
    });
  }

  /**
   * Get latest parity for currency pair
   */
  async getLatestParity(currencyPair: string) {
    return await prisma.temporalFxParity.findFirst({
      where: {
        currencyPair,
        status: 'calculated',
      },
      orderBy: { createdAt: 'desc' },
    });
  }

  /**
   * Get all parities requiring correction
   */
  async getParitiesRequiringCorrection() {
    return await prisma.temporalFxParity.findMany({
      where: {
        requiresCorrection: true,
        status: 'calculated',
      },
      orderBy: { createdAt: 'desc' },
    });
  }
}

export const tmfplParityService = new TmfplParityService();

