// ISRM Quantum Reserve Service
// Quantum superposition reserve management

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


export interface CreateQuantumStateRequest {
  reserveId: string;
  quantumState: Record<string, unknown>;
  probabilityAmplitude: string;
  entanglementHash?: string;
}

export interface QuantumStateResult {
  stateId: string;
  probabilityAmplitude: string;
  coherence?: string;
}

export class IsrmQuantumReserveService {
  /**
   * Create a quantum reserve state
   */
  async createQuantumState(
    request: CreateQuantumStateRequest
  ): Promise<QuantumStateResult> {
    const reserve = await prisma.infinite_state_reserves.findUnique({
      where: { reserveId: request.reserveId },
    });

    if (!reserve) {
      throw new Error(`Reserve not found: ${request.reserveId}`);
    }

    const stateId = `ISRM-QS-${uuidv4()}`;

    // Calculate coherence (simplified)
    const coherence = await this.calculateCoherence(
      request.probabilityAmplitude,
      request.entanglementHash
    );

    const state = await prisma.quantum_reserve_states.create({
      data: {
        stateId,
        reserveId: request.reserveId,
        quantumState: request.quantumState,
        probabilityAmplitude: new Decimal(request.probabilityAmplitude),
        entanglementHash: request.entanglementHash || null,
        coherence: coherence ? new Decimal(coherence) : null,
        measuredAt: new Date(),
      },
    });

    // Update quantum reserve component
    await this.updateQuantumReserve(request.reserveId);

    return {
      stateId: state.stateId,
      probabilityAmplitude: state.probabilityAmplitude.toString(),
      coherence: state.coherence?.toString(),
    };
  }

  /**
   * Calculate quantum coherence
   */
  private async calculateCoherence(
    probabilityAmplitude: string,
    entanglementHash?: string
  ): Promise<string | null> {
    // Simplified coherence calculation
    // In production, would use actual quantum coherence metrics
    const amplitude = new Decimal(probabilityAmplitude);
    let coherence = amplitude.abs();

    // Higher coherence if entangled
    if (entanglementHash) {
      coherence = coherence.mul(new Decimal(1.1));
    }

    // Normalize to 0-1 range
    coherence = coherence.min(new Decimal(1));

    return coherence.toString();
  }

  /**
   * Update quantum reserve component from quantum states
   */
  private async updateQuantumReserve(reserveId: string): Promise<void> {
    const states = await prisma.quantum_reserve_states.findMany({
      where: { reserveId },
    });

    if (states.length === 0) {
      return;
    }

    // Calculate total quantum reserve as weighted sum of states
    // Simplified: sum of probability amplitudes
    const totalQuantumReserve = states.reduce((sum, state) => {
      return sum.plus(state.probabilityAmplitude);
    }, new Decimal(0));

    // Update reserve
    await prisma.infinite_state_reserves.update({
      where: { reserveId },
      data: {
        quantumReserve: totalQuantumReserve,
        calculatedAt: new Date(),
      },
    });
  }

  /**
   * Get quantum states for a reserve
   */
  async getQuantumStates(reserveId: string): Promise<QuantumStateResult[]> {
    const states = await prisma.quantum_reserve_states.findMany({
      where: { reserveId },
      orderBy: { measuredAt: 'desc' },
    });

    return states.map((state) => ({
      stateId: state.stateId,
      probabilityAmplitude: state.probabilityAmplitude.toString(),
      coherence: state.coherence?.toString(),
    }));
  }

  /**
   * Measure quantum state (collapse superposition)
   */
  async measureQuantumState(stateId: string): Promise<{
    measuredValue: string;
    collapsed: boolean;
  }> {
    const state = await prisma.quantum_reserve_states.findUnique({
      where: { stateId },
    });

    if (!state) {
      throw new Error(`Quantum state not found: ${stateId}`);
    }

    // Measurement collapses quantum state to classical value
    // Use probability amplitude as measured value (simplified)
    const measuredValue = state.probabilityAmplitude;

    // Update state with measurement
    await prisma.quantum_reserve_states.update({
      where: { stateId },
      data: {
        measuredAt: new Date(),
      },
    });

    return {
      measuredValue: measuredValue.toString(),
      collapsed: true,
    };
  }
}

