// DBIS Unified Holographic Economic Model - Correction Service
// Non-physical deviation correction

import { Prisma } from '@prisma/client';
import prisma from '@/shared/database/prisma';
import { v4 as uuidv4 } from 'uuid';
import { Decimal } from '@prisma/client/runtime/library';
import { uhemEncodingService } from './uhem-encoding.service';


export type DeviationType = 'non_physical' | 'inconsistency' | 'divergence';
export type CorrectionMethod = 'reverse_projection' | 'prime_ledger_alignment';

export interface CreateCorrectionRequest {
  stateId: string;
  deviationType: DeviationType;
  deviationMagnitude: number;
  correctionMethod: CorrectionMethod;
  correctionDetails: Record<string, unknown>;
}

export class UhemCorrectionService {
  /**
   * Create deviation correction
   */
  async createCorrection(request: CreateCorrectionRequest) {
    // Verify state exists
    const state = await uhemEncodingService.getState(request.stateId);
    if (!state) {
      throw new Error(`State not found: ${request.stateId}`);
    }

    const correctionId = `DC-${uuidv4()}`;

    const correction = await prisma.deviationCorrection.create({
      data: {
        correctionId,
        stateId: request.stateId,
        deviationType: request.deviationType,
        deviationMagnitude: new Decimal(request.deviationMagnitude),
        correctionApplied: request.correctionDetails as Prisma.InputJsonValue,
        correctionMethod: request.correctionMethod,
        status: 'pending',
      },
    });

    return correction;
  }

  /**
   * Apply correction
   */
  async applyCorrection(correctionId: string) {
    const correction = await prisma.deviationCorrection.findUnique({
      where: { correctionId },
      include: {
        state: true,
      },
    });

    if (!correction) {
      throw new Error(`Correction not found: ${correctionId}`);
    }

    if (correction.status !== 'pending') {
      throw new Error(`Correction already ${correction.status}`);
    }

    // Apply correction based on method
    switch (correction.correctionMethod) {
      case 'reverse_projection':
        await this.applyReverseProjection(correction);
        break;
      case 'prime_ledger_alignment':
        await this.applyPrimeLedgerAlignment(correction);
        break;
    }

    // Update correction status
    await prisma.deviationCorrection.update({
      where: { correctionId },
      data: {
        status: 'applied',
        correctedAt: new Date(),
      },
    });

    return correction;
  }

  /**
   * Apply reverse projection correction
   */
  private async applyReverseProjection(correction: any) {
    // In production, this would perform reverse projection to correct deviations
    // For now, just mark as applied
  }

  /**
   * Apply prime ledger alignment correction
   */
  private async applyPrimeLedgerAlignment(correction: any) {
    // In production, this would align with Prime Ledger to correct deviations
    // For now, just mark as applied
  }

  /**
   * Verify correction
   */
  async verifyCorrection(correctionId: string) {
    const correction = await prisma.deviationCorrection.findUnique({
      where: { correctionId },
    });

    if (!correction) {
      throw new Error(`Correction not found: ${correctionId}`);
    }

    if (correction.status !== 'applied') {
      throw new Error(`Correction not yet applied: ${correction.status}`);
    }

    // In production, this would verify the correction was successful
    await prisma.deviationCorrection.update({
      where: { correctionId },
      data: {
        status: 'verified',
      },
    });

    return correction;
  }

  /**
   * Get correction by ID
   */
  async getCorrection(correctionId: string) {
    return await prisma.deviationCorrection.findUnique({
      where: { correctionId },
      include: {
        state: true,
      },
    });
  }

  /**
   * Get corrections for a state
   */
  async getCorrectionsForState(stateId: string) {
    return await prisma.deviationCorrection.findMany({
      where: { stateId },
      orderBy: { createdAt: 'desc' },
    });
  }

  /**
   * Get pending corrections
   */
  async getPendingCorrections() {
    return await prisma.deviationCorrection.findMany({
      where: { status: 'pending' },
      orderBy: { createdAt: 'asc' },
    });
  }
}

export const uhemCorrectionService = new UhemCorrectionService();

