// DBIS Volume XIV: Trans-Causal Monetary Protocol (TCMP)
// Governs financial interactions that influence past and future states simultaneously

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


export interface TransCausalTransactionRequest {
  presentState: Record<string, unknown>;
  futureProjection: Record<string, unknown>;
  pastAlignment: Record<string, unknown>;
  integrityWeight?: number;
  coherenceThreshold?: number;
}

export interface CausalCoherenceResult {
  coherent: boolean;
  coherenceScore: number;
  threshold: number;
  status: string;
  deferredReason?: string;
}

export class TcmpService {
  /**
   * Create a trans-causal transaction (TCX)
   */
  async createTransCausalTransaction(
    request: TransCausalTransactionRequest
  ): Promise<{
    tcxId: string;
    causalHash: string;
    coherence: CausalCoherenceResult;
  }> {
    const tcxId = `TCX-${uuidv4()}`;
    const integrityWeight = new Decimal(
      request.integrityWeight ?? 1.0
    );
    const coherenceThreshold = new Decimal(
      request.coherenceThreshold ?? 0.95
    );

    // Calculate causal hash: HASH(S0 + S+ + S-)
    const stateString =
      JSON.stringify(request.presentState) +
      JSON.stringify(request.futureProjection) +
      JSON.stringify(request.pastAlignment);
    const causalHash = createHash('sha3-256')
      .update(stateString)
      .digest('hex');

    // Calculate causal coherence: f(S0, S+, S-)
    const coherence = await this.calculateCausalCoherence(
      request.presentState,
      request.futureProjection,
      request.pastAlignment,
      coherenceThreshold
    );

    // Create transaction
    const tcx = await prisma.transCausalTransaction.create({
      data: {
        tcxId,
        presentState: request.presentState as unknown as object,
        futureProjection: request.futureProjection as unknown as object,
        pastAlignment: request.pastAlignment as unknown as object,
        causalHash,
        integrityWeight,
        causalCoherence: new Decimal(coherence.coherenceScore),
        coherenceThreshold,
        status: coherence.coherent ? 'coherent' : 'deferred',
        deferredReason: coherence.deferredReason,
      },
    });

    // If coherence fails, apply causal-resolution mapping
    if (!coherence.coherent) {
      await this.applyCausalResolution(tcx.id, {
        presentState: request.presentState,
        futureProjection: request.futureProjection,
        pastAlignment: request.pastAlignment,
      });
    }

    return {
      tcxId: tcx.tcxId,
      causalHash: tcx.causalHash,
      coherence,
    };
  }

  /**
   * Calculate causal coherence: f(S0, S+, S-)
   */
  async calculateCausalCoherence(
    presentState: Record<string, unknown>,
    futureProjection: Record<string, unknown>,
    pastAlignment: Record<string, unknown>,
    threshold: Decimal
  ): Promise<CausalCoherenceResult> {
    // Simplified coherence calculation
    // In production, this would use sophisticated temporal logic

    // Check temporal consistency
    const temporalConsistency = this.checkTemporalConsistency(
      presentState,
      futureProjection,
      pastAlignment
    );

    // Check state alignment
    const stateAlignment = this.checkStateAlignment(
      presentState,
      futureProjection,
      pastAlignment
    );

    // Combined coherence score
    const coherenceScore =
      temporalConsistency * 0.5 + stateAlignment * 0.5;

    const coherent = coherenceScore >= threshold.toNumber();

    return {
      coherent,
      coherenceScore,
      threshold: threshold.toNumber(),
      status: coherent ? 'coherent' : 'deferred',
      deferredReason: coherent
        ? undefined
        : `Coherence score ${coherenceScore.toFixed(4)} below threshold ${threshold.toNumber()}`,
    };
  }

  /**
   * Check temporal consistency between states
   */
  private checkTemporalConsistency(
    present: Record<string, unknown>,
    future: Record<string, unknown>,
    past: Record<string, unknown>
  ): number {
    // Simplified: check if temporal transitions are logical
    // In production, this would use temporal logic engines

    let consistency = 1.0;

    // Check if future projection is consistent with present
    const futureConsistency = this.compareStates(present, future, 'forward');
    consistency *= futureConsistency;

    // Check if past alignment is consistent with present
    const pastConsistency = this.compareStates(past, present, 'backward');
    consistency *= pastConsistency;

    return consistency;
  }

  /**
   * Check state alignment
   */
  private checkStateAlignment(
    present: Record<string, unknown>,
    future: Record<string, unknown>,
    past: Record<string, unknown>
  ): number {
    // Check if states align across temporal dimensions
    const alignmentScore =
      this.calculateAlignmentScore(present, future) *
      this.calculateAlignmentScore(past, present);

    return Math.min(1.0, alignmentScore);
  }

  /**
   * Compare two states for consistency
   */
  private compareStates(
    state1: Record<string, unknown>,
    state2: Record<string, unknown>,
    direction: 'forward' | 'backward'
  ): number {
    // Simplified state comparison
    // In production, this would use sophisticated state matching

    const keys1 = Object.keys(state1);
    const keys2 = Object.keys(state2);

    if (keys1.length === 0 || keys2.length === 0) {
      return 0.5; // Neutral if empty
    }

    const commonKeys = keys1.filter((k) => keys2.includes(k));
    if (commonKeys.length === 0) {
      return 0.3; // Low consistency if no common keys
    }

    // Check value consistency
    let consistent = 0;
    for (const key of commonKeys) {
      const val1 = state1[key];
      const val2 = state2[key];

      if (this.valuesConsistent(val1, val2, direction)) {
        consistent++;
      }
    }

    return consistent / commonKeys.length;
  }

  /**
   * Check if two values are temporally consistent
   */
  private valuesConsistent(
    val1: unknown,
    val2: unknown,
    direction: 'forward' | 'backward'
  ): boolean {
    // Simplified consistency check
    if (val1 === val2) {
      return true;
    }

    // For numeric values, check if change is reasonable
    if (typeof val1 === 'number' && typeof val2 === 'number') {
      const change = Math.abs(val2 - val1) / Math.max(Math.abs(val1), 1);
      return change < 0.5; // Allow up to 50% change
    }

    // For objects, check structural similarity
    if (
      typeof val1 === 'object' &&
      val1 !== null &&
      typeof val2 === 'object' &&
      val2 !== null
    ) {
      const keys1 = Object.keys(val1 as Record<string, unknown>);
      const keys2 = Object.keys(val2 as Record<string, unknown>);
      const commonKeys = keys1.filter((k) => keys2.includes(k));
      return commonKeys.length / Math.max(keys1.length, keys2.length) > 0.7;
    }

    return false;
  }

  /**
   * Calculate alignment score between two states
   */
  private calculateAlignmentScore(
    state1: Record<string, unknown>,
    state2: Record<string, unknown>
  ): number {
    const keys1 = Object.keys(state1);
    const keys2 = Object.keys(state2);

    if (keys1.length === 0 && keys2.length === 0) {
      return 1.0;
    }

    const allKeys = new Set([...keys1, ...keys2]);
    let aligned = 0;

    for (const key of allKeys) {
      const val1 = state1[key];
      const val2 = state2[key];

      if (val1 === undefined || val2 === undefined) {
        aligned += 0.5; // Partial alignment if one missing
      } else if (this.valuesAligned(val1, val2)) {
        aligned += 1.0;
      } else {
        aligned += 0.3; // Low alignment
      }
    }

    return aligned / allKeys.size;
  }

  /**
   * Check if two values are aligned
   */
  private valuesAligned(val1: unknown, val2: unknown): boolean {
    if (val1 === val2) {
      return true;
    }

    if (typeof val1 === 'number' && typeof val2 === 'number') {
      return Math.abs(val1 - val2) < 0.01; // Very close values
    }

    return false;
  }

  /**
   * Apply causal-resolution mapping when coherence fails
   */
  async applyCausalResolution(
    tcxDbId: string,
    states: {
      presentState: Record<string, unknown>;
      futureProjection: Record<string, unknown>;
      pastAlignment: Record<string, unknown>;
    }
  ): Promise<void> {
    // Determine resolution type based on state analysis
    const resolutionType = this.determineResolutionType(states);

    // Create resolution mapping
    const resolutionMapping = this.createResolutionMapping(
      states,
      resolutionType
    );

    // Create resolution record
    await prisma.causalResolution.create({
      data: {
        resolutionId: `RES-${uuidv4()}`,
        tcxId: tcxDbId,
        resolutionType,
        resolutionMapping: resolutionMapping as unknown as object,
        status: 'pending',
      },
    });

    // Update transaction with resolution mapping
    await prisma.transCausalTransaction.update({
      where: { id: tcxDbId },
      data: {
        resolutionMapping: resolutionMapping as unknown as object,
        status: 'resolving',
      },
    });
  }

  /**
   * Determine resolution type based on state analysis
   */
  private determineResolutionType(states: {
    presentState: Record<string, unknown>;
    futureProjection: Record<string, unknown>;
    pastAlignment: Record<string, unknown>;
  }): string {
    // Analyze states to determine resolution type
    if (this.hasTemporalLoop(states)) {
      return 'temporal_loop';
    }
    if (this.hasRetrocausalFlow(states)) {
      return 'retrocausal';
    }
    if (this.hasForwardPrediction(states)) {
      return 'forward_predicted';
    }
    if (this.hasQuantumTimeline(states)) {
      return 'quantum_timeline';
    }

    return 'standard';
  }

  /**
   * Check for temporal loop indicators
   */
  private hasTemporalLoop(states: {
    presentState: Record<string, unknown>;
    futureProjection: Record<string, unknown>;
    pastAlignment: Record<string, unknown>;
  }): boolean {
    // Simplified check - in production would use temporal logic
    return (
      JSON.stringify(states.presentState) ===
      JSON.stringify(states.futureProjection)
    );
  }

  /**
   * Check for retrocausal data flow
   */
  private hasRetrocausalFlow(states: {
    presentState: Record<string, unknown>;
    futureProjection: Record<string, unknown>;
    pastAlignment: Record<string, unknown>;
  }): boolean {
    // Check if future influences past
    return (
      Object.keys(states.futureProjection).length > 0 &&
      Object.keys(states.pastAlignment).length > 0 &&
      this.hasOverlap(states.futureProjection, states.pastAlignment)
    );
  }

  /**
   * Check for forward prediction
   */
  private hasForwardPrediction(states: {
    presentState: Record<string, unknown>;
    futureProjection: Record<string, unknown>;
    pastAlignment: Record<string, unknown>;
  }): boolean {
    return Object.keys(states.futureProjection).length > 0;
  }

  /**
   * Check for quantum timeline indicators
   */
  private hasQuantumTimeline(states: {
    presentState: Record<string, unknown>;
    futureProjection: Record<string, unknown>;
    pastAlignment: Record<string, unknown>;
  }): boolean {
    // Check for quantum state indicators
    const allStates = [
      states.presentState,
      states.futureProjection,
      states.pastAlignment,
    ];
    return allStates.some((s) => s.quantumState !== undefined);
  }

  /**
   * Check if two objects have overlapping keys
   */
  private hasOverlap(
    obj1: Record<string, unknown>,
    obj2: Record<string, unknown>
  ): boolean {
    const keys1 = Object.keys(obj1);
    const keys2 = Object.keys(obj2);
    return keys1.some((k) => keys2.includes(k));
  }

  /**
   * Create resolution mapping
   */
  private createResolutionMapping(
    states: {
      presentState: Record<string, unknown>;
      futureProjection: Record<string, unknown>;
      pastAlignment: Record<string, unknown>;
    },
    resolutionType: string
  ): Record<string, unknown> {
    return {
      resolutionType,
      presentState: states.presentState,
      futureProjection: states.futureProjection,
      pastAlignment: states.pastAlignment,
      resolutionStrategy: this.getResolutionStrategy(resolutionType),
      timestamp: new Date().toISOString(),
    };
  }

  /**
   * Get resolution strategy for resolution type
   */
  private getResolutionStrategy(resolutionType: string): string {
    const strategies: Record<string, string> = {
      temporal_loop: 'defer_until_loop_resolved',
      retrocausal: 'apply_retrocausal_correction',
      forward_predicted: 'validate_prediction_confidence',
      quantum_timeline: 'collapse_quantum_states',
      standard: 'standard_reconciliation',
    };

    return strategies[resolutionType] || 'standard_reconciliation';
  }

  /**
   * Get trans-causal transaction by ID
   */
  async getTransCausalTransaction(tcxId: string) {
    return prisma.transCausalTransaction.findUnique({
      where: { tcxId },
      include: {
        resolutions: true,
      },
    });
  }

  /**
   * Resolve a deferred transaction
   */
  async resolveTransaction(
    tcxId: string,
    resolutionResult: Record<string, unknown>
  ) {
    const tcx = await prisma.transCausalTransaction.findUnique({
      where: { tcxId },
    });

    if (!tcx) {
      throw new Error(`Transaction ${tcxId} not found`);
    }

    // Recalculate coherence with resolution
    const updatedStates = {
      presentState: tcx.presentState as Record<string, unknown>,
      futureProjection: tcx.futureProjection as Record<string, unknown>,
      pastAlignment: tcx.pastAlignment as Record<string, unknown>,
      ...resolutionResult,
    };

    const coherence = await this.calculateCausalCoherence(
      updatedStates.presentState,
      updatedStates.futureProjection,
      updatedStates.pastAlignment,
      tcx.coherenceThreshold
    );

    if (coherence.coherent) {
      await prisma.transCausalTransaction.update({
        where: { tcxId },
        data: {
          status: 'coherent',
          causalCoherence: new Decimal(coherence.coherenceScore),
          resolvedAt: new Date(),
        },
      });
    }

    return coherence;
  }
}

export const tcmpService = new TcmpService();

