// UMMC Binding Clauses Service
// Clause validation and enforcement (XII-A, XII-F, XII-K)

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


export interface CreateClauseRequest {
  clauseCode: string;
  clauseName: string;
  description: string;
  pillarId?: string;
  bindingType: string;
  enforcementLevel: string;
}

export interface ClauseValidationRequest {
  clauseId: string;
  sovereignBankId?: string;
  validationType: string;
  validationData?: Record<string, unknown>;
}

export class UmmcBindingClausesService {
  /**
   * Create a binding clause
   */
  async createClause(request: CreateClauseRequest): Promise<UmmcBindingClause> {
    const clauseId = `UMMC-CLAUSE-${uuidv4()}`;

    const clause = await prisma.ummc_binding_clauses.create({
      data: {
        id: uuidv4(),
        clauseId,
        clauseCode: request.clauseCode,
        clauseName: request.clauseName,
        description: request.description,
        pillarId: request.pillarId || null,
        bindingType: request.bindingType,
        enforcementLevel: request.enforcementLevel,
        status: 'active',
        createdAt: new Date(),
        updatedAt: new Date(),
      },
    });

    return {
      clauseId: clause.clauseId,
      clauseCode: clause.clauseCode,
      clauseName: clause.clauseName,
      description: clause.description,
      pillarId: clause.pillarId || undefined,
      bindingType: clause.bindingType,
      enforcementLevel: clause.enforcementLevel,
      status: clause.status,
    };
  }

  /**
   * Get all clauses
   */
  async getAllClauses(includeSuspended = false): Promise<UmmcBindingClause[]> {
    const where: { status?: string } = {};
    if (!includeSuspended) {
      where.status = 'active';
    }

    const clauses = await prisma.ummc_binding_clauses.findMany({
      where,
      orderBy: { clauseCode: 'asc' },
      include: {
        ummc_constitutional_pillars: true,
      },
    });

    return clauses.map((clause) => ({
      clauseId: clause.clauseId,
      clauseCode: clause.clauseCode,
      clauseName: clause.clauseName,
      description: clause.description,
      pillarId: clause.pillarId || undefined,
      bindingType: clause.bindingType,
      enforcementLevel: clause.enforcementLevel,
      status: clause.status,
    }));
  }

  /**
   * Get clause by code
   */
  async getClauseByCode(clauseCode: string): Promise<UmmcBindingClause | null> {
    const clause = await prisma.ummc_binding_clauses.findFirst({
      where: {
        clauseCode,
        status: 'active',
      },
      include: {
        ummc_constitutional_pillars: true,
      },
    });

    if (!clause) {
      return null;
    }

    return {
      clauseId: clause.clauseId,
      clauseCode: clause.clauseCode,
      clauseName: clause.clauseName,
      description: clause.description,
      pillarId: clause.pillarId || undefined,
      bindingType: clause.bindingType,
      enforcementLevel: clause.enforcementLevel,
      status: clause.status,
    };
  }

  /**
   * Validate clause compliance
   */
  async validateClause(request: ClauseValidationRequest): Promise<{
    validationId: string;
    compliant: boolean;
    result: string;
  }> {
    const clause = await prisma.ummc_binding_clauses.findUnique({
      where: { clauseId: request.clauseId },
    });

    if (!clause) {
      throw new Error(`Clause not found: ${request.clauseId}`);
    }

    let compliant = false;
    let result = 'pending';

    // Execute validation based on clause type
    switch (clause.bindingType) {
      case 'multiversal_finality':
        compliant = await this.validateMultiversalFinality(request);
        break;
      case 'anti_divergence':
        compliant = await this.validateAntiDivergence(request);
        break;
      case 'sovereign_identity_equivalence':
        compliant = await this.validateSovereignIdentityEquivalence(request);
        break;
      default:
        compliant = true; // Default to compliant for unknown types
    }

    result = compliant ? 'compliant' : 'non_compliant';

    // Create validation record
    const validationId = `UMMC-VAL-${uuidv4()}`;
    await prisma.ummc_clause_validations.create({
      data: {
        validationId,
        clauseId: request.clauseId,
        sovereignBankId: request.sovereignBankId || null,
        validationType: request.validationType,
        validationResult: result,
        validationData: request.validationData || {},
        validatedAt: new Date(),
      },
    });

    return {
      validationId,
      compliant,
      result,
    };
  }

  /**
   * Validate Clause XII-A: Multiversal Finality
   */
  private async validateMultiversalFinality(
    request: ClauseValidationRequest
  ): Promise<boolean> {
    // DBIS-calculated finality is binding even if local ledgers disagree
    // Check if local ledger state matches DBIS Prime Ledger state
    // For now, assume compliance if no explicit divergence detected
    return true;
  }

  /**
   * Validate Clause XII-F: Anti-Divergence Doctrine
   */
  private async validateAntiDivergence(request: ClauseValidationRequest): Promise<boolean> {
    if (!request.sovereignBankId) {
      return true;
    }

    // Check if monetary drift between realities remains within controlled divergence bands
    const mapping = await prisma.ummc_sovereign_mappings.findFirst({
      where: {
        sovereignBankId: request.sovereignBankId,
        status: 'active',
      },
    });

    if (!mapping || !mapping.divergenceBand) {
      return true; // No divergence band set, assume compliant
    }

    // Compare current divergence against allowed band
    // For now, assume compliance - actual implementation would check against real data
    const currentDivergence = new Decimal(0); // Placeholder
    return currentDivergence.lessThanOrEqualTo(mapping.divergenceBand);
  }

  /**
   * Validate Clause XII-K: Sovereign Identity Equivalence
   */
  private async validateSovereignIdentityEquivalence(
    request: ClauseValidationRequest
  ): Promise<boolean> {
    if (!request.sovereignBankId) {
      return true;
    }

    // An SCB's identity supersedes its existential layer
    // Check continuity identity exists and is unified
    const continuity = await prisma.sovereign_continuity_identities.findFirst({
      where: {
        sovereignBankId: request.sovereignBankId,
        status: 'active',
      },
    });

    return continuity !== null && continuity.unifiedIdentity !== null;
  }

  /**
   * Initialize default Volume XII clauses
   */
  async initializeDefaultClauses(): Promise<void> {
    // Get pillars first
    const pillar1 = await prisma.ummc_constitutional_pillars.findFirst({
      where: { pillarNumber: 1 },
    });
    const pillar2 = await prisma.ummc_constitutional_pillars.findFirst({
      where: { pillarNumber: 2 },
    });

    const defaultClauses: CreateClauseRequest[] = [
      {
        clauseCode: 'XII-A',
        clauseName: 'Multiversal Finality',
        description: 'DBIS-calculated finality is binding even if local ledgers disagree.',
        pillarId: pillar1?.pillarId,
        bindingType: 'multiversal_finality',
        enforcementLevel: 'strict',
      },
      {
        clauseCode: 'XII-F',
        clauseName: 'Anti-Divergence Doctrine',
        description: 'Monetary drift between realities must remain within controlled divergence bands.',
        pillarId: pillar2?.pillarId,
        bindingType: 'anti_divergence',
        enforcementLevel: 'strict',
      },
      {
        clauseCode: 'XII-K',
        clauseName: 'Sovereign Identity Equivalence',
        description: "An SCB's identity supersedes its existential layer.",
        pillarId: pillar1?.pillarId,
        bindingType: 'sovereign_identity_equivalence',
        enforcementLevel: 'strict',
      },
    ];

    for (const clauseData of defaultClauses) {
      const existing = await prisma.ummc_binding_clauses.findFirst({
        where: { clauseCode: clauseData.clauseCode },
      });

      if (!existing) {
        await this.createClause(clauseData);
      }
    }
  }
}

