// Compliance Harmonization Service - Pillar III

import prisma from '@/shared/database/prisma';
import { HarmonizationPillar } from './types';
import { logger } from '@/infrastructure/monitoring/logger';


export class ComplianceHarmonizationService {
  /**
   * Get compliance harmonization rules
   */
  async getRules() {
    return prisma.regulatory_harmonization_rules.findMany({
      where: { pillar: HarmonizationPillar.COMPLIANCE },
      orderBy: { ruleCode: 'asc' },
    });
  }

  /**
   * Initialize default compliance harmonization rules
   */
  async initializeDefaultRules(): Promise<void> {
    const rules = [
      {
        pillar: HarmonizationPillar.COMPLIANCE,
        ruleCode: 'FATF_PLUS',
        name: 'FATF-Plus Standards',
        description: 'Enhanced FATF standards for AML/CTF',
        requirements: [
          'Implement FATF recommendations',
          'Exceed minimum FATF requirements',
          'Participate in FATF mutual evaluations',
        ],
        status: 'ACTIVE' as const,
      },
      {
        pillar: HarmonizationPillar.COMPLIANCE,
        ruleCode: 'INTEGRATED_SANCTIONS',
        name: 'Integrated Sanctions Regime',
        description: 'Unified sanctions screening across all sovereigns',
        requirements: [
          'Synchronize sanctions lists',
          'Implement real-time sanctions screening',
          'Report sanctions matches immediately',
        ],
        status: 'ACTIVE' as const,
      },
      {
        pillar: HarmonizationPillar.COMPLIANCE,
        ruleCode: 'AML_KYC_EQUIVALENCY',
        name: 'AML/KYC Equivalency Protocols',
        description: 'Recognition of equivalent AML/KYC standards',
        requirements: [
          'Accept equivalent KYC from other sovereigns',
          'Implement cross-sovereign KYC verification',
          'Maintain KYC data sharing agreements',
        ],
        status: 'ACTIVE' as const,
      },
    ];

    for (const rule of rules) {
      await prisma.regulatory_harmonization_rules.upsert({
        where: {
          pillar_ruleCode: {
            pillar: rule.pillar,
            ruleCode: rule.ruleCode,
          },
        },
        create: {
          id: `GRHS-${rule.pillar}-${rule.ruleCode}`,
          ...rule,
          applicableSovereigns: [],
          createdAt: new Date(),
          updatedAt: new Date(),
        },
        update: {
          name: rule.name,
          description: rule.description,
          requirements: rule.requirements,
          status: rule.status,
        },
      });
    }

    logger.info('Initialized compliance harmonization rules');
  }

  /**
   * Assess compliance with compliance harmonization
   */
  async assessCompliance(sovereignBankId: string): Promise<number> {
    const rules = await this.getRules();
    let compliantCount = 0;

    for (const rule of rules) {
      const isCompliant = await this.checkRuleCompliance(sovereignBankId, rule.ruleCode);
      if (isCompliant) {
        compliantCount++;
      }
    }

    return rules.length > 0 ? (compliantCount / rules.length) * 100 : 0;
  }

  /**
   * Check compliance with a specific rule
   */
  private async checkRuleCompliance(sovereignBankId: string, ruleCode: string): Promise<boolean> {
    // Simplified compliance check
    switch (ruleCode) {
      case 'FATF_PLUS':
        // Check if AML compliance records exist
        const amlRecords = await prisma.compliance_records.findFirst({
          where: {
            sovereignBankId,
            recordType: 'aml_check',
          },
        });
        return !!amlRecords;
      case 'INTEGRATED_SANCTIONS':
        // Check if sanctions screening is active
        const sanctionsList = await prisma.sanctions_lists.findFirst({
          where: { status: 'active' },
        });
        return !!sanctionsList;
      case 'AML_KYC_EQUIVALENCY':
        // Check if KYC/identity records exist
        const identityRecords = await prisma.sovereign_identities.findFirst({
          where: { sovereignBankId },
        });
        return !!identityRecords;
      default:
        return false;
    }
  }
}

export const complianceHarmonizationService = new ComplianceHarmonizationService();

