// Monetary Harmonization Service - Pillar I

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


export class MonetaryHarmonizationService {
  /**
   * Get monetary harmonization rules
   */
  async getRules() {
    return prisma.regulatoryHarmonizationRule.findMany({
      where: { pillar: HarmonizationPillar.MONETARY },
      orderBy: { ruleCode: 'asc' },
    });
  }

  /**
   * Initialize default monetary harmonization rules
   */
  async initializeDefaultRules(): Promise<void> {
    const rules = [
      {
        pillar: HarmonizationPillar.MONETARY,
        ruleCode: 'FX_STABILIZATION',
        name: 'FX Stabilization Rules',
        description: 'Rules for foreign exchange rate stabilization',
        requirements: [
          'Maintain FX reserves above minimum threshold',
          'Report FX interventions within 24 hours',
          'Coordinate with DBIS on major FX operations',
        ],
        status: 'ACTIVE' as const,
      },
      {
        pillar: HarmonizationPillar.MONETARY,
        ruleCode: 'SOVEREIGN_LIQUIDITY_MIN',
        name: 'Sovereign Liquidity Minimums',
        description: 'Minimum liquidity requirements for sovereign banks',
        requirements: [
          'Maintain liquidity ratio above 85%',
          'Report liquidity position daily',
          'Participate in Global Liquidity Pool',
        ],
        status: 'ACTIVE' as const,
      },
      {
        pillar: HarmonizationPillar.MONETARY,
        ruleCode: 'CBDC_INTEROPERABILITY',
        name: 'CBDC Interoperability Requirements',
        description: 'Requirements for CBDC cross-border interoperability',
        requirements: [
          'Support CIM (CBDC Interoperability Matrix)',
          'Implement standard CBDC conversion protocols',
          'Maintain CBDC wallet security standards',
        ],
        status: 'ACTIVE' as const,
      },
    ];

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

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

  /**
   * Assess compliance with monetary 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
    // In production, this would check actual compliance data
    switch (ruleCode) {
      case 'FX_STABILIZATION':
        // Check if FX reserves are maintained
        return true; // Placeholder
      case 'SOVEREIGN_LIQUIDITY_MIN':
        // Check liquidity ratio
        const liquidityScore = await prisma.liquidityScore.findFirst({
          where: { sovereignBankId },
          orderBy: { calculatedAt: 'desc' },
        });
        return liquidityScore ? Number(liquidityScore.score) >= 85 : false;
      case 'CBDC_INTEROPERABILITY':
        // Check CBDC issuance
        const cbdcIssuance = await prisma.cbdcIssuance.findFirst({
          where: { sovereignBankId },
        });
        return !!cbdcIssuance;
      default:
        return false;
    }
  }
}

export const monetaryHarmonizationService = new MonetaryHarmonizationService();

