// Trade Harmonization Service - Pillar IV

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


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

  /**
   * Initialize default trade harmonization rules
   */
  async initializeDefaultRules(): Promise<void> {
    const rules = [
      {
        pillar: HarmonizationPillar.TRADE,
        ruleCode: 'ICC_UCP_ADOPTION',
        name: 'ICC UCP/URDG/eUCP Uniform Adoption',
        description: 'Uniform adoption of ICC trade finance standards',
        requirements: [
          'Adopt UCP 600 for letters of credit',
          'Implement URDG 758 for demand guarantees',
          'Support eUCP for electronic documents',
        ],
        status: 'ACTIVE' as const,
      },
      {
        pillar: HarmonizationPillar.TRADE,
        ruleCode: 'DIGITAL_DOCUMENTS',
        name: 'Standardized Digital Document Formats',
        description: 'Unified digital document formats for trade finance',
        requirements: [
          'Use ISO 20022 for trade messages',
          'Support digital signatures',
          'Maintain document integrity',
        ],
        status: 'ACTIVE' as const,
      },
      {
        pillar: HarmonizationPillar.TRADE,
        ruleCode: 'TOKENIZATION_RULES',
        name: 'Commodity and Security Tokenization Rules',
        description: 'Standardized rules for tokenizing commodities and securities',
        requirements: [
          'Follow CBDS (Commodity-Backed Digital System) standards',
          'Implement security token standards',
          'Maintain token-backing verification',
        ],
        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 trade harmonization rules');
  }

  /**
   * Assess compliance with trade 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 'ICC_UCP_ADOPTION':
        // Check if ISO messages are used
        const isoMessages = await prisma.iso_messages.findFirst({
          where: { sovereignBankId },
        });
        return !!isoMessages;
      case 'DIGITAL_DOCUMENTS':
        // Check if digital signatures are used
        const identities = await prisma.sovereign_identities.findFirst({
          where: { sovereignBankId },
        });
        return !!identities;
      case 'TOKENIZATION_RULES':
        // Check if commodities are tokenized
        const commodities = await prisma.commodity_digital_tokens.findFirst({
          where: { sovereignIssuerId: sovereignBankId },
        });
        return !!commodities;
      default:
        return false;
    }
  }
}

export const tradeHarmonizationService = new TradeHarmonizationService();

