// Verifiable Credential (VC) verification for promotion codes
// TODO: This module needs implementation for VC-based promotion code validation

import logger from '../logger';

/**
 * VC verification config interface
 */
export interface VCConfig {
  roles?: string[];
  trusted_issuers?: string[];
}

/**
 * VC verification result interface
 */
export interface VCVerificationResult {
  valid: boolean;
  matchedVCs: Array<{
    vcId: string;
    issuer: string;
    role?: string;
    claims: Record<string, any>;
  }>;
  error?: string;
}

/**
 * Verify Verifiable Credential (VC) using separated VC config structure
 * TODO: This module needs to be implemented for VC-based verification
 */
export function verifyVCConfig(userDid: string, vcConfig: VCConfig): Promise<VCVerificationResult> {
  return Promise.resolve()
    .then(() => {
      logger.info('VC verification called', { userDid, vcConfig });

      // TODO: Implement proper VC verification client
      // This should:
      // 1. Connect to a VC storage/registry service
      // 2. Retrieve user's verifiable credentials
      // 3. Validate credential signatures and expiration
      // 4. Check issuer trust and role requirements
      // 5. Return matching credentials

      // Placeholder implementation - always returns false for now
      return {
        valid: false, // TODO: Implement actual verification
        matchedVCs: [],
        error: 'VC verification not yet implemented',
      };
    })
    .catch((error) => {
      logger.error('Error verifying VC config', {
        userDid,
        vcConfig,
        error: error.message,
      });

      return {
        valid: false,
        matchedVCs: [],
        error: `VC verification failed: ${error.message}`,
      };
    });
}

// TODO: Additional VC-related functions to be implemented:
// - validateVCFormat(vc: any): boolean
// - checkVCExpiration(vc: any): boolean
// - verifyVCSignature(vc: any): Promise<boolean>
// - getVCsForUser(userDid: string): Promise<any[]>
// - checkVCIssuerTrust(issuer: string, trustedIssuers: string[]): boolean
// - extractVCClaims(vc: any): Record<string, any>
