import { logger } from '../../utils/logger';
import { PrivateAuditService } from './PrivateAuditService';

export interface PrivacyBridgeProof {
  proofId: string;
  tenantId: string;
  zkpPayload: any;
  teeEnclaveId: string;
  verifiedAt: Date;
  status: 'VERIFIED' | 'FAILED';
}

/**
 * [CORE_SEC_50] ZKP + TEE 隐私桥梁 (Privacy Bridge)
 * @description 核心逻辑：建立零知识证明 (ZKP) 与可信执行环境 (TEE) 之间的信任桥梁。
 * 系统利用 ZKP 在不泄露敏感数据的前提下证明交易的合法性，并利用 TEE (如 Intel SGX)
 * 在受硬件保护的隔离环境中执行最终的清算与对账逻辑。
 * 这种双重加密方案确保了跨主权贸易中的“数据主权”与“计算完整性”。
 */
export class PrivacyBridgeService {
  /**
   * 执行 ZKP -> TEE 隐私对账 (Privacy Reconciliation)
   */
  static async reconcileInEnclave(params: {
    tenantId: string;
    encryptedTransaction: string;
    zkpProof: string;
  }): Promise<PrivacyBridgeProof> {
    logger.info(`[PrivacyBridge] Starting secure reconciliation for Tenant: ${params.tenantId}`);

    try {
      // 1. 在 TEE 外部验证 ZKP 证明的有效性 (利用 PrivateAuditService)
      const isZkpValid = await PrivateAuditService.verifyProof(params.zkpProof, 'TEE_BRIDGE_AUDITOR');
      if (!isZkpValid) {
        throw new Error('ZKP Proof verification failed before entering TEE enclave.');
      }

      // 2. 模拟进入 TEE Enclave 执行计算
      const teeEnclaveId = `sgx-enclave-${Math.random().toString(36).substr(2, 10)}`;
      logger.info(`[PrivacyBridge] [TEE] Data moved to secure enclave: ${teeEnclaveId}`);

      // 3. 在 Enclave 内部执行敏感计算 (模拟)
      // 在真实场景中，这里会调用硬件指令或特定的 TEE SDK (如 Open Enclave)
      const reconciliationResult = {
        isMatch: true,
        discrepancy: 0,
        integrityHash: `tee-hash-${Date.now()}`
      };

      if (!reconciliationResult.isMatch) {
        throw new Error('Data integrity mismatch detected inside TEE enclave.');
      }

      const proof: PrivacyBridgeProof = {
        proofId: `PB-${Date.now()}`,
        tenantId: params.tenantId,
        zkpPayload: params.encryptedTransaction,
        teeEnclaveId,
        verifiedAt: new Date(),
        status: 'VERIFIED'
      };

      logger.info(`[PrivacyBridge] Secure reconciliation completed. Proof generated: ${proof.proofId}`);
      return proof;
    } catch (err: any) {
      logger.error(`[PrivacyBridge] Secure computation failed: ${err.message}`);
      throw err;
    }
  }

  /**
   * 远程度量 (Remote Attestation)
   * @description 验证 TEE 环境的真实性与代码完整性
   */
  static async performRemoteAttestation(enclaveId: string): Promise<boolean> {
    logger.info(`[PrivacyBridge] Performing remote attestation for Enclave: ${enclaveId}`);
    // 模拟调用 Intel IAS (Intel Attestation Service) 或类似服务
    return true;
  }
}
