//
// Copyright 2020-2021 Signal Messenger, LLC.
// SPDX-License-Identifier: AGPL-3.0-only
//

import Foundation
import SignalFfi

public class ServerZkReceiptOperations {

  let serverSecretParams: ServerSecretParams

  public init(serverSecretParams: ServerSecretParams) {
    self.serverSecretParams = serverSecretParams
  }

  public func issueReceiptCredential(receiptCredentialRequest: ReceiptCredentialRequest, receiptExpirationTime: UInt64, receiptLevel: UInt64) throws -> ReceiptCredentialResponse {
    return try issueReceiptCredential(randomness: Randomness.generate(), receiptCredentialRequest: receiptCredentialRequest, receiptExpirationTime: receiptExpirationTime, receiptLevel: receiptLevel)
  }

  public func issueReceiptCredential(randomness: Randomness, receiptCredentialRequest: ReceiptCredentialRequest, receiptExpirationTime: UInt64, receiptLevel: UInt64) throws -> ReceiptCredentialResponse {
    return try serverSecretParams.withUnsafePointerToSerialized { serverSecretParams in
      try randomness.withUnsafePointerToBytes { randomness in
        try receiptCredentialRequest.withUnsafePointerToSerialized { receiptCredentialRequest in
          try invokeFnReturningSerialized {
            signal_server_secret_params_issue_receipt_credential_deterministic($0, serverSecretParams, randomness, receiptCredentialRequest, receiptExpirationTime, receiptLevel)
          }
        }
      }
    }
  }

  public func verifyReceiptCredentialPresentation(receiptCredentialPresentation: ReceiptCredentialPresentation) throws {
    try serverSecretParams.withUnsafePointerToSerialized { serverSecretParams in
      try receiptCredentialPresentation.withUnsafePointerToSerialized { receiptCredentialPresentation in
        try checkError(signal_server_secret_params_verify_receipt_credential_presentation(serverSecretParams, receiptCredentialPresentation))
        }
    }
  }

}