/**
 * Copyright (c) 2016-present Invertase Limited & Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this library except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

import Foundation
import FirebaseAnalytics
import StoreKit

/// Swift wrapper for logging a verified StoreKit 2 transaction to Firebase Analytics.
/// Accessible from Objective-C; necessary because StoreKit 2 and Analytics.logTransaction use Swift async APIs.
/// Call from ObjC only when @available(iOS 15.0, *) (see RNFBFunctionsStreamHandler pattern).
@available(iOS 15.0, macOS 12.0, *)
@objcMembers public class RNFBAnalyticsLogTransaction: NSObject {

  private static let kCode = "firebase_analytics"
  private var logTask: Task<Void, Never>?

  /// Resolve/reject types matching RCTPromiseResolveBlock / RCTPromiseRejectBlock for React Native bridge.
  @objc public func logTransaction(
    transactionId: String,
    resolve: @escaping (Any?) -> Void,
    reject: @escaping (String, String, NSError?) -> Void
  ) {
    logTask = Task {
      await performLogTransaction(transactionId: transactionId, resolve: resolve, reject: reject)
      logTask = nil
    }
  }

  private func performLogTransaction(
    transactionId: String,
    resolve: @escaping (Any?) -> Void,
    reject: @escaping (String, String, NSError?) -> Void
  ) async {
    guard let id = UInt64(transactionId) else {
      await MainActor.run { reject(Self.kCode, "Invalid transactionId", nil) }
      return
    }

    var foundTransaction: StoreKit.Transaction?
    for await result in StoreKit.Transaction.all {
      switch result {
      case let .verified(transaction):
        if transaction.id == id {
          foundTransaction = transaction
          break
        }
      case .unverified:
        continue
      }
    }

    guard let transaction = foundTransaction else {
      await MainActor.run { reject(Self.kCode, "Transaction not found", nil) }
      return
    }

    Analytics.logTransaction(transaction)
    await MainActor.run { resolve(NSNull()) }
  }
}