import Foundation

/**
 An empty protocol that Objective-C can refer to as a type of the modules provider.
 In Objective-C code we do not do anything with it except passing it back to the Swift light side.
 */
@objc
public protocol ModulesProviderObjCProtocol {}

/**
 Swift protocol defining the requirements for modules providers. Extends its Objective-C counterpart `ModulesProviderObjCProtocol`.
 */
public protocol ModulesProviderProtocol: ModulesProviderObjCProtocol {
  func getModuleClasses() -> [AnyModule.Type]

  /**
   Returns an array of classes that hooks into `ExpoAppDelegate` to receive app delegate events.
   */
  func getAppDelegateSubscribers() -> [ExpoAppDelegateSubscriber.Type]

  typealias ExpoReactDelegateHandlerTupleType = (packageName: String, handler: ExpoReactDelegateHandler.Type)
  /**
   Returns an array of `ExpoReactDelegateHandlerTupleType` for `ReactDelegate` to hook React instance creation.
   */
  func getReactDelegateHandlers() -> [ExpoReactDelegateHandlerTupleType]
}

/**
 The default implementation for modules provider.
 The proper implementation is generated by autolinking as part of `pod install` command.
 */
@objc
open class ModulesProvider: NSObject, ModulesProviderProtocol, ModulesProviderObjCProtocol {
  open func getModuleClasses() -> [AnyModule.Type] {
    return []
  }

  open func getAppDelegateSubscribers() -> [ExpoAppDelegateSubscriber.Type] {
    return []
  }

  open func getReactDelegateHandlers() -> [ExpoReactDelegateHandlerTupleType] {
    return []
  }
}