//
//  RecipientsInteractor.swift
//  GME Remit
//
//  Created by InKwon James Kim on 08/08/2019.
//Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import Foundation

class RecipientsInteractor {
  
  // MARK: Properties
  
  weak var output: RecipientsInteractorOutput?
  private let service: RecipientsServiceType
  
  private var recipients: [Recipient]?
  private var accounts: [Account]?
  
  // MARK: Initialization
  
  init(service: RecipientsServiceType) {
    self.service = service
  }
  
}

// MARK: Recipients interactor input interface

extension RecipientsInteractor: RecipientsInteractorInput {
  func fetchRecipients(isRefresh: Bool) {
    if isRefresh {
      fetchRecipients()
      return
    }
    
    guard
      let recipients = self.recipients,
      let accounts = self.accounts
      else {
        fetchRecipients()
        return
      }
    
    output?.setRecipients(using: recipients)
    output?.setAccounts(using: accounts)
  }
  
  func deleteRecipient(who recipient: Recipient) {
    let myUsername = GMEDB.shared.user.string(.userId) ?? ""
    service.deleteRecipient(
      username: myUsername,
      reciepient: recipient,
      success: { self.fetchRecipients(isRefresh: true) },
      failure: {self.output?.setError(with: $0)}
    )
  }
  
  private func fetchRecipients() {
    service.fetchRecipients(
      success: {
        self.recipients = $0.recipients
        self.accounts = $0.accounts
        
        self.output?.setRecipients(using: $0.recipients ?? [])
        self.output?.setAccounts(using: $0.accounts ?? [])
    },
      failure: { self.output?.setError(with:$0) }
    )
  }
}