//
//  TotalManageAccountsInteractor.swift
//  GME Remit
//
//  Created by InKwon James Kim on 2019/11/15.
//Copyright © 2019 Gobal Money Express Co. Ltd. All rights reserved.
//

import Foundation

class TotalManageAccountsInteractor {
  
  // MARK: Properties
  
  weak var output: TotalManageAccountsInteractorOutput?
  private let service: TotalManageAccountsServiceType
  private var accounts: [TotalAccount]?
  private var kftcModel: KFTCModel?
  
  // MARK: Initialization
  init(service: TotalManageAccountsServiceType) {
    self.service = service
  }
  
}

// MARK: TotalManageAccounts interactor input interface

extension TotalManageAccountsInteractor: TotalManageAccountsInteractorInput {
  func fetchAccounts(_ type: AccountType) {
    
    guard let accounts = self.accounts else {
      callAPI()
      return
    }
    
    switch type {
    case .all:
      output?.setAccounts(accounts, kftcModel: kftcModel)
    case .primary:
      output?.setAccounts(
        accounts.filter {$0.accountType.filter {element in element == "primary"}.count != 0},
        kftcModel: kftcModel
      )
    case .autodebit:
      output?.setAccounts(
        accounts.filter {$0.accountType.filter {element in element == "autodebit"}.count != 0},
        kftcModel: kftcModel
      )
    case .inbound:
      output?.setAccounts(
        accounts.filter {$0.accountType.filter {element in element == "inbound"}.count != 0},
        kftcModel: kftcModel
      )
    case .none:
      output?.setAccounts(
        accounts.filter {$0.accountType.count == 0},
        kftcModel: kftcModel
      )
    }
  }
  
  private func callAPI() {
    let userId = GMEDB.shared.user.string(.userId) ?? ""
    service.fetchAutodebitAccounts(
      username: userId,
      success: {[weak self] kftcModel in
        var accounts = kftcModel?.model?.map {
          TotalAccount(
            autodebitID: $0.kftcAccountId,
            accountNo: $0.accountNumMasked,
            bankName: $0.bankName,
            bankCode: $0.bankCode,
            isPrimary: nil,
            isPennyTestRequested: $0.isInboundPennyTestRequested,
            isPennyTestSuccess: nil
          )
        }
        
        self?.service.fetchInboundAccounts(
          success: {[weak self] models in
            let inboundAccounts = models.map {
              TotalAccount(
                autodebitID: nil,
                accountNo: $0.accountNo,
                bankName: $0.bankName,
                bankCode: $0.bankCode,
                isPrimary: $0.isPrimary,
                isPennyTestRequested: nil,
                isPennyTestSuccess: $0.isPennyTestSuccess
              )
            }
            
            var dic = accounts?.toDictionary { "\($0.bankCode ?? "")/\($0.accountNo ?? "")" }
            
            inboundAccounts.forEach {
              if var element = dic?["\($0.bankCode ?? "")/\($0.accountNo ?? "")"] {
                element.isPennyTestSuccess = $0.isPennyTestSuccess
                element.isPrimary = $0.isPrimary
                dic?["\($0.bankCode ?? "")/\($0.accountNo ?? "")"] = element
              } else {
                dic?["\($0.bankCode ?? "")/\($0.accountNo ?? "")"] = $0
              }
            }
            
            accounts = dic?.map { $0.value }.sorted { $0.accountType.count > $1.accountType.count }
            
            if let primaryElement = accounts?.enumerated().first(where: { $0.element.isPrimary ?? false }) {
              accounts?.remove(at: primaryElement.offset)
              accounts?.insert(primaryElement.element, at: 0)
            }
            
            self?.accounts = accounts
            self?.kftcModel = kftcModel
            self?.output?.setAccounts(self?.accounts ?? [], kftcModel: kftcModel)
          },
          failure: {[weak self] in
            self?.output?.setError(with: $0)
          }
        )
      },
      failure: {[weak self] in
        self?.output?.setError(with: $0)
      }
    )
  }
  
  func refreshToken(language: KftcLanguage?) {
    guard
      let email = GMEDB.shared.user.string(.email),
      let language = language else { return }
    
    let service2 = AddAccountService()
    
    service.refreshTokenStep1(
      username: email,
      success: { response in
        let url = response?.url?.replacingOccurrences(
          of: "&lang=", with: "&lang=\(language.key ?? "eng")"
        ) ?? ""
        
        var header = [String: String]()
        response?.header?.forEach({
          header[$0.key ?? ""] = $0.value ?? ""
        })
        
        service2.fetchKftcUrlService(
          url: url,
          header: header,
          success: {
            self.output?.refreshTokenSuccess(header: response?.header, url: $0)
          },
          failure: {
            if $0.localizedDescription.contains("JSON") {
              self.output?.refreshTokenSuccess(header: response?.header, url: url)
            } else {
              self.output?.setError(with: $0)
            }
          }
        )
      },
      failure: {
        self.output?.setError(with: $0)
      }
    )
  }
}

fileprivate extension Array {
  func toDictionary<Key: Hashable>(with selectKey: (Element) -> Key) -> [Key:Element] {
    var dict = [Key: Element]()
    for element in self {
      dict[selectKey(element)] = element
    }
    return dict
  }
}