class ScLoan {
  constructor({ gatewayName }) {};

  // LOS (Loan origination)
  apply({ interactionToken }) {};


  // LMS (Loan servicing)
  pay({ interactionToken }) {};
  withdraw({ interactionToken }) {};
}

class ScLoan {
    /**
     * @typedef {Object} ScLoanConfig
     * @property {String} gatewayName
     * @property {'production'}  environment - environment
     */

    /**
     * Setup ScLoans
     *
     * @param {ScLoanConfig} config
     * @returns {Promise<String>}
     */
    const setup = async (config) => {};

    /**
     * LoanInfo object required for every SDK interaction
     * @typedef {Object} LoanInfo
     * @property {String} interactionToken
     */

    /**
     * Triggers the user journey for loan application.
     *
     * @param {LoanInfo} loanInfo
     * @returns {Promise<String>}
     */
    const apply = async (loanInfo) => {};

    /**
     * Triggers the user journey for loan repayment.
     *
     * @param {LoanInfo} loanInfo
     * @returns {Promise<String>}
     */
    const pay = async (loanInfo) => {};

    /**
     * Triggers the user journey for withdrawing the loan amount.
     *
     * @param {LoanInfo} loanInfo
     * @returns {Promise<String>}
     */
    const withdraw = async (loanInfo) => {};
}

object SCLoan {
    // Setup the SCLoan SDK
    fun setup(config: SCLoanConfig, listener: SCLoanResult)

    // Triggers the user journey for loan application
    fun apply(activity: AppCompatActivity, config: ScLoanInfo, listener: SCLoanResult)

    // Triggers the user journey for loan repayment
    fun pay(activity: AppCompatActivity, config: ScLoanInfo, listener: SCLoanResult)

    // Triggers the user journey for withdrawing the loan amount
    fun withdraw(activity: AppCompatActivity, config: ScLoanInfo, listener: SCLoanResult)
}

// Callback interface for every SDK method:
interface SCLoanResult {
    fun onSuccess(response: SCLoanSuccess)

    fun onFailure(error: SCLoanError)
}

// Success callback returns
data class SCLoanSuccess(val isSuccess: Boolean, val data: String?)

// Failure callback returns
data class SCLoanError(val code: Int, val message: String, val data: String?)

// LoanInfo object required for every SDK interaction
class ScLoanInfo(val interactionToken: String)

public class SCLoan {
  // Setup the SCLoan SDK
  @objc public func setup(
    config: SCLoanConfig,
    completion: @escaping (SCLoanSuccess?, SCLoanError?) -> Void
  )

  // where SCLoanConfig is:
  class SCLoanConfig: NSObject {
    let gatewayName: String?
    let environment: SCLoanEnvironment?
  }

  // Triggers the user journey for loan application
  @objc public func apply(
    presentingController: UIViewController,
    loanInfo: LoanInfo,
    completion: @escaping (SCLoanSuccess?, SCLoanError?) -> Void
  )

  // Triggers the user journey for loan repayment
  @objc public func pay(
    presentingController: UIViewController,
    loanInfo: LoanInfo,
    completion: @escaping (SCLoanSuccess?, SCLoanError?) -> Void
  )

  // Triggers the user journey for withdrawing the loan amount
  @objc public func withdraw(
    presentingController: UIViewController,
    loanInfo: LoanInfo,
    completion: @escaping (SCLoanSuccess?, SCLoanError?) -> Void
  )

}

// Where the success object is
public class SCLoanSuccess: NSObject {
  let isSuccess: Bool
  let data: String?
}

// And the error object is
public class SCLoanError: NSError {
  let isSuccess: Bool
  let errorCode: Int
  let errorMessage: String
  let data: String?
}

// LoanInfo object required for every SDK interaction
class LoanInfo: NSObject {
  let interactionToken: String
}