package xibbar

import javax.swing.{JFrame,JLabel,JTextField,JButton,JPanel,BoxLayout}
import java.awt.event.{ActionListener,ActionEvent}

object LoanProcessor {
  def main(args: Array[String]){
    val window=new MainWindow()
    window.show
    window.updateResult
  }

}

class MainWindow extends JFrame{
  this.setSize(200,200)
  this.setTitle("ローン計算")
  this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
  val panel=new JPanel()
  val amountField=new JTextField(10)
  val yearField=new JTextField(10)
  val rateField=new JTextField(10)
  val monthlyPayLabel=new JLabel()
  val yearlyPayLabel=new JLabel()
  val processButton=new JButton("計算")
  val finishButton=new JButton("終了")
  val boxLayout=new BoxLayout(panel,BoxLayout.Y_AXIS)
  this.getContentPane().add(panel)
  panel.setLayout(boxLayout)

  panel.add(amountField)
  panel.add(yearField)
  panel.add(rateField)
  panel.add(monthlyPayLabel)
  panel.add(yearlyPayLabel)
  panel.add(processButton)
  panel.add(finishButton)

  amountField.setText("4000")
  yearField.setText("35")
  rateField.setText("3.05")

  processButton.addActionListener(new ActionListener(){
      def actionPerformed(e:ActionEvent){
        updateResult
      }
    }
  )
  finishButton.addActionListener(new ActionListener(){
      def actionPerformed(e:ActionEvent){
        System.exit(0)
      }
    }
  )

  def updateResult{
    val amount=amountField.getText().toInt
    val year=yearField.getText().toInt
    val rate=rateField.getText().toFloat
    val result=processing(amount,year,rate)
    monthlyPayLabel.setText("毎月支払額:"+(result).toInt)
    yearlyPayLabel.setText("年間支払額:"+(result).toInt*12)
  }
  def processing(amount: Int, year: Int, rate: Float): Double={
    amount*10000*(rate/12/100)/(1-Math.pow(1+rate/12/100,-year*12))
  }
}