Untitled

import android.os.Bundle
import android.os.CountDownTimer
import android.view.View
import android.widget.Button
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    private var timerTextView: TextView? = null
    private var historyTextView: TextView? = null
    private var startButton: Button? = null
    private var stopButton: Button? = null
    private var countDownTimer: CountDownTimer? = null
    private var isTimerRunning = false
    private var timeLeftInMillis: Long = 30000 // 30 seconds
    private val timerHistory: MutableList<String> = ArrayList()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        timerTextView = findViewById<TextView>(R.id.timerTextView)
        historyTextView = findViewById<TextView>(R.id.historyTextView)
        startButton = findViewById(R.id.startButton)
        stopButton = findViewById<Button>(R.id.stopButton)

        updateTimerText()

        startButton!!.setOnClickListener {
            if (!isTimerRunning) {
                startTimer()
            }
        }

        stopButton!!.setOnClickListener {
            if (isTimerRunning) {
                stopTimer()
            }
        }
    }

    private fun startTimer() {
        countDownTimer = object : CountDownTimer(timeLeftInMillis, 1000) {
            override fun onTick(millisUntilFinished: Long) {
                timeLeftInMillis = millisUntilFinished
                updateTimerText()
            }

            override fun onFinish() {
                isTimerRunning = false
                timerHistory.add(formatTime(30000 - timeLeftInMillis) + " seconds")
                if (timerHistory.size > 5) {
                    timerHistory.removeAt(0)
                }
                updateHistoryText()
                resetTimer()
            }
        }.start()

        isTimerRunning = true
    }

    private fun stopTimer() {
        countDownTimer!!.cancel()
        isTimerRunning = false
        timerHistory.add(formatTime(30000 - timeLeftInMillis) + " seconds (stopped)")
        if (timerHistory.size > 5) {
            timerHistory.removeAt(0)
        }
        updateHistoryText()
        resetTimer()
    }

    private fun resetTimer() {
        timeLeftInMillis = 30000 // Reset to 30 seconds
        updateTimerText()
    }

    private fun updateTimerText() {
        val seconds = (timeLeftInMillis / 1000).toInt()
        timerTextView!!.text = String.format("%02d", seconds)
    }

    private fun updateHistoryText() {
        val history = StringBuilder("Last 5 Timers:\n")
        for (entry in timerHistory) {
            history.append(entry).append("\n")
        }
        historyTextView!!.text = history.toString()
    }

    private fun formatTime(millis: Long): String {
        return (millis / 1000).toString()
    }
}