package com.example.flashlight

import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Color
import android.hardware.camera2.CameraAccessException
import android.hardware.camera2.CameraManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.os.Handler
import android.os.Looper
import android.widget.Button
import android.widget.ImageButton
import android.widget.SeekBar
import android.widget.TextView

class MainActivity : AppCompatActivity() {

    var flashLightStatus: Boolean = false
    var flashLightOn = false
    var counter: Long = 0
    private val handler = Handler(Looper.getMainLooper())

    @SuppressLint("SetTextI18n", "MissingInflatedId")
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val textView = findViewById<TextView>(R.id.text_view)
        val stateTextView = findViewById<TextView>(R.id.textview)
        val seek = findViewById<SeekBar>(R.id.seekBar)
        val button = findViewById<Button>(R.id.my_button)

        stateTextView.text = "Current State: " + flashLightOn.toString()

        // Initially, disable the SeekBar
        seek.isEnabled = false

        seek.setOnSeekBarChangeListener(
            object : SeekBar.OnSeekBarChangeListener {
                override fun onProgressChanged(
                    seekBar: SeekBar?,
                    progress: Int,
                    fromUser: Boolean
                ) {
                    counter = progress.toLong()
                    textView.text = counter.toString()
                }

                override fun onStartTrackingTouch(seekBar: SeekBar?) = Unit
                override fun onStopTrackingTouch(seekBar: SeekBar?) = Unit
            },
        )

        // Set an OnClickListener for the button
        button.setOnClickListener {
            stateTextView.text = "Current State: " + flashLightOn.toString()
            if (flashLightOn) {
                // If the flashlight is on, turn it off and change the button background to "Turn On"
                seek.isEnabled = false
                flashLightOn = false
                handler.removeCallbacksAndMessages(null)  // Stop the flashing effect
                openFlashLight()  // Ensure the flashlight is turned off
            } else {
                // If the flashlight is off, turn it on and change the button background to "Turn Off"
                seek.isEnabled = true
                flashLightOn = true
                HandleFlashlight()  // Start the flashlight logic with the flashing effect
            }
        }
    }

    override fun onBackPressed() {
        finish()
        System.exit(0)
    }

    private fun openFlashLight() {
        val cameraManager = getSystemService(Context.CAMERA_SERVICE) as CameraManager
        val cameraId = cameraManager.cameraIdList[0]
        if (flashLightOn) {
            try {
                cameraManager.setTorchMode(cameraId, true)
                flashLightStatus = true
            }
            catch (e: CameraAccessException) {
                e.printStackTrace()
            }
        } else {
            try {
                cameraManager.setTorchMode(cameraId, false)
                flashLightStatus = false
            }
            catch (e: CameraAccessException) {
                e.printStackTrace()
            }
        }
    }

    private fun HandleFlashlight() {
        // Clear any existing callbacks
        handler.removeCallbacksAndMessages(null)

        // Set up the repeating task
        handler.postDelayed(object : Runnable {
            override fun run() {
                if (flashLightOn) {
                    openFlashLight()  // Turn the flashlight on
                } else {
                    openFlashLight()  // Turn the flashlight off
                }

                // Toggle the flashlight state for the next cycle
                flashLightOn = !flashLightOn

                // Schedule the next toggle after 'counter' milliseconds
                handler.postDelayed(this, counter)
            }
        }, counter)
    }
}