package com.example.flashimpulser;

import androidx.appcompat.app.AppCompatActivity;

import android.content.pm.PackageManager;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraManager;
import android.os.Bundle;
import android.view.View;
import android.widget.SeekBar;
import android.widget.Switch;
import android.widget.ToggleButton;

import java.util.Timer;
import java.util.TimerTask;

public class MainActivity extends AppCompatActivity {

    //--< Variables for Flash >--
    boolean _isFlashAvailable;
    CameraManager _CameraManager;
    String _CameraId;
    boolean _flashIsOn = false;
    //--</ Variables for Flash >--

    Switch _switchImpuler;
    ToggleButton _toggleButton;
    int _milliSeconds_HIGH =1000;
    int _milliSedonds_LOW =1000;

    //========< #region: Activity >========
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //--------< onCreate() >--------
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //----< init >----

        _switchImpuler=findViewById(R.id.switchFlasher);
        _toggleButton= findViewById(R.id.btnToggleLight);

        //---< SeekBars >---
        SeekBar seekbarHIGH =findViewById(R.id.seekBarHIGH);
        _milliSeconds_HIGH =seekbarHIGH.getMax();
        seekbarHIGH.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                _milliSeconds_HIGH =i;
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
            }
        });

        SeekBar seekbarLOW =findViewById(R.id.seekBarLOW);
        _milliSedonds_LOW =seekbarLOW.getMax();
        seekbarLOW.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
                _milliSedonds_LOW =i;
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {
            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
            }
        });

        //---< SeekBars >---

        //-< FlashLight >-
        //*flashlight is part of camera
        _isFlashAvailable = getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);
        _CameraManager = (CameraManager) getSystemService(CAMERA_SERVICE);
        try {
            _CameraId = _CameraManager.getCameraIdList()[0];
        } catch (CameraAccessException e) {
            //e.printStackTrace();
        }
        //-</ FlashLight >-
        //----</ init >----
        //--------</ onCreate() >--------
    }
    //========</ #region: Activity >========

    //========< #region: Buttons+Views >========
    public void btnToggleLight(View view) {
        //--------< btnToggleLight() >--------
        flashLightMain();
        //--------</ btnToggleLight() >--------
    }
    public void switchImpulses(View view) {
        flashLightMain();
    }
    //========</ #region: Buttons+Views >========


    //========< #region: Methods >========
    private  void flashLightMain(){
        //--------< flashLightMain() >--------


        if (_toggleButton.isChecked() ==true) {
            //----< Button==ON >----
            if (_switchImpuler.isChecked())
            {
                //--< Impulses >--
                start_flash_Impule_HIGH();
                //--</ Impulses >--
            }
            else
            {
                //--< Full >--
                setFlashLightON();
                //--</ Full >--
            }
            //----</ Button==ON >----
        }
        else
        {
            //----< Button==OFF >----
            setFlashLightOFF();
            set_FlashImpulses_OFF();
            //----</ Button==OFF >----
        }
        //--------</ flashLightMain() >--------
    }

    private void setFlashLightON()    {
        //--------< setFlashLightON() >--------
        //*switch Flash Light ON / OFF
        try {
                _flashIsOn = true;
                _CameraManager.setTorchMode(_CameraId, true);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
        //--------</ setFlashLightON() >--------
    }

    private void setFlashLightOFF()    {
        //--------< flashLightON() >--------
        //*switch Flash Light ON / OFF
        try {
            _flashIsOn = false;
            _CameraManager.setTorchMode(_CameraId, false);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
        //--------</ flashLightON() >--------
    }



    public void start_flash_Impule_HIGH()
    {
        //----< start_flash_Impule_HIGH() >----
        //< check >
        if (!_toggleButton.isChecked()) return;
        if (!_switchImpuler.isChecked()) return;


        Timer _timerPulsHIGH = new Timer();
        _timerPulsHIGH.schedule(new TimerTask() {
            @Override
            public void run()
            {
                try {
                    _flashIsOn = true;
                    _CameraManager.setTorchMode(_CameraId, true);
                    start_flash_Impule_LOW();
                }
                catch (CameraAccessException e) {
                    e.printStackTrace();
                }
            }
        }, _milliSedonds_LOW);
        //----</ Pstart_flash_Impule_HIGH() >--

    }

    public void start_flash_Impule_LOW()
    {
        //----< start_flash_Impule_LOW() >----
        Timer _timerPulsLOW = new Timer();
        _timerPulsLOW.schedule(new TimerTask() {
            @Override
            public void run()
            {
                try {
                    _flashIsOn = false;
                    _CameraManager.setTorchMode(_CameraId, false);
                    start_flash_Impule_HIGH();
                }
                catch (CameraAccessException e) {
                    e.printStackTrace();
                }

            }
        }, _milliSeconds_HIGH);

        //----</ start_flash_Impule_LOW() >--

    }


    private void set_FlashImpulses_OFF()
    {
        //--------< set_FlashImpulses_OFF() >--------
        //--< Flashlight OFF >--
        try {
            _CameraManager.setTorchMode(_CameraId, false);
            _flashIsOn = false;

        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
        //--</ Flashlight OFF >--
        //--------</ set_FlashImpulses_OFF() >--------
    }


    //========</ #region: Methods >========
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical"
    android:padding="44sp"
    >


    <ToggleButton
        android:id="@+id/btnToggleLight"
        android:layout_width="200sp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:onClick="btnToggleLight"

        />

    <Switch
        android:id="@+id/switchFlasher"
        android:layout_height="wrap_content"
        android:layout_width="200sp"
        android:layout_gravity="center_horizontal"
        android:layout_margin="10sp"
        android:text="@string/text_SwitchStrobo"
        android:onClick="switchImpulses"

        android:layout_marginBottom="44sp"
        tools:ignore="UseSwitchCompatOrMaterialXml"
        />


    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/text_Slider_high"
        android:textSize="16sp"
       
        android:layout_marginTop="33dp"
        />

    <SeekBar
        android:id="@+id/seekBarHIGH"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:progress="1000"
        android:max="1000"
        />

    <TextView
        android:layout_marginTop="11dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/text_Slider_low"
        android:textSize="16sp"
        />

    <SeekBar
        android:id="@+id/seekBarLOW"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:progress="1000"
        android:max="1000"
        />


</LinearLayout>

<uses-permission android:name="android.permission.FLASHLIGHT"/>