package com.mayank.rucky;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.PagerAdapter;
import androidx.viewpager.widget.ViewPager;

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


public class InitActivity extends AppCompatActivity {

    public static final String PREF_SETTINGS = "settings";
    public static final String PREF_SETTINGS_INIT = "init";
    private ViewPager viewPager;
    private LinearLayout dotsLayout;
    private int[] layouts;
    private Button btnSkip, btnNext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, WindowManager.LayoutParams.FLAG_SECURE);
        setTheme(R.style.AppThemeDark);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        hideNavigationBar();

        setContentView(R.layout.activity_init);

        viewPager = findViewById(R.id.view_pager);
        dotsLayout = findViewById(R.id.layoutDots);
        btnSkip = findViewById(R.id.btn_skip);
        btnNext = findViewById(R.id.btn_next);

        layouts = new int[]{
                R.layout.slide1,
                R.layout.slide2,
                R.layout.slide3
        };

        addBottomDots(0);

        MyViewPagerAdapter myViewPagerAdapter = new MyViewPagerAdapter();
        viewPager.setAdapter(myViewPagerAdapter);
        viewPager.addOnPageChangeListener(viewPagerPageChangeListener);

        btnSkip.setOnClickListener(v -> launchHomeScreen());

        btnNext.setOnClickListener(v -> {
            // checking for last page
            // if last page home screen will be launched
            int current = getItem();
            if (current < layouts.length) {
                // move to next screen
                viewPager.setCurrentItem(current);
            } else {
                launchHomeScreen();
            }
        });
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        hideNavigationBar();
    }

    public void hideNavigationBar() {
        final View decorView = this.getWindow().getDecorView();
        final int uiOptions =
                View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        | View.SYSTEM_UI_FLAG_IMMERSIVE
                        | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;

        Timer timer = new Timer();
        TimerTask task = new TimerTask() {
            @Override
            public void run() {
                InitActivity.this.runOnUiThread(() -> decorView.setSystemUiVisibility(uiOptions));
            }
        };
        timer.scheduleAtFixedRate(task, 1, 2);

    }

    private void addBottomDots(int currentPage) {
        TextView[] dots = new TextView[layouts.length];

        int[] colorsActive = getResources().getIntArray(R.array.array_dot_active);
        int[] colorsInactive = getResources().getIntArray(R.array.array_dot_inactive);

        dotsLayout.removeAllViews();
        for (int i = 0; i < dots.length; i++) {
            dots[i] = new TextView(this);
            dots[i].setText(Html.fromHtml("&#8226;"));
            dots[i].setTextSize(35);
            dots[i].setTextColor(colorsInactive[currentPage]);
            dotsLayout.addView(dots[i]);
        }

        if (dots.length > 0)
            dots[currentPage].setTextColor(colorsActive[currentPage]);
    }

    private int getItem() {
        return viewPager.getCurrentItem() + 1;
    }

    private void launchHomeScreen() {
        SharedPreferences.Editor editor = getSharedPreferences(PREF_SETTINGS,MODE_PRIVATE).edit();
        editor.putBoolean(PREF_SETTINGS_INIT, false).apply();
        startActivity(new Intent(InitActivity.this, MainActivity.class));
        finish();
    }

    ViewPager.OnPageChangeListener viewPagerPageChangeListener = new ViewPager.OnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            addBottomDots(position);

            if (position == layouts.length - 1) {
                // last page. make button text to GOT IT
                btnNext.setText(getString(R.string.init_start));
                btnSkip.setVisibility(View.GONE);
            } else {
                btnNext.setText(getString(R.string.init_next));
                btnSkip.setVisibility(View.VISIBLE);
            }
        }

        @Override
        public void onPageScrolled(int position, float arg1, int arg2) {}

        @Override
        public void onPageScrollStateChanged(int arg0) {}
    };

    public class MyViewPagerAdapter extends PagerAdapter {
        private LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        MyViewPagerAdapter() {
        }

        @NonNull
        @Override
        public Object instantiateItem(@NonNull ViewGroup container, int position) {
            assert layoutInflater != null;
            View view = layoutInflater.inflate(layouts[position], container, false);
            container.addView(view);

            return view;
        }

        @Override
        public int getCount() {
            return layouts.length;
        }

        @Override
        public boolean isViewFromObject(@NonNull View view, @NonNull Object obj) {
            return view == obj;
        }


        @Override
        public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
            View view = (View) object;
            container.removeView(view);
        }
    }
}