package info.nightscout.androidaps.startupwizard;

import android.annotation.SuppressLint;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RadioGroup;
import android.widget.TextView;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;

import info.nightscout.androidaps.MainActivity;
import info.nightscout.androidaps.MainApp;
import info.nightscout.androidaps.R;
import info.nightscout.androidaps.events.EventRefreshGui;
import info.nightscout.utils.LocaleHelper;
import info.nightscout.utils.SP;

import static info.nightscout.androidaps.startupwizard.SWItem.Type.RADIOBUTTON;
import static info.nightscout.androidaps.startupwizard.SWItem.Type.STRING;
import static info.nightscout.androidaps.startupwizard.SWItem.Type.URL;

/**
 * An example full-screen activity that shows and hides the system UI (i.e.
 * status bar and navigation/system bar) with user interaction.
 */
public class SetupWizardActivity extends AppCompatActivity {
    /**
     * Whether or not the system UI should be auto-hidden after
     * {@link #AUTO_HIDE_DELAY_MILLIS} milliseconds.
     */
    private static final boolean AUTO_HIDE = false;

    /**
     * If {@link #AUTO_HIDE} is set, the number of milliseconds to wait after
     * user interaction before hiding the system UI.
     */
    private static final int AUTO_HIDE_DELAY_MILLIS = 3000;

    /**
     * Some older devices needs a small delay between UI widget updates
     * and a change of the status and navigation bar.
     */
    private static final int UI_ANIMATION_DELAY = 300;
    private final Handler mHideHandler = new Handler();
    private View mContentView;
    private LinearLayout linearLayout;
    private TextView radioLabel;
    private int numberOfButtons = 0;
    private List<String> labels = new ArrayList<String>();
    private List<String> comments = new ArrayList<String>();

    private LinearLayout layout;
    private TextView textlabel;
    private TextView screenName;
    private Button skipButton;
    //logiing
    private static Logger log = LoggerFactory.getLogger(SetupWizardActivity.class);
    private static SetupWizardActivity mWizardActivity;
    private int currentWizardPage = 0;
    public static final String INTENT_MESSAGE = "WIZZARDPAGE";
    private final Runnable mHidePart2Runnable = new Runnable() {
        @SuppressLint("InlinedApi")
        @Override
        public void run() {
            // Delayed removal of status and navigation bar

            // Note that some of these constants are new as of API 16 (Jelly Bean)
            // and API 19 (KitKat). It is safe to use them, as they are inlined
            // at compile-time and do nothing on earlier devices.
            mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
        }
    };
    private View mControlsView;
    private final Runnable mShowPart2Runnable = new Runnable() {
        @Override
        public void run() {
            // Delayed display of UI elements
            ActionBar actionBar = getSupportActionBar();
            if (actionBar != null) {
                actionBar.show();
            }
            mControlsView.setVisibility(View.VISIBLE);
        }
    };
    private boolean mVisible;
    private final Runnable mHideRunnable = new Runnable() {
        @Override
        public void run() {
            hide();
        }
    };
    /**
     * Touch listener to use for in-layout UI controls to delay hiding the
     * system UI. This is to prevent the jarring behavior of controls going away
     * while interacting with activity UI.
     */
    private final View.OnTouchListener mDelayHideTouchListener = new View.OnTouchListener() {
        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
            if (AUTO_HIDE) {
                delayedHide(AUTO_HIDE_DELAY_MILLIS);
            }
            return false;
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setupwizard);
        mWizardActivity = this;
        mVisible = true;
        mControlsView = findViewById(R.id.fullscreen_content_controls);
        mContentView = findViewById(R.id.fullscreen_content);


        // Set up the user interaction to manually show or hide the system UI.
        mContentView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                toggle();
            }
        });


        Intent intent = getIntent();
        int showPage = intent.getIntExtra(SetupWizardActivity.INTENT_MESSAGE,0);
        SWDefinition swDefinition = SWDefinition.getInstance();
        List<SWScreen> screens = swDefinition.getScreens();
        if(screens.size() > 0 && showPage < screens.size()){
            SWScreen currentScreen = screens.get(showPage);
            currentWizardPage = showPage;
            // show/hide prev/next buttons if we are at the beninning/end
            //showNextButton(showPage, screens.size()-1);

            if(showPage == 0)
                ((Button) findViewById(R.id.previous_button)).setVisibility(View.GONE);
            //Set screen name
            screenName = (TextView) findViewById(R.id.fullscreen_content);
            screenName.setText(currentScreen.getHeader());
            //Display screen items in the order entered
            linearLayout = (LinearLayout) findViewById(R.id.fullscreen_content_controls);
            // is it skippable ?
            if(currentScreen.skippable) {
                //display skip button
                skipButton = (Button) findViewById(R.id.skip_button);

            }
            //Generate layout first
            LinearLayout layout = info.nightscout.androidaps.startupwizard.SWItem.generateLayout(this.findViewById(R.id.fullscreen_content_fields));
            for(int i = 0; i < currentScreen.items.size(); i++){
                SWItem currentItem = currentScreen.items.get(i);
                labels.add(i,currentItem.getLabel());
                comments.add(i,currentItem.getComment());
                currentItem.setOptions(labels, comments);
                currentItem.generateDialog(this.findViewById(R.id.fullscreen_content_fields), layout);
            }
            // Check if input isValid or screen is sckippable
            if(currentScreen.validator.isValid() || currentScreen.skippable) {
                showNextButton(showPage, screens.size() - 1);
                show();
            }

        }

        // Upon interacting with UI controls, delay any scheduled hide()
        // operations to prevent the jarring behavior of controls going away
        // while interacting with the UI.
        findViewById(R.id.next_button).setOnTouchListener(mDelayHideTouchListener);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);

        // Trigger the initial hide() shortly after the activity has been
        // created, to briefly hint to the user that UI controls
        // are available.
        delayedHide(100);
    }

    @Override
    protected void onResume() {

        super.onResume();
        // check is current locale is different from the one in preferences
//        log.debug("Current: "+LocaleHelper.getLanguage(this)+" preferences: "+SP.getString("language", "en"));
        if(!LocaleHelper.getLanguage(this).equals(SP.getString("language", "en"))) {
            // it is so change it in locale and restart SetupWizard
//            log.debug("Setting locale to: "+SP.getString("language", "en")+" and restarting");
            LocaleHelper.setLocale(this, SP.getString(R.string.key_language, "en"));
            MainApp.bus().post(new EventRefreshGui(true));
            Intent intent = getIntent();
            this.finish();
            startActivity(intent);
        }
    }

    private void toggle() {
        if (mVisible) {
            hide();
        } else {
            show();
        }
    }

    private void hide() {
        // Hide UI first
        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.hide();
        }
        mControlsView.setVisibility(View.VISIBLE);
        mVisible = true;

        // Schedule a runnable to remove the status and navigation bar after a delay
        mHideHandler.removeCallbacks(mShowPart2Runnable);
        mHideHandler.postDelayed(mHidePart2Runnable, UI_ANIMATION_DELAY);
    }

    @SuppressLint("InlinedApi")
    private void show() {
        // Show the system bar
        mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
        mVisible = true;

        // Schedule a runnable to display UI elements after a delay
        mHideHandler.removeCallbacks(mHidePart2Runnable);
        mHideHandler.postDelayed(mShowPart2Runnable, UI_ANIMATION_DELAY);
    }

    /**
     * Schedules a call to hide() in delay milliseconds, canceling any
     * previously scheduled calls.
     */
    private void delayedHide(int delayMillis) {
        mHideHandler.removeCallbacks(mHideRunnable);
        mHideHandler.postDelayed(mHideRunnable, delayMillis);
    }

    private void showNextButton(int currentPage, int maxPages){
        if(currentPage == maxPages) {
            ((Button) findViewById(R.id.finish_button)).setVisibility(View.VISIBLE);
            ((Button) findViewById(R.id.next_button)).setVisibility(View.GONE);
        } else
            ((Button) findViewById(R.id.next_button)).setVisibility(View.VISIBLE);
        show();
    }

    public void showNextPage(View view) {
        Intent intent = new Intent(this, SetupWizardActivity.class);
        intent.putExtra(INTENT_MESSAGE, currentWizardPage + 1);
        startActivity(intent);
    }

    public void showPreviousPage(View view) {
        Intent intent = new Intent(this, SetupWizardActivity.class);
        if(currentWizardPage > 0)
            intent.putExtra(INTENT_MESSAGE, currentWizardPage - 1);
        else
            intent.putExtra(INTENT_MESSAGE, 0);
        startActivity(intent);
    }

    // Go back to overview
    public void finishSetupWizard(View view){
        // restart app
        Context context = getApplicationContext();
        Intent mStartActivity = new Intent(context, MainActivity.class);
        int mPendingIntentId = 123456;
        PendingIntent mPendingIntent = PendingIntent.getActivity(context, mPendingIntentId,    mStartActivity, PendingIntent.FLAG_CANCEL_CURRENT);
        AlarmManager mgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 100, mPendingIntent);
        System.exit(0);
    }

    public static SetupWizardActivity instance(){
        return mWizardActivity;
    }

}