package se.leap.bitmaskclient;

import android.content.SharedPreferences;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.DrawableRes;
import android.support.annotation.Nullable;
import android.support.annotation.StringRes;
import android.support.constraint.ConstraintLayout;
import android.support.constraint.Guideline;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.AppCompatTextView;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.LinearLayout;
import android.widget.ProgressBar;

import butterknife.InjectView;
import butterknife.Optional;
import se.leap.bitmaskclient.views.ProviderHeaderView;

import static android.content.res.Configuration.ORIENTATION_LANDSCAPE;
import static android.view.View.GONE;
import static android.view.View.VISIBLE;
import static se.leap.bitmaskclient.Constants.PROVIDER_KEY;
import static se.leap.bitmaskclient.Constants.SHARED_PREFERENCES;

/**
 * Base Activity for configuration wizard activities
 *
 * Created by fupduck on 09.01.18.
 */

public abstract class ConfigWizardBaseActivity extends ButterKnifeActivity {

    private static final String TAG = ConfigWizardBaseActivity.class.getName();
    public static final float GUIDE_LINE_COMPACT_DELTA = 0.1f;
    protected SharedPreferences preferences;

    @InjectView(R.id.header)
    ProviderHeaderView providerHeaderView;

    //Add provider screen has no loading screen
    @Optional
    @InjectView(R.id.loading_screen)
    protected LinearLayout loadingScreen;

    @Optional
    @InjectView(R.id.progressbar)
    protected ProgressBar progressBar;

    @Optional
    @InjectView(R.id.progressbar_description)
    protected AppCompatTextView progressbarText;

    //Only tablet layouts have guidelines as they are based on a ConstraintLayout
    @Optional
    @InjectView(R.id.guideline_top)
    protected Guideline guideline_top;

    @Optional
    @InjectView(R.id.guideline_bottom)
    protected Guideline guideline_bottom;

    @InjectView(R.id.content)
    protected LinearLayout content;

    protected Provider provider;

    protected boolean isCompactLayout = false;
    protected boolean isActivityShowing;

    private float defaultGuidelineTopPercentage;
    private float defaultGuidelineBottomPercentage;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        preferences = getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
        provider = getIntent().getParcelableExtra(PROVIDER_KEY);
    }

    @Override
    public void setContentView(View view) {
        super.setContentView(view);
        initContentView();
    }

    @Override
    public void setContentView(int layoutResID) {
        super.setContentView(layoutResID);
        initContentView();
    }

    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
        super.setContentView(view, params);
        initContentView();
    }

    private void initContentView() {
        if (provider != null) {
            setProviderHeaderText(provider.getName());
        }
        setProgressbarColorForPreLollipop();
        setDefaultGuidelineValues();
        setGlobalLayoutChangeListener();
    }

    private void setDefaultGuidelineValues() {
        if (isTabletLayout()) {
            defaultGuidelineTopPercentage = ((ConstraintLayout.LayoutParams) guideline_top.getLayoutParams()).guidePercent;
            defaultGuidelineBottomPercentage = ((ConstraintLayout.LayoutParams) guideline_bottom.getLayoutParams()).guidePercent;
        }
    }

    private void setProgressbarColorForPreLollipop() {
        if (progressBar == null || Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            return;
        }
        progressBar.getIndeterminateDrawable().setColorFilter(
                ContextCompat.getColor(this, R.color.colorPrimary),
                PorterDuff.Mode.SRC_IN);
    }


    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (provider != null) {
            outState.putParcelable(PROVIDER_KEY, provider);
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        isActivityShowing = false;
    }

    @Override
    protected void onResume() {
        super.onResume();
        isActivityShowing = true;
    }

    protected void restoreState(Bundle savedInstanceState) {
        if (savedInstanceState != null && savedInstanceState.containsKey(PROVIDER_KEY)) {
            provider = savedInstanceState.getParcelable(PROVIDER_KEY);
        }
    }

    protected void setProviderHeaderLogo(@DrawableRes int providerHeaderLogo) {
        providerHeaderView.setLogo(providerHeaderLogo);
    }

    protected void setProviderHeaderText(String providerHeaderText) {
        providerHeaderView.setTitle(providerHeaderText);
    }

    protected void setProviderHeaderText(@StringRes int providerHeaderText) {
        providerHeaderView.setTitle(providerHeaderText);
    }

    protected void hideProgressBar() {
        if (loadingScreen == null) {
            return;
        }
        loadingScreen.setVisibility(GONE);
        content.setVisibility(VISIBLE);
    }

    protected void showProgressBar() {
        if (loadingScreen == null) {
            return;
        }
        content.setVisibility(GONE);
        loadingScreen.setVisibility(VISIBLE);
    }

    protected void setProgressbarText(@StringRes int progressbarText) {
        if (this.progressbarText == null) {
            return;
        }
        this.progressbarText.setText(progressbarText);
    }


    protected void showCompactLayout() {
        if (isCompactLayout) {
            return;
        }

        if (isTabletLayoutInLandscape() || isPhoneLayout()) {
            providerHeaderView.showCompactLayout();
        }

        showIncreasedTabletContentArea();
        isCompactLayout = true;
    }

    protected void showStandardLayout() {
        if (!isCompactLayout) {
            return;
        }
        providerHeaderView.showStandardLayout();
        showStandardTabletContentArea();
        isCompactLayout = false;
    }

    private boolean isTabletLayoutInLandscape() {
        // TabletLayout is based on a ConstraintLayout and uses Guidelines whereas the phone layout
        // has no such elements in it's layout xml file
        return  guideline_top != null &&
                guideline_bottom != null &&
                getResources().getConfiguration().orientation == ORIENTATION_LANDSCAPE;
    }

    protected boolean isPhoneLayout() {
        return guideline_top == null && guideline_bottom == null;
    }

    protected boolean isTabletLayout() {
        return guideline_top != null && guideline_bottom != null;
    }

    /**
     * Increases the white content area in tablet layouts
     */
    private void showIncreasedTabletContentArea() {
        if (isPhoneLayout()) {
            return;
        }
        ConstraintLayout.LayoutParams guideLineTopParams = (ConstraintLayout.LayoutParams) guideline_top.getLayoutParams();
        float increasedTopPercentage = defaultGuidelineTopPercentage - GUIDE_LINE_COMPACT_DELTA;
        guideLineTopParams.guidePercent = increasedTopPercentage > 0f ? increasedTopPercentage : 0f;
        guideline_top.setLayoutParams(guideLineTopParams);

        ConstraintLayout.LayoutParams guideLineBottomParams = (ConstraintLayout.LayoutParams) guideline_bottom.getLayoutParams();
        float increasedBottomPercentage = defaultGuidelineBottomPercentage + GUIDE_LINE_COMPACT_DELTA;
        guideLineBottomParams.guidePercent = increasedBottomPercentage < 1f ? increasedBottomPercentage : 1f;
        guideline_bottom.setLayoutParams(guideLineBottomParams);
    }

    /**
     * Restores the default size of the white content area in tablet layouts
     */
    private void showStandardTabletContentArea() {
        if (isPhoneLayout()) {
            return;
        }
        ConstraintLayout.LayoutParams guideLineTopParams = (ConstraintLayout.LayoutParams) guideline_top.getLayoutParams();
        guideLineTopParams.guidePercent = defaultGuidelineTopPercentage;
        guideline_top.setLayoutParams(guideLineTopParams);

        ConstraintLayout.LayoutParams guideLineBottomParams = (ConstraintLayout.LayoutParams) guideline_bottom.getLayoutParams();
        guideLineBottomParams.guidePercent = defaultGuidelineBottomPercentage;
        guideline_bottom.setLayoutParams(guideLineBottomParams);
    }

    /**
     * Checks if the keyboard is shown and switches between the standard layout and the compact layout
     */
    private void setGlobalLayoutChangeListener() {
        final View rootView = content.getRootView();
        rootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect r = new Rect();
                //r will be populated with the coordinates of your view that area still visible.
                rootView.getWindowVisibleDisplayFrame(r);

                float deltaHiddenScreen =  1f - ((float) (r.bottom - r.top) / (float) rootView.getHeight());
                if (deltaHiddenScreen > 0.25f) {
                    // if more than 1/4 of the screen is hidden
                    showCompactLayout();
                } else {
                    showStandardLayout();
                }
            }
        });
    }

}