/**
 * Wire
 * Copyright (C) 2016 Wire Swiss GmbH
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.waz.zclient.ui.utils;

import android.app.Activity;
import android.content.Context;
import android.graphics.Rect;
import android.os.IBinder;
import android.view.View;
import android.view.inputmethod.InputMethodManager;

public class KeyboardUtils {

    private KeyboardUtils() {
    }

    public static boolean isKeyboardVisible(Context context) {
        return getInputMethodManager(context).isActive();
    }

    public static void closeKeyboardIfShown(Activity activity) {
        if (isKeyboardVisible(activity)) {
            hideKeyboard(activity);
        }
    }

    public static boolean keyboardIsVisible(View contentView) {
        Rect r = new Rect();
        contentView.getWindowVisibleDisplayFrame(r);
        int screenHeight = contentView.getRootView().getHeight();
        int keyboardHeight = screenHeight - r.bottom;
        return keyboardHeight > 0;
    }

    public static void hideKeyboard(Context context, IBinder token) {
        InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(token, 0);
    }

    public static void hideKeyboard(Activity activity) {
        if (activity.getCurrentFocus() != null) {
            getInputMethodManager(activity).hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
        }
    }

    public static boolean showKeyboard(Activity activity) {
        if (activity != null && activity.getCurrentFocus() != null) {
            getInputMethodManager(activity).showSoftInput(activity.getCurrentFocus(), InputMethodManager.SHOW_IMPLICIT);
            return true;
        }
        return false;
    }


    private static InputMethodManager getInputMethodManager(Context context) {
        return (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
    }

    public static int getKeyboardHeight(View contentView) {
        Rect r = new Rect();
        contentView.getWindowVisibleDisplayFrame(r);
        int screenHeight = contentView.getRootView().getHeight();
        return screenHeight - r.bottom;
    }
}