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/*
 * Copyright 2014, Leanplum, Inc. All rights reserved.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.leanplum.utils;

import android.app.Activity;
import android.content.Context;
import android.graphics.Point;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.WindowManager;

/**
 * Utilities for converting between different size units.
 *
 * @author Martin Yanakiev
 */
public class SizeUtil {
  public static int dp2;
  public static int dp30;
  public static int dp5;
  public static int dp20;
  public static int dp18;
  public static int dp16;
  public static int dp14;
  public static int dp10;
  public static int dp7;
  public static int dp100;
  public static int dp200;
  public static int dp250;
  public static int dp50;

  public static final int textSize0_2 = 16;
  public static final int textSize0_1 = 18;
  public static final int textSize0 = 20;
  public static final int textSize1 = 22;
  public static final int textSize2 = 24;

  private static boolean hasInited = false;

  public static void init(Context context) {
    if (hasInited) {
      return;
    }
    hasInited = true;
    dp30 = dpToPx(context, 30);
    dp5 = dpToPx(context, 5);
    dp20 = dpToPx(context, 20);
    dp10 = dpToPx(context, 10);
    dp7 = dpToPx(context, 7);
    dp18 = dpToPx(context, 18);
    dp16 = dpToPx(context, 16);
    dp14 = dpToPx(context, 14);
    dp100 = dpToPx(context, 100);
    dp200 = dpToPx(context, 200);
    dp250 = dpToPx(context, 250);
    dp2 = dpToPx(context, 2);
    dp50 = dpToPx(context, 50);
  }

  public static int dpToPx(Context context, int dp) {
    init(context);
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    return Math.round(dp
        * (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
  }

  public static int pxToDp(Context context, int px) {
    init(context);
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    return Math.round(px
        / (displayMetrics.xdpi / DisplayMetrics.DENSITY_DEFAULT));
  }

  public static int spToPx(Context context, int sp) {
    init(context);
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    return (int) (sp * displayMetrics.scaledDensity);
  }

  public static int pxToSp(Context context, int px) {
    init(context);
    DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
    return (int) (px / displayMetrics.scaledDensity);
  }

  public static int getStatusBarHeight(Activity activity) {
    init(activity);
    boolean full = (activity.getWindow().getAttributes().flags & WindowManager.LayoutParams.FLAG_FULLSCREEN) == WindowManager.LayoutParams.FLAG_FULLSCREEN;
    if (full) {
      return 0;
    }
    int result = 0;
    int resourceId = activity.getResources().getIdentifier("status_bar_height",
        "dimen", "android");
    if (resourceId > 0) {
      result = activity.getResources().getDimensionPixelSize(resourceId);
    }
    return result;
  }

  public static int getStatusBarHeight(Context context) {
    init(context);
    int result = 0;
    try {
      int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
      if (resourceId > 0) {
        result = context.getResources().getDimensionPixelSize(resourceId);
      }
    } catch (Throwable ignored) {
    }
    return result;
  }

  /**
   * Gets the size of display in pixels.
   *
   * @param context Current activity.
   * @return A Point object with display size information.
   */
  public static Point getDisplaySize(Activity context) {
    Point size = new Point();
    if (context == null) {
      return size;
    }
    try {
      Display display = context.getWindowManager().getDefaultDisplay();
      display.getSize(size);
    } catch (Throwable ignored) {
    }
    return size;
  }
}