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/*
 * Portions of this code came from frameworks/base/core/java/android/view/ViewConfiguration.java,
 * which contains the following license text:
 *
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed 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 org.robolectric.shadows;

import android.content.Context;
import android.util.DisplayMetrics;
import android.view.ViewConfiguration;
import org.robolectric.Shadows;
import org.robolectric.annotation.Implementation;
import org.robolectric.annotation.Implements;
import org.robolectric.annotation.RealObject;
import org.robolectric.internal.Shadow;

/**
 * Shadow for {@link android.view.ViewConfiguration}.
 */
@SuppressWarnings({"UnusedDeclaration"})
@Implements(ViewConfiguration.class)
public class ShadowViewConfiguration {

  private static final int SCROLL_BAR_SIZE = 10;
  private static final int SCROLL_BAR_FADE_DURATION = 250;
  private static final int SCROLL_BAR_DEFAULT_DELAY = 300;
  private static final int FADING_EDGE_LENGTH = 12;
  private static final int PRESSED_STATE_DURATION = 125;
  private static final int LONG_PRESS_TIMEOUT = 500;
  private static final int GLOBAL_ACTIONS_KEY_TIMEOUT = 500;
  private static final int TAP_TIMEOUT = 115;
  private static final int JUMP_TAP_TIMEOUT = 500;
  private static final int DOUBLE_TAP_TIMEOUT = 300;
  private static final int ZOOM_CONTROLS_TIMEOUT = 3000;
  private static final int EDGE_SLOP = 12;
  private static final int TOUCH_SLOP = 16;
  private static final int PAGING_TOUCH_SLOP = TOUCH_SLOP * 2;
  private static final int DOUBLE_TAP_SLOP = 100;
  private static final int WINDOW_TOUCH_SLOP = 16;
  private static final int MINIMUM_FLING_VELOCITY = 50;
  private static final int MAXIMUM_FLING_VELOCITY = 4000;
  private static final int MAXIMUM_DRAWING_CACHE_SIZE = 320 * 480 * 4;
  private static final int OVERSCROLL_DISTANCE = 0;
  private static final int OVERFLING_DISTANCE = 4;
  private static final float SCROLL_FRICTION = 0.015f;

  private int edgeSlop;
  private int fadingEdgeLength;
  private int minimumFlingVelocity;
  private int maximumFlingVelocity;
  private int scrollbarSize;
  private int touchSlop;
  private int pagingTouchSlop;
  private int doubleTapSlop;
  private int windowTouchSlop;
  private boolean hasPermanentMenuKey = false;

  @RealObject
  private ViewConfiguration realViewConfiguration;

  private void setup(Context context) {
    DisplayMetrics metrics = context.getResources().getDisplayMetrics();
    float density = metrics.density;

    edgeSlop = (int) (density * EDGE_SLOP + 0.5f);
    fadingEdgeLength = (int) (density * FADING_EDGE_LENGTH + 0.5f);
    minimumFlingVelocity = (int) (density * MINIMUM_FLING_VELOCITY + 0.5f);
    maximumFlingVelocity = (int) (density * MAXIMUM_FLING_VELOCITY + 0.5f);
    scrollbarSize = (int) (density * SCROLL_BAR_SIZE + 0.5f);
    touchSlop = (int) (density * TOUCH_SLOP + 0.5f);
    pagingTouchSlop = (int) (density * PAGING_TOUCH_SLOP + 0.5f);
    doubleTapSlop = (int) (density * DOUBLE_TAP_SLOP + 0.5f);
    windowTouchSlop = (int) (density * WINDOW_TOUCH_SLOP + 0.5f);
  }

  @Implementation
  public static ViewConfiguration get(Context context) {
    ViewConfiguration viewConfiguration = Shadow.newInstanceOf(ViewConfiguration.class);
    Shadows.shadowOf(viewConfiguration).setup(context);
    return viewConfiguration;
  }

  @Implementation
  public static int getScrollBarSize() {
    return SCROLL_BAR_SIZE;
  }

  @Implementation
  public int getScaledScrollBarSize() {
    return scrollbarSize;
  }

  @Implementation
  public static int getScrollBarFadeDuration() {
    return SCROLL_BAR_FADE_DURATION;
  }

  @Implementation
  public static int getScrollDefaultDelay() {
    return SCROLL_BAR_DEFAULT_DELAY;
  }

  @Implementation
  public static int getFadingEdgeLength() {
    return FADING_EDGE_LENGTH;
  }

  @Implementation
  public int getScaledFadingEdgeLength() {
    return fadingEdgeLength;
  }

  @Implementation
  public static int getPressedStateDuration() {
    return PRESSED_STATE_DURATION;
  }

  @Implementation
  public static int getLongPressTimeout() {
    return LONG_PRESS_TIMEOUT;
  }

  @Implementation
  public static int getTapTimeout() {
    return TAP_TIMEOUT;
  }

  @Implementation
  public static int getJumpTapTimeout() {
    return JUMP_TAP_TIMEOUT;
  }

  @Implementation
  public static int getDoubleTapTimeout() {
    return DOUBLE_TAP_TIMEOUT;
  }

  @Implementation
  public static int getEdgeSlop() {
    return EDGE_SLOP;
  }

  @Implementation
  public int getScaledEdgeSlop() {
    return edgeSlop;
  }

  @Implementation
  public static int getTouchSlop() {
    return TOUCH_SLOP;
  }

  @Implementation
  public int getScaledTouchSlop() {
    return touchSlop;
  }

  @Implementation
  public int getScaledPagingTouchSlop() {
    return pagingTouchSlop;
  }

  @Implementation
  public int getScaledDoubleTapSlop() {
    return doubleTapSlop;
  }

  @Implementation
  public static int getWindowTouchSlop() {
    return WINDOW_TOUCH_SLOP;
  }

  @Implementation
  public int getScaledWindowTouchSlop() {
    return windowTouchSlop;
  }

  @Implementation
  public static int getMinimumFlingVelocity() {
    return MINIMUM_FLING_VELOCITY;
  }

  @Implementation
  public int getScaledMinimumFlingVelocity() {
    return minimumFlingVelocity;
  }

  @Implementation
  public static int getMaximumFlingVelocity() {
    return MAXIMUM_FLING_VELOCITY;
  }

  @Implementation
  public int getScaledMaximumFlingVelocity() {
    return maximumFlingVelocity;
  }

  @Implementation
  public static int getMaximumDrawingCacheSize() {
    return MAXIMUM_DRAWING_CACHE_SIZE;
  }

  @Implementation
  public static long getZoomControlsTimeout() {
    return ZOOM_CONTROLS_TIMEOUT;
  }

  @Implementation
  public static long getGlobalActionKeyTimeout() {
    return GLOBAL_ACTIONS_KEY_TIMEOUT;
  }

  @Implementation
  public static float getScrollFriction() {
    return SCROLL_FRICTION;
  }

  @Implementation
  public boolean hasPermanentMenuKey() {
    return hasPermanentMenuKey;
  }

  public void setHasPermanentMenuKey(boolean value) {
    this.hasPermanentMenuKey = value;
  }
}