/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * 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 com.intellij.ui;

import com.intellij.openapi.application.Application;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.openapi.application.ApplicationNamesInfo;
import com.intellij.openapi.application.ex.ApplicationInfoEx;
import com.intellij.openapi.application.impl.ApplicationInfoImpl;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.ui.popup.Balloon;
import com.intellij.openapi.util.Condition;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.openapi.util.registry.Registry;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.openapi.wm.ToolWindowManager;
import com.intellij.util.PlatformUtils;
import com.intellij.util.ReflectionUtil;
import com.intellij.util.containers.ContainerUtil;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.awt.*;
import java.io.File;
import java.io.InputStream;
import java.net.URL;
import java.util.List;
import java.util.Locale;

/**
 * @author yole
 */
public class AppUIUtil {
  private static final String VENDOR_PREFIX = "jetbrains-";

  public static void updateWindowIcon(@NotNull Window window) {
    window.setIconImages(getAppIconImages());
  }

  @SuppressWarnings({"UnnecessaryFullyQualifiedName", "deprecation"})
  private static List<Image> getAppIconImages() {
    ApplicationInfoEx appInfo = ApplicationInfoImpl.getShadowInstance();
    List<Image> images = ContainerUtil.newArrayListWithCapacity(3);

    if (SystemInfo.isXWindow) {
      String bigIconUrl = appInfo.getBigIconUrl();
      if (bigIconUrl != null) {
        images.add(com.intellij.util.ImageLoader.loadFromResource(bigIconUrl));
      }
    }

    images.add(com.intellij.util.ImageLoader.loadFromResource(appInfo.getIconUrl()));
    images.add(com.intellij.util.ImageLoader.loadFromResource(appInfo.getSmallIconUrl()));

    return images;
  }

  public static void invokeLaterIfProjectAlive(@NotNull final Project project, @NotNull final Runnable runnable) {
    final Application application = ApplicationManager.getApplication();
    if (application.isDispatchThread()) {
      runnable.run();
    }
    else {
      application.invokeLater(runnable, new Condition() {
        @Override
        public boolean value(Object o) {
          return !project.isOpen() || project.isDisposed();
        }
      });
    }
  }

  public static void invokeOnEdt(Runnable runnable) {
    invokeOnEdt(runnable, null);
  }

  public static void invokeOnEdt(Runnable runnable, @Nullable Condition condition) {
    Application application = ApplicationManager.getApplication();
    if (application.isDispatchThread()) {
      //noinspection unchecked
      if (condition == null || !condition.value(null)) {
        runnable.run();
      }
    }
    else if (condition == null) {
      application.invokeLater(runnable);
    }
    else {
      application.invokeLater(runnable, condition);
    }
  }

  public static void updateFrameClass() {
    try {
      final Toolkit toolkit = Toolkit.getDefaultToolkit();
      final Class<? extends Toolkit> aClass = toolkit.getClass();
      if ("sun.awt.X11.XToolkit".equals(aClass.getName())) {
        ReflectionUtil.setField(aClass, toolkit, null, "awtAppClassName", getFrameClass());
      }
    }
    catch (Exception ignore) { }
  }

  public static String getFrameClass() {
    String name = ApplicationNamesInfo.getInstance().getProductName().toLowerCase(Locale.US);
    String wmClass = VENDOR_PREFIX + StringUtil.replaceChar(name, ' ', '-');
    if ("true".equals(System.getProperty("idea.debug.mode"))) {
      wmClass += "-debug";
    }
    return PlatformUtils.isCommunityEdition() ? wmClass + "-ce" : wmClass;
  }

  public static void registerBundledFonts() {
    if (Registry.is("ide.register.bundled.fonts")) {
      registerFont("/fonts/Inconsolata.ttf");
      registerFont("/fonts/SourceCodePro-Regular.ttf");
      registerFont("/fonts/SourceCodePro-Bold.ttf");
    }
  }

  private static void registerFont(@NonNls String name) {
    URL url = AppUIUtil.class.getResource(name);
    if (url == null) {
      Logger.getInstance(AppUIUtil.class).warn("Resource missing: " + name);
      return;
    }

    try {
      InputStream is = url.openStream();
      try {
        Font font = Font.createFont(Font.TRUETYPE_FONT, is);
        GraphicsEnvironment.getLocalGraphicsEnvironment().registerFont(font);
      }
      finally {
        is.close();
      }
    }
    catch (Throwable t) {
      Logger.getInstance(AppUIUtil.class).warn("Cannot register font: " + url, t);
    }
  }

  public static void hideToolWindowBalloon(@NotNull final String id, @NotNull final Project project) {
    invokeLaterIfProjectAlive(project, new Runnable() {
      @Override
      public void run() {
        Balloon balloon = ToolWindowManager.getInstance(project).getToolWindowBalloon(id);
        if (balloon != null) {
          balloon.hide();
        }
      }
    });
  }

  @SuppressWarnings("UnusedDeclaration")
  @Deprecated
  /**
   * to remove in IDEA 14
   */
  public static JTextField createUndoableTextField() {
    return GuiUtils.createUndoableTextField();
  }

  private static final int MIN_ICON_SIZE = 32;

  @Nullable
  public static String findIcon(final String iconsPath) {
    final File iconsDir = new File(iconsPath);

    // 1. look for .svg icon
    for (String child : iconsDir.list()) {
      if (child.endsWith(".svg")) {
        return iconsPath + '/' + child;
      }
    }

    // 2. look for .png icon of max size
    int max = 0;
    String iconPath = null;
    for (String child : iconsDir.list()) {
      if (!child.endsWith(".png")) continue;
      final String path = iconsPath + '/' + child;
      final Icon icon = new ImageIcon(path);
      final int size = icon.getIconHeight();
      if (size >= MIN_ICON_SIZE && size > max && size == icon.getIconWidth()) {
        max = size;
        iconPath = path;
      }
    }

    return iconPath;
  }
}