/*
 * Copyright 2000-2009 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.openapi.util;

import com.intellij.openapi.util.text.StringUtil;

@SuppressWarnings({"HardCodedStringLiteral", "UtilityClassWithoutPrivateConstructor"})
public class SystemInfo {
  private static final String OS_NAME = System.getProperty("os.name").toLowerCase();
  public static final String OS_VERSION = System.getProperty("os.version").toLowerCase();
  public static final String OS_ARCH = System.getProperty("os.arch");
  public static final String JAVA_VERSION = System.getProperty("java.version");
  public static final String JAVA_RUNTIME_VERSION = System.getProperty("java.runtime.version");
  public static final String ARCH_DATA_MODEL = System.getProperty("sun.arch.data.model");
  public static final String SUN_DESKTOP = System.getProperty("sun.desktop");

  public static final boolean isWindows = OS_NAME.startsWith("windows");
  public static final boolean isWindowsNT = OS_NAME.startsWith("windows nt");
  public static final boolean isWindows2000 = OS_NAME.startsWith("windows 2000");
  public static final boolean isWindows2003 = OS_NAME.startsWith("windows 2003");
  public static final boolean isWindowsXP = OS_NAME.startsWith("windows xp");
  public static final boolean isWindowsVista = OS_NAME.startsWith("windows vista");
  public static final boolean isWindows7 = OS_NAME.startsWith("windows 7");
  public static final boolean isWindows9x = OS_NAME.startsWith("windows 9") || OS_NAME.startsWith("windows me");
  public static final boolean isOS2 = OS_NAME.startsWith("os/2") || OS_NAME.startsWith("os2");
  public static final boolean isMac = OS_NAME.startsWith("mac");
  public static final boolean isFreeBSD = OS_NAME.startsWith("freebsd");
  public static final boolean isLinux = OS_NAME.startsWith("linux");
  public static final boolean isUnix = !isWindows && !isOS2;

  public static final boolean isKDE = SUN_DESKTOP != null && SUN_DESKTOP.toLowerCase().indexOf("kde") >= 0;
  public static final boolean isGnome = SUN_DESKTOP != null && SUN_DESKTOP.toLowerCase().indexOf("gnome") >= 0;

  public static final boolean isMacSystemMenu = isMac && "true".equals(System.getProperty("apple.laf.useScreenMenuBar"));

  public static final boolean isFileSystemCaseSensitive = !isWindows && !isOS2 && !isMac;


  public static final boolean is32Bit = ARCH_DATA_MODEL == null || ARCH_DATA_MODEL.equals("32");
  public static final boolean is64Bit = !is32Bit;
  public static final boolean isAMD64 = "amd64".equals(OS_ARCH);

  /**
   * Whether IDEA is running under MacOS X version 10.4 or later.
   *
   * @since 5.0.2
   */
  public static final boolean isMacOSTiger = isTiger();


  /**
   * Whether IDEA is running under MacOS X on an Intel Machine
   *
   * @since 5.0.2
   */
  public static final boolean isIntelMac = isIntelMac();

  /**
   * Running under MacOS X version 10.5 or later;
   *
   * @since 7.0.2
   */
  public static final boolean isMacOSLeopard = isLeopard();

  /**
   * Running under MacOS X version 10.6 or later;
   *
   * @since 9.0
   */
  public static final boolean isMacOSSnowLeopard = isSnowLeopard();

  /**
   * Operating system is supposed to have middle mouse button click occupied by paste action.
   * @since 6.0
   */
  public static boolean X11PasteEnabledSystem = isUnix && !isMac;

  private static boolean isTiger() {
    return isMac &&
           !OS_VERSION.startsWith("10.0") &&
           !OS_VERSION.startsWith("10.1") &&
           !OS_VERSION.startsWith("10.2") &&
           !OS_VERSION.startsWith("10.3");
  }

  private static boolean isIntelMac() {
    return isMac && "i386".equals(OS_ARCH);
  }

  private static boolean isLeopard() {
    return isMac && isTiger() && !OS_VERSION.startsWith("10.4");
  }

  private static boolean isSnowLeopard() {
    return isMac && isLeopard() && !OS_VERSION.startsWith("10.5");
  }

  public static boolean isJavaVersionAtLeast(String v) {
    return StringUtil.compareVersionNumbers(JAVA_RUNTIME_VERSION, v) >= 0;
  }
}