/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2016 Thomas Braun, Jens Klingen, Robin Krom
 *
 * For more information see: http://getgreenshot.org/
 * The Greenshot project is hosted on GitHub: https://github.com/greenshot
 *
 * 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 1 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/>.
 */

using System;

namespace GreenshotPlugin.Core
{
    /// <summary>
    /// Extensions to help with querying the Operating System
    /// </summary>
    public static class OperatingSystemExtensions
    {
        /// <summary>
        /// Test if the current OS is Windows 10
        /// </summary>
        /// <param name="operatingSystem">OperatingSystem from Environment.OSVersion</param>
        /// <returns>true if we are running on Windows 10</returns>
        public static bool IsWindows10(this OperatingSystem operatingSystem)
        {
            return operatingSystem.Version.Major == 10;
        }

        /// <summary>
        /// Test if the current OS is Windows 8(.1)
        /// </summary>
        /// <param name="operatingSystem">OperatingSystem from Environment.OSVersion</param>
        /// <returns>true if we are running on Windows 8(.1)</returns>
        public static bool IsWindows8(this OperatingSystem operatingSystem)
        {
            return operatingSystem.Version.Major == 6 && operatingSystem.Version.Minor >= 2;
        }

        /// <summary>
        /// Test if the current OS is Windows 8 or later
        /// </summary>
        /// <param name="operatingSystem">OperatingSystem from Environment.OSVersion</param>
        /// <returns>true if we are running on Windows 8 or later</returns>
        public static bool IsWindows8OrLater(this OperatingSystem operatingSystem)
        {
            return (operatingSystem.Version.Major == 6 && operatingSystem.Version.Minor >= 2) || operatingSystem.Version.Major >= 6;
        }

        /// <summary>
        /// Test if the current OS is Windows 7 or later
        /// </summary>
        /// <param name="operatingSystem">OperatingSystem from Environment.OSVersion</param>
        /// <returns>true if we are running on Windows 7 or later</returns>
        public static bool IsWindows7OrLater(this OperatingSystem operatingSystem)
        {
            return (operatingSystem.Version.Major == 6 && operatingSystem.Version.Minor >= 1) || operatingSystem.Version.Major >= 6;
        }

        /// <summary>
        /// Test if the current OS is Windows Vista or later
        /// </summary>
        /// <param name="operatingSystem">OperatingSystem from Environment.OSVersion</param>
        /// <returns>true if we are running on Windows Vista or later</returns>
        public static bool IsWindowsVistaOrLater(this OperatingSystem operatingSystem)
        {
            return operatingSystem.Version.Major >= 6;
        }

        /// <summary>
        /// Test if the current OS is Windows XP or later
        /// </summary>
        /// <param name="operatingSystem">OperatingSystem from Environment.OSVersion</param>
        /// <returns>true if we are running on Windows XP or later</returns>
        public static bool IsWindowsXpOrLater(this OperatingSystem operatingSystem)
        {
            // Windows 2000 is Major 5 minor 0
            return Environment.OSVersion.Version.Major > 5 || (Environment.OSVersion.Version.Major == 5 && Environment.OSVersion.Version.Minor >= 1);
        }
    }
}