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//
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// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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using System;
using System.Runtime.InteropServices;

#nullable enable

namespace Duplicati.UnitTest.DiskImage.Helpers;

/// <summary>
/// Factory class for creating the appropriate <see cref="IDiskImageHelper"/> implementation
/// based on the host operating system.
/// </summary>
public static class DiskImageHelperFactory
{
    /// <summary>
    /// Creates and returns the appropriate disk image helper for the current operating system.
    /// </summary>
    /// <returns>An <see cref="IDiskImageHelper"/> implementation for the current OS.</returns>
    /// <exception cref="PlatformNotSupportedException">Thrown when the current OS is not supported.</exception>
    public static IDiskImageHelper Create()
    {
        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
        {
            return new WindowsDiskImageHelper();
        }
        else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
        {
            return new LinuxDiskImageHelper();
        }
        else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
        {
            return new MacOSDiskImageHelper();
        }
        else
        {
            throw new PlatformNotSupportedException($"Disk image operations are not supported on this operating system: {RuntimeInformation.OSDescription}");
        }
    }

    /// <summary>
    /// Gets a value indicating whether disk image operations are supported on the current platform.
    /// </summary>
    /// <value><c>true</c> if disk image operations are supported; otherwise, <c>false</c>.</value>
    public static bool IsSupported
    {
        get
        {
            return RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
                || RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
                || RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
        }
    }

    /// <summary>
    /// Gets the name of the current platform.
    /// </summary>
    /// <value>The platform name ("Windows", "Linux", "macOS", or "Unknown").</value>
    public static string CurrentPlatformName
    {
        get
        {
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
                return "Windows";
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
                return "Linux";
            else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
                return "macOS";
            else
                return "Unknown";
        }
    }
}
