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// 
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// copy of this software and associated documentation files (the "Software"), 
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// and/or sell copies of the Software, and to permit persons to whom the 
// Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in 
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
// 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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// DEALINGS IN THE SOFTWARE.

#nullable enable

using System;
using System.Runtime.Versioning;
using Duplicati.Library.Interface;

namespace Duplicati.Library.Snapshots.Windows;

/// <summary>
/// Implementation of powermode handler for Windows
/// </summary>
[SupportedOSPlatform("windows")]
public class WindowsPowerModeProvider : IPowerModeProvider
{
    /// <inheritdoc />
    public Action? OnResume { get; set; }
    /// <inheritdoc />
    public Action? OnSuspend { get; set; }

    /// <summary>
    /// Constructs a new power mode provider
    /// </summary>
    public WindowsPowerModeProvider()
    {
        Microsoft.Win32.SystemEvents.PowerModeChanged += new Microsoft.Win32.PowerModeChangedEventHandler(SystemEvents_PowerModeChanged);
    }

    /// <summary>
    /// Handles the power mode events
    /// </summary>
    /// <param name="sender">The event sender</param>
    /// <param name="e">The event args</param>
    private void SystemEvents_PowerModeChanged(object sender, Microsoft.Win32.PowerModeChangedEventArgs e)
    {
        switch (e.Mode)
        {
            case Microsoft.Win32.PowerModes.Suspend:
                OnSuspend?.Invoke();
                break;
            case Microsoft.Win32.PowerModes.Resume:
                OnResume?.Invoke();
                break;
        }
    }

    /// <inheritdoc />
    public void Dispose()
    {
        Microsoft.Win32.SystemEvents.PowerModeChanged -= new Microsoft.Win32.PowerModeChangedEventHandler(SystemEvents_PowerModeChanged);
    }

}