# ***************************************************
# Definitions
#
# ***************************************************

Add-Type -TypeDefinition @'
using System.Runtime.InteropServices;
[Guid("5CDF2C82-841E-4546-9722-0CF74078229A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IAudioEndpointVolume
{
    // f(), g(), ... are unused COM method slots. Define these if you care
    int f(); int g(); int h(); int i();
    int SetMasterVolumeLevelScalar(float fLevel, System.Guid pguidEventContext);
    int j();
    int GetMasterVolumeLevelScalar(out float pfLevel);
    int k(); int l(); int m(); int n();
    int SetMute([MarshalAs(UnmanagedType.Bool)] bool bMute, System.Guid pguidEventContext);
    int GetMute(out bool pbMute);
}
[Guid("D666063F-1587-4E43-81F1-B948E807363F"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IMMDevice
{
    int Activate(ref System.Guid id, int clsCtx, int activationParams, out IAudioEndpointVolume aev);
}
[Guid("A95664D2-9614-4F35-A746-DE8DB63617E6"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IMMDeviceEnumerator
{
    int f(); // Unused
    int GetDefaultAudioEndpoint(int dataFlow, int role, out IMMDevice endpoint);
}
[ComImport, Guid("BCDE0395-E52F-467C-8E3D-C4579291692E")] class MMDeviceEnumeratorComObject { }
public class Audio
{
    static IAudioEndpointVolume Vol()
    {
        var enumerator = new MMDeviceEnumeratorComObject() as IMMDeviceEnumerator;
        IMMDevice dev = null;
        Marshal.ThrowExceptionForHR(enumerator.GetDefaultAudioEndpoint(/*eRender*/ 0, /*eMultimedia*/ 1, out dev));
        IAudioEndpointVolume epv = null;
        var epvid = typeof(IAudioEndpointVolume).GUID;
        Marshal.ThrowExceptionForHR(dev.Activate(ref epvid, /*CLSCTX_ALL*/ 23, 0, out epv));
        return epv;
    }
    public static float Volume
    {
        get { float v = -1; Marshal.ThrowExceptionForHR(Vol().GetMasterVolumeLevelScalar(out v)); return v; }
        set { Marshal.ThrowExceptionForHR(Vol().SetMasterVolumeLevelScalar(value, System.Guid.Empty)); }
    }
    public static bool Mute
    {
        get { bool mute; Marshal.ThrowExceptionForHR(Vol().GetMute(out mute)); return mute; }
        set { Marshal.ThrowExceptionForHR(Vol().SetMute(value, System.Guid.Empty)); }
    }
}
'@


function HardwareSettings-SetVolume ([int] $VolumePercentage)
{
    [audio]::Mute = $false
    [audio]::Volume  = $VolumePercentage/100
}


function HardwareSettings-SetScreenBrightness ([int] $BrightnessPercentage)
{
    try 
    {
        Set-Variable DISPLAY_GUID -option Constant -value "7516b95f-f776-4464-8c53-06167f40cc99"
        Set-Variable BRIGHTNESS_GUID -option Constant -value "aded5e82-b909-4619-9949-f5d71dac0bcb"

        $active_plan_guid = $null

        try {
            $plan = Get-WmiObject -Class win32_powerplan -Namespace root\cimv2\power -ErrorAction SilentlyContinue  | where {$_.isActive -eq $true}
            $regex = [regex]"{(.*?)}"
            $active_plan_guid = $regex.Match($plan.instanceID.Tostring()).groups[1].value
        }
        catch {

            $plan = powercfg /l | select -Skip 3 | select-string -SimpleMatch '*'
            $regex = [regex]":(.*?)\("
            $active_plan_guid = $regex.Match($plan).groups[1].value
        }

        if ($active_plan_guid) 
        {
            invoke-expression "powercfg /setacvalueindex $active_plan_guid $DISPLAY_GUID $BRIGHTNESS_GUID $BrightnessPercentage"
            invoke-expression "powercfg /setdcvalueindex $active_plan_guid $DISPLAY_GUID $BRIGHTNESS_GUID $BrightnessPercentage"
        } 

        $monitor = Get-WmiObject -Namespace root\wmi -Class WmiMonitorBrightnessMethods -ErrorAction SilentlyContinue

        if($monitor) {
            $monitor.wmisetbrightness(0, $BrightnessPercentage)
        }

    }
    catch {}
}

function HardwareSettings-DisableALS
{
    Powercfg.exe -setacvalueindex scheme_current sub_video adaptbright 0
    Powercfg.exe -setdcvalueindex scheme_current sub_video adaptbright 0
    Powercfg.exe -setactive scheme_current
}

function HardwareSettings-DisablePowerSavingTimeouts
{
    powercfg.exe -change -monitor-timeout-ac 0
    powercfg.exe -change -monitor-timeout-dc 0
    powercfg.exe -change -standby-timeout-ac 0
    powercfg.exe -change -standby-timeout-dc 0
    powercfg.exe -change -hibernate-timeout-ac 0
    powercfg.exe -change -hibernate-timeout-dc 0
    reg add "HKEY_CURRENT_USER\Control Panel\Desktop" /v ScreenSaveActive /t REG_SZ /d 0 /f
    Reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Personalization" /v NoLockScreen /t REG_DWORD /d 1 /f
}


Export-ModuleMember -Function HardwareSettings-SetVolume
Export-ModuleMember -Function HardwareSettings-SetScreenBrightness
Export-ModuleMember -Function HardwareSettings-DisableALS
Export-ModuleMember -Function HardwareSettings-DisablePowerSavingTimeouts

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