[CmdletBinding(SupportsShouldProcess)]
param(
    [string]$TargetOuDn = 'OU=Laboratorio,DC=lci,DC=lasalle,DC=mx',
    [string]$GpoName = 'SGU - Windows client experience',
    [string]$DomainController = $env:COMPUTERNAME
)

$ErrorActionPreference = 'Stop'
$identity = [Security.Principal.WindowsIdentity]::GetCurrent()
$principal = [Security.Principal.WindowsPrincipal]::new($identity)
if (-not $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    throw 'Run this script from an elevated Windows PowerShell session on a domain controller or management host.'
}

Import-Module ActiveDirectory -ErrorAction Stop
Import-Module GroupPolicy -ErrorAction Stop

$targetOu = Get-ADOrganizationalUnit `
    -Identity $TargetOuDn `
    -Server $DomainController `
    -ErrorAction Stop
$domainDn = ($targetOu.DistinguishedName -split ',DC=', 2)[1]
if (-not $domainDn) {
    throw 'TargetOuDn does not contain a domain distinguished name.'
}
$domainName = ($domainDn -replace ',DC=', '.')

$gpo = Get-GPO -Name $GpoName -Domain $domainName -Server $DomainController -ErrorAction SilentlyContinue
if (-not $gpo -and $PSCmdlet.ShouldProcess($GpoName, 'Create the SGU Windows client policy GPO')) {
    $gpo = New-GPO -Name $GpoName -Domain $domainName -Server $DomainController
}
if (-not $gpo) {
    throw "The GPO '$GpoName' does not exist and was not created."
}

$existingLink = @(Get-GPInheritance -Target $TargetOuDn -Domain $domainName -Server $DomainController).GpoLinks |
    Where-Object DisplayName -eq $GpoName |
    Select-Object -First 1
$existingLinkEnabled = $existingLink -and (
    $existingLink.Enabled -eq $true -or
    [string]$existingLink.Enabled -eq 'Yes')
if (-not $existingLink) {
    if ($PSCmdlet.ShouldProcess($TargetOuDn, "Link and enable '$GpoName'")) {
        New-GPLink `
            -Name $GpoName `
            -Target $TargetOuDn `
            -Domain $domainName `
            -Server $DomainController `
            -LinkEnabled Yes | Out-Null
    }
}
elseif (-not $existingLinkEnabled -and
    $PSCmdlet.ShouldProcess($TargetOuDn, "Enable the '$GpoName' link")) {
    Set-GPLink `
        -Name $GpoName `
        -Target $TargetOuDn `
        -Domain $domainName `
        -Server $DomainController `
        -LinkEnabled Yes | Out-Null
}

$dataCollectionKey = 'HKLM\Software\Policies\Microsoft\Windows\DataCollection'
$powerPolicyRoot = 'HKLM\Software\Policies\Microsoft\Power\PowerSettings'
$credentialProviderPolicyKey = 'HKLM\Software\Policies\Microsoft\Windows\System'
$interactiveLogonPolicyKey = 'HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System'
$accountPicturePolicyKey = 'HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer'
$providerClassId = '{D789CFD8-5AD4-489F-9B83-7EB5D9D09335}'
$policies = @(
    @{ Key = $dataCollectionKey; Name = 'AllowTelemetry'; Type = 'DWord'; Value = 0 },
    @{ Key = $dataCollectionKey; Name = 'DisableTelemetryOptInSettingsUx'; Type = 'DWord'; Value = 1 },
    @{ Key = $dataCollectionKey; Name = 'DisableTelemetryOptInChangeNotification'; Type = 'DWord'; Value = 1 },
    @{ Key = $dataCollectionKey; Name = 'DisableDiagnosticDataViewer'; Type = 'DWord'; Value = 1 },
    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\OOBE'; Name = 'DisablePrivacyExperience'; Type = 'DWord'; Value = 1 },
    @{ Key = $interactiveLogonPolicyKey; Name = 'EnableFirstLogonAnimation'; Type = 'DWord'; Value = 0 },
    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\LocationAndSensors'; Name = 'DisableLocation'; Type = 'DWord'; Value = 1 },
    @{ Key = 'HKLM\Software\Policies\Microsoft\Windows\AppPrivacy'; Name = 'LetAppsAccessLocation'; Type = 'DWord'; Value = 2 },

    # Enrollment selects the provider before domain join; this computer GPO
    # becomes the authoritative, self-healing configuration afterwards.
    @{ Key = $credentialProviderPolicyKey; Name = 'DefaultCredentialProvider'; Type = 'String'; Value = $providerClassId },
    @{ Key = $credentialProviderPolicyKey; Name = 'EnumerateLocalUsers'; Type = 'DWord'; Value = 0 },
    @{ Key = $interactiveLogonPolicyKey; Name = 'DontDisplayLastUserName'; Type = 'DWord'; Value = 1 },

    # Use Windows' native default account image for named user tiles. LogonUI
    # retains ownership of the anonymous Other user tile and its circular mask.
    @{ Key = $accountPicturePolicyKey; Name = 'UseDefaultTile'; Type = 'DWord'; Value = 1 }
)

$powerSettingIds = @(
    '3c0bc021-c8a8-4e07-a973-6b14cbcb2b7e', # Turn off display after
    '29f6c1db-86da-48c5-9fdb-f2b67b1f44da', # Sleep after
    '9d7815a6-7ee4-497e-8888-515a05f02364', # Hibernate after
    '94ac6d29-73ce-41a6-809f-6363ba21b47e'  # Allow hybrid sleep
)
foreach ($settingId in $powerSettingIds) {
    $settingKey = "$powerPolicyRoot\$settingId"
    $policies += @{ Key = $settingKey; Name = 'ACSettingIndex'; Type = 'DWord'; Value = 0 }
    $policies += @{ Key = $settingKey; Name = 'DCSettingIndex'; Type = 'DWord'; Value = 0 }
}

foreach ($policy in $policies) {
    if ($PSCmdlet.ShouldProcess($GpoName, "Set $($policy.Key)\$($policy.Name)=$($policy.Value)")) {
        Set-GPRegistryValue `
            -Name $GpoName `
            -Domain $domainName `
            -Server $DomainController `
            -Key $policy.Key `
            -ValueName $policy.Name `
            -Type $policy.Type `
            -Value $policy.Value | Out-Null
    }
}

$configuredPolicies = [ordered]@{}
foreach ($policy in $policies) {
    $configured = Get-GPRegistryValue `
        -Name $GpoName `
        -Domain $domainName `
        -Server $DomainController `
        -Key $policy.Key `
        -ValueName $policy.Name
    $configuredPolicies[$policy.Name + '@' + $policy.Key] = $configured.Value
}
$link = @(Get-GPInheritance -Target $TargetOuDn -Domain $domainName -Server $DomainController).GpoLinks |
    Where-Object DisplayName -eq $GpoName |
    Select-Object -First 1
$linkEnabled = $link -and (
    $link.Enabled -eq $true -or
    [string]$link.Enabled -eq 'Yes')

[pscustomobject]@{
    GpoName = $GpoName
    GpoId = $gpo.Id
    TargetOu = $TargetOuDn
    LinkEnabled = [bool]$linkEnabled
    PolicyCount = $configuredPolicies.Count
    Policies = [pscustomobject]$configuredPolicies
}