Add dynamic SKU handling for Windows releases and update UI integration

- Introduced a new function `Get-AvailableSkusForRelease` to retrieve available SKUs based on the selected Windows release value.
- Added a new function `Update-WindowsSkuCombo` to refresh the SKU ComboBox in the UI when the release changes.
- Updated the SKU lists for various Windows versions, including client and server SKUs, as well as LTSC editions.
- Modified the `RefreshWindowsSettingsCombos` function to call the new SKU update function.
- Ensured that the SKU ComboBox is populated dynamically based on the selected release, improving user experience and accuracy.

FFUDevelopment/BuildFFUVM_UI.ps1

@@ -759,6 +759,48 @@ function Update-WindowsVersionCombo {
     }
 }
 
+# Function to refresh the Windows SKU ComboBox based on selected release
+function Update-WindowsSkuCombo {
+    param(
+        [int]$selectedReleaseValue
+    )
+
+    $skuCombo = $script:cmbWindowsSKU
+    if (-not $skuCombo) {
+        WriteLog "Update-WindowsSkuCombo: SKU ComboBox not found."
+        return
+    }
+
+    $previousSelectedSku = $null
+    if ($null -ne $skuCombo.SelectedItem) {
+        $previousSelectedSku = $skuCombo.SelectedItem
+    }
+
+    WriteLog "Update-WindowsSkuCombo: Updating SKUs for Release Value '$selectedReleaseValue'."
+    $availableSkus = Get-AvailableSkusForRelease -SelectedReleaseValue $selectedReleaseValue
+    
+    $skuCombo.ItemsSource = $availableSkus
+    WriteLog "Update-WindowsSkuCombo: Set ItemsSource with $($availableSkus.Count) SKUs."
+
+    # Attempt to re-select the previous SKU, or "Pro", or the first available
+    if ($null -ne $previousSelectedSku -and $availableSkus -contains $previousSelectedSku) {
+        $skuCombo.SelectedItem = $previousSelectedSku
+        WriteLog "Update-WindowsSkuCombo: Re-selected previous SKU '$previousSelectedSku'."
+    }
+    elseif ($availableSkus -contains "Pro") {
+        $skuCombo.SelectedItem = "Pro"
+        WriteLog "Update-WindowsSkuCombo: Selected default SKU 'Pro'."
+    }
+    elseif ($availableSkus.Count -gt 0) {
+        $skuCombo.SelectedIndex = 0
+        WriteLog "Update-WindowsSkuCombo: Selected first available SKU '$($skuCombo.SelectedItem)'."
+    }
+    else {
+        $skuCombo.SelectedIndex = -1 # No SKUs available
+        WriteLog "Update-WindowsSkuCombo: No SKUs available for Release '$selectedReleaseValue'."
+    }
+}
+
 # Combined function to refresh both Release and Version combos
 $script:RefreshWindowsSettingsCombos = {
     param([string]$isoPath)
@@ -774,6 +816,9 @@ $script:RefreshWindowsSettingsCombos = {
 
     # Update Version combo based on the selected release
     Update-WindowsVersionCombo -selectedRelease $selectedReleaseValue -isoPath $isoPath
+
+    # Update SKU combo based on the selected release
+    Update-WindowsSkuCombo -selectedReleaseValue $selectedReleaseValue
 }
 
 Add-Type -AssemblyName WindowsBase
@@ -1681,6 +1726,8 @@ $window.Add_Loaded({
                 }
                 # Only need to update the Version combo when Release changes
                 Update-WindowsVersionCombo -selectedRelease $selectedReleaseValue -isoPath $script:txtISOPath.Text
+                # Also update the SKU combo
+                Update-WindowsSkuCombo -selectedReleaseValue $selectedReleaseValue
             })
         $script:btnBrowseISO.Add_Click({
                 $ofd = New-Object System.Windows.Forms.OpenFileDialog
@@ -1696,8 +1743,8 @@ $window.Add_Loaded({
         $script:cmbWindowsLang.ItemsSource = $script:windowsSettingsDefaults.AllowedLanguages
         $script:cmbWindowsLang.SelectedItem = $script:windowsSettingsDefaults.DefaultWindowsLang
 
-        $script:cmbWindowsSKU.ItemsSource = $script:windowsSettingsDefaults.SkuList
-        $script:cmbWindowsSKU.SelectedItem = $script:windowsSettingsDefaults.DefaultWindowsSKU
+        # $script:cmbWindowsSKU.ItemsSource is now populated by Update-WindowsSkuCombo called from RefreshWindowsSettingsCombos
+        $script:cmbWindowsSKU.SelectedItem = $script:windowsSettingsDefaults.DefaultWindowsSKU # Attempt to set default
 
         $script:cmbMediaType.ItemsSource = $script:windowsSettingsDefaults.AllowedMediaTypes
         $script:cmbMediaType.SelectedItem = $script:windowsSettingsDefaults.DefaultMediaType

FFUDevelopment/FFUUI.Core/FFUUI.Core.psm1

@@ -110,6 +110,61 @@ $script:windowsVersionMap = @{
     2025 = @("24H2") # Server 2025
 }
 
+# SKU Groups
+$script:clientSKUs = @(
+    'Home',
+    'Home N',
+    'Home Single Language',
+    'Education',
+    'Education N',
+    'Pro',
+    'Pro N',
+    'Pro Education',
+    'Pro Education N',
+    'Pro for Workstations',
+    'Pro N for Workstations',
+    'Enterprise',
+    'Enterprise N'
+)
+
+$script:serverSKUs = @(
+    'Standard',
+    'Standard (Desktop Experience)',
+    'Datacenter',
+    'Datacenter (Desktop Experience)'
+)
+
+$script:ltsc2016SKUs = @(
+    'Enterprise 2016 LTSB',
+    'Enterprise N 2016 LTSB'
+)
+
+$script:ltscGenericSKUs = @( # For LTSC 2019, 2021, 2024
+    'Enterprise LTSC',
+    'Enterprise N LTSC'
+)
+
+$script:iotLtscSKUs = @(
+    'IoT Enterprise LTSC',
+    'IoT Enterprise N LTSC'
+    # Note: IoT SKUs are often specialized and might have different edition IDs.
+    # This list is a general representation. Actual ISOs might be needed for specific IoT LTSC editions.
+)
+
+# Map Windows Release Values to their corresponding SKU lists
+$script:windowsReleaseSkuMap = @{
+    10   = $script:clientSKUs # Windows 10 Client
+    11   = $script:clientSKUs # Windows 11 Client
+    2016 = $script:serverSKUs # Windows Server 2016
+    2019 = $script:serverSKUs # Windows Server 2019
+    2022 = $script:serverSKUs # Windows Server 2022
+    2025 = $script:serverSKUs # Windows Server 2025
+    1607 = $script:ltsc2016SKUs # Windows 10 LTSB 2016
+    1809 = $script:ltscGenericSKUs + $script:iotLtscSKUs # Windows 10 LTSC 2019
+    2021 = $script:ltscGenericSKUs + $script:iotLtscSKUs # Windows 10 LTSC 2021
+    2024 = $script:ltscGenericSKUs + $script:iotLtscSKUs # Windows 10 LTSC 2024
+}
+
 # --------------------------------------------------------------------------
 # SECTION: Logging Function (Moved from UI_Helpers)
 # --------------------------------------------------------------------------
@@ -204,7 +259,7 @@ function Get-WindowsSettingsDefaults {
         DefaultOptionalFeatures = ""
         DefaultProductKey       = ""
         AllowedFeatures         = $script:allowedFeatures # Return the list
-        SkuList                 = $script:skuList
+        # SkuList will now be populated dynamically based on Windows Release
         AllowedLanguages        = $script:allowedLangs
         AllowedArchitectures    = @('x86', 'x64', 'arm64')
         AllowedMediaTypes       = @('Consumer', 'Business')
@@ -279,6 +334,28 @@ function Get-AvailableWindowsVersions {
     return $result
 }
 
+# Function to get available SKUs for a given Windows Release value
+function Get-AvailableSkusForRelease {
+    [CmdletBinding()]
+    param(
+        [Parameter(Mandatory)]
+        [int]$SelectedReleaseValue
+    )
+
+    WriteLog "Get-AvailableSkusForRelease: Getting SKUs for Release Value '$SelectedReleaseValue'."
+
+    if ($script:windowsReleaseSkuMap.ContainsKey($SelectedReleaseValue)) {
+        $availableSkus = $script:windowsReleaseSkuMap[$SelectedReleaseValue]
+        WriteLog "Get-AvailableSkusForRelease: Found $($availableSkus.Count) SKUs for Release '$SelectedReleaseValue'."
+        return $availableSkus
+    }
+    else {
+        WriteLog "Get-AvailableSkusForRelease: Warning - Release Value '$SelectedReleaseValue' not found in SKU map. Returning default client SKUs."
+        # Fallback to a default list (e.g., client SKUs) or an empty list
+        return $script:clientSKUs
+    }
+}
+
 # Function to return general default settings for various UI elements (Moved from UI_Helpers)
 function Get-GeneralDefaults {
     [CmdletBinding()]
@@ -3639,4 +3716,5 @@ Invoke-ProgressUpdate,
 Invoke-ParallelProcessing,
 Update-ListViewItemStatus,
 Update-OverallProgress,
-Compress-DriverFolderToWim
+Compress-DriverFolderToWim,
+Get-AvailableSkusForRelease