function Invoke-WPFPopup {
    param (
        [ValidateSet("Show", "Hide", "Toggle")]
        [string]$Action = "",

        [string[]]$Popups = @(),

        [ValidateScript({
            $invalid = $_.GetEnumerator() | Where-Object { $_.Value -notin @("Show", "Hide", "Toggle") }
            if ($invalid) {
                throw "Found invalid Popup-Action pair(s): " + ($invalid | ForEach-Object { "$($_.Key) = $($_.Value)" } -join "; ")
            }
            $true
        })]
        [hashtable]$PopupActionTable = @{}
    )

    if (-not $PopupActionTable.Count -and (-not $Action -or -not $Popups.Count)) {
        throw "Provide either 'PopupActionTable' or both 'Action' and 'Popups'."
    }

    if ($PopupActionTable.Count -and ($Action -or $Popups.Count)) {
        throw "Use 'PopupActionTable' on its own, or 'Action' with 'Popups'."
    }

    # Collect popups and actions
    $PopupsToProcess = if ($PopupActionTable.Count) {
        $PopupActionTable.GetEnumerator() | ForEach-Object { [PSCustomObject]@{ Name = "$($_.Key)Popup"; Action = $_.Value } }
    } else {
        $Popups | ForEach-Object { [PSCustomObject]@{ Name = "$_`Popup"; Action = $Action } }
    }

    $PopupsNotFound = @()

    # Apply actions
    foreach ($popupEntry in $PopupsToProcess) {
        $popupName = $popupEntry.Name

        if (-not $sync.$popupName) {
            $PopupsNotFound += $popupName
            continue
        }

        $sync.$popupName.IsOpen = switch ($popupEntry.Action) {
            "Show" { $true }
            "Hide" { $false }
            "Toggle" { -not $sync.$popupName.IsOpen }
        }
    }

    if ($PopupsNotFound.Count -gt 0) {
        throw "Could not find the following popups: $($PopupsNotFound -join ', ')"
    }
}