class DeployViewModel : FirefoxAddinManager.ObservableBase {

    [System.Collections.ObjectModel.ObservableCollection[AddonModel]] $Addons
    [System.Windows.Input.ICommand] $DeployCommand
    [System.Windows.Input.ICommand] $ExportScriptCommand
    [System.Windows.Input.ICommand] $DownloadXpisCommand

    hidden [string] $_statusMessage = ""
    hidden [bool]   $_isDeploying   = $false

    [string] $StatusMessage {
        get { return $this._statusMessage }
        set { $this._statusMessage = $value; $this.OnPropertyChanged("StatusMessage") }
    }

    [bool] $IsDeploying {
        get { return $this._isDeploying }
        set { $this._isDeploying = $value; $this.OnPropertyChanged("IsDeploying") }
    }

    DeployViewModel() {
        $this.Addons = [System.Collections.ObjectModel.ObservableCollection[AddonModel]]::new()
        $this._LoadDefaultAddons()
        $this._InitCommands()
    }

    hidden [void] _LoadDefaultAddons() {
        @(
            @("uBlock Origin",    "uBlock0@raymondhill.net",
              "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi",
              "https://addons.mozilla.org/firefox/addon/ublock-origin/", "Effizienter Werbeblocker"),
            @("Dark Reader",      "addon@darkreader.org",
              "https://addons.mozilla.org/firefox/downloads/latest/darkreader/latest.xpi",
              "https://addons.mozilla.org/firefox/addon/darkreader/", "Dunkles Design"),
            @("Bitwarden",        "{446900e4-71c2-419f-a6a7-df9c091e268b}",
              "https://addons.mozilla.org/firefox/downloads/latest/bitwarden-password-manager/latest.xpi",
              "https://addons.mozilla.org/firefox/addon/bitwarden-password-manager/", "Passwort-Manager"),
            @("KeePassXC",        "keepassxc-browser@keepassxc.org",
              "https://addons.mozilla.org/firefox/downloads/latest/keepassxc-browser/latest.xpi",
              "https://addons.mozilla.org/firefox/addon/keepassxc-browser/", "KeePass-Integration"),
            @("Acrobat Reader",   "acrobat_reader@adobe.com",
              "https://addons.mozilla.org/firefox/downloads/latest/acrobat-reader/latest.xpi",
              "https://addons.mozilla.org/firefox/addon/adobe-acrobat-dc-pdf/", "PDF-Viewer"),
            @("Foxit Reader",     "foxitreader@foxitsoftware.com",
              "https://addons.mozilla.org/firefox/downloads/latest/foxit-reader/latest.xpi",
              "https://addons.mozilla.org/firefox/addon/foxit-reader/", "Foxit PDF-Viewer")
        ) | ForEach-Object {
            $this.Addons.Add([AddonModel]::new($_[0], $_[1], $_[2], $_[3], $_[4]))
        }
    }

    hidden [void] _InitCommands() {
        $vm = $this

        $this.DeployCommand = [FirefoxAddinManager.RelayCommand]::new(
            {
                if (-not [FirefoxService]::IsAdmin()) {
                    [System.Windows.MessageBox]::Show(
                        "Administratorrechte erforderlich.", "Kein Admin",
                        "OK", "Warning"); return
                }
                $vm.IsDeploying = $true
                $vm.StatusMessage = "Deploying..."

                # JSON-String loeschen
                [RegistryService]::RemoveJsonString()

                # Wildcard setzen
                [RegistryService]::SetWildcard("blocked")

                # Ausgewaehlte Add-ons deployen
                $count = 0
                foreach ($addon in $vm.Addons) {
                    if ($addon.IsSelected) {
                        [RegistryService]::DeployAddon($addon)
                        $count++
                    }
                }
                $vm.IsDeploying   = $false
                $vm.StatusMessage = "$count Add-on(s) deployed. Firefox neu starten."
            },
            { return ($this.Addons | Where-Object { $_.IsSelected }).Count -gt 0 }
        )

        $this.ExportScriptCommand = [FirefoxAddinManager.RelayCommand]::new(
            {
                $selected = $vm.Addons | Where-Object { $_.IsSelected }
                if (-not $selected) {
                    [System.Windows.MessageBox]::Show("Bitte Add-ons auswaehlen.", "Hinweis", "OK", "Information")
                    return
                }
                $dlg = New-Object Microsoft.Win32.SaveFileDialog
                $dlg.Filter   = "PowerShell (*.ps1)|*.ps1"
                $dlg.FileName = "Deploy-FirefoxAddons.ps1"
                if (-not $dlg.ShowDialog()) { return }

                $lines = @(
                    "#Requires -RunAsAdministrator"
                    '$base = "HKLM:\SOFTWARE\Policies\Mozilla\Firefox\ExtensionSettings"'
                    'Remove-ItemProperty "HKLM:\SOFTWARE\Policies\Mozilla\Firefox" -Name ExtensionSettings -ErrorAction SilentlyContinue'
                    '$wc = "$base\*"; if (-not (Test-Path $wc)) { New-Item $wc -Force | Out-Null }'
                    'Set-ItemProperty $wc -Name installation_mode -Value blocked'
                )
                foreach ($a in $selected) {
                    $lines += ""
                    $lines += "# $($a.Name)"
                    $lines += '$k = "' + "HKLM:\SOFTWARE\Policies\Mozilla\Firefox\ExtensionSettings\$($a.Id)" + '"'
                    $lines += 'if (-not (Test-Path $k)) { New-Item $k -Force | Out-Null }'
                    $lines += 'Set-ItemProperty $k -Name installation_mode -Value force_installed'
                    $lines += 'Set-ItemProperty $k -Name install_url -Value "' + $a.InstallUrl + '"'
                }
                $lines | Out-File $dlg.FileName -Encoding UTF8
                $vm.StatusMessage = "Skript exportiert: $($dlg.FileName)"
            },
            { $true }
        )
    }

    [AddonModel[]] GetSelectedAddons() {
        return @($this.Addons | Where-Object { $_.IsSelected })
    }
}