[CmdletBinding()]
param(
    [Parameter(Mandatory = $true)]
    [string]$SiteUrl,

    [Parameter(Mandatory = $true)]
    [string]$ListTitle,

    [Parameter(Mandatory = $true)]
    [string]$ExpiryFieldInternalName,

    [Guid]$FieldCustomizerComponentId = 'a555f4fc-d6a6-4421-8189-457449d9bbde',

    [string]$ClassicScriptUrl = '~site/SiteAssets/ExpiryIndicator/ExpiryIndicatorClassic.js',

    [switch]$SkipClassic
)

$isapiPath = Join-Path ([Environment]::GetFolderPath('CommonProgramFiles')) 'microsoft shared\Web Server Extensions\16\ISAPI'
Add-Type -Path (Join-Path $isapiPath 'Microsoft.SharePoint.Client.Runtime.dll')
Add-Type -Path (Join-Path $isapiPath 'Microsoft.SharePoint.Client.dll')

$context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl)
$context.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials

try {
    $list = $context.Web.Lists.GetByTitle($ListTitle)
    $field = $list.Fields.GetByInternalNameOrTitle($ExpiryFieldInternalName)
    $customActions = $list.UserCustomActions
    $context.Load($list)
    $context.Load($field)
    $context.Load($customActions)
    $context.ExecuteQuery()

    if ($field.InternalName -ne $ExpiryFieldInternalName) {
        Write-Warning "Das Feld wurde über seinen Anzeigenamen gefunden. Verwende künftig den internen Namen '$($field.InternalName)'."
    }

    $alreadyBound = $field.ClientSideComponentId -eq $FieldCustomizerComponentId
    $field.ClientSideComponentId = $FieldCustomizerComponentId
    if (-not $alreadyBound -or [string]::IsNullOrWhiteSpace($field.ClientSideComponentProperties)) {
        $field.ClientSideComponentProperties = (@{
            expiryField = $field.InternalName
        } | ConvertTo-Json -Compress)
    }
    $field.Update()

    # Remove old diagnostic registrations and make the V2 Classic
    # registrations idempotent.
    $customActions | Where-Object {
        $_.Name -eq 'ExpiryIndicator.CommandSet' -or
        $_.Name -eq 'ExpiryIndicator.Classic.ScriptLink' -or
        $_.Name -eq 'ExpiryIndicator.Classic.Ribbon'
    } | ForEach-Object {
        $_.DeleteObject()
    }

    $context.ExecuteQuery()

    if (-not $SkipClassic) {
        $scriptAction = $list.UserCustomActions.Add()
        $scriptAction.Name = 'ExpiryIndicator.Classic.ScriptLink'
        $scriptAction.Title = 'ExpiryIndicator Classic runtime'
        $scriptAction.Location = 'ScriptLink'
        $separator = if ($ClassicScriptUrl.Contains('?')) { '&' } else { '?' }
        $scriptAction.ScriptSrc = $ClassicScriptUrl + $separator + 'expiryField=' + [Uri]::EscapeDataString($field.InternalName)
        $scriptAction.Sequence = 650
        $scriptAction.Update()

        $ribbonLocation = if ($list.BaseType -eq [Microsoft.SharePoint.Client.BaseType]::DocumentLibrary) {
            'Ribbon.Library.Actions.Controls._children'
        }
        else {
            'Ribbon.List.Actions.Controls._children'
        }

        $ribbonXml = @"
<CommandUIExtension xmlns="http://schemas.microsoft.com/sharepoint/">
  <CommandUIDefinitions>
    <CommandUIDefinition Location="$ribbonLocation">
      <Button Id="ExpiryIndicator.Classic.ExtendOneYear.Button"
              Command="ExpiryIndicator.Classic.ExtendOneYear"
              Sequence="90"
              LabelText="Ablaufdatum +1 Jahr"
              Description="Verlängert das Ablaufdatum der ausgewählten Elemente um ein Kalenderjahr."
              TemplateAlias="o1" />
    </CommandUIDefinition>
  </CommandUIDefinitions>
  <CommandUIHandlers>
    <CommandUIHandler Command="ExpiryIndicator.Classic.ExtendOneYear"
                      CommandAction="javascript:ExpiryIndicatorClassic.extendSelected();"
                      EnabledScript="javascript:ExpiryIndicatorClassic.canExtend();" />
  </CommandUIHandlers>
</CommandUIExtension>
"@

        $ribbonAction = $list.UserCustomActions.Add()
        $ribbonAction.Name = 'ExpiryIndicator.Classic.Ribbon'
        $ribbonAction.Title = 'ExpiryIndicator Classic ribbon command'
        $ribbonAction.Location = 'CommandUI.Ribbon'
        $ribbonAction.CommandUIExtension = $ribbonXml
        $ribbonAction.Sequence = 651
        $ribbonAction.Update()

        $context.ExecuteQuery()
        Write-Host 'Classic-Ansicht: CSR/JSLink und Ribbon-Befehl wurden registriert.'
    }

    Write-Host "ExpiryIndicator wurde für '$($list.Title)' an '$($field.InternalName)' gebunden."
}
finally {
    $context.Dispose()
}