#region keybindings
Set-PSReadlineKeyHandler -Key Tab -Function Complete
Set-PSReadlineKeyHandler -Key Ctrl+d -Function ViExit
#endregion keybindings

#region prompt dependencies
#set part of the prompt beforehand to optimize the prompt function

#depending on elevated permissions change the delimiter
$identity = [Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()
if($identity.IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) {
    $delimiter = '#'
} else {
    $delimiter = '$'
}

$username = $env:USERNAME.ToLower()
$computername = $env:COMPUTERNAME.ToLower()
#endregion prompt dependencies
function prompt {
    #shorten path with tilde if possible
    #uses .Replace() to prevent regex
    $cwd = (Get-Location).Path.Replace($HOME,'~')

    '[{0}@{1} {2}]{3} ' -f $username,$computername,$cwd,$delimiter
}
function Get-BetterADUser {
    param (
        [Parameter(Mandatory=$true,
                   Position=0)]
        [string]
        $SearchTerm,
        [string]
        $Server = $env:USERDNSDOMAIN
    )

    $filter = 'UserPrincipalName -like "*{0}*" -or Name -like "*{0}*"' -f $SearchTerm

    Get-ADUser -Filter $filter -Server $Server
}
function Get-Feierabend {
    param (
        [Parameter(Position = 0)]
        [datetime]
        $Begin,

        [Parameter(Position = 1)]
        [datetime]
        $PauseStart,

        [Parameter(Position = 2)]
        [datetime]
        $PauseEnd,

        [Parameter(Position = 3)]
        [single]
        $Hours = 6.5
    )

    $Begin.AddHours($Hours).Add($PauseEnd - $PauseStart)
}
function fsh {
    param (
        [string]$ComputerName
    )

    $host.UI.RawUI.WindowTitle = $ComputerName

    Enter-PSSession @PSBoundParameters @args
}

#check for old version
if($PSVersionTable.PSVersion.Major -le 5){
    Write-Host -ForegroundColor Red 'start pwsh instead of powershell'
}