import-module z
Import-Module 'C:\tools\poshgit\dahlbyk-posh-git-a4faccd\src\posh-git.psd1'

function prompt {
    $shortenedPath = (Get-ShortenedPromptPath $((pwd).Path))

    $host.UI.RawUI.WindowTitle = ("PS " + $shortenedPath)
    $colorHostFg = [ConsoleColor]::White
    $colorLocation = [ConsoleColor]::Cyan

    if (Test-IsAdmin) {
        $colorHostBg = [ConsoleColor]::Red
        $host.UI.RawUI.WindowTitle += " (Admin)"
    }
    else {
        $colorHostBg = [ConsoleColor]::Blue
    }

    $realLASTEXITCODE = $LASTEXITCODE

    # Reset color, which can be messed up by Enable-GitColors
    # $Host.UI.RawUI.ForegroundColor = $GitPromptSettings.DefaultForegroundColor

    Write-Host ([net.dns]::GetHostName().ToLower()) -n -f $colorHostFg -b $colorHostBg

    Write-Host "" $shortenedPath -n -f $colorLocation

    Write-VcsStatus

    $global:LASTEXITCODE = $realLASTEXITCODE

    if ($shortenedPath.length -gt 20) {
        Write-Host " "
    }
    else {
        Write-Host " " -n
    }
    return "> "
}

function Get-ShortenedPromptPath([string] $path) {
    $loc = $path.Replace($HOME, '~')
    return $loc
}

function Test-IsAdmin {
    try {
        $identity = [Security.Principal.WindowsIdentity]::GetCurrent()
        $principal = New-Object Security.Principal.WindowsPrincipal -ArgumentList $identity
        return $principal.IsInRole( [Security.Principal.WindowsBuiltInRole]::Administrator )
    }
    catch {
        throw "Failed to determine if the current user has elevated privileges. The error was: '{0}'." -f $_
    }

    <#
        .SYNOPSIS
            Checks if the current Powershell instance is running with elevated privileges or not.
        .EXAMPLE
            PS C:\> Test-IsAdmin
        .OUTPUTS
            System.Boolean
                True if the current Powershell is elevated, false if not.
    #>
}

function Write-Centered {
    Param(  [string] $message,
        [string] $fgcolor = "White")
    $offsetvalue = [Math]::Round(([Console]::WindowWidth / 2) + ($message.Length / 2))
    Write-Host ("{0,$offsetvalue}" -f $message) -ForegroundColor $fgcolor
}

function Show-WelcomeMessage {
    Write-Centered ([net.dns]::GetHostName().ToUpper() -replace '(.)', '$1 ') -fgcolor "White"

    $current_date = Get-Date -Format 'D'
    $current_uptime = (get-date) - ([System.Management.ManagementDateTimeconverter]::ToDateTime((Get-WmiObject win32_operatingsystem).lastbootuptime))
    $uptime_string = "Up for " + ("{0:%d}d {1:%h}h {2:%m}m {3:%s}s" -f ($current_uptime, $current_uptime, $current_uptime, $current_uptime))

    Write-Centered ($current_date + " | " + $uptime_string) -fgcolor "DarkGray"
    Write-Host ""
}

clear
Show-WelcomeMessage