Informative "uptime" function for powershell on Windows

runtime.ps1

function runtime {
    function extractDate($text, $type) {
        $regex = '.*?' + $type + ' Time: (?:.?(\d{4}).?-.?([01]\d).?-.?([0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+(?:[+-][0-2]\d:[0-5]\d|Z))).*?'
        $date = ( % {[regex]::Match($text, $regex)}).Groups
        return Get-Date($date[1].Value + "-" + $date[2].Value + "-" + $date[3].Value)
    }

    $now = Get-Date
    $bootevents = Get-WinEvent -FilterHashtable @{logname="system";providername="Microsoft-Windows-Kernel-Boot";ID=27} -ErrorAction SilentlyContinue | Sort-Object -Property  "Timecreated" -Descending 
    $boottime = ($bootevents | Where-Object {$_.message -notlike "*0x2."} | Select -first 1).Timecreated
    $wakeevents = Get-WinEvent -FilterHashtable @{logname="system";providername="Microsoft-Windows-Power-Troubleshooter";StartTime=$boottime} -ErrorAction SilentlyContinue | Sort-Object -Property  "Timecreated" -Descending 
    Write-Host $('Runtime since last boot ({0,2:%d} days {0,2:%h} hours {0,2:%m} minutes and {0,2:%s} seconds ago):' -f ($now - $boottime));
    Write-Host $('                         {0,2:%d} days {0,2:%h} hours {0,2:%m} minutes and {0,2:%s} seconds.' -f (
        ($now - $boottime) - (New-TimeSpan -start 0 -end (Get-Date(
            [long]((
                $wakeevents | 
                    ForEach { New-TimeSpan -end (extractDate $_.message "Wake") -start (extractDate $_.message "Sleep")} | 
                    ForEach {$_.Ticks}
            ) | Measure-Object -Sum).sum
        )))
    ))
   
    
    $wake = ($wakeevents | Select -first 1)
    if ([string]::IsNullOrEmpty($wake.message)) {
        Write-Host $('No sleep since last boot')
    } else {
        $waketime = (extractDate $wake.message "Wake") 
        Write-Host $('Runtime since last wake: {0,2:%d} days {0,2:%h} hours {0,2:%m} minutes and {0,2:%s} seconds.' -f (
            New-TimeSpan -end $now -start $waketime
        ))
        $sleepmessage = (Get-WinEvent -FilterHashtable @{logname="system";providername="Microsoft-Windows-Kernel-Power";ID=42} | Sort-Object -Property  "Timecreated" -Descending | Select -first 1).message
        $sleepreason = (( % {[regex]::Match($sleepmessage, 'Sleep Reason: (.*)$')}).Groups)[1]
        $hibernationevents = $bootevents | Where-Object {$_.message -like "*0x2."} 
        $sleeptype = if (!$hibernationevents -Or (New-TimeSpan -start ($hibernationevents | Select -first 1).Timecreated -end $waketime).TotalSeconds -gt 5) { "sleep" } else { "hibernation" }
        $wakereason = (( % {[regex]::Match($wake.message, 'Wake Source: (.*)$')}).Groups)[1]
        Write-Host $('Sleep reason: {0}, sleep type: {1}, wake reason: {2}' -f $sleepreason, $sleeptype, $wakereason)
    }
}