# DiskCheck PS script
# Checking a target computer for hard drive failures
#
# Written by Wyatt J. Miller
# Licensed by Mozilla Public License v2
# 2021
#

$logFile="C:\ACS\disk_check.txt"
$computerName=$env:ComputerName
$rebootTime=Get-Date "1:00"
$requireReboot=$false
$volumes=Get-Volume

Function Write-Log{
	Param ([string]$logstring)

	if (-not(Test-Path -Path $logFile -PathType Leaf)) {
		New-Item -ItemType File -Path $logFile -Force
	}

	Add-Content $logFile -value $logstring
}

# function to scan the disk whether we have to use a drive letter
# (i.e. C:, D:, etc) or a filesystem label (i.e. Windows, etc.)
Function Scan-Disk{
	Param ([string]$volume_identifier)

	$result=Repair-Volume -DriveLetter $i.DriveLetter -Scan

	if ($result.value -gt 0) {
		Repair-Volume -DriveLetter $i.DriveLetter -Scan -OfflineScanAndFix
		$requireReboot = $true
	} else {
		Write-Output "$($i.FileSystemLabel): Drive is OK!"
		Write-Log "Date: $($now), Drive Letter: $($i.DriveLetter), Volume Name: $($i.FileSystemLabel), Result: $($result), $($computerName)"
	}
}

Write-Output "Checking disks for $($computerName)"

foreach ($i in $volumes) {
	if ($i.FileSystemLabel -eq $null) {
		$result=Repair-Volume -DriveLetter $i.DriveLetter -Scan

		if ($result.value -gt 0) {
			Repair-Volume -DriveLetter $i.DriveLetter -Scan -OfflineScanAndFix
			$requireReboot = $true
		} else {
			Write-Output "$($i.DriveLetter): Drive is OK!"
			Write-Log "Date: $($now), Drive Letter: $($i.DriveLetter), Result: $($result), $($computerName)"
		}
	} else {
		if ($i.DriveLetter -eq $null) {
			Write-Output "Volume is not identifiable! Skipping..."
			continue
		}

		$result=Repair-Volume -FileSystemLabel $i.FileSystemLabel -Scan

		if ($result.value -gt 0) {
			Repair-Volume -FileSystemLabel $i.FileSystemLabel -Scan -OfflineScanAndFix
			$requireReboot = $true
		} else {
			Write-Output "$($i.FileSystemLabel): Drive is OK!"
			Write-Log "Date: $($now), Volume Name: $($i.FileSystemLabel), Result: $($result), $($computerName)"
		}
	}
}

if ($requireReboot -eq $true) {
	# TODO: Reboot logic goes here
	Write-Output "Reboot required!"
}