#-------------------#
# Script Parameters #
#-------------------#
# Description
# The Uninstall_Quest_Agent script is uninstalling the Quest RUM Agent
# 
# How to use it 
#
# .\Uninstall_Quest_Agent.ps1 -Pole "POLE_IDF" -Site "Site_1" -LogServer "LOG_SERVER_1" -LogShare "QuestUninstallLogs$"
#
# -Pole = Targeted Pole
# -Site = Targeted Site
# -LogServer = Server on which the uninstall logs will be stored
# -LogShare (not mandatory) = Network Share on which the uninstall logs will be stored

########## PARAMETERS ##########

[CmdletBinding(DefaultParametersetName="Common")]
param(
	
	#Attribute field to check
	[Parameter(Mandatory=$true,Position=1)][string] $Pole = $null,
	
	#Attribute field to check
	[Parameter(Mandatory=$true,Position=2)][string] $Site = $null,
	
	#Attributes fields to check
	[Parameter(Mandatory=$false,Position=3)][string] $LogServer = $null,

	#Attributes fields to check
	[Parameter(Mandatory=$false,Position=4)][string] $LogShare = "QuestUninstallLogs$"
	
	)

########## SCRIPT EXECUTION ##########

# Check if script has been executed (log file already exists)

# Define logfile path and name
# Detailed logs
$LogFileDirectoryPath = "\\" + $LogServer + "\" + $LogShare + "\" + $Pole + "\" + $Site + "\COMPUTERS"
$LogFileName = $env:computername + ".log"
$LogFilePath = $LogFileDirectoryPath + "\" + $LogFileName

# Summary logs
$SummaryLogFileDirectoryPath = "\\" + $LogServer + "\" + $LogShare + "\" + $Pole + "\" + $Site
$SummaryLogFileName = $Pole + "_" + $Site + "_" + "SUMMARY.log"
$SummaryLogFilePath = $SummaryLogFileDirectoryPath + "\" + $SummaryLogFileName

# End script if Quest Agent Service is missing
$Service = Get-Service QsRUMAgent -ErrorAction SilentlyContinue

if($Service -eq $null)
{
    Exit
}

########## LOG FILES MANAGMENT ##########

# Checking if directories need to be created

# Check if pole directory exists
$PoleFilePath = "\\" + $LogServer + "\" + $LogShare + "\" + $Pole

# If directory don't exist, we create it
if(!(Test-Path $PoleFilePath))
{
    New-Item $PoleFilePath -ItemType Directory
}

# Check if site directory exists
$SiteFilePath = "\\" + $LogServer + "\" + $LogShare + "\" + $Pole + "\" + $Site

# If directory don't exist, we create it
if(!(Test-Path $SiteFilePath))
{
    New-Item $SiteFilePath -ItemType Directory
}

# Check if COMPUTERS directory exists
$ComputersFilePath = "\\" + $LogServer + "\" + $LogShare + "\" + $Pole + "\" + $Site + "\COMPUTERS"

# If directory don't exist, we create it
if(!(Test-Path $ComputersFilePath))
{
    New-Item $ComputersFilePath -ItemType Directory
}

########## UNINSTALLING AGENT ##########

$Date = (Get-Date).ToString()
$ComputerName = "\\" + $env:computername

# Log
$ToWrite = $Date + " - " + "Begining of Quest agent uninstallation"
Add-Content $LogFilePath $ToWrite

# Stopping and Deleting Quest Migration Manager RUM Agent Service
$Service = Get-Service QsRUMAgent -ErrorAction SilentlyContinue

#If service exists
if($Service)
{
    Stop-Service $Service.Name
    # Log
    $ToWrite = $Date + " - " + "Quest Migration Manager RUM Agent Service - Stopped"
    Add-Content $LogFilePath $ToWrite

    sc.exe $ComputerName delete $Service.Name
    # Log
    $ToWrite = $Date + " - " + "Quest Migration Manager RUM Agent Service - Deleted"
    Add-Content $LogFilePath $ToWrite

    # Log Général
    $ToWrite = $Date + " - " + $env:computername + " - " + "Agent Deleted"
    Add-Content $SummaryLogFilePath $ToWrite
}

else
{
    # Log
    $ToWrite = $Date + " - " + "ERROR : Quest Migration Manager RUM Agent Service not found !"
    Add-Content $LogFilePath $ToWrite
}

# Deleting Quest Migration Manager RUM Agent Directory
$QuestAgentDirectory = "$env:SystemRoot\Quest Resource Updating Agent"

#If directory exists
if(Test-Path $QuestAgentDirectory)
{
    Remove-Item $QuestAgentDirectory -Recurse
    # Log
    $ToWrite = $Date + " - " + "Quest Migration Manager RUM Agent Directory - Deleted"
    Add-Content $LogFilePath $ToWrite
}

else
{
    # Log
    $ToWrite = $Date + " - " + "ERROR : Quest Migration Manager RUM Agent Directory not found !"
    Add-Content $LogFilePath $ToWrite
}

# Log
$ToWrite = $Date + " - " + "End of Quest agent uninstallation"
Add-Content $LogFilePath $ToWrite