<#
@Title = A script to migrate from RayVentory Portal to RayVentory Scan Engine
@Author = Raynet GmbH
@Version = 0.1
@Description = This script is supposed to adjust Config.xml files to fix obsolete hardcoded paths
#>

# Setting up logging
Write-Host "Starting migration script"
$tempFilePath = [System.IO.Path]::Combine($env:TEMP, "RVPtoRVSEmigration.log")
Start-Transcript -Path $tempFilePath -NoClobber -Append

Write-Host "PowerShell information"
$PSVersionTable
Write-Host ""

try {
    # Extraction of RVP appdata storage from Registry
    $appdataPath = [string]::Empty;
    $programFilesPath = [string]::Empty;
    if ([Environment]::Is64BitProcess) {
        $appdataPath = Get-ItemProperty -Path "HKLM:\SOFTWARE\WOW6432Node\Raynet\RayVentoryPortal" -Name "AppDataPath" | Select-Object -ExpandProperty "AppDataPath"
        $programFilesPath = [Environment]::ExpandEnvironmentVariables("%ProgramFiles(x86)%")
    }
    else {
        $appdataPath = Get-ItemProperty -Path "HKLM:\SOFTWARE\Raynet\RayVentoryPortal" -Name "AppDataPath" | Select-Object -ExpandProperty "AppDataPath"
        $programFilesPath = [Environment]::ExpandEnvironmentVariables("%ProgramFiles%")
    }

    # Checking if configuration values are in place
    if ([string]::IsNullOrEmpty($appdataPath)) {
        Write-Warning -Message "RayVentory Portal configuration registry is missing. No migration will be done."
        [System.Environment]::Exit(1)
    }

    $configFilePath = [System.IO.Path]::Combine($appdataPath, "Raynet", "RayVentoryPortal", "Config", "Config.xml");
    if (!(Test-Path($configFilePath))) {
        Write-Warning -Message "Configuration file not found. No migration will be done."
        [System.Environment]::Exit(1)
    }
    else {
        # Updating hardcoded paths
        Write-Host "Updating hardcoded paths"

        [xml]$configContent = Get-Content -Path $configFilePath -Encoding UTF8
        $oratrackPath = $configContent.Configuration.OracleTrackerFolderPath;
        $ndtrackPath = $configContent.Configuration.NdtrackExecutablePath;

        $isRiwClassesEmpty = $false;
        $riwClassesPath = $configContent.Configuration.RIWClassesFile;
        if ([string]::IsNullOrEmpty($riwClassesPath)) {
            $isRiwClassesEmpty = $true;
        }

        $isContentChanged = $false

        if (!(Test-Path $oratrackPath) -and !($oratrackPath -eq ".\Contrib\Oratrack")) {
            Write-Warning "OraTrack configuration is invalid : $oratrackPath. Will be reset to default: .\Contrib\Oratrack"
            $oratrackPath = ".\Contrib\Oratrack";
            $configContent.Configuration.OracleTrackerFolderPath = $oratrackPath;
            $isContentChanged = $true;
        }

        if (!(Test-Path $ndtrackPath) -and !($ndtrackPath -eq ".\Contrib\ndtrack\ndtrack.exe")) {
            Write-Warning "NdTrack configuration is invalid : $ndtrackPath. Will be reset to default: .\Contrib\ndtrack\ndtrack.exe"
            $ndtrackPath = ".\Contrib\ndtrack\ndtrack.exe";
            $configContent.Configuration.NdtrackExecutablePath = $ndtrackPath;
            $isContentChanged = $true;
        }

        if (!$isRiwClassesEmpty -and !(Test-Path $riwClassesPath) -and !($riwClassesPath -eq ".\example.xml")) {
            $riwFileName = [System.IO.Path]::GetFileName($riwClassesPath);
            if ([string]::Equals($riwFileName, "example.xml")) {
                Write-Warning "Zero-Touch cusom inventory configuration file path is invalid: $riwClassesPath. It will be reset to default: .\example.xml"
                $riwClassesPath = ".\example.xml";
                $configContent.Configuration.RIWClassesFile = $riwClassesPath;
                $isContentChanged = $true;
            }
            else {
                Write-Warning "Zero-Touch cusom inventory configuration file path is invalid. Please manually adjust the configuration."
            }
        }

        if ($isContentChanged) {
            # Making a backup of configuration file
            $configBackupPath = $configFilePath + ".old";
            $nameNum = 1;
            $fullConfigBackupPath = $configBackupPath
            while (Test-Path $fullConfigBackupPath) {
                $fullConfigBackupPath = $configBackupPath + $nameNum;
                $nameNum += 1;
            }

            Write-Host "Making a backup of Config.xml: $fullConfigBackupPath"
            Copy-Item -Path $configFilePath -Destination $fullConfigBackupPath

            Write-Host "Writing changes back to Config.xml: $configFilePath";
            Remove-Item -Path $configFilePath -Force
            $configContent.Save($configFilePath)
            Write-Host "Migration process was performed successfully"
        }
        else {
            Write-Host "No changes made to a configuration. Nothing will be written."
        }
    }
}
catch {
    Write-Warning "Migration failed. Check the log file."
    Write-Warning $_
}
finally {
    Stop-Transcript
}