# Configuration
$swu = "srvfile.jarvis.local\SWU"
$ebu = "srvfile.jarvis.local\EBU"
$sourcePaths = @(
    @{Server = "\\$swu"; CredFile = "C:\Scripts\Credentials\server1_cred.xml"; FileName = "data1.csv"},
    @{Server = "\\$ebu"; CredFile = "C:\Scripts\Credentials\server2_cred.xml"; FileName = "data2.csv"},
    # @{Server = "\\Server3\Share"; CredFile = "C:\Scripts\Credentials\server3_cred.xml"; FileName = "data3.csv"}
)

$localPath = "C:\Temp\CSVFiles"
$mergedFile = "C:\Temp\Merged\combined_plates.csv"
$destinationPath = "\\DestinationServer\Share\final_plates.csv"

# Create local directories if they don't exist
New-Item -ItemType Directory -Path $localPath -Force | Out-Null
New-Item -ItemType Directory -Path (Split-Path $mergedFile) -Force | Out-Null

# Function to copy files using specific credentials
function Copy-FileWithCreds {
    param($remoteServer, $credentialFile, $fileName, $localPath)
    
    try {
        $cred = Import-Clixml -Path $credentialFile
        $driveLetter = [guid]::NewGuid().ToString("n").Substring(0, 6)
        
        # Map temporary drive
        New-PSDrive -Name $driveLetter -PSProvider FileSystem -Root $remoteServer -Credential $cred -Scope Script -ErrorAction Stop
        
        # Copy file
        Copy-Item -Path "${driveLetter}:\$fileName" -Destination $localPath -Force -ErrorAction Stop
        Write-Host "Successfully copied $fileName from $remoteServer"
    }
    catch {
        Write-Warning "Error copying from $remoteServer : $_"
    }
    finally {
        # Cleanup drive if it exists
        if (Get-PSDrive -Name $driveLetter -ErrorAction SilentlyContinue) {
            Remove-PSDrive -Name $driveLetter -Force
        }
    }
}

# Copy all source files
foreach ($source in $sourcePaths) {
    Copy-FileWithCreds -remoteServer $source.Server -credentialFile $source.CredFile -fileName $source.FileName -localPath $localPath
}

# Merge CSV files
$combinedData = Get-ChildItem -Path $localPath\*.csv | 
    ForEach-Object {
        if ($_.Name -eq "data1.csv") {
            Import-Csv $_.FullName
        }
        else {
            Import-Csv $_.FullName | Select-Object -Skip 1
        }
    }

$combinedData | Export-Csv -Path $mergedFile -NoTypeInformation -Encoding UTF8

# Copy merged file to destination
try {
    $destCred = Import-Clixml -Path "C:\Scripts\Credentials\destination_cred.xml"
    $driveLetter = [guid]::NewGuid().ToString("n").Substring(0, 6)
    
    New-PSDrive -Name $driveLetter -PSProvider FileSystem -Root (Split-Path $destinationPath -Parent) -Credential $destCred -Scope Script
    Copy-Item -Path $mergedFile -Destination "${driveLetter}:\" -Force
    Write-Host "Successfully copied merged file to destination"
}
catch {
    Write-Warning "Error copying to destination: $_"
}
finally {
    if (Get-PSDrive -Name $driveLetter -ErrorAction SilentlyContinue) {
        Remove-PSDrive -Name $driveLetter -Force
    }
}

# Optional: Cleanup local files
Remove-Item -Path $localPath\* -Force
Remove-Item -Path $mergedFile -Force