param(
    [byte[]] $InputBlob, 
    $TriggerMetadata
)

Write-Host "PowerShell Blob Trigger Function executed"
Write-Host "Blob Name: $($TriggerMetadata.Name)"
Write-Host "Blob Size: $($InputBlob.Length) bytes"

# Source Storage Account
$sourceURI = ""
$sourceContainer = ""
$sourceSASToken = "?"

# Destination Storage Account
$destinationURI = ""
$destinationContainer = ""
$destinationSASToken = "?"

# Construct the full paths while maintaining folder structure
$blobRelativePath = $TriggerMetadata.Name # Keeps full folder path + filename
$sourceFullPath = "$sourceURI/$sourceContainer/$blobRelativePath$sourceSASToken"
$destinationFullPath = "$destinationURI/$destinationContainer/$blobRelativePath$destinationSASToken"

# Check if AzCopy exists
$AzCopyExists = Test-Path "azcopy.exe"
Write-Host "AzCopy exists: $AzCopyExists"

# Download and extract AzCopy if not present
If ($AzCopyExists -eq $False){
    Write-Host "AzCopy not found! Downloading..."
    Invoke-WebRequest -Uri "https://aka.ms/downloadazcopy-v10-windows" -OutFile AzCopy.zip -UseBasicParsing
    Write-Host "Unzip AzCopy.zip"
    Expand-Archive ./AzCopy.zip ./AzCopy -Force
    Get-ChildItem ./AzCopy/*/azcopy.exe | Copy-Item -Destination "./AzCopy.exe"
}

# Copy the blob while maintaining its folder structure
Write-Host "Copying blob from $sourceFullPath to $destinationFullPath"
./azcopy.exe copy "$sourceFullPath" "$destinationFullPath" --recursive=true