Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Security

function Get-SecureStringFromConsole {
    $password = Read-Host -Prompt "Enter Password" -AsSecureString
    return $password
}

# Create OpenFileDialog for selecting the file to encrypt
$openFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$openFileDialog.Title = "Select the file to encrypt"
$openFileDialog.Filter = "All files (*.*)|*.*"

if ($openFileDialog.ShowDialog() -eq [System.Windows.Forms.DialogResult]::OK) {
    $inputFile = $openFileDialog.FileName
} else {
    Write-Output "Operation cancelled."
    exit
}

$secureKey = Get-SecureStringFromConsole

# Convert SecureString to a byte array
$keyBytes = [System.Text.Encoding]::UTF8.GetBytes((ConvertFrom-SecureString -SecureString $secureKey))

# Create AES encryption object
$aes = [System.Security.Cryptography.Aes]::Create()
$aes.Key = $keyBytes[0..31]  # AES-256 requires a 32-byte key
$aes.IV = $keyBytes[0..15]   # AES requires a 16-byte IV

try {
    $inputStream = [System.IO.File]::OpenRead($inputFile)
    $outputFile = "$inputFile.movencr"
    $outputStream = [System.IO.File]::Create($outputFile)

    # Create a CryptoStream for encryption
    $encryptor = $aes.CreateEncryptor()
    $cryptoStream = New-Object System.Security.Cryptography.CryptoStream ($outputStream, $encryptor, [System.Security.Cryptography.CryptoStreamMode]::Write)

    $buffer = New-Object byte[] 4096
    $totalBytesRead = 0
    $inputFileLength = $inputStream.Length

    Write-Host "Encrypting file..."
    while (($bytesRead = $inputStream.Read($buffer, 0, $buffer.Length)) -gt 0) {
        $totalBytesRead += $bytesRead
        $cryptoStream.Write($buffer, 0, $bytesRead)

        # Update progress
        $percentComplete = [math]::Round(($totalBytesRead / $inputFileLength) * 100)
        Write-Progress -Activity "Encrypting" -Status "$percentComplete% Complete" -PercentComplete $percentComplete
    }

    $cryptoStream.Close()
    $outputStream.Close()
    $inputStream.Close()

    Write-Host "File encrypted successfully. Encrypted file: $outputFile"
} catch {
    Write-Host "Error during encryption: $_"
} finally {
    $aes.Dispose()
}