param(
    [Parameter(Mandatory = $true, Position = 0)]
    [string]$File,

    [Parameter(Mandatory = $false, Position = 1)]
    [ValidateSet("MD5", "SHA1", "SHA256", "SHA384", "SHA512")]
    [string]$Algorithm = "SHA384"
)

if (-not (Test-Path -LiteralPath $File -PathType Leaf)) {
    Write-Host "ERROR: File tidak ditemukan: $File" -ForegroundColor Red
    exit 1
}

$manifestNames = @{
    "MD5"    = "MD5"
    "SHA1"   = "SHA-1"
    "SHA256" = "SHA-256"
    "SHA384" = "SHA-384"
    "SHA512" = "SHA-512"
}

try {
    $resolvedPath = (Resolve-Path -LiteralPath $File).Path

    # Hitung hash
    $result = Get-FileHash -LiteralPath $resolvedPath -Algorithm $Algorithm
    $hex = $result.Hash

    # Convert HEX menjadi raw bytes.
    # Kompatibel dengan Windows PowerShell 5.1 dan PowerShell 7+
    [byte[]]$bytes = for ($i = 0; $i -lt $hex.Length; $i += 2) {
        [Convert]::ToByte($hex.Substring($i, 2), 16)
    }

    # Raw hash bytes -> Base64
    $base64 = [Convert]::ToBase64String($bytes)

    $manifestAlgorithm = $manifestNames[$Algorithm]

    Write-Host ""
    Write-Host "File      : " -NoNewline -ForegroundColor DarkGray
    Write-Host $resolvedPath

    Write-Host "Algorithm : " -NoNewline -ForegroundColor DarkGray
    Write-Host $manifestAlgorithm

    Write-Host ""
    Write-Host "HEX" -ForegroundColor Cyan
    Write-Host $hex

    Write-Host ""
    Write-Host "Base64" -ForegroundColor Green
    Write-Host $base64

    #Write-Host ""
    #Write-Host "MANIFEST.MF" -ForegroundColor Yellow
    #Write-Host "${manifestAlgorithm}-Digest: $base64"

    Write-Host ""
}
catch {
    Write-Host "ERROR: $($_.Exception.Message)" -ForegroundColor Red
    exit 1
}