$ErrorActionPreference = 'Stop'
if (-not [Environment]::Is64BitProcess) {
    throw 'Gspoof requires 64-bit Windows PowerShell 5.1. Open its x64 version.'
}
$gspoofOrigin = 'https://gspoof.banka.gg'
$gspoofTls = [Net.ServicePointManager]::SecurityProtocol
$gspoofWeb = New-Object Net.WebClient
try {
    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
    $gspoofWeb.Headers['User-Agent'] = 'Gspoof-Bootstrap/1.0'
    $gspoofManifest = $gspoofWeb.DownloadString("$gspoofOrigin/v1/release") | ConvertFrom-Json
    $gspoofBytes = $gspoofWeb.DownloadData("$gspoofOrigin/releases/Gspoof.Module.exe")
    if ($gspoofBytes.Length -gt 16777216) { throw 'Unexpected module size.' }
    $gspoofSha = [Security.Cryptography.SHA256]::Create()
    try { $gspoofHash = [BitConverter]::ToString($gspoofSha.ComputeHash($gspoofBytes)).Replace('-', '').ToLowerInvariant() }
    finally { $gspoofSha.Dispose() }
    if ($gspoofHash -cne $gspoofManifest.sha256) { throw 'Module integrity check failed. Retry later.' }
    $gspoofAssembly = [Reflection.Assembly]::Load($gspoofBytes)
    $gspoofEntry = $gspoofAssembly.EntryPoint
    if ($null -eq $gspoofEntry) { throw 'The server returned an incompatible module.' }
    $gspoofArguments = New-Object object[] 1
    $gspoofArguments[0] = [string[]]@()
    $gspoofCode = $gspoofEntry.Invoke($null, $gspoofArguments)
    if ($gspoofCode -ne 0) { Write-Host 'Gspoof stopped. See the message above.' }
}
catch [Reflection.TargetInvocationException] {
    throw $_.Exception.InnerException
}
finally {
    $gspoofWeb.Dispose()
    [Net.ServicePointManager]::SecurityProtocol = $gspoofTls
    Remove-Variable gspoofBytes, gspoofAssembly, gspoofArguments -ErrorAction SilentlyContinue
}