param(
  [Parameter(Mandatory=$true)][string]$Version,
  [Parameter(Mandatory=$true)][string]$BinPath,
  [string]$WV2Fixed = "",
  [string]$SevenZip = "C:\Program Files\7-Zip\7z.exe",
  [string]$SfxModule = "C:\Program Files\7-Zip\7z.sfx",
  [string]$OutputDir = "."
)

$ErrorActionPreference = "Stop"

if ($Version -notin @("v3", "v4")) {
  throw "Unsupported Version '$Version'. Use v3 or v4."
}
if (!(Test-Path $BinPath)) {
  throw "Missing binary: $BinPath"
}

$Root = Resolve-Path (Join-Path $PSScriptRoot "..\..")
$OutRoot = Resolve-Path $OutputDir
$Work = Join-Path $PSScriptRoot "payload_$Version"
$Archive = Join-Path $PSScriptRoot "payload_$Version.7z"
$ZipOut = Join-Path $OutRoot "Avida-ED-$Version-Windows-x64.zip"
$ExeOut = Join-Path $OutRoot "Avida-ED-$Version-Windows-x64.exe"

Remove-Item $Work -Recurse -Force -ErrorAction SilentlyContinue
Remove-Item $Archive -Force -ErrorAction SilentlyContinue
New-Item -ItemType Directory -Force -Path $Work | Out-Null

Copy-Item $BinPath -Destination (Join-Path $Work "avidaed_onefile.exe")

$HasFixedRuntime = $false
if ($WV2Fixed -and (Test-Path $WV2Fixed)) {
  Copy-Item $WV2Fixed -Destination (Join-Path $Work "WebView2Fixed") -Recurse
  $HasFixedRuntime = $true
}

$runbat = @"
@echo off
setlocal
set HERE=%~dp0
if exist "%HERE%WebView2Fixed\msedgewebview2.exe" set WEBVIEW2_BROWSER_EXECUTABLE_FOLDER=%HERE%WebView2Fixed
start "" "%HERE%avidaed_onefile.exe"
"@
$runbat | Out-File -Encoding ASCII (Join-Path $Work "run.bat")

$readme = @"
Avida-ED $Version for Windows

Run run.bat to start Avida-ED.

This package includes a WebView2 Fixed Runtime: $HasFixedRuntime
If no fixed runtime is bundled, Microsoft Edge WebView2 Runtime must already be installed.
"@
$readme | Out-File -Encoding UTF8 (Join-Path $Work "README.txt")

if (!(Test-Path $SevenZip)) {
  throw "Missing 7-Zip at $SevenZip"
}

& $SevenZip a -tzip $ZipOut "$Work\*" | Write-Host
Write-Host "Wrote $ZipOut"

if (Test-Path $SfxModule) {
  & $SevenZip a -t7z $Archive "$Work\*" | Write-Host
  $Cfg = Join-Path $PSScriptRoot "config.txt"
  $OutStream = [System.IO.File]::Create($ExeOut)
  try {
    foreach ($Path in @($SfxModule, $Cfg, $Archive)) {
      $Bytes = [System.IO.File]::ReadAllBytes($Path)
      $OutStream.Write($Bytes, 0, $Bytes.Length)
    }
  } finally {
    $OutStream.Close()
  }
  Write-Host "Wrote $ExeOut"
} else {
  Write-Warning "SFX module not found at $SfxModule; skipped EXE creation."
}