param([string]$Game = 'D:\SteamLibrary\steamapps\common\ProjectZomboid',
      [string]$Viewpoint = 'D:\SteamLibrary\steamapps\workshop\content\108600\3809306528\mods\Viewpoint\42\media\java\client\Viewpoint.jar',
      [string]$BuildDirectory = (Join-Path (Get-Location) 'work\MTKViewpointTurrets-build'),
      [switch]$Sign)
$ErrorActionPreference = 'Stop'
$buildDir = [System.IO.Path]::GetFullPath($BuildDirectory)
New-Item -ItemType Directory -Force -Path $buildDir | Out-Null
$jarDir = Join-Path $PSScriptRoot '42.20\media\java\client'
New-Item -ItemType Directory -Force -Path $jarDir | Out-Null
$sources = @(Get-ChildItem -LiteralPath (Join-Path $PSScriptRoot 'source') -Recurse -Filter '*.java' | ForEach-Object FullName)
& javac --release 25 -classpath "$Game\projectzomboid.jar;$Game\ZombieBuddy.jar;$Viewpoint" -d $buildDir @sources
if ($LASTEXITCODE -ne 0) { throw 'Java compilation failed.' }
& jar --create --file "$jarDir\MTKViewpointTurrets-0.2.0.jar" -C $buildDir .
if ($LASTEXITCODE -ne 0) { throw 'JAR packaging failed.' }
Write-Host "Built $jarDir\MTKViewpointTurrets-0.2.0.jar"
if ($Sign) { & (Join-Path $PSScriptRoot 'Sign.ps1') }