# Builds a mod jar from source.
#
#   build-mod.ps1 [-Source <dir>] [-Output <jar>]
#
# Mods are ordinary jars with a descriptor at META-INF/rsxmod.properties. There
# is no annotation processor and no gradle: javac against the loader jar, then
# jar, then done.

param(
  [string]$Source = 'G:\RustNotMC\rsx-mods\rsxm-demo',
  [string]$Output = ''
)

$ErrorActionPreference = 'Stop'

if (-not $Output) { $Output = Join-Path $Source 'dist' }
$Loader = 'G:\RustNotMC\rsx-client\dist\rsx-loader.jar'
if (-not (Test-Path $Loader)) { throw "loader jar missing: $Loader" }

$Name = Split-Path -Leaf $Source
$build = Join-Path $Source 'build'
$classes = Join-Path $build 'classes'
$jarPath = Join-Path $Output "$Name.jar"

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

$mainSrc = Join-Path $Source 'src\main\java'
$mainRes = Join-Path $Source 'resources'

$mainFiles = @(Get-ChildItem $mainSrc -Recurse -Filter '*.java' | ForEach-Object { $_.FullName })
Write-Host "  sources: $($mainFiles.Count)"

& javac -encoding UTF-8 -nowarn -proc:none --release 17 -cp $Loader -d $classes @mainFiles
if ($LASTEXITCODE -ne 0) { throw "javac failed" }

if (Test-Path $mainRes) { Copy-Item -Recurse -Force (Join-Path $mainRes '*') $classes }

New-Item -ItemType Directory -Force -Path $Output | Out-Null
Remove-Item $jarPath -Force -ErrorAction SilentlyContinue

# a mod is a library, never an executable, so there is no main class here
Push-Location $classes
& jar --create --file $jarPath -C $classes .
$jarExit = $LASTEXITCODE
Pop-Location
if ($jarExit -ne 0) { throw "jar failed with exit code $jarExit" }

Write-Host ''
Write-Host "  $jarPath ($((Get-Item $jarPath).Length) bytes)"
exit 0