# Builds the loader into dist\.
#
# Only a JDK is required. No Gradle, no network: the loader is compiled with
# javac exactly the way the client will run it, with --release 17, because the
# game ships its own Java 8 runtime and anything newer simply will not load.
#
#   dist\rsx-loader.jar    the loader and the mod API
#
# NOTE: this file is ASCII on purpose. Windows PowerShell 5.1 reads a .ps1 that
# has no byte order mark using the system ANSI code page, which mangles UTF-8
# and makes the parser choke on non-ASCII text. Keep script messages English.

$ErrorActionPreference = 'Stop'

$Repo = Split-Path -Parent $PSScriptRoot
if (-not $Repo) { $Repo = $PSCommandPath | Split-Path -Parent | Split-Path -Parent }
$Dist = Join-Path $Repo 'dist'
$Out = Join-Path $Repo 'build'

function Say($text) { Write-Host "  $text" -ForegroundColor Cyan }

if (-not (Get-Command javac -ErrorAction SilentlyContinue)) {
    Write-Host '  A JDK (javac) is required.' -ForegroundColor Red
    exit 1
}

New-Item -ItemType Directory -Force -Path $Dist, $Out | Out-Null

# ---------------------------------------------------------------- loader
$mainOut = Join-Path $Out 'classes'
Remove-Item $mainOut -Recurse -Force -ErrorAction SilentlyContinue
New-Item -ItemType Directory -Force -Path $mainOut | Out-Null

$mainSrc = Join-Path $Repo 'src\main\java'
$mainFiles = @(Get-ChildItem $mainSrc -Recurse -Filter '*.java' | ForEach-Object { $_.FullName })
if ($mainFiles.Count -eq 0) {
    Write-Host '  No sources found.' -ForegroundColor Red
    exit 1
}

& javac -encoding UTF-8 --release 17 -Xlint:-options -nowarn -d $mainOut $mainFiles
if ($LASTEXITCODE -ne 0) {
    Write-Host '  Loader failed to compile.' -ForegroundColor Red
    exit 1
}
Say "loader compiled ($($mainFiles.Count) files)"

$manifest = Join-Path $Out 'manifest.txt'
@"
Manifest-Version: 1.0
Implementation-Title: RustNotMC loader
Implementation-Version: 0.1.0
"@ | Set-Content -LiteralPath $manifest -Encoding ASCII

$jar = Join-Path $Dist 'rsx-loader.jar'
if (Test-Path -LiteralPath $jar) { Remove-Item -LiteralPath $jar -Force }
& jar cfm $jar $manifest -C $mainOut .
if ($LASTEXITCODE -ne 0) {
    Write-Host '  Could not package the jar.' -ForegroundColor Red
    exit 1
}
Say "rsx-loader.jar ($((Get-Item $jar).Length) bytes)"

Write-Host ''
Write-Host '  Done:' -ForegroundColor Green
Write-Host "    $jar"