<#
.SYNOPSIS
  Disable Easy Anti-Cheat in a Rec Room 2020.12+ install so MelonLoader /
  Harmony patches can attach.

.DESCRIPTION
  The 2020.12+ Steam builds ship EAC, but the integration is the standard
  EAC-launcher-wrapper model — NOT in-process anti-cheat in the game
  binary itself.

  Files in a 2020.12 install:

    RecRoom.exe          (~650 KB)  The actual Unity game binary.
                                    No SteamStub, no EAC strings.
    Recroom_Release.exe  (~1.2 MB)  The EAC launcher front-end. Steam
                                    launches this; it reads
                                    EasyAntiCheat/Launcher/Settings.json,
                                    talks to the EAC service, then
                                    spawns RecRoom.exe under EAC.
    EasyAntiCheat/                  EAC service binaries + the launcher's
                                    Settings.json.

  EAC blocks foreign DLL injection (MelonLoader's version.dll proxy,
  Harmony hooks, etc.), which makes a normal Steam launch unrunnable for
  the modded client. The fix is simple: skip the EAC launcher entirely
  and run RecRoom.exe directly. EAC is never loaded into the process,
  no patching of any binary required.

  This script just writes Launch-DorkNet.bat at the install root that
  starts RecRoom.exe directly with any flags you pass through. The
  EasyAntiCheat/ folder and Recroom_Release.exe are left in place —
  they're harmless when nothing invokes them, and leaving them avoids
  tripping unrelated existence checks.

  Designed for use with a DorkNet private server only — EAC's whole
  point is the official live game. On a self-hosted server where every
  client talks to YOUR backend, EAC isn't doing anything useful.

.PARAMETER RecRoomDir
  The Rec Room install root (the folder containing RecRoom.exe,
  EasyAntiCheat/, RecRoom_Data/).

.PARAMETER Revert
  Remove the Launch-DorkNet.bat shortcut. (There's nothing else to
  undo — the script never touches the game files.)

.PARAMETER WhatIf
  Show what would be done without touching the filesystem.

.EXAMPLE
  # Set up direct launch on a 2020.12 install
  .\tools\remove-eac.ps1 -RecRoomDir 'C:\Games\RecRoom'

.EXAMPLE
  # Tear it down
  .\tools\remove-eac.ps1 -RecRoomDir 'C:\Games\RecRoom' -Revert
#>

[CmdletBinding(SupportsShouldProcess = $true)]
param(
    [Parameter(Mandatory)] [string] $RecRoomDir,
    [switch] $Revert
)

$ErrorActionPreference = 'Stop'
Set-StrictMode -Version Latest

function Write-Step($msg) { Write-Host ('> ' + $msg) -ForegroundColor Cyan }
function Write-OK($msg)   { Write-Host ('+ ' + $msg) -ForegroundColor Green }
function Write-Warn2($msg){ Write-Host ('! ' + $msg) -ForegroundColor Yellow }
function Write-Err($msg)  { Write-Host ('x ' + $msg) -ForegroundColor Red }

$resolved = Resolve-Path -LiteralPath $RecRoomDir -ErrorAction SilentlyContinue
if (-not $resolved) { Write-Err "RecRoomDir '$RecRoomDir' does not exist."; exit 1 }
$RecRoomDir = $resolved.Path

$GameExe = Join-Path $RecRoomDir 'RecRoom.exe'
$BootBat = Join-Path $RecRoomDir 'Launch-DorkNet.bat'

if ($Revert) {
    Write-Step 'Reverting — removing Launch-DorkNet.bat.'
    if (Test-Path -LiteralPath $BootBat) {
        if ($PSCmdlet.ShouldProcess($BootBat, 'remove launch shortcut')) {
            Remove-Item -LiteralPath $BootBat
            Write-OK 'Removed Launch-DorkNet.bat'
        }
    } else {
        Write-Warn2 'No Launch-DorkNet.bat present — already reverted.'
    }
    Write-OK 'Done. Steam launch path is unchanged (the script never touched it).'
    exit 0
}

if (-not (Test-Path -LiteralPath $GameExe -PathType Leaf)) {
    Write-Err "RecRoom.exe not found in '$RecRoomDir'."
    Write-Host '  This script targets 2020.12+ installs. For 2020.03.10 there' -ForegroundColor DarkGray
    Write-Host '  is no EAC; just run Recroom_Release.exe directly.' -ForegroundColor DarkGray
    exit 1
}

Write-Step "Setting up direct-launch in $RecRoomDir"

$batBody = @"
@echo off
REM Launch Rec Room 2020.12+ directly, bypassing the EAC launcher
REM (Recroom_Release.exe). Used with a DorkNet private server.
REM
REM RecRoom.exe is the real Unity game binary; the EAC launcher is only
REM responsible for starting it under EAC's process protection. Running
REM the game binary directly means EAC is never loaded into the process,
REM so MelonLoader / Harmony patches attach cleanly.
REM
REM Generated by tools/remove-eac.ps1 -- re-run that script with -Revert
REM to delete this shortcut.

pushd "%~dp0"
start "" "RecRoom.exe" %*
popd
"@
if ($PSCmdlet.ShouldProcess($BootBat, 'write Launch-DorkNet.bat')) {
    Set-Content -LiteralPath $BootBat -Value $batBody -Encoding ASCII
    Write-OK "Wrote $BootBat"
}

Write-Host ''
Write-OK 'EAC bypass ready.'
Write-Host '  - Launch with: ' -NoNewline; Write-Host $BootBat -ForegroundColor White
Write-Host '  - Or run RecRoom.exe directly.' -ForegroundColor DarkGray
Write-Host '  - Do NOT launch Recroom_Release.exe -- that is the EAC launcher.' -ForegroundColor DarkGray
Write-Host '  - Steam "Play" will still try to start Recroom_Release.exe; avoid it.' -ForegroundColor DarkGray
Write-Host '  - To undo: ' -NoNewline; Write-Host '.\tools\remove-eac.ps1 -RecRoomDir "<path>" -Revert' -ForegroundColor White