Testing Your Mods

param (
	[string]$launcher = "steam", # Default launcher, level 1 of GameDirs config option
	[string]$side = "client", # Default client/server side, level 2 of GameDirs config option
	[string]$branch = "stable", # Default branch, level 3 of GameDirs config option
	[switch]$multiplayer = $false, # When true, enables WIP largely broken multiplayer feature and launches 2 copies of the game instead of 1
	[switch]$loadLatestSave = $false, # When true, the game will automatically load into the last save file you played. This breaks some multiplayer functionality.
	[switch]$waitForDebugger = $false, # Launch the game with the -WaitForDebugger flag, telling SML to hold the game's loading process to allow attaching a C++ debugger
	[switch]$noExceptionHandler = $false, # Launch the game with the -NoExceptionHandler flag, enabling JIT debugging and disabling the UE crash reporter
	[switch]$info = $false, # When true, print info about what copy of the game is being launched
	[switch]$test = $false # When true, the game will not actually be launched. Required files still may be created based on other params
)

# ========================================================================================================================
# Configure this section to match your system and preferences
# ========================================================================================================================

# Arguments to launch the game with
$CommonArgs = "-EpicPortal", "-bUseIpSockets", "-Offline", "-log", "-NewConsole", "-nosplash"

# Edit the below "path"s to contain your game paths for these possible install locations
$GameDirs = @{
	steam = @{
		# Note: Steam only allows installing either client or server at a time
		# The script doesn't know which branch you have selected in Steam's own UI
		client = @{
			steam = @{
				# Example: "C:\Steam\steamapps\common\Satisfactory"
				path = "UNSET"
				exeName = "FactoryGameSteam"
				appid = "526870"
				# Example: 12345678910111213
				savegameSubfolderName = "UNSET"
			}
		}
		server = @{
			steam = @{
				# Example: "C:\Steam\steamapps\common\SatisfactoryDedicatedServer"
				path = "UNSET"
				exeName = "FactoryServer"
				savegameSubfolderName = "UNSET"
			}
		}
	}
	epic = @{
		client = @{
			stable = @{
				path = "UNSET"
				exeName = "FactoryGameEGS"
				# Example: 1234letters0and0numbers0longer12
				savegameSubfolderName = "UNSET"
			}
			experimental = @{
				path = "UNSET"
				exeName = "FactoryGameEGS"
				savegameSubfolderName = "UNSET"
			}
		}
		server = @{
			stable = @{
				path = "UNSET"
				exeName = "FactoryServer"
				savegameSubfolderName = "UNSET"
			}
			experimental = @{
				path = "UNSET"
				exeName = "FactoryServer"
				savegameSubfolderName = "UNSET"
			}
		}
	}
	# Optionally define additional -launcher options here. Hierarchy is -launcher > -side > -branch
}

# Multiplayer options (no longer work as of U8, kept here for future development)
$Username1 = "Host"
$Username2 = "Client"

# Optionally configure the window size and position on the screen (2 sets for 2 copies when using -multiplayer)
$Game1 = "$CommonArgs", "-Username=`"$Username1`""#, "-windowed", "-WinX=0", "-WinY=32", "ResX=960", "ResY=1040"
$Game2 = "$CommonArgs", "-Username=`"$Username2`""#, "-windowed", "-WinX=960", "-WinY=32", "ResX=960", "ResY=1040"

# Location of your savegame root folder for usage with -loadLatestSave
# The default should be fine but you can change it if desired
# It gets combined with the savegameSubfolderName in the GameDirs data to make the full path
$SaveFolder = "$($env:LOCALAPPDATA)\FactoryGame\Saved\SaveGames\"

# ========================================================================================================================
# End configuration section
# ========================================================================================================================

$AutolaunchTempFileName = "AutolaunchScript_Temp.ini"

function CreateSteamAppidFile([string]$filepath, [string]$appid) {
	# Required to launch steam copies
	$SteamAppidFilePath = "$filepath\Engine\Binaries\Win64\steam_appid.txt"
	try {
		# cast to void suppresses output
		[void](New-Item $SteamAppidFilePath -ItemType File -Force)
		Add-Content $SteamAppidFilePath $appid
	} catch {
		Write-Error "Failed to create/modify steam appid file ($SteamAppidFilePath), try running script as admin"
		Write-Error $_
		exit 1
	}
}

function ResolveGamePathFromParams() {
	$selectedLauncher = $GameDirs[$launcher]
	if ($selectedLauncher -eq $null) {
		Write-Error "Requested launcher '$launcher' was not defined in your script config options"
		exit 1
	}
	$selectedSide = $selectedLauncher[$side]
	if ($selectedSide -eq $null) {
		Write-Error "Requested side '$side' was not defined in launcher '$launcher' in your script config options"
		exit 1
	}
	$actualBranch = $branch
	if ($launcher -eq "steam") {
		Write-Debug "Script does not support multiple branches for steam, ignoring the -branch option of '$branch'"
		$actualBranch = "steam"
	}
	$gamePathInfo = $selectedSide[$actualBranch]
	if (($gamePathInfo -eq $null) -or ($gamePathInfo -eq "UNSET")) {
		Write-Error "Requested branch '$actualBranch' for side '$side' was not defined in launcher '$launcher' in your script config options"
		exit 1
	}
	$gameDir = $gamePathInfo["path"]
	if ($gameDir -eq $null) {
		Write-Error "Selected game install '$selectedLauncher > $selectedSide > $actualBranch' is missing 'path' data, it should be the root directory of the install"
		exit 1
	}
	$gameEXE = $gamePathInfo["exeName"]
	if ($gameEXE -eq $null) {
		Write-Error "Selected game install '$selectedLauncher > $selectedSide > $actualBranch' is missing 'exeName' data, it should be the name of the executable file that launches the game"
		exit 1
	}
	if (-not ($gamePathInfo["appid"] -eq $null)) {
		CreateSteamAppidFile -filepath $gameDir -appid $gamePathInfo["appid"]
	}
	return $gamePathInfo
}

$gamePathInfo = ResolveGamePathFromParams

if ($info) {
	Write-Output "Using game install:"
	Write-Output $gamePathInfo
}


function PrepareArgs([string]$baseArgs, [switch]$applySpecial, [System.Collections.Hashtable]$pathInfo) {
	$buildArgs = "$baseArgs"

	if ($applySpecial) {
		if ($waitForDebugger) {
			$buildArgs = "$buildArgs", "-WaitForDebugger"
		}

		if ($noExceptionHandler) {
			$buildArgs = "$buildArgs", "-NoExceptionHandler"
		}

		if ($loadLatestSave) {
			$saveFolderUserId = $gamePathInfo["savegameSubfolderName"]
			if (($saveFolderUserId -eq $null) -or ($saveFolderUserId -eq "UNSET")) {
				Write-Error "Selected game install is missing 'savegameSubfolderName' data in your script config options. It should be the name of the subfolder within your save directory containing the save files you want to use with -loadLatestSave. Your same file directory was entered as: $SaveFolder"
				exit 1
			}

			$fullSaveFolder = "$SaveFolder\$saveFolderUserId"

			# https://stackoverflow.com/questions/9675658/powershell-get-childitem-most-recent-file-in-directory
			# Steam keeps a steam_autocloud.vdf file in here that isn't a savegame
			$latestSaveFile = (Get-ChildItem $fullSaveFolder -Attributes !Directory -Filter *.sav | sort LastWriteTime | select -last 1)
			$latestSaveFileName = $latestSaveFile.Basename

			$AutolaunchFilePath = "$($env:LOCALAPPDATA)\FactoryGame\$AutolaunchTempFileName"

			try {
				# cast to void suppresses output
				[void](New-Item $AutolaunchFilePath -ItemType File -Force)
				Add-Content $AutolaunchFilePath "[/Script/EngineSettings.GameMapsSettings]"
				Add-Content $AutolaunchFilePath "LocalMapOptions=??skipOnboarding?loadgame=$latestSaveFileName"
				Add-Content $AutolaunchFilePath "GameDefaultMap=/Game/FactoryGame/Map/GameLevel01/Persistent_Level.Persistent_Level`nGameInstanceClass=/Script/FactoryGame.FGGameInstance"
			} catch {
				Write-Error "Failed to create/modify autolaunch file ($AutolaunchFilePath)"
				Write-Error $_
				exit 1
			}

			$buildArgs = "$buildArgs", "EngineINI=`"$AutolaunchFilePath`""
			# $buildArgs = "$buildArgs", "EngineINI=`"C:\Git\SF_ModProject\RobWorkingDir\TestWorldAutoLaunch.ini`""
		}
	}

	return $buildArgs
}

$gameDir = $gamePathInfo["path"]
$gameEXE = $gamePathInfo["exeName"]
$GameString = "$($gameDir)\$($gameEXE).exe"

$Game1 = PrepareArgs $Game1 -applySpecial
$Game2 = PrepareArgs $Game2

function BGProcess(){
	if ($test) {
		Write-Output "Test switch used, not actually launching the game"
		Write-Output "Arguments for this game instance: "
		Write-Output @args
		return
	} else {
		Start-Process -NoNewWindow @args
	}
}

BGProcess $GameString $Game1

# TODO Multiplayer launch option is not working well right now
# - As of Update 8, the username option no longer works
# - Direct loading into a save does not properly set up a multiplayer session, meaning joining via `open 127.0.0.1` in the client won't work. the host must manually load another save file for that to be set up

if ($multiplayer) {
	sleep -m 5000
} else {
	return
}

BGProcess $GameString $Game2