<#
.SYNOPSIS
  Launch a RomM-served Pokémon PC hack (RPG Maker XP / Essentials) from Playnite.

.DESCRIPTION
  The RomM Playnite plugin downloads each `windows`-platform hack and extracts the
  zip into a folder. These are RPG Maker XP / Pokémon Essentials games whose
  launcher is `Game.exe` at the extracted folder root, and RGSS REQUIRES the
  working directory to be that folder (relative paths to Data/, Audio/, Graphics/).

  This script takes whatever path Playnite hands it (the extracted folder, a file
  inside it, or the zip's sibling folder), locates the correct Game.exe (shallowest
  match, ignoring dev tools like animmaker.exe / RPGXP.exe), sets CWD, and runs it.

  Register it in Playnite as a Custom emulator (see scripts/README or the vault
  ROM Library note) so every `windows` hack imported from RomM uses it.

.PARAMETER Target
  Path Playnite passes — typically {ImagePath} or {StartupDir}. May be a file or
  a directory; the script resolves the game folder from either.

.EXAMPLE
  powershell -ExecutionPolicy Bypass -File launch-pc-hack.ps1 "{ImagePath}"
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory = $true, Position = 0)]
    [string]$Target
)

$ErrorActionPreference = 'Stop'

# dev/editor exes that ship alongside the game but are NOT the launcher
$ignore = @('animmaker.exe', 'rpgxp.exe', 'rgss', 'editor.exe', 'unins', 'setup.exe')

function Find-GameExe([string]$root) {
    # Prefer Game.exe; fall back to the shallowest non-ignored .exe.
    $candidates = Get-ChildItem -LiteralPath $root -Recurse -File -Filter '*.exe' -ErrorAction SilentlyContinue |
        Where-Object { $n = $_.Name.ToLower(); -not ($ignore | Where-Object { $n -like "*$_*" }) } |
        Sort-Object { ($_.FullName -split '[\\/]').Count }   # shallowest first

    $game = $candidates | Where-Object { $_.Name -ieq 'Game.exe' } | Select-Object -First 1
    if (-not $game) { $game = $candidates | Select-Object -First 1 }
    return $game
}

# Resolve the starting directory from whatever Playnite passed.
if (Test-Path -LiteralPath $Target -PathType Leaf) {
    $start = Split-Path -LiteralPath $Target -Parent
} elseif (Test-Path -LiteralPath $Target -PathType Container) {
    $start = $Target
} else {
    throw "launch-pc-hack: path not found: $Target"
}

$exe = Find-GameExe $start
if (-not $exe) {
    # The extracted game may sit one level up (Playnite handed us a sibling file).
    $exe = Find-GameExe (Split-Path -LiteralPath $start -Parent)
}
if (-not $exe) { throw "launch-pc-hack: no Game.exe found under $start" }

$dir = Split-Path -LiteralPath $exe.FullName -Parent
Write-Host "Launching $($exe.Name) in $dir"
# RGSS needs CWD = game folder. Start and wait so Playnite tracks play session.
Start-Process -FilePath $exe.FullName -WorkingDirectory $dir -Wait