<#
.SYNOPSIS
  Configure RomM plugin mapping for PC hacks. Emulator must be added in Playnite UI (see below).

  Playnite must be fully closed before running (only touches RomM plugin config.json).
#>
$ErrorActionPreference = 'Stop'

$RommConfig = Join-Path $env:LOCALAPPDATA 'Playnite\ExtensionsData\9700aa21-447d-41b4-a989-acd38f407d9f\config.json'
$DestPath   = 'C:\Users\MattC\roms\windows'
$PlatformSpec = 'pc_windows'

if (-not (Test-Path $RommConfig)) { throw "RomM config not found: $RommConfig" }

$emu = Get-Content -Raw $RommConfig | ConvertFrom-Json | ForEach-Object { $_.Mappings } |
    Where-Object { $_.PlatformId -eq $PlatformSpec } | Select-Object -First 1

if (-not $emu -or -not $emu.EmulatorId) {
    Write-Host @'

Add the Playnite emulator first (Library -> Configure Emulators -> Add):

  Name:      Pokemon PC Hack Launcher
  Install:   C:\Users\MattC\Documents\pokemon\scripts
  Profile:   Default
  Platforms: PC (Windows)
  Extensions: zip
  Executable: C:\Program Files\PowerShell\7\pwsh.exe
  Arguments:  -ExecutionPolicy Bypass -File "C:\Users\MattC\Documents\pokemon\scripts\launch-pc-hack.ps1" "{ImagePath}"
  Working dir: {InstallDir}

Then in RomM plugin settings, map pc_windows -> that emulator, destination
'@ + $DestPath + @', Auto-extract ON.

Or re-run this script after the emulator exists (it reads EmulatorId from an existing pc_windows mapping).

'@
    exit 1
}

$cfg = Get-Content -Raw $RommConfig | ConvertFrom-Json
$m = $cfg.Mappings | Where-Object { $_.PlatformId -eq $PlatformSpec } | Select-Object -First 1
if (-not $m) {
    Write-Host 'No pc_windows mapping yet — add it in RomM plugin settings after creating the emulator.'
    exit 1
}
$m.DestinationPath = $DestPath
$m.AutoExtract = $true
$m.Enabled = $true
$m.SyncSaves = $false
New-Item -ItemType Directory -Force -Path $DestPath | Out-Null
$cfg | ConvertTo-Json -Depth 8 -Compress | Set-Content -Encoding UTF8 $RommConfig
Write-Host "RomM pc_windows mapping updated (destination $DestPath, AutoExtract on)."