<#
.SYNOPSIS
  Undo Playnite damage from setup-playnite-pc-hack.ps1 LiteDB writes.

  Fixes:
  1. Removes broken GameScannerConfig (null emulator, scoop\apps) from scanners.db
  2. Clears active library filter that restricts view to RomM only
  3. Disables pc_windows RomM mapping until emulator is recreated in Playnite UI

  Playnite must be fully closed before running.
#>
$ErrorActionPreference = 'Stop'

if (Get-Process -Name 'Playnite*' -ErrorAction SilentlyContinue) {
    throw 'Close Playnite completely, then re-run.'
}

$playniteConfig = Join-Path $env:LOCALAPPDATA 'Playnite\config.json'
$scannersDb     = Join-Path $env:LOCALAPPDATA 'Playnite\library\scanners.db'
$rommConfig     = Join-Path $env:LOCALAPPDATA 'Playnite\ExtensionsData\9700aa21-447d-41b4-a989-acd38f407d9f\config.json'
$liteDbDll      = Join-Path $env:LOCALAPPDATA 'Playnite\LiteDB.dll'
$orphanEmuId    = 'fa12bc5e-dbb9-4d21-b1e6-a67c2fa6a513'
$nullEmuId      = '00000000-0000-0000-0000-000000000000'

# --- 1. Remove broken emulator scanner ---
Add-Type -Path $liteDbDll
$db = [LiteDB.LiteDatabase]::new("Filename=$scannersDb")
$col = $db.GetCollection('GameScannerConfig')
$removed = 0
foreach ($doc in @($col.FindAll())) {
    $emuId = if ($doc['EmulatorId'].IsGuid) { $doc['EmulatorId'].AsGuid.ToString() } else { $doc['EmulatorId'].AsString }
    $dir = if ($doc.ContainsKey('Directory')) { $doc['Directory'].AsString } else { '' }
    if ($emuId -eq $nullEmuId -or $dir -like '*\scoop\apps') {
        $col.Delete($doc['_id']) | Out-Null
        $removed++
        Write-Host "Removed broken scanner: Directory=$dir EmulatorId=$emuId"
    }
}
$db.Dispose()
if ($removed -eq 0) { Write-Host 'No broken GameScannerConfig entries found.' }

# --- 2. Clear RomM-only library filter ---
$cfg = Get-Content -Raw $playniteConfig | ConvertFrom-Json
if ($cfg.FilterSettings.Library -and $cfg.FilterSettings.Library.Ids -and $cfg.FilterSettings.Library.Ids.Count -gt 0) {
    $ids = @($cfg.FilterSettings.Library.Ids)
    Write-Host "Clearing library filter (was: $($ids -join ', '))"
    $cfg.FilterSettings.Library.Ids = @()
}
$cfg | ConvertTo-Json -Depth 20 | Set-Content -Encoding UTF8 $playniteConfig
Write-Host 'Playnite config: library filter cleared.'

# --- 3. Disable orphan pc_windows RomM mapping ---
$romm = Get-Content -Raw $rommConfig | ConvertFrom-Json
$pc = $romm.Mappings | Where-Object { $_.PlatformId -eq 'pc_windows' } | Select-Object -First 1
if ($pc) {
    if ($pc.EmulatorId -eq $orphanEmuId) {
        $pc.Enabled = $false
        Write-Host "Disabled pc_windows RomM mapping (orphan emulator $orphanEmuId)."
        Write-Host 'Re-enable after adding Pokemon PC Hack Launcher in Playnite UI.'
    } else {
        Write-Host "pc_windows mapping uses emulator $($pc.EmulatorId) - left enabled."
    }
    $romm | ConvertTo-Json -Depth 8 -Compress | Set-Content -Encoding UTF8 $rommConfig
}

Write-Host "`nDone. Open Playnite - full library should be visible again."
Write-Host 'Emulated-game scan errors on startup should be gone.'