param(
    [string]$Source,
    [string]$Destination,
    [switch]$Overwrite
)

$Blender = "E:\Program Files\Blender Foundation\Blender 5.2\blender.exe"
$Script = Join-Path $PSScriptRoot "convert_glb_to_fbx.py"

if ([string]::IsNullOrWhiteSpace($Source)) {
    $AssetRoot = Join-Path (Split-Path $PSScriptRoot -Parent) "docs\asset"
    $Source = Get-ChildItem -LiteralPath $AssetRoot -Directory |
        Where-Object { @(Get-ChildItem -LiteralPath $_.FullName -Recurse -File -Filter "*.glb").Count -gt 0 } |
        Select-Object -First 1 -ExpandProperty FullName
}
if ([string]::IsNullOrWhiteSpace($Destination)) { $Destination = "$Source`_fbx" }

if (-not (Test-Path -LiteralPath $Blender)) { throw "Blender was not found: $Blender" }
if (-not (Test-Path -LiteralPath $Source)) { throw "Source folder was not found: $Source" }

$Arguments = @("--background", "--python", $Script, "--", "--source", $Source, "--destination", $Destination)
if ($Overwrite) { $Arguments += "--overwrite" }

& $Blender @Arguments
exit $LASTEXITCODE