$root = "C:\Users\Karthik\Documents\GitRepositories\Calculations\Dipolar-Gas-Simulator\Results\Data_3D\GradientDescent\Phi020"

# Step 1: Delete all files except 'psi_gs.mat'
Get-ChildItem -Path $root -Recurse -File -Force |
Where-Object { $_.Name -ne "psi_gs.mat" } |
ForEach-Object {
    try {
        Remove-Item -Path $_.FullName -Force -ErrorAction Stop
        Write-Output "Deleted: $($_.FullName)"
    } catch {
        Write-Warning "Failed to delete: $($_.FullName)"
    }
}

# Step 2: Delete all empty directories (deepest first)
Get-ChildItem -Path $root -Recurse -Directory -Force |
Sort-Object FullName -Descending |
ForEach-Object {
    if (-not (Get-ChildItem -Path $_.FullName -Force)) {
        try {
            Remove-Item -Path $_.FullName -Force -ErrorAction Stop
            Write-Output "Deleted empty folder: $($_.FullName)"
        } catch {
            Write-Warning "Failed to delete folder: $($_.FullName)"
        }
    }
}