// TARGET:ping
// START_IN:
using System;
using System.Runtime.InteropServices;
using System.Text;
using LoginPI.Engine.ScriptBase;

public static class WinSpoolApi
{
    [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern bool SetDefaultPrinter(string pszPrinter);

    [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern bool GetDefaultPrinter(
        StringBuilder pszBuffer,
        ref int pcchBuffer
    );
}

public class SetDefaultPdfPrinterScript : ScriptBase
{
    void Execute()
    {
        const string desiredPrinter = "Microsoft Print to PDF";
        Log("Starting default-printer change to '" + desiredPrinter + "'");

        // 1) Set the default printer
        if (!WinSpoolApi.SetDefaultPrinter(desiredPrinter))
        {
            int err = Marshal.GetLastWin32Error();
            ABORT("Failed to set default printer (Win32 error " + err + ")");
            return;
        }
        Log("SetDefaultPrinter succeeded");

        // 2) Read it back
        int capacity = 0;
        WinSpoolApi.GetDefaultPrinter(null, ref capacity);
        var buffer = new StringBuilder(capacity);
        if (!WinSpoolApi.GetDefaultPrinter(buffer, ref capacity))
        {
            int err = Marshal.GetLastWin32Error();
            ABORT("Failed to retrieve default printer (Win32 error " + err + ")");
            return;
        }

        string current = buffer.ToString();
        Log("Current default printer is '" + current + "'");

        // 3) Validate
        if (!string.Equals(current, desiredPrinter, StringComparison.OrdinalIgnoreCase))
        {
            ABORT("Default printer mismatch: expected '" 
                  + desiredPrinter 
                  + "', but found '" 
                  + current 
                  + "'");
        }

        Log("Default printer correctly set to '" + desiredPrinter + "'");
    }
}