/*
 * REFERENCES:
 * https://www.joe0.com/2019/01/27/how-create-a-custom-browser-uri-scheme-and-c-protocol-handler-client-that-supports-opening-and-editing-of-remotely-hosted-documents-through-webdav/
 * https://stackoverflow.com/questions/44675085/minimize-console-at-app-startup-c-sharp
 * 
 */
using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;

namespace LocalExplorer
{
    class Program
    {
        [DllImport("User32.dll", CallingConvention = CallingConvention.StdCall, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool ShowWindow([In] IntPtr hWnd, [In] int nCmdShow);

        static void Main(string[] args)
        {
            //Start this process hidden
            IntPtr handle = Process.GetCurrentProcess().MainWindowHandle;
            ShowWindow(handle, 0);

            //Check to make sure a path was passed in as an argument to the program.
            if (args.Length == 0)
            {
                Console.WriteLine("usage: LocalExplorer.exe <path to open with Explorer.exe>");
                WriteOutputFile("no args passed to program");
                Environment.Exit(1);
            }

            //Collect up the path
            //the replace function is here to trim out the arg as it
            //comes in from the url protocol handler
            string path = args[0].Replace("localexplorer:", "").Replace("%5C", "\\"); ;

            WriteOutputFile($"arg passed: {path}");

            //Check to see if the directory exists.
            //if so, pop it open.
            if (Directory.Exists(path))
            {
                ProcessStartInfo startInfo = new ProcessStartInfo
                {
                    Arguments = path,
                    FileName = "explorer.exe"
                };

                //put this inside try/catch block just in case 
                //explorer.exe has a permission issue or something.
                try
                {
                    Process.Start(startInfo);
                }
                catch
                {
                    Console.WriteLine($"Could not proc explorer.exe to open {path}");
                    WriteOutputFile($"Could not proc explorer.exe to open {path}");
                }
            }
            else
            {
                WriteOutputFile($"Directory does not exist: {path}");
                Console.WriteLine("Directory does not exist.");
            }
        } //end main

        private static void WriteOutputFile(string debugLine)
        {
            // comment this out to debug the program
            //return;

            StreamWriter outFile = new StreamWriter(@"C:\LocalExplorer\OUTPUT.txt", true);
            outFile.WriteLine(debugLine);
            outFile.Close();
        }
    }
}