using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace cforge
{
    class Program
    {
        static void Main(string[] args)
        {
            
            Console.WriteLine("");
            Console.WriteLine(@"----------------------------------------------------------------------------");
            Console.WriteLine("cforge started");
            Console.WriteLine("Build date:     " + Resources.BuildTime);
            Console.WriteLine("Revision based: " + Resources.CurrentSVNRevision);
            Console.WriteLine(@"----------------------------------------------------------------------------");
            Console.WriteLine("");
            if (Helper.EasyAttachEnabled())
            {
                Console.WriteLine("Easy attach enabled. Now attach with debugger, and then press Enter here!");
                Console.ReadLine();
            }

            if (args.Length == 1 && args[0].StartsWith("cforge:"))
            {
                // invokation via URL Handler:
                // format is
                // "cforge:<command>:additionalargs_or_path_or_whatever
                // now we can remove the start
                // split for the first ":" and the rest is like the normal commandline                
                String arg = args[0].Remove(0, "cforge:".Length);
                List<string> newargs = new List<string>();

                String command = "--" + arg.Split(':')[0];
                newargs.Add(command);
                if (arg.Split(':').Length > 1)
                {
                    string s = System.Uri.UnescapeDataString(arg.Remove(0, arg.Split(':')[0].Length + 1));
                    s = System.Uri.UnescapeDataString(s);
                    newargs.Add(s);
                }

                if(Helper.EasyAttachEnabled())
                {
                    Console.WriteLine("converting arguments from: ");
                    foreach (String s in args)
                    {
                        Console.WriteLine(s);
                    }
                    Console.WriteLine("to: ");
                    foreach (String s in newargs)
                    {
                        Console.WriteLine(s);
                    }
                    
                }

                args = newargs.ToArray();
            }

            if (Helper.EasyAttachEnabled())
            {
                Console.WriteLine("CWD: " + Directory.GetCurrentDirectory());
                Console.WriteLine("User elevated: " + Helper.IsUserElevated());
            }


            if (!Helper.CheckRegistryProtocol())
            {
                Console.WriteLine(@"[WARNING] URL Handler is not registered. CFORGE: links will not work properly. Use Setup.bat to do this (at <CODESYS Installation folder>\CFORGE\ )");
            }

            List<String> liScripts = Helper.GetAllScripts();
            
            bool bDebug = false;

            for (int i = 0; i < args.Length; i++)
            {
                switch (args[i])
                {
                    case "-d":
                        bDebug = true;
                        if (Helper.IsUserElevated())
                            Console.WriteLine("Running elevated");
                        break;

                    // fallthrough intended
                    case "-v":
                    case "--version":
                        
                        Version version = Assembly.GetEntryAssembly().GetName().Version;
                        Console.WriteLine("Version: " + version.ToString());
                        break;

                    case "--setup":
                        if (!Helper.IsUserElevated())
                        {
                            Console.WriteLine("[INFO] Setup URL Handler and add tool to path. ");
                            Helper.RunElevated("--setup");

                        }
                        else
                        {
                            /// bootstrapper 
                            Helper.bootstrap(bDebug);
                            Helper.RegisterProtocol(bDebug);
                            Helper.AddToSystemPath(bDebug);
                        }
                        break;
                    

                    case "--license-info":
                        Helper.ShowLicenseInfo();
                        break;

                    
                    
                    /* fallthrough intended ! */
                    case "--help":
                    case "-h":
                        ShowUsage();
                        break;

                    default:
                        if (Helper.EasyAttachEnabled())
                        {
                            Console.WriteLine("default case: " + args[i]);
                        }
                        // check if we have matching script:
                        if (args[i].StartsWith("--"))
                        {
                            String command = args[i].Replace("--", "");
                            if (liScripts.Contains(command))
                            {
                                // the rest of the command is passed as argument to the script
                                string[] newargs = args.Skip(i + 1).ToArray();
                                
                                Helper.ExecuteIPyScript(command, newargs, bDebug);
                                // as we "used" all params...
                                i = args.Length;
                            }
                            else
                            {
                                if (Helper.EasyAttachEnabled())
                                {
                                    Console.WriteLine("no matching script found: " + command);
                                }
                                ShowUsage();
                            }
                        }
                        break;
                }
            }

            if (args.Length == 0)
                ShowUsage();
            
            Console.WriteLine("");
            Console.WriteLine(@"----------------------------------------------------------------------------");
            Console.WriteLine("cforge finished.");
            Console.WriteLine(@"----------------------------------------------------------------------------");
            Console.WriteLine("");

            Console.ReadLine();
        }

        static void ShowUsage()
        {
            // pad right 32 for description ;-)
            Console.WriteLine(@"usage: cforge <command> <arguments>");
            Console.WriteLine(@"");
            Console.WriteLine(@"internal commands:");
            Console.WriteLine(@"-h/--help                       show this help");
            Console.WriteLine(@"--setup                         register cforge url handler and add cforge to path");
            Console.WriteLine(@"--license-info                  show license information");
            Console.WriteLine(@"-v/--version                    show version information");
            Console.WriteLine(@"");
            
            Console.WriteLine(@"");
            Console.WriteLine(@"external commands (scripts):");
            Console.WriteLine(@"------------------------------");

            // generic part
            
            List<String> liCommands = Helper.GetAllScripts();
            foreach (String  command in liCommands)
            {
                Helper.ShowUsageIPyScript(command, false);
            }
            Console.WriteLine(@"");
            Console.WriteLine(@"");

        }

    }
}