using System.Diagnostics;
using System.Net.Sockets;
using CliWrap;
using CliWrap.Buffered;
using InnovEnergy.Lib.Protocols.DBus;
using InnovEnergy.Lib.Protocols.DBus.Daemon;
using InnovEnergy.Lib.Protocols.DBus.Transport;
using InnovEnergy.Lib.Utils;
using InnovEnergy.Lib.Victron.VeDBus;


namespace InnovEnergy.TestBatteryDbus;

//Setting up properties
internal static class Props
{
    public static VeProperties Properties = new VeProperties();
}



public static class Program
{
    public static Int32 Help()
    {
        Console.WriteLine("Usage: TestDbus name [args]");
        Console.WriteLine("");
        Console.WriteLine("Allowed args:");
        Console.WriteLine("    -f    forces the name. only used for com.victronenergy.settings");
        Console.WriteLine("    -h    displays this text");
        Console.WriteLine("");
        Console.WriteLine("This program allows you to \"fake\" a process with dbus-connection.");
        Console.WriteLine("It overtakes and duplicates an existing service specified by the first argument name");
        Console.WriteLine("");
        Console.WriteLine("Allowed Commands:");
        Console.WriteLine("    /exit            exits the program");
        Console.WriteLine("    /get name        gets the value at name");
        Console.WriteLine("    /set name value  sets the value at name to value");
        return 0;
    }
    public static async Task<Int32> Main(String[] args)
    {
        if (args.Contains("-h"))
        {
            return Help();
        }

        var dev = "Release"; //for Debuging change to Debug
        
        //Setup DBUS connection
        Console.WriteLine("Setting up Dbus-connection");
        var dbus = new DBusConnection(Bus.System);

        //Todo Remove me
        if (dev == "Debug")
        {
            var ep = new UnixDomainSocketEndPoint("/home/kim/graber_dbus.sock");
            var auth = AuthenticationMethod.ExternalAsRoot();
            var dbusAddress = new Bus(ep, auth);
            dbus = new DBusConnection(dbusAddress); 
        }
        
        
        //Taking name from args or giving a list of named services to choose from
        var name = args.FirstOrDefault(predicate: (arg) => !arg.StartsWith("-"), await ChooseFromNames(dbus));
        
        
        //catch settings
        if (name == "com.victronenergy.settings" && !args.Contains("-f"))
        {
            Console.WriteLine("com.victronenergy.settings cannot be simulated as the watchdog would force reboot the system.");
            Console.WriteLine("Use -f to overwrite");
        }

        // var properties = new VeProperties();
        
        //Grab up-to-date dbus items and build mirrored VeProperties
        Console.WriteLine("Success...Grabbing newest settings from:");
        Console.WriteLine(name);
        
        // fill properties with preexisting values of the replaced task
        var values = await dbus
            .GetAllValues(name);
        
        var texts = await dbus
            .GetAllTexts(name);

        var keys = values.Keys.Intersect(texts.Keys);

        foreach (var key in keys)
        {
            //writable true is so our new process will correctly handle set requests
            Props.Properties.Set(key, values[key], text: texts[key], writable: true);
        }

        //Catch com.victronenergy.settings name
        Console.WriteLine("Success...Catching name and publishing under: ");
        Console.WriteLine(name);
        
        //Grabbing process name :1.xx and getting the task process id from that
        var processIdNameOwner = await dbus.GetNameOwner(name);
        var processIdTask = dbus.GetConnectionUnixProcessId(processIdNameOwner);
        Int32 processId = (Int32)await processIdTask;
        
        
        Console.WriteLine("pid: " + processId);

        //Setup command accepting loop
        
        
        
        //Queue our task for the name and then kill the old task carrying that name. This should allow us to grab said name and publish to it.
        await dbus.RequestName(name, RequestNameOptions.None);

        var usurpedProcess = new Process();
        
        if (dev == "Debug")
        {
            var result = await Cli.Wrap("ssh").WithArguments($"root@beaglebone kill -9 {processId}").ExecuteBufferedAsync();
            // usurpedProcess = Process.GetProcessById(processId);
        }
        else
        {
            usurpedProcess = Process.GetProcessById(processId);
            usurpedProcess.Kill();
        }

        
        // var commandHandler = new Task(() => {
        //     Console.WriteLine("Enter Commands or exit with /exit: ");
        //     while (true)
        //     {
        //         Console.WriteLine("");
        //
        //         var cmd = Console.ReadLine()?.ToUpper().Trim();
        //         
        //         //Get out if the command is invalid or none
        //         if (StringUtils.IsNullOrEmpty(cmd)) continue;
        //         if (!cmd!.StartsWith("/")) {Help(); continue;}
        //         
        //         //Handle command and if requested end the program, restart the original service we overtook
        //         var exit = ProcessLocalCommand(cmd);
        //         if (!exit) continue;
        //         if (dev == "Debug")
        //         {
        //             var result2 = Cli.Wrap("ssh")
        //                 .WithArguments($"root@beaglebone cd /service && svc -u dbus-fronius")   //{usurpedProcess.ProcessName}
        //                 .ExecuteBufferedAsync();
        //             return;
        //         }
        //         usurpedProcess.Start();
        //         return;
        //     }});
        
        var publishTask = await Props.Properties.PublishOnDBus(dbus);
        
        //run publish and command-handler and end the program if exit is called or an exception occurs
        // await Task.WhenAny(commandHandler, publishTask);
        //TODO use second connection for second task
       
        return 0;
    }

    private static async Task<String> ChooseFromNames(DBusConnection dbus)
    {
        var names = (await dbus.ListNames()).Where(name => !name.StartsWith(":") && name != "org.freedesktop.DBus").ToList();
        var choice = "Choose name to test as:".ChooseFrom(chooseFrom: names);
        if (choice == null) Environment.Exit(0);
        return  choice;
    }
    //
    // private static Boolean ProcessLocalCommand(String cmd)
    //     {
    //         switch (cmd.Split(" "))
    //         {
    //             case { } a when a[0] == "/exit":
    //                 //end program by ending the loop
    //                 return true;
    //             
    //             case { } b when b[0] == ("/set"):
    //                 //set property at first argument to value of second argument
    //                 Props.Properties.Set(b[1], b[2]);
    //                 break;
    //             
    //             case { } c when c[0] == ("/get"):
    //                 //Get Value of property at first argument
    //                 Console.WriteLine(Props.Properties.Get(c[1]));
    //                 break;
    //         }
    //
    //         //continue the loop
    //         return false;
    // }
}