using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;


public class CommandInterpreter
{
    public readonly Dictionary<string, ICommand> _commands = new();

    public CommandInterpreter()
    {

        RegisterCommand(new GreetCommand());
        RegisterCommand(new HelpCommand(this));

    }
    public void RegisterCommand(ICommand command)
    {

        _commands[command.Name.ToLower()] = command;

    }

    public void Execute(string input)
    {
        string[] parts = input.Split(" ", StringSplitOptions.RemoveEmptyEntries);
        if (parts.Length == 0) return;

        string commandName = parts[0].ToLower();
        string[] args = parts.Length > 1 ? parts[1..] : new string[0];

        if (_commands.TryGetValue(commandName, out var command))
        {

            command.Execute(args);

        }
        else
        {
            Console.WriteLine("Err - uknown Command : '{commandName}'. Type help For a list of commands");
        }


    }

    public IEnumerable<ICommand> GetAllCommands()
    {

        return _commands.Values;

    }


}