using System;
using System.Collections.Generic;
using Server.Network;

namespace Server.Commands.Generic
{
  public class OnlineCommandImplementor : BaseCommandImplementor
  {
    public OnlineCommandImplementor()
    {
      Accessors = new[] { "Online" };
      SupportRequirement = CommandSupport.Online;
      SupportsConditionals = true;
      AccessLevel = AccessLevel.GameMaster;
      Usage = "Online <command> [condition]";
      Description =
        "Invokes the command on all mobiles that are currently logged in. Optional condition arguments can further restrict the set of objects.";
    }

    public override void Compile(Mobile from, BaseCommand command, ref string[] args, ref object obj)
    {
      try
      {
        Extensions ext = Extensions.Parse(from, ref args);

        if (!CheckObjectTypes(from, command, ext, out bool _, out bool mobiles))
          return;

        if (!mobiles) // sanity check
        {
          command.LogFailure("This command does not support items.");
          return;
        }

        List<object> list = new List<object>();

        List<NetState> states = TcpServer.Instances;

        for (int i = 0; i < states.Count; ++i)
        {
          NetState ns = states[i];
          Mobile mob = ns.Mobile;

          if (mob == null)
            continue;

          if (!BaseCommand.IsAccessible(from, mob))
            continue;

          if (ext.IsValid(mob))
            list.Add(mob);
        }

        ext.Filter(list);

        obj = list;
      }
      catch (Exception ex)
      {
        from.SendMessage(ex.Message);
      }
    }
  }
}