namespace Server.Engines.Chat
{
    public class ChatActionHandlers
    {
        private static readonly ChatActionHandler[] m_Handlers;

        static ChatActionHandlers()
        {
            m_Handlers = new ChatActionHandler[0x100];

            Register(0x43, true, LeaveChannel);
            Register(0x61, true, ChannelMessage);
            Register(0x62, false, JoinChannel);
            Register(0x63, false, CreateChannel);
        }

        public static void Register(int actionId, bool requireConference, OnChatAction callback)
        {
            if (actionId >= 0 && actionId < m_Handlers.Length)
                m_Handlers[actionId] = new ChatActionHandler(requireConference, callback);
        }

        public static ChatActionHandler GetHandler(int actionId)
        {
            if (actionId >= 0 && actionId < m_Handlers.Length)
                return m_Handlers[actionId];

            return null;
        }

        public static void ChannelMessage(ChatUser from, Channel channel, string param)
        {
            if (from.NextMessage < Core.TickCount)
            {
                channel.SendMessage(57, from, from.GetColorCharacter() + from.Username, string.Format("{{{0}}} {1}", channel.Name, param)); // %1: %2
                ChatLogging.LogMessage(channel.Name, from.Username, param);

                from.NextMessage = Core.TickCount + ChatSystem.ChatDelay;
            }
        }

        public static void LeaveChannel(ChatUser from, Channel channel, string param)
        {
            channel.RemoveUser(from);
        }

        public static void JoinChannel(ChatUser from, Channel channel, string param)
        {
            string name;
            string password = null;

            int start = param.IndexOf('\"');

            if (start >= 0)
            {
                int end = param.IndexOf('\"', ++start);

                if (end >= 0)
                {
                    name = param.Substring(start, end - start);
                    password = param.Substring(++end);
                }
                else
                {
                    name = param.Substring(start);
                }
            }
            else
            {
                int indexOf = param.IndexOf(' ');

                if (indexOf >= 0)
                {
                    name = param.Substring(0, indexOf++);
                    password = param.Substring(indexOf);
                }
                else
                {
                    name = param;
                }
            }

            CreateAndJoin(from, name);
        }

        public static void CreateChannel(ChatUser from, Channel channel, string param)
        {
            CreateAndJoin(from, param);
        }

        private static void CreateAndJoin(ChatUser from, string name)
        {
            Channel joined = Channel.FindChannelByName(name);

            if (joined == null)
            {
                if (ChatSystem.AllowCreateChannels)
                {
                    from.Mobile.SendMessage("You have created the channel {0}", name);
                    joined = Channel.AddChannel(name);
                }
                else
                {
                    from.Mobile.SendMessage("Channel creation is not allowed right now. Switching to default channel...");
                    joined = Channel.Default;
                }
            }

            joined.AddUser(from);
        }
    }
}