using System;
using System.Collections.Generic;
using Sandbox.ModAPI;
using VRage;
using VRage.Game.ModAPI;
using VRage.Utils;
using VRageMath;

namespace SENetworkAPI
{
    public class Server : NetworkAPI
    {
	    /// <summary>
	    ///     Server class contains a few server only feature beond what is inharited from the NetworkAPI
	    /// </summary>
	    /// <param name="comId">Identifies the channel to pass information to and from this mod</param>
	    /// <param name="keyword">identifies what chat entries should be captured and sent to the server</param>
	    public Server(ushort comId, string modName, string keyword = null) : base(comId, modName, keyword)
        {
        }

	    /// <summary>
	    ///     Sends a command packet to the client(s)
	    /// </summary>
	    /// <param name="commandString">The command to be executed</param>
	    /// <param name="message">Text that will be displayed in client chat</param>
	    /// <param name="data">A serialized object to be sent across the network</param>
	    /// <param name="sent">The date timestamp this command was sent</param>
	    /// <param name="steamId">The client reciving this packet (if 0 it sends to all clients)</param>
	    /// <param name="isReliable">Enture delivery of the packet</param>
	    public override void SendCommand(string commandString, string message = null, byte[] data = null,
            DateTime? sent = null, ulong steamId = ulong.MinValue, bool isReliable = true)
        {
            SendCommand(
                new Command
                {
                    SteamId = steamId, CommandString = commandString, Message = message, Data = data,
                    Timestamp = sent == null ? DateTime.UtcNow.Ticks : sent.Value.Ticks
                }, steamId, isReliable);
        }

	    /// <summary>
	    /// </summary>
	    /// <param name="commandString">Sends a command packet to the client(s)</param>
	    /// <param name="point">the center of the sync location</param>
	    /// <param name="radius">the distance the message reaches (defaults to sync distance)</param>
	    /// <param name="message">Text that will be displayed in client chat</param>
	    /// <param name="data">A serialized object to be sent across the network</param>
	    /// <param name="sent">The date timestamp this command was sent</param>
	    /// <param name="steamId">The client reciving this packet (if 0 it sends to all clients)</param>
	    /// <param name="isReliable">Enture delivery of the packet</param>
	    public override void SendCommand(string commandString, Vector3D point, double radius = 0, string message = null,
            byte[] data = null, DateTime? sent = null, ulong steamId = ulong.MinValue, bool isReliable = true)
        {
            SendCommand(
                new Command
                {
                    SteamId = steamId, CommandString = commandString, Message = message, Data = data,
                    Timestamp = sent == null ? DateTime.UtcNow.Ticks : sent.Value.Ticks
                }, point, radius, steamId, isReliable);
        }

	    /// <summary>
	    ///     Sends a command packet to a list of clients
	    /// </summary>
	    /// <param name="steamIds"></param>
	    /// <param name="commandString">The command to be executed</param>
	    /// <param name="message">Text that will be displayed in client chat</param>
	    /// <param name="data">A serialized object to be sent across the network</param>
	    /// <param name="sent">The date timestamp this command was sent</param>
	    /// <param name="isReliable">Enture delivery of the packet</param>
	    public void SendCommandTo(ulong[] steamIds, string commandString, string message = null, byte[] data = null,
            DateTime? sent = null, bool isReliable = true)
        {
            foreach (var id in steamIds)
                SendCommand(
                    new Command
                    {
                        SteamId = id, CommandString = commandString, Message = message, Data = data,
                        Timestamp = sent == null ? DateTime.UtcNow.Ticks : sent.Value.Ticks
                    }, id, isReliable);
        }

	    /// <summary>
	    ///     Sends a command packet to the client(s)
	    /// </summary>
	    /// <param name="cmd">The object to be sent to the client</param>
	    /// <param name="steamId">The players steam id</param>
	    /// <param name="isReliable">Make sure the data arrives</param>
	    internal override void SendCommand(Command cmd, ulong steamId = ulong.MinValue, bool isReliable = true)
        {
            if (cmd.Data != null && cmd.Data.Length > CompressionThreshold)
            {
                cmd.Data = MyCompression.Compress(cmd.Data);
                cmd.IsCompressed = true;
            }

            if (!string.IsNullOrWhiteSpace(cmd.Message) && MyAPIGateway.Multiplayer.IsServer &&
                MyAPIGateway.Session != null) MyAPIGateway.Utilities.ShowMessage(ModName, cmd.Message);

            var packet = MyAPIGateway.Utilities.SerializeToBinary(cmd);

            if (LogNetworkTraffic)
                MyLog.Default.Info(
                    $"[NetworkAPI] TRANSMITTING Bytes: {packet.Length}  Command: {cmd.CommandString}  User: {steamId}");

            if (steamId == ulong.MinValue)
                MyAPIGateway.Multiplayer.SendMessageToOthers(ComId, packet, isReliable);
            else
                MyAPIGateway.Multiplayer.SendMessageTo(ComId, packet, steamId, isReliable);
        }

	    /// <summary>
	    ///     Sends a command packet to the client(s)
	    /// </summary>
	    /// <param name="cmd">The object to be sent to the client</param>
	    /// <param name="point">the center of the sync location</param>
	    /// <param name="radius">the distance the message reaches (defaults to sync distance)</param>
	    /// <param name="steamId">The players steam id</param>
	    /// <param name="isReliable">Make sure the data arrives</param>
	    internal override void SendCommand(Command cmd, Vector3D point, double radius = 0,
            ulong steamId = ulong.MinValue, bool isReliable = true)
        {
            if (cmd.Data != null && cmd.Data.Length > CompressionThreshold)
            {
                cmd.Data = MyCompression.Compress(cmd.Data);
                cmd.IsCompressed = true;
            }

            if (radius == 0) radius = MyAPIGateway.Session.SessionSettings.SyncDistance;

            var players = new List<IMyPlayer>();
            if (steamId == ulong.MinValue)
                MyAPIGateway.Players.GetPlayers(players,
                    p => (p.GetPosition() - point).LengthSquared() < radius * radius && p.SteamUserId != cmd.SteamId);
            else
                MyAPIGateway.Players.GetPlayers(players, p => p.SteamUserId == steamId);

            if (!string.IsNullOrWhiteSpace(cmd.Message) && MyAPIGateway.Multiplayer.IsServer &&
                MyAPIGateway.Session != null) MyAPIGateway.Utilities.ShowMessage(ModName, cmd.Message);

            cmd.Timestamp = DateTime.UtcNow.Ticks;
            var packet = MyAPIGateway.Utilities.SerializeToBinary(cmd);

            if (LogNetworkTraffic)
                MyLog.Default.Info(
                    $"[NetworkAPI] _TRANSMITTING_ Bytes: {packet.Length}  Command: {cmd.CommandString}  To: {players.Count} Users within {radius}m");

            foreach (var player in players)
                MyAPIGateway.Multiplayer.SendMessageTo(ComId, packet, player.SteamUserId, isReliable);
        }

        public override void Say(string message)
        {
            SendCommand(null, message);
        }
    }
}