using System;
using System.Reflection;
//using Microsoft.Win32;

using IllusionPlugin;
using GamecraftModdingAPI.Events;
using GamecraftModdingAPI.Commands;
using Discord;

namespace GamecraftRPC
{
	public class Plugin : IPlugin // the Illusion Plugin Architecture (IPA) will ignore classes that don't implement IPlugin'
	{
		public string Name { get; } = Assembly.GetExecutingAssembly().GetName().Name;

		public string Version { get; } = Assembly.GetExecutingAssembly().GetName().Version.ToString();

		private static readonly long CLIENT_ID =
#if DEBUG
        692733325902872619;
#else
        696732441012076605;
#endif

        private Discord.Discord discordRPC;

        // called when Gamecraft shuts down
		public void OnApplicationQuit()
		{
            // Shutdown this mod
            if (discordRPC != null)
            {
                discordRPC.GetActivityManager().ClearActivity((result) => { GamecraftModdingAPI.Utility.Logging.LogDebug($"Cleared status: {result}"); });
                discordRPC.Dispose();
            }
			GamecraftModdingAPI.Utility.Logging.LogDebug($"{Name} has shutdown");

            // Shutdown the Gamecraft modding API last
			GamecraftModdingAPI.Main.Shutdown();
		}

        // called when Gamecraft starts up
		public void OnApplicationStart()
		{
            // Initialize the Gamecraft modding API first
			GamecraftModdingAPI.Main.Init();

			// detect Wine (maybe?)
			bool isWineDetected = false;
			foreach (var key in Microsoft.Win32.Registry.CurrentUser.OpenSubKey("Software").GetSubKeyNames())
			{
                if (key == "Wine")
				{
					isWineDetected = true;
					break;
				}
			}
			if (isWineDetected)
			{
				// check for or install fake Discord
				GamecraftModdingAPI.Utility.Logging.MetaLog("\n--------------------------------\n\nIt looks like you may be using Wine/Proton, cool!\nPlease install https://github.com/0e4ef622/wine-discord-ipc-bridge to get this to work.\n\n--------------------------------");
			}
			

            // Initialize this mod
            discordRPC = new Discord.Discord(CLIENT_ID, (UInt64)Discord.CreateFlags.Default);
            discordRPC.SetLogHook(LogLevel.Debug, (_, msg) => { GamecraftModdingAPI.Utility.Logging.MetaLog(msg); });

            discordRPC.GetRelationshipManager().OnRefresh += () =>
            {
                discordRPC.GetRelationshipManager().Filter((ref Relationship r) => { return r.Presence.Status == Status.Online && r.Type == RelationshipType.Friend; });

                PresenceUtility.Users = new Relationship[discordRPC.GetRelationshipManager().Count()];
                for (uint i = 0; i < discordRPC.GetRelationshipManager().Count(); i++)
                {
                    PresenceUtility.Users[i] = discordRPC.GetRelationshipManager().GetAt(i);
                }
            };

            SetDiscordActivity(discordRPC, state: "Loading...", details: "Initializing Gamecraft", start: (int)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds);

            EventManager.AddEventHandler(new Events.GamePresenceHandler(discordRPC));
            EventManager.AddEventHandler(new Events.MenuPresenceHandler(discordRPC));
            EventManager.AddEventHandler(new Events.EditPresenceHandler(discordRPC));
            EventManager.AddEventHandler(new Events.SimulatePresenceHandler(discordRPC));

            SimpleCustomCommandEngine<string> rpcCommand = new SimpleCustomCommandEngine<string>(
				(s) => { SetDiscordActivity(discordRPC, state: s); }, // TODO: command action
				"SetRichPresence", // command name (used to invoke it in the console)
                "Set Discord status (experimental)" // command description (displayed when help command is executed)
			); // this command can also be executed using the Command Computer
            SimpleCustomCommandEngine listDiscordUsersCommand = new SimpleCustomCommandEngine(
                () =>
                {
                    string result = "Online Friends\n";
                    for (int i = 0; i < PresenceUtility.Users.Length; i++)
                    {
                        result += $"{PresenceUtility.Users[i].User.Username} ({PresenceUtility.Users[i].User.Id})\n";
                    }
                    GamecraftModdingAPI.Utility.Logging.CommandLog(result);
                },
                "ListDiscordUsers",
                "List online Discord friends");

            // register the command so the modding API knows about it
            CommandManager.AddCommand(rpcCommand);
            CommandManager.AddCommand(listDiscordUsersCommand);

            GamecraftModdingAPI.Utility.GameEngineManager.AddGameEngine(new Engines.PlayerCountEngine(discordRPC));

            GamecraftModdingAPI.Utility.Logging.LogDebug($"{Name} has started up");
		}

        // unused methods

		public void OnFixedUpdate() { } // called once per physics update

		public void OnLevelWasInitialized(int level) { } // called after a level is initialized

		public void OnLevelWasLoaded(int level) { } // called after a level is loaded

		public void OnUpdate() // called once per rendered frame (frame update)
		{
			if (discordRPC != null ) discordRPC.RunCallbacks();
		}

        public static void SetDiscordActivity(Discord.Discord discordRPC, string state = null, string details = null, int start = 0, int end = 0, string largeImg = "gamecraft-logo-g", string largeTxt = "Gamecraft", string smallImg = "exmods-logo-xm2", string smallTxt = "Exmods", string partyId = null, int partyCurrentSize = 0, int partyMaxSize = 0, string matchSecret = null, string joinSecret = null, string spectateSecret = null, bool instance = true, string debug = "")
        {
            if (discordRPC == null) return;

            ref Activity activity = ref PresenceUtility.Activity;
            activity.Instance = instance;

            if (state != null) activity.State = state;
            if (details != null) activity.Details = details;
            if (start != 0) activity.Timestamps.Start = start;
            if (end != 0) activity.Timestamps.End = end;
            if (!string.IsNullOrEmpty(largeImg))
            {
                activity.Assets.LargeImage = largeImg;
                activity.Assets.LargeText = largeTxt;
            }
            if (!string.IsNullOrEmpty(smallImg))
            {
                activity.Assets.SmallImage = smallImg;
                activity.Assets.SmallText = smallTxt;
            }
            if (!string.IsNullOrEmpty(partyId))
            {
                activity.Party.Id = partyId;
                activity.Party.Size.CurrentSize = partyCurrentSize;
                activity.Party.Size.MaxSize = partyMaxSize;
            }
            if (!string.IsNullOrEmpty(matchSecret) || !string.IsNullOrEmpty(joinSecret) || !string.IsNullOrEmpty(spectateSecret))
            {
                activity.Secrets.Match = matchSecret;
                activity.Secrets.Join = joinSecret;
                activity.Secrets.Spectate = spectateSecret;
            }

            discordRPC.GetActivityManager().UpdateActivity(activity, result =>
            {
                GamecraftModdingAPI.Utility.Logging.MetaLog($"Update Activity Result: {result} {debug}");
            });
        }

        public static void SetDiscordActivity(Discord.Discord discordRPC, Discord.Activity activity, string debug = "")
        {
            PresenceUtility.Activity = activity;
            discordRPC.GetActivityManager().UpdateActivity(PresenceUtility.Activity, result =>
            {
                GamecraftModdingAPI.Utility.Logging.MetaLog($"Update Activity Result: {result} {debug}");
            });
        }

        public static void SetDiscordActivity(Discord.Discord discordRPC, string debug = "")
        {
            discordRPC.GetActivityManager().UpdateActivity(PresenceUtility.Activity, result =>
            {
                GamecraftModdingAPI.Utility.Logging.MetaLog($"Update Activity Result: {result} {debug}");
            });
        }
	}
}