using System;
using System.Reflection;

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 = 692733325902872619;

        private Discord.Discord discordRPC;

        // called when Gamecraft shuts down
		public void OnApplicationQuit()
		{
            // Shutdown this mod
			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();

            // Initialize this mod
            discordRPC = new Discord.Discord(CLIENT_ID, (UInt64)Discord.CreateFlags.Default);

            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

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

            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", bool instance = true)
        {
            if (discordRPC == null) return;

            Activity activity = new 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;
            }

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