using System;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Text;

using HarmonyLib;
using IllusionInjector;
// test
using Svelto.ECS;
using RobocraftX.Blocks;
using RobocraftX.Common;
using RobocraftX.SimulationModeState;
using RobocraftX.FrontEnd;
using Unity.Mathematics;

using GamecraftModdingAPI.Commands;
using GamecraftModdingAPI.Events;
using GamecraftModdingAPI.Utility;
using GamecraftModdingAPI.Blocks;
using GamecraftModdingAPI.Players;

namespace GamecraftModdingAPI.Tests
{
    // unused by design
    /// <summary>
    /// Modding API implemented as a standalone IPA Plugin.
    /// Ideally, GamecraftModdingAPI should be loaded by another mod; not itself
    /// </summary>
    public class GamecraftModdingAPIPluginTest
#if DEBUG
        : IllusionPlugin.IEnhancedPlugin
#endif
    {      

        private static Harmony harmony { get; set; }

        public string[] Filter { get; } = new string[] { "Gamecraft", "GamecraftPreview" };

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

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

        public string HarmonyID { get; } = "org.git.exmods.modtainers.gamecraftmoddingapi";

        public void OnApplicationQuit()
        {
            GamecraftModdingAPI.Main.Shutdown();
        }

		public void OnApplicationStart()
		{
			FileLog.Reset();
			Harmony.DEBUG = true;
			GamecraftModdingAPI.Main.Init();
			Logging.MetaDebugLog($"Version group id {(uint)ApiExclusiveGroups.versionGroup}");
			// in case Steam is not installed/running
			// this will crash the game slightly later during startup
			//SteamInitPatch.ForcePassSteamCheck = true;
			// in case running in a VM
			//MinimumSpecsCheckPatch.ForcePassMinimumSpecCheck = true;
			// disable some Gamecraft analytics
			//AnalyticsDisablerPatch.DisableAnalytics = true;
			// disable background music
			Logging.MetaDebugLog("Audio Mixers: " + string.Join(",", AudioTools.GetMixers()));
			//AudioTools.SetVolume(0.0f, "Music"); // The game now sets this from settings again after this is called :(

			//Utility.VersionTracking.Enable();//(very) unstable

			// debug/test handlers
			HandlerBuilder.Builder()
						  .Name("appinit API debug")
						  .Handle(EventType.ApplicationInitialized)
						  .OnActivation(() => { Logging.Log("App Inited event!"); })
						  .Build();

			HandlerBuilder.Builder("menuact API debug")
						  .Handle(EventType.Menu)
						  .OnActivation(() => { Logging.Log("Menu Activated event!"); })
						  .OnDestruction(() => { Logging.Log("Menu Destroyed event!"); })
						  .Build();

			HandlerBuilder.Builder("menuswitch API debug")
						  .Handle(EventType.MenuSwitchedTo)
						  .OnActivation(() => { Logging.Log("Menu Switched To event!"); })
						  .Build();

			HandlerBuilder.Builder("gameact API debug")
						  .Handle(EventType.Menu)
						  .OnActivation(() => { Logging.Log("Game Activated event!"); })
						  .OnDestruction(() => { Logging.Log("Game Destroyed event!"); })
						  .Build();

			HandlerBuilder.Builder("gamerel API debug")
						  .Handle(EventType.GameReloaded)
						  .OnActivation(() => { Logging.Log("Game Reloaded event!"); })
						  .Build();

			HandlerBuilder.Builder("gameswitch API debug")
						  .Handle(EventType.GameSwitchedTo)
						  .OnActivation(() => { Logging.Log("Game Switched To event!"); })
						  .Build();

			HandlerBuilder.Builder("simulationswitch API debug")
						  .Handle(EventType.SimulationSwitchedTo)
						  .OnActivation(() => { Logging.Log("Game Mode Simulation Switched To event!"); })
						  .Build();

			HandlerBuilder.Builder("buildswitch API debug")
						  .Handle(EventType.BuildSwitchedTo)
						  .OnActivation(() => { Logging.Log("Game Mode Build Switched To event!"); })
						  .Build();

			HandlerBuilder.Builder("menu activated API error thrower test")
						  .Handle(EventType.Menu)
						  .OnActivation(() => { throw new Exception("Event Handler always throws an exception!"); })
						  .Build();

			/*HandlerBuilder.Builder("enter game from menu test")
						  .Handle(EventType.Menu)
						  .OnActivation(() =>
			{
				Tasks.Scheduler.Schedule(new Tasks.Repeatable(enterGame, shouldRetry, 0.2f));
			})
						  .Build();*/

			// debug/test commands
			if (Dependency.Hell("ExtraCommands"))
			{
				CommandBuilder.Builder()
							  .Name("Exit")
							  .Description("Close Gamecraft immediately, without any prompts")
							  .Action(() => { UnityEngine.Application.Quit(); })
							  .Build();

				CommandBuilder.Builder()
							  .Name("SetFOV")
							  .Description("Set the player camera's field of view")
							  .Action((float d) => { UnityEngine.Camera.main.fieldOfView = d; })
							  .Build();

				CommandBuilder.Builder()
					.Name("MoveLastBlock")
					.Description("Move the most-recently-placed block, and any connected blocks by the given offset")
					.Action((float x, float y, float z) =>
					{
						if (GameState.IsBuildMode())
							foreach (var block in Block.GetLastPlacedBlock().GetConnectedCubes())
								block.Position += new Unity.Mathematics.float3(x, y, z);
						else
							GamecraftModdingAPI.Utility.Logging.CommandLogError("Blocks can only be moved in Build mode!");
					}).Build();

				CommandBuilder.Builder()
							  .Name("PlaceAluminium")
							  .Description("Place a block of aluminium at the given coordinates")
							  .Action((float x, float y, float z) =>
							  {
								  var block = Block.PlaceNew(BlockIDs.AluminiumCube, new float3(x, y, z));
								  Logging.CommandLog("Block placed with type: " + block.Type);
							  })
							  .Build();

				CommandBuilder.Builder()
					.Name("PlaceAluminiumLots")
					.Description("Place a lot of blocks of aluminium at the given coordinates")
					.Action((float x, float y, float z) =>
					{
						Logging.CommandLog("Starting...");
						var sw = Stopwatch.StartNew();
						for (int i = 0; i < 100; i++)
							for (int j = 0; j < 100; j++)
								Block.PlaceNew(BlockIDs.AluminiumCube, new float3(x + i, y, z + j));
						//Block.Sync();
						sw.Stop();
						Logging.CommandLog("Finished in " + sw.ElapsedMilliseconds + "ms");
					})
					.Build();
				//With Sync(): 1135ms
				//Without Sync(): 134ms
				//Async: 348 794ms, doesn't freeze game
				//Without Sync() but wait for submission: 530ms
				//With Sync() at the end: 380ms

				Block b = null;
				CommandBuilder.Builder("moveBlockInSim", "Run in build mode first while looking at a block, then in sim to move it up")
					.Action(() =>
					{
						if (b == null)
						{
							b = new Player(PlayerType.Local).GetBlockLookedAt();
							Logging.CommandLog("Block saved: " + b);
						}
						else
							Logging.CommandLog("Block moved to: " + (b.GetSimBody().Position += new float3(0, 2, 0)));
					}).Build();

				CommandBuilder.Builder("Error", "Throw an error to make sure SimpleCustomCommandEngine's wrapper catches it.")
					.Action(() => { throw new Exception("Error Command always throws an error"); })
					.Build();

				CommandBuilder.Builder("ColorBlock",
						"Change color of the block looked at if there's any.")
					.Action<string>(str =>
					{
						if (!Enum.TryParse(str, out BlockColors color))
						{
							Logging.CommandLog("Color " + str + " not found! Interpreting as 4 color values.");
							var s = str.Split(' ');
							new Player(PlayerType.Local).GetBlockLookedAt().CustomColor = new float4(float.Parse(s[0]),
								float.Parse(s[1]), float.Parse(s[2]), float.Parse(s[3]));
							return;
						}
						new Player(PlayerType.Local).GetBlockLookedAt().Color =
							new BlockColor { Color = color };
						Logging.CommandLog("Colored block to " + color);

					}).Build();

				CommandBuilder.Builder("GetBlockByID", "Gets a block based on its object identifier and teleports it up.")
					.Action<char>(ch =>
					{
						foreach (var body in SimBody.GetFromObjectID(ch))
						{
							Logging.CommandLog("SimBody: " + body);
							body.Position += new float3(0, 10, 0);
							foreach (var bodyConnectedBody in body.GetConnectedBodies())
							{
								Logging.CommandLog("Moving " + bodyConnectedBody);
								bodyConnectedBody.Position += new float3(0, 10, 0);
							}
						}
					}).Build();

				GameClient.SetDebugInfo("InstalledMods", InstalledMods);
				Block.Placed += (sender, args) =>
					Logging.MetaDebugLog("Placed block " + args.Type + " with ID " + args.ID);
				Block.Removed += (sender, args) =>
					Logging.MetaDebugLog("Removed block " + args.Type + " with ID " + args.ID);

				/*
                CommandManager.AddCommand(new SimpleCustomCommandEngine<float>((float d) => { UnityEngine.Camera.main.fieldOfView = d; },
                    "SetFOV", "Set the player camera's field of view"));
                CommandManager.AddCommand(new SimpleCustomCommandEngine<float, float, float>(
                    (x, y, z) => {
                        bool success = GamecraftModdingAPI.Blocks.Movement.MoveConnectedBlocks(
                            GamecraftModdingAPI.Blocks.BlockIdentifiers.LatestBlockID,
                            new Unity.Mathematics.float3(x, y, z));
                        if (!success)
                        {
                            GamecraftModdingAPI.Utility.Logging.CommandLogError("Blocks can only be moved in Build mode!");
                        }
                    }, "MoveLastBlock", "Move the most-recently-placed block, and any connected blocks by the given offset"));
                CommandManager.AddCommand(new SimpleCustomCommandEngine<float, float, float>(
                    (x, y, z) => { Blocks.Placement.PlaceBlock(Blocks.BlockIDs.AluminiumCube, new Unity.Mathematics.float3(x, y, z)); },
                    "PlaceAluminium", "Place a block of aluminium at the given coordinates"));
				System.Random random = new System.Random(); // for command below
				CommandManager.AddCommand(new SimpleCustomCommandEngine(
					() => { 
					    if (!GameState.IsSimulationMode())
					    {
							Logging.CommandLogError("You must be in simulation mode for this to work!");
							return;
					    }
					    Tasks.Repeatable task = new Tasks.Repeatable(() => {
    						    uint count = 0;
						        EGID[] eBlocks = Blocks.Signals.GetElectricBlocks();
                                for (uint i = 0u; i < eBlocks.Length; i++)
                                {
							        uint[] ids = Blocks.Signals.GetSignalIDs(eBlocks[i]);
                                    for (uint j = 0u; j < ids.Length; j++)
                                    {
								        Blocks.Signals.SetSignalByID(ids[j], (float)random.NextDouble());
                                        count++;
                                    }
                                }
                                Logging.MetaDebugLog($"Did the thing on {count} inputs");
					        },
					                                                 () => { return GameState.IsSimulationMode(); });
						Tasks.Scheduler.Schedule(task);
					}, "RandomizeSignalsInputs", "Do the thing"));
			*/
			}

			// dependency test
			if (Dependency.Hell("GamecraftScripting", new Version("0.0.1.0")))
			{
				Logging.LogWarning("You're in GamecraftScripting dependency hell");
			}
			else
			{
				Logging.Log("Compatible GamecraftScripting detected");
			}

#if TEST
			TestRoot.RunTests();
#endif
		}

        private string modsString;
        private string InstalledMods()
        {
	        if (modsString != null) return modsString;
	        StringBuilder sb = new StringBuilder("Installed mods:");
	        foreach (var plugin in PluginManager.Plugins)
		        sb.Append("\n" + plugin.Name + " - " + plugin.Version);
	        return modsString = sb.ToString();
        }

		private bool retry = true;

        private bool shouldRetry()
		{
			return retry;
		}

        private void enterGame()
		{
			App.Client app = new App.Client();
			App.Game[] myGames = app.MyGames;
			Logging.MetaDebugLog($"MyGames count {myGames.Length}");
			if (myGames.Length != 0)
			{
				Logging.MetaDebugLog($"MyGames[0] EGID {myGames[0].EGID}");
				retry = false;
				try
				{
					//myGames[0].Description = "test msg pls ignore"; // make sure game exists first
					Logging.MetaDebugLog($"Entering game {myGames[0].Name}");
					myGames[0].EnterGame();
				}
				catch (Exception e)
				{
					Logging.MetaDebugLog($"Failed to enter game; exception: {e}");
					retry = true;
				}
			}
			else
			{
				Logging.MetaDebugLog("MyGames not populated yet :(");
			}
		}

        public void OnFixedUpdate() { }

        public void OnLateUpdate() { }

        public void OnLevelWasInitialized(int level) { }

        public void OnLevelWasLoaded(int level) { }

        public void OnUpdate() { }

        [HarmonyPatch]
        public class MinimumSpecsPatch
        {
	        public static bool Prefix()
	        {
		        return false;
	        }

	        public static MethodInfo TargetMethod()
	        {
		        return ((Action) MinimumSpecsCheck.CheckRequirementsMet).Method;
	        }
        }
    }
}