using OWML.Common;
using QSB.Utility;
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace QSB.WorldSync
{
	public static class QSBWorldSync
	{
		public static readonly List<CharacterDialogueTree> OldDialogueTrees = new();
		public static readonly Dictionary<string, bool> DialogueConditions = new();
		public static readonly List<FactReveal> ShipLogFacts = new();

		private static readonly List<IWorldObject> WorldObjects = new();
		private static readonly Dictionary<MonoBehaviour, IWorldObject> WorldObjectsToUnityObjects = new();

		public static IEnumerable<TWorldObject> GetWorldObjects<TWorldObject>()
			where TWorldObject : IWorldObject
			=> WorldObjects.OfType<TWorldObject>();

		public static TWorldObject GetWorldObject<TWorldObject>(this int objectId)
			where TWorldObject : IWorldObject
		{
			if (!WorldObjects.IsInRange(objectId))
			{
				DebugLog.ToConsole($"Warning - Tried to find {typeof(TWorldObject).Name} id {objectId}. Count is {WorldObjects.Count}.", MessageType.Warning);
				return default;
			}

			if (WorldObjects[objectId] is not TWorldObject worldObject)
			{
				DebugLog.ToConsole($"Error - {typeof(TWorldObject).Name} id {objectId} is actually {WorldObjects[objectId].GetType().Name}.", MessageType.Error);
				return default;
			}

			return worldObject;
		}

		public static TWorldObject GetWorldObject<TWorldObject>(this MonoBehaviour unityObject)
			where TWorldObject : IWorldObject
		{
			if (unityObject == null)
			{
				DebugLog.ToConsole($"Error - Trying to run GetWorldFromUnity with a null unity object! TWorldObject:{typeof(TWorldObject).Name}, TUnityObject:NULL, Stacktrace:\r\n{Environment.StackTrace}", MessageType.Error);
				return default;
			}

			if (!QSBCore.IsInMultiplayer)
			{
				DebugLog.ToConsole($"Warning - Trying to run GetWorldFromUnity while not in multiplayer! TWorldObject:{typeof(TWorldObject).Name}, TUnityObject:{unityObject.GetType().Name}, Stacktrace:\r\n{Environment.StackTrace}", MessageType.Warning);
				return default;
			}

			if (!WorldObjectsToUnityObjects.TryGetValue(unityObject, out var worldObject))
			{
				DebugLog.ToConsole($"Error - WorldObjectsToUnityObjects does not contain \"{unityObject.name}\"! TWorldObject:{typeof(TWorldObject).Name}, TUnityObject:{unityObject.GetType().Name}, Stacktrace:\r\n{Environment.StackTrace}", MessageType.Error);
				return default;
			}

			if (worldObject == null)
			{
				DebugLog.ToConsole($"Error - World object for unity object {unityObject.name} is null! TWorldObject:{typeof(TWorldObject).Name}, TUnityObject:{unityObject.GetType().Name}, Stacktrace:\r\n{Environment.StackTrace}", MessageType.Error);
				return default;
			}

			return (TWorldObject)worldObject;
		}

		public static void RemoveWorldObjects()
		{
			if (WorldObjects.Count == 0)
			{
				DebugLog.ToConsole($"Warning - Trying to remove WorldObjects, but there are no WorldObjects!", MessageType.Warning);
				return;
			}

			foreach (var item in WorldObjects)
			{
				try
				{
					item.OnRemoval();
				}
				catch (Exception e)
				{
					DebugLog.ToConsole($"Error - Exception in OnRemoval() for {item.GetType()}. Message : {e.Message}, Stack trace : {e.StackTrace}", MessageType.Error);
				}
			}

			WorldObjects.Clear();
			WorldObjectsToUnityObjects.Clear();
		}

		public static IEnumerable<TUnityObject> GetUnityObjects<TUnityObject>()
			where TUnityObject : MonoBehaviour
			=> Resources.FindObjectsOfTypeAll<TUnityObject>()
				.Where(x => x.gameObject.scene.name != null);

		public static void Init<TWorldObject, TUnityObject>()
			where TWorldObject : WorldObject<TUnityObject>, new()
			where TUnityObject : MonoBehaviour
		{
			var list = GetUnityObjects<TUnityObject>();
			Init<TWorldObject, TUnityObject>(list);
		}

		public static void Init<TWorldObject, TUnityObject>(params Type[] typesToExclude)
			where TWorldObject : WorldObject<TUnityObject>, new()
			where TUnityObject : MonoBehaviour
		{
			var list = GetUnityObjects<TUnityObject>().Where(x => !typesToExclude.Contains(x.GetType()));
			Init<TWorldObject, TUnityObject>(list);
		}

		public static void Init<TWorldObject, TUnityObject>(IEnumerable<TUnityObject> listToInitFrom)
			where TWorldObject : WorldObject<TUnityObject>, new()
			where TUnityObject : MonoBehaviour
		{
			//DebugLog.DebugWrite($"{typeof(TWorldObject).Name} init : {listToInitFrom.Count()} instances.", MessageType.Info);
			foreach (var item in listToInitFrom)
			{
				var obj = new TWorldObject
				{
					AttachedObject = item,
					ObjectId = WorldObjects.Count
				};

				obj.Init();
				WorldObjects.Add(obj);
				WorldObjectsToUnityObjects.Add(item, obj);
			}
		}

		public static void SetDialogueCondition(string name, bool state)
		{
			if (!QSBCore.IsHost)
			{
				DebugLog.ToConsole("Warning - Cannot write to condition dict when not server!", MessageType.Warning);
				return;
			}

			DialogueConditions[name] = state;
		}

		public static void AddFactReveal(string id, bool saveGame, bool showNotification)
		{
			if (!QSBCore.IsHost)
			{
				DebugLog.ToConsole("Warning - Cannot write to fact list when not server!", MessageType.Warning);
				return;
			}

			if (ShipLogFacts.Any(x => x.Id == id))
			{
				return;
			}

			ShipLogFacts.Add(new FactReveal
			{
				Id = id,
				SaveGame = saveGame,
				ShowNotification = showNotification
			});
		}
	}
}