using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using SUISS.Core;
using SUISS.Storage;

namespace SUISSEngine
{
	public abstract class AbstractState<T> : SingletonMonobehaviour<T> where T : AbstractState<T>
	{
		public static FieldInfo GetFieldFromHandle(RuntimeFieldHandle handle)
		{
			return FieldInfo.GetFieldFromHandle(handle);
		}

		//[DebuggerBrowsable(DebuggerBrowsableState.Never)]
		public event AbstractState<T>.ValueChangedHandler ValueChangedEvent;

		//[DebuggerBrowsable(DebuggerBrowsableState.Never)]
		public event AbstractState<T>.AnyValueChangedHandler AnyValueChangedEvent;

		public void FireValueChangedHandler(string key, object oldValue, object newValue)
		{
			if (this.ValueChangedEvent != null)
			{
				this.ValueChangedEvent(key, oldValue, newValue);
			}
			if (this.AnyValueChangedEvent != null)
			{
				this.AnyValueChangedEvent();
			}
		}

		public void FireAnyValueChangedEvent()
		{
			if (this.AnyValueChangedEvent != null)
			{
				this.AnyValueChangedEvent();
			}
		}

		protected Dictionary<string, object> Persistent
		{
			get
			{
				if (this.persistentDictionary == null)
				{
					if (!this.persistent.ContainsKey("dictionary"))
					{
						this.persistent.Add("dictionary", new Dictionary<string, object>());
					}
					this.persistentDictionary = (Dictionary<string, object>)this.persistent["dictionary"];
				}
				return this.persistentDictionary;
			}
		}

		protected override void Awake()
		{
			base.Awake();
			this.storage = Storage.Get(this.GetLifecycle());
			this.loadState();
		}

		protected virtual void Start()
		{
		}

		protected override void OnDestroy()
		{
			base.OnDestroy();
			this.ValueChangedEvent = null;
			if (this.storage != null)
			{
				this.storage.OnSync -= this.syncToStorage;
			}
		}

		public virtual V GetValue<V>(string key, V defaultvalue)
		{
			V result = defaultvalue;
			object obj;
			if (this.Persistent.TryGetValue(key, out obj) && obj is V)
			{
				result = (V)((object)obj);
			}
			return result;
		}

		public virtual object GetValue(string key, object defaultValue)
		{
			object result;
			if (!this.Persistent.TryGetValue(key, out result))
			{
				result = defaultValue;
			}
			return result;
		}

		public virtual void SetValue(string key, object value)
		{
			if (this.isNewState)
			{
				this.Persistent[key] = value;
			}
			else
			{
				object obj;
				if (!this.Persistent.TryGetValue(key, out obj))
				{
					obj = null;
				}
				if (!object.Equals(obj, value))
				{
					this.Persistent[key] = value;
					this.OnValueChanged(key, obj, value);
				}
			}
		}

		protected virtual void OnValueChanged(string key, object oldValue, object newValue)
		{
			this.FireValueChangedHandler(key, oldValue, newValue);
		}

		private void loadState()
		{
			if (this.storage.Root.ContainsKey(this.GetStorageKey()))
			{
				this.persistent = (Dictionary<string, object>)this.storage.Root[this.GetStorageKey()];
				if (!this.persistent.ContainsKey("dictionary"))
				{
					this.persistent["dictionary"] = new Dictionary<string, object>();
				}
				this.persistentDictionary = (Dictionary<string, object>)this.persistent["dictionary"];
				if (!this.persistent.ContainsKey("fields"))
				{
					this.persistent["fields"] = new Dictionary<string, object>();
				}
				this.persistentFields = (Dictionary<string, object>)this.persistent["fields"];
				this.syncToFields();
				this.storage.OnSync += this.syncToStorage;
			}
			else
			{
				this.persistent = new Dictionary<string, object>();
				this.persistentFields = new Dictionary<string, object>();
				this.persistent["fields"] = this.persistentFields;
				this.persistentDictionary = new Dictionary<string, object>();
				this.persistent["dictionary"] = this.persistentDictionary;
				this.storage.Root[this.GetStorageKey()] = this.persistent;
				this.storage.OnSync += this.syncToStorage;
				this.isNewState = true;
				this.OnNewGameState();
				this.isNewState = false;
			}
		}

		private void reflectOnPersistentFields()
		{
			this.persistentFieldHandles = new List<RuntimeFieldHandle>();
			Type type = base.GetType();
			FieldInfo[] fields = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy);
			foreach (FieldInfo fieldInfo in fields)
			{
				if (fieldInfo.IsDefined(typeof(PersistentAttribute), false))
				{
					this.persistentFieldHandles.Add(fieldInfo.GetFieldHandle());
				}
			}
		}

		private Dictionary<string, object> getFieldsDictionary()
		{
			if (this.persistentFields == null && !this.persistent.ContainsKey("fields"))
			{
				this.persistent.Add("fields", new Dictionary<string, object>());
				this.persistentFields = (Dictionary<string, object>)this.persistent["fields"];
			}
			return this.persistentFields;
		}

		private void syncToStorage()
		{
			if (this.persistentFieldHandles == null)
			{
				this.reflectOnPersistentFields();
			}
			if (this.persistent != null)
			{
				Dictionary<string, object> fieldsDictionary = this.getFieldsDictionary();
				foreach (RuntimeFieldHandle handle in this.persistentFieldHandles)
				{
					FieldInfo fieldFromHandle = AbstractState<T>.GetFieldFromHandle(handle);
					fieldsDictionary[fieldFromHandle.Name] = fieldFromHandle.GetValue(this);
				}
			}
		}

		private void syncToFields()
		{
			if (this.persistentFieldHandles == null)
			{
				this.reflectOnPersistentFields();
			}
			if (this.persistent != null)
			{
				Dictionary<string, object> fieldsDictionary = this.getFieldsDictionary();
				foreach (RuntimeFieldHandle handle in this.persistentFieldHandles)
				{
					FieldInfo fieldFromHandle = AbstractState<T>.GetFieldFromHandle(handle);
					if (fieldsDictionary.ContainsKey(fieldFromHandle.Name))
					{
						fieldFromHandle.SetValue(this, fieldsDictionary[fieldFromHandle.Name]);
					}
				}
			}
		}

		protected abstract void OnNewGameState();

		protected abstract string GetStorageKey();

		protected abstract StorageLifecycle GetLifecycle();

		private const string DictionaryKey = "dictionary";

		private const string FieldsKey = "fields";

		private Dictionary<string, object> persistent;

		private Dictionary<string, object> persistentDictionary;

		private Dictionary<string, object> persistentFields;

		private List<RuntimeFieldHandle> persistentFieldHandles;

		private Storage storage;

		protected bool isNewState;

		public delegate void ValueChangedHandler(string key, object oldValue, object newValue);

		public delegate void AnyValueChangedHandler();
	}
}