using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Sirenix.OdinInspector;
using KairoEngine.Core;

namespace KairoEngine.Core.GameActions
{
    [System.Serializable]
    public class GameActionContext : ISerializationCallbackReceiver
    {
        [ListDrawerSettings(HideAddButton = true, HideRemoveButton = false, DraggableItems = false, Expanded = false, ShowPaging = false, ShowItemCount = true)]
        [ShowInInspector]
        public List<GameActionContextVariable> variables = new List<GameActionContextVariable>();

        public bool HasVariable(string variableName)
        {
            for (int i = 0; i < variables.Count; i++)
            {
                if(variables[i].name == variableName) return true;
            }
            return false;
        }

        public GameActionContextVariable GetVariable(string title)
        {
            foreach (var variable in variables)
            {
                if(variable.name == title) return variable;
            }
            return null;
        }

        public void AddVariable(GameActionContextVariable variable)
        {
            for (int i = 0; i < variables.Count; i++)
            {
                if(variables[i].name == variable.name) 
                {
                    variables[i] = variable;
                    return;
                }
            }
            variables.Add(variable);
        }

        #region Serialization

        [SerializeField, HideInInspector] private List<string> serializedVariables = new List<string>();
        [SerializeField, HideInInspector] public GameActionObjectSerializer objectSerializer = new GameActionObjectSerializer();

        private void SerializeActions()
        {
            serializedVariables = new List<string>();
            objectSerializer.ClearGameObjects();
            foreach (var variable in variables)
            {
                variable.className = variable.GetType().AssemblyQualifiedName;
                variable.typeName = variable.GetTypeName();
                variable.OnBeforeSerialize(objectSerializer);
                string data = JsonUtility.ToJson(variable);
                serializedVariables.Add(data);
            }
        }

        private void DeserializeActions()
        {
            if(serializedVariables == null) return;
            foreach (var data in serializedVariables)
            {
                GameActionContextVariable variable = JsonUtility.FromJson<GameActionContextVariableBase>(data);
                variable = GameActionContextVariable.InvokeStringMethod(variable.className, variable.typeName, data);
                variable.OnBeforeDeserialize(objectSerializer);
                AddVariable(variable);
            }
            objectSerializer.ClearGameObjects();
        }

        public void OnBeforeSerialize() => SerializeActions();
        public void OnAfterDeserialize() => DeserializeActions();

        #endregion

        #region NewVariable

        [OnInspectorInit("GetCompatibleVariablenames"), OnValueChanged("AddNewVariable")]
        [ValueDropdown("possibleVariables", IsUniqueList = false)]
        [LabelText("Add New Variable")]
        [NonSerialized]
        public GameActionContextVariable newVariable;

        [NonSerialized] private IEnumerable possibleVariables = new ValueDropdownList<GameActionContextVariable>();

        private void GetCompatibleVariablenames()
        {
            possibleVariables = ReflectiveEnumerator.GetEnumerableOfType<GameActionContextVariable>()
                .Where(x => x.GetTypeName() != "GameActionContextVariable")
                .Where(x => x.GetTypeName() != "GameActionContextVariableBase")
                .Select(x => new ValueDropdownItem(x.GetVariableName(), x));
        }

        private void AddNewVariable()
        {
            if(newVariable != null)
            {
                newVariable.className = newVariable.GetType().AssemblyQualifiedName;
                variables.Add(newVariable);
                newVariable = null;
            }
        }

        #endregion

        #region Utlilities

        public GameActionContext Duplicate()
        {
            GameActionContext newContext = new GameActionContext();
            var newSerializedVariables = new List<string>();
            newContext.objectSerializer = new GameActionObjectSerializer();
            foreach (var variable in variables)
            {
                variable.className = variable.GetType().AssemblyQualifiedName;
                variable.typeName = variable.GetTypeName();
                variable.OnBeforeSerialize(newContext.objectSerializer);
                string data = JsonUtility.ToJson(variable);
                newSerializedVariables.Add(data);
            }
            foreach (var data in newSerializedVariables)
            {
                GameActionContextVariable variable = JsonUtility.FromJson<GameActionContextVariableBase>(data);
                variable = GameActionContextVariable.InvokeStringMethod(variable.className, variable.typeName, data);
                variable.OnBeforeDeserialize(newContext.objectSerializer);
                newContext.AddVariable(variable);
            }
            newContext.objectSerializer.ClearGameObjects();
            return newContext;
        }

        #endregion
    }
}