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

namespace KairoEngine.Stats.GameActions
{
    public enum StatOperationType
    {
        Add,
        Remove
    }

    public enum StatModifierContextType
    {
        New,
        Variable
    }

    [System.Serializable, HideReferenceObjectPicker]
    public class StatModifierOperationsGameAction : GameActionBase
    {
        #region DefaultVariables
        public override string name { get => $"{operationType.ToString()} StatModifier \'{GetStatModifierText()}\'"; }

        public override GameActionsController controller { 
            get => _controller; 
            set 
            {
                _controller = value;
                typeName = "StatModifierOperationsGameAction";
            }
        }
        public override string GetTypeName() => "StatModifierOperationsGameAction";
        public override string GetActionName() => "Stats/ Stat Modifier Operation";

        #endregion

        #region ActionVariables

        
        [LabelText("Context"), HideInInspector] public StatModifierContextType statModifierContext = StatModifierContextType.New;

        [InlineProperty, HideLabel, HideReferenceObjectPicker, ShowIf("@statModifierContext == StatModifierContextType.New")] 
        [IconFoldoutGroup("@name", "Assets/Packages/Simple Vector Icons/PNG icons/Game PNG/Diamonds.png")] 
        public StatModifier statModifier = new StatModifier();

        [IconFoldoutGroup("@name"), LabelText("operation")] public StatOperationType operationType = StatOperationType.Add;

        [ValueDropdown("statsControllers", IsUniqueList = false), OnInspectorInit("GetCompatibleVariablenames"), LabelText("Target StatsController")]
        [IconFoldoutGroup("@name")]
        public string statsControllerVariable;

        private IEnumerable statsControllers = new ValueDropdownList<string>();

        [IconFoldoutGroup("@name")] public bool debugWarnings = false;

        

        #endregion

        #region ActionFunctions

        public StatModifierOperationsGameAction(GameActionsController controller) : base(controller)
        {
            this.controller = controller;
            className =  this.GetType().AssemblyQualifiedName;
        }

        private void GetCompatibleVariablenames()
        {
            statsControllers = _controller.context.variables
                .Where(x => x.GetVariableName() == "StatsController")
                .Select(x => new ValueDropdownItem(x.name, x.name)); 
        }

        public string GetStatModifierText()
        {
            if(statModifier == null) return "";
            else return statModifier.text;
        }

        #endregion

        #region Flow

        public override void Start()
        {
            StatsController stats = GetVariable<StatsController>(statsControllerVariable, null);
            if(stats != null)
            {
                if(statModifier != null)
                {
                    Stat stat = stats.GetStat(statModifier.statName);
                    if(stat == null && debugWarnings) Debug.LogWarning($"Could not find Stat \'{statModifier.statName}\' in StatsController.");
                    else
                    {
                        statModifier.enabled = true;
                        if(operationType == StatOperationType.Add) stat.modifiers.Add(statModifier);
                        else stat.modifiers.Remove(statModifier);
                    }
                }
                else if(debugWarnings) Debug.LogWarning($"StatModifier is empty in StatModifier operations Game Action.");
            }
            else if(debugWarnings) Debug.LogWarning($"Could not find StatsController with GameActionContextVariable named \'{statsControllerVariable}\'.");
            _done = true;
            _started = true;
        }

        public override void Update() { }

        public override void Restart()
        {
            _done = false;
            _started = false;
        }

        #endregion

        #region utilities

        private StatModifierOperationsGameAction Duplicate(GameActionsController controller = null)
        {
            StatModifierOperationsGameAction action = new StatModifierOperationsGameAction(controller == null ? this.controller : controller);
            action.controller = controller;
            return action;
        }

        private T GetVariable<T>(string title, T defaultValue)
        {
            for (int i = 0; i < controller.context.variables.Count; i++)
            {
                if(controller.context.variables[i].name == title)
                {
                    return controller.context.variables[i].GetValue<T>(defaultValue);
                }
            }
            return defaultValue;
        }

        #endregion

        #region Serialization

        public static StatModifierOperationsGameAction JSONToStatModifierOperationsGameAction(string data)
        {
            return JsonUtility.FromJson<StatModifierOperationsGameAction>(data);
        }

        public override void OnBeforeSerialize(GameActionObjectSerializer serializer, int n, int depth) { }
        public override void OnBeforeDeserialize(GameActionObjectSerializer serializer, int n, int depth) { }

        #endregion
    }
}