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

namespace KairoEngine.Stats.GameActions
{

    [System.Serializable, HideReferenceObjectPicker]
    public class StatChangeValueGameAction : GameActionBase
    {
        #region DefaultVariables
        public override string name { get => $"Change stat \'{statName}\' value by {statValueChange}"; }

        public override GameActionsController controller { 
            get => _controller; 
            set 
            {
                _controller = value;
                typeName = "StatChangeValueGameAction";
            }
        }
        public override string GetTypeName() => "StatChangeValueGameAction";
        public override string GetActionName() => "Stats/Change Stat Value";

        #endregion

        #region ActionVariables

        [FoldoutGroup("@name")] public string statName = "";

        [FoldoutGroup("@name")] public int statValueChange = +1;

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

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

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

        #endregion

        #region ActionFunctions

        public StatChangeValueGameAction(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)); 
        }

        #endregion

        #region Flow

        public override void Start()
        {
            StatsController stats = GetVariable<StatsController>(statsControllerVariable, null);
            if(stats != null)
            {
                Stat stat = stats.GetStat(statName);
                if(stat != null)
                {
                    stat.value += statValueChange;
                }
                else if(debugWarnings) Debug.LogWarning($"Stat \'{statName}\' could not be found in \'{statsControllerVariable}\'.");
            }
            else if(debugWarnings) Debug.LogWarning($"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 StatChangeValueGameAction Duplicate(GameActionsController controller = null)
        {
            StatChangeValueGameAction action = new StatChangeValueGameAction(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 StatChangeValueGameAction JSONToStatChangeValueGameAction(string data)
        {
            return JsonUtility.FromJson<StatChangeValueGameAction>(data);
        }

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

        #endregion
    }
}