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

namespace KairoEngine.Stats
{
    [System.Serializable]
    public class StatusEffect
    {
        [SerializeField, HideInInspector] private string name = "";
        [FoldoutGroup("@name")] public StatusEffectTemplate template;
        [FoldoutGroup("@name")] public Transform target;
        [FoldoutGroup("@name")] public Transform source;
        [FoldoutGroup("@name")] public int stack = 1;
        [SerializeField, HideInInspector] private List<GameActionsController> actionsControllerList;
        [SerializeField, HideInInspector] private GameActionContext context;
        [SerializeField, HideInInspector] private List<float> time;

        public StatusEffect(StatusEffectTemplate template, Transform target = null, 
            Transform source = null, StatsController statsController = null)
        {
            this.stack = 1;
            this.name = $"{template.title} ({stack})";
            this.time = new List<float>();
            this.time.Add(0);
            this.target = target;
            this.source = source;
            this.template = template;
            this.actionsControllerList = new List<GameActionsController>();
            this.actionsControllerList.Add(template.onAddController.Duplicate());
            this.actionsControllerList.Add(template.onStackController.Duplicate());
            this.actionsControllerList.Add(template.onWhileController.Duplicate());
            this.actionsControllerList.Add(template.onDestackController.Duplicate());
            this.actionsControllerList.Add(template.onRemoveController.Duplicate());
            this.context = template.context.Duplicate();
            foreach (var ctrl in actionsControllerList) ctrl.context = this.context;
            // Set Game Action Variables
            var targetVar = context.GetVariable("Target GameObject");
            if(targetVar != null) ((GameActionContextGameObject)targetVar).value = this.target.gameObject;
            var statsVar = context.GetVariable("Stats");
            if(statsVar != null) ((GameActionContextStatsController)statsVar).value = statsController;
            actionsControllerList[0].Start(); // Run the OnAdd actions
        }

        public void AddToStack()
        {
            if(template.maxStack <= stack) return;
            this.stack += 1;
            this.name = $"{template.title} ({stack})";
            this.time.Add(0);
            this.actionsControllerList[1].Restart();
            this.actionsControllerList[1].Start(); // Run the OnStack actions
        }

        public void OnRemove()
        {
            this.actionsControllerList[4].Start(); // Run OnRemove actions
        }

        /// <summary>Update times for each unit in the stack. If a unit has reached the template duration, 
        /// it is removed from the stack and the OnDestack actions are run. </summary>
        /// <param name="elapsed">How much time has passed since the last update. Just pass Time.deltaTime.</param>
        public void Update(float elapsed)
        {
            if(this.template.hasDuration == false) return;
            for (int i = 0; i < this.time.Count; i++) this.time[i] += elapsed;
            for (int i = 0; i < this.time.Count; i++)
            {
                if(this.time[i] > template.duration)
                {
                    this.time.RemoveAt(i);
                    this.stack -= 1;
                    this.name = $"{template.title} ({stack})";
                    if(stack > 0)
                    {
                        this.actionsControllerList[3].Restart();
                        this.actionsControllerList[3].Start(); // Tun OnDestack actions;
                    } 
                    else OnRemove();
                    
                    
                }
            }
            if(this.actionsControllerList[2].isDone || !this.actionsControllerList[2].started)
            {
                this.actionsControllerList[2].Restart();
                this.actionsControllerList[2].Start(); // Run OnWhile actions
            }
            
        }
    }
}