using System;
using UnityEngine;
using UnityEngine.EventSystems;

namespace QFramework
{
    public class UIClickCondition : ICondition
    {
        private Func<bool> mCondition;

        private static SimpleObjectPool<UIClickCondition> mSimpleObjectPool =
            new SimpleObjectPool<UIClickCondition>(() => new UIClickCondition(), null, 10);

        private UIClickCondition() { }
        public GameObject obj = null;
        string uiPath = string.Empty;
        public static UIClickCondition Allocate(string uiPath)
        {
            var conditionAction = mSimpleObjectPool.Allocate();
            conditionAction.ActionID = ActionKit.ID_GENERATOR++;
            conditionAction.Deinited = false;
            conditionAction.Reset();
            conditionAction.mCondition = conditionAction.Check;
            conditionAction.uiPath = uiPath;
            return conditionAction;
        }
        public bool Check()
        {
            if (obj == null)
            {
#if VR
                if (uiPath.Contains("UIRoot/"))
                {
                    uiPath = uiPath.Replace("UIRoot/", "UIRoot/ZCameraRig/ZCanvas/");
                }
#endif
                obj = Utility.FindObj(uiPath);
            }
#if VR
            if (obj != null && Input.GetMouseButtonUp(0))
#else
            if (obj != null && Input.GetMouseButtonUp(0) && EventSystem.current.IsPointerOverGameObject())
#endif
            {
                return obj == EventSystem.current.currentSelectedGameObject;
            }
            return false;
        }
        public bool Paused { get; set; }
        public bool Deinited { get; set; }
        public ulong ActionID { get; set; }
        public ActionStatus Status { get; set; }
        public void OnStart()
        {
        }

        public void OnExecute(float dt)
        {
            if (Check())
            {
                this.Finish();
            }
        }

        public void OnFinish()
        {
        }

        public void Deinit()
        {
            if (!Deinited)
            {
                Deinited = true;
                mCondition = null;
                obj = null;
                mSimpleObjectPool.Recycle(this);
            }
        }

        public void Reset()
        {
            Paused = false;
            Status = ActionStatus.NotStart;
        }
    }

    public static class UIClickConditionExtension
    {
        public static ISequence UIClickCondition(this ISequence self, string uipath)
        {
            return self.Append(QFramework.UIClickCondition.Allocate(uipath));
        }
    }
}