using UnityEngine;
using UnityEngine.EventSystems;

namespace Superlazy.UI
{
    public class SLUIHover : SLUIComponent, IPointerEnterHandler, IPointerExitHandler, IPointerMoveHandler
    {
        public string enterCommand;
        public string exitCommand;
        public bool useLongHover;
        public string longHoverCommand;
        public SLValueComparison comparison;
        public string hoverSound;

        private Canvas canvas;
        private bool hovered = false;
        private GameObject hoverRing;

        protected override void Validate()
        {
            canvas = GetComponentInParent<Canvas>();
        }

        protected override void Init()
        {
        }

        protected override void Enable()
        {
            if (useLongHover)
            {
                if (hoverRing == null)
                {
                    hoverRing = SLResources.CreatePrefabInstance("UIComponents/HoverRing", gameObject.transform);
                }

                hoverRing.SetActive(false);
            }
            if (comparison.useCheckValue) comparison.OnEnable(bindParent.BindPath, OnChange);
        }

        protected override void Disable()
        {
            if (comparison.useCheckValue) comparison.OnDisable();
            if (useLongHover)
            {
                if (hoverRing)
                {
                    hoverRing.SetActive(false);
                }
            }

            if (hovered)
            {
                EndHover();
                hovered = false;
            }
        }

        public void Update()
        {
            if (comparison.useCheckValue && comparison.Result == false) return;

            if (useLongHover && hovered)
            {
                if (SLGame.Session["Hover"]["HoverTime"])
                {
                    if (SLGame.Session["Hover"]["HoverDelay"])
                    {
                        SLGame.Session["Hover"]["HoverDelay"] -= Time.deltaTime;
                        if (SLGame.Session["Hover"]["HoverDelay"] <= 0)
                        {
                            SLGame.Session["Hover"]["HoverDelay"] = false;
                        }
                        return;
                    }
                    SLGame.Session["Hover"]["HoverTime"] += Time.deltaTime;
                    if (SLGame.Session["Hover"]["HoverTime"] > SLGame.Session["Hover"]["HoverTimeMax"])
                    {
                        SLGame.Session["Hover"]["HoverTime"] = false;
                        SLGame.Session["Hover"]["HoverTimeMax"] = false;
                        hoverRing.gameObject.SetActive(false);

                        LongHover();
                    }
                }
            }
        }

        private void OnChange()
        {
            if (bindParent.Active == false) return;

            if (hovered && comparison.useCheckValue && comparison.Result == false)
            {
                EndHover();
            }
        }

        public void OnPointerEnter(PointerEventData eventData)
        {
            hovered = true;

            if (useLongHover)
            {
                hoverRing.gameObject.SetActive(true);
                SLGame.Session["Hover"]["HoverTimeMax"] = SLSystem.Data["Default"]["LongHoverDuration"];
                SLGame.Session["Hover"]["HoverTime"] = 0;
            }

            BeginHover();
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            hovered = false;

            if (useLongHover)
            {
                hoverRing.gameObject.SetActive(false);
                SLGame.Session["Hover"]["HoverTimeMax"] = false;
                SLGame.Session["Hover"]["HoverTime"] = false;
            }

            EndHover();
        }

        public void OnPointerMove(PointerEventData eventData)
        {
            if (useLongHover && SLGame.Session["Hover"]["HoverTime"])
            {
                RectTransformUtility.ScreenPointToLocalPointInRectangle(gameObject.GetComponent<RectTransform>(), eventData.position, canvas.worldCamera, out var localPoint);
                hoverRing.GetComponent<RectTransform>().localPosition = localPoint;
                SLGame.Session["Hover"]["HoverTime"] = 0;
                SLGame.Session["Hover"]["HoverDelay"] = SLSystem.Data["Default"]["LongHoverDelay"];
            }
        }

        private void BeginHover()
        {
            if (comparison.useCheckValue && comparison.Result == false) return;
            if (enterCommand == string.Empty) return;

            if (string.IsNullOrEmpty(hoverSound) == false)
            {
                SLSound.PlaySound(hoverSound, "UI", false, false, true, 0.5f);
            }

            SLGame.Command(enterCommand, SLGame.SessionGet(bindParent.BindPath));
        }

        private void EndHover()
        {
            if (comparison.useCheckValue && comparison.Result == false) return;
            if (exitCommand == string.Empty) return;

            SLGame.Command(exitCommand, SLGame.SessionGet(bindParent.BindPath));
        }

        private void LongHover()
        {
            if (comparison.useCheckValue && comparison.Result == false) return;
            if (longHoverCommand == string.Empty) return;

            if (string.IsNullOrEmpty(hoverSound) == false)
            {
                SLSound.PlaySound(hoverSound, "UI", false, false, true, 0.5f);
            }

            SLGame.Command(longHoverCommand, SLGame.SessionGet(bindParent.BindPath));
        }
    }
}