using System;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Superlazy.UI
{
    public class SLUILongPressed : SLUIComponent, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler, IScrollHandler, IInitializePotentialDragHandler, IBeginDragHandler, IEndDragHandler, IDragHandler
    {
        public float firstTriggerSecond = 0.3f;
        public float triggerDuration = 0.15f;
        public string triggerBind = "LongPressDuration";
        public string triggerCommand;

        public bool triggerImmediate = false;

        public string triggerSound = "UI/SE_UI_click";

        private bool pressed = false;
        private GameObject longPressObject;
        private Slider slider;
        private float sliderValue = 0;

        private DateTime nextTriggerTime = DateTime.MinValue;
        private DateTime firstTriggerTime = DateTime.MinValue;
        private DateTime zeroValueTime = DateTime.MinValue;

        protected override void Validate()
        {
        }

        protected override void Init()
        {
        }

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

            slider = longPressObject.GetComponent<Slider>();
            longPressObject.SetActive(true);
        }

        protected override void Disable()
        {
            ReleasePressed();
            longPressObject.SetActive(false);
        }

        public void Update()
        {
            if (bindParent.Active == false) return;

            longPressObject.SetActive(slider.value > 0);

            if (pressed == false)
            {
                if (sliderValue > 0)
                {
                    sliderValue = (float)(zeroValueTime - DateTime.UtcNow).TotalSeconds / firstTriggerSecond;
                }
                slider.value = sliderValue == 0 ? 0 : sliderValue / firstTriggerSecond;
                return;
            }

            sliderValue = (firstTriggerSecond - (float)(nextTriggerTime - DateTime.UtcNow).TotalSeconds);
            slider.value = sliderValue / firstTriggerSecond;

            if ((DateTime.UtcNow - nextTriggerTime).TotalSeconds > 0)
            {
                if (triggerCommand != string.Empty)
                {
                    Trigger();
                }

                if (triggerDuration == 0)
                {
                    ReleasePressed();
                }
                else
                {
                    nextTriggerTime = DateTime.UtcNow.AddSeconds(triggerDuration);
                }
            }
        }

        public void OnPointerDown(PointerEventData eventData)
        {
            if (SLUIDragButton.globalDragging) return;
            if (bindParent.Active == false) return;

            pressed = true;
            firstTriggerTime = DateTime.UtcNow;
            if (triggerImmediate) Trigger();
            var addSecond = firstTriggerSecond;
            if (sliderValue > 0)
            {
                addSecond -= sliderValue * firstTriggerSecond;
            }
            nextTriggerTime = DateTime.UtcNow.AddSeconds(addSecond);
        }

        private void Trigger()
        {
            if (SLUIDragButton.globalDragging) return;
            if (bindParent.Active == false) return;

            SLGame.SessionGet(bindParent.BindPath)[triggerBind] = (DateTime.UtcNow - firstTriggerTime).TotalSeconds;
            SLGame.Command(triggerCommand, SLGame.SessionGet(bindParent.BindPath));

            //SLSound.PlaySound(triggerSound);
        }

        public void OnPointerUp(PointerEventData eventData)
        {
            ReleasePressed();
        }

        public void OnPointerExit(PointerEventData eventData)
        {
            ReleasePressed();
        }

        private void ReleasePressed()
        {
            pressed = false;
            zeroValueTime = DateTime.UtcNow.AddSeconds(sliderValue * firstTriggerSecond);
            SLGame.SessionGet(bindParent.BindPath)[triggerBind] = false;
        }

        public void OnScroll(PointerEventData eventData)
        {
            // block scroll
        }

        public void OnInitializePotentialDrag(PointerEventData eventData)
        {
            // block scroll
        }

        public void OnBeginDrag(PointerEventData eventData)
        {
            // block scroll
        }

        public void OnEndDrag(PointerEventData eventData)
        {
            // block scroll
        }

        public void OnDrag(PointerEventData eventData)
        {
            // block scroll
        }
    }
}