using Assets.Scenes.Ride.Scripts.Model;
using Assets.Scripts;
using System;
using System.Linq;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Assets.Scenes.Ride.Scripts
{
    public class NearByFactory : MonoBehaviour
    {
        PlayerController playerController;
        private GameObject nearByItem;
        private GameObject nearByMajorItem;
        private GameObject scroll;
        GameObject body;

        private int bufferSize = 0;
        private int pageIndex = 1;
        private int pageSize =7;

        private int preNum = 0;//前面的数量
        private int offset = 8;//显示区域的数量

        CyclingController cyclingController;
        private void Awake()
        {
            cyclingController = FindObjectOfType<CyclingController>();
            playerController = FindObjectOfType<PlayerController>();
            nearByItem = Resources.Load<GameObject>("UI/Prefab/Ride/NearbyItem");
            nearByMajorItem = Resources.Load<GameObject>("UI/Prefab/Ride/NearbyMajorItem");
            scroll = transform.parent.parent.gameObject;
            if (scroll != null)
            {
                UIManager.AddEvent(scroll, UnityEngine.EventSystems.EventTriggerType.EndDrag, OnEndDrag);
            }
        }
        bool startMouse = false;
        float t =1f;
        private void Update()
        {
            if (Input.GetAxis("Mouse ScrollWheel") != 0)
            {
                if (scroll.GetComponent<ScrollRect>().verticalNormalizedPosition <= 0 ||
                    scroll.GetComponent<ScrollRect>().verticalNormalizedPosition >= (pageIndex == 0 ? 1.2 : 1))
                {
                    startMouse = true;
                }
            }
            else
            {
                if (startMouse)
                {
                    startMouse = false;
                    OnEndDrag(null);
                }
            }

            t -= Time.deltaTime;
            while (t < 0)
            {
                Utils.DestroyChildren(transform);
                var nearList = MapUDPService.GetNearRiderData(pageIndex, pageSize, new double[] { playerController.Currentlatlong.x, playerController.Currentlatlong.y });
                totalPages = MapUDPService.GetNearRiderCount();
                for (int i = 0; i < nearList.Count(); i++)
                {
                    Create(nearList[i]);
                }
                t = 1;
            }
        }
        private int totalPages = 0;
        private void OnEndDrag(BaseEventData arg0)
        {
            var scrollrect = scroll.GetComponent<ScrollRect>();
            if (scrollrect.verticalNormalizedPosition <= 0)
            {
                var p = pageIndex + 1;
                if (p * pageSize <= totalPages)
                {
                    pageIndex++;
                }
                //RefreshList();

            }
            if (scrollrect.verticalNormalizedPosition >= (pageIndex == 0 ? 1.2 : 1))
            {
                var p = pageIndex - 1;
                if (p > 0)
                {
                    pageIndex--;
                }
                //if (pageIndex > 0)
                //    pageIndex--;
                //RefreshList();
            }
        }

        private void RefreshList()
        {
            var nearList = MapUDPService.GetNearRiderData(pageIndex, pageSize, new double[] { playerController.Currentlatlong.x, playerController.Currentlatlong.y });
     
            for (int i = 0; i < nearList.Count(); i++)
            {
                if (bufferSize < pageSize)
                {
                    Create(nearList[i]);
                }
                else
                {
                    UpdateItem(nearList[i],i);
                }
            }
        }
        private void Create(NearRiderModel item)
        {
            //创建
            GameObject prefabItem = item.IsSelf ? nearByMajorItem : nearByItem;
            GameObject newObj = (GameObject)Instantiate(prefabItem, transform);
            var nearByItemscript = newObj.GetComponent<NearByItemScript>();
            nearByItemscript.setUserId(item.Id);
            nearByItemscript.setName(item.Name);
            nearByItemscript.setRatio(item.KGWeight+"W/KG");
            nearByItemscript.setSpeed(item.Speed.ToString() + "KM/H");
            nearByItemscript.setHead(item.Headimage);
            nearByItemscript.setCountry(cyclingController.GetCountryImageByName(item.Country));
            nearByItemscript.setDistance(item.Near.ToString() + "KM");
            bufferSize++;
        }

        private void UpdateItem(NearRiderModel item,int index)
        {
            for (int i = 0; i < transform.childCount; i++)
            {
                var child = transform.GetChild(i);
                if (child != null)
                {
                    NearByItemScript nearByItemscript = child.GetComponent<NearByItemScript>();
                    if (nearByItemscript.UserId == item.Id)
                    {
                        nearByItemscript.setName(item.Name);
                        nearByItemscript.setRatio(item.KGWeight + "W/KG");
                        nearByItemscript.setSpeed(item.Speed.ToString() + "KM/H");
                        //nearByItemscript.setHead(item.Headimage);
                        //nearByItemscript.setCountry(item.CountryImg);
                        nearByItemscript.setDistance(item.Near.ToString() + "KM");
                        if (index != i)//重排序
                        {
                            child.SetSiblingIndex(index);
                        }
                    }
                }
            }
        }
    }
}