using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace vnxbqy.UI
{
    public class ExpertSkillCyclicScroll : MonoBehaviour
    {
        [SerializeField] ScrollRect m_Scroller;
        [SerializeField] RectTransform m_Content;
        [SerializeField] List<ExpertSkillConditionCell> m_ConditionCells;
        [SerializeField] float m_Elasticity = 0.1f;

        float speed = 10f;
        bool autoLerp = false;

        float targetNormalizedY = 0f;
        TreasureSkillModel model { get { return ModelCenter.Instance.GetModel<TreasureSkillModel>(); } }

        int tempHeight = 0;

        public void Display(int skillId,int maxLevel)
        {
            CreateElements(maxLevel);
            for (int i = 0; i < m_ConditionCells.Count; i++)
            {
                m_ConditionCells[i].SetActive(i < maxLevel);
                if (i < maxLevel)
                {
                    m_ConditionCells[i].Display(skillId, i + 1);
                }
            }
            tempHeight = (int)m_Content.rect.height;
            m_Scroller.verticalNormalizedPosition = 1f;
        }

        public void MoveToCenter(int index)
        {
            var height = 0f;
            for (int i = 0; i < m_ConditionCells.Count; i++)
            {
                if (i < index)
                {
                    var rect = m_ConditionCells[i].transform as RectTransform;
                    height += rect.rect.height;
                }
            }


            var viewHeight = (m_Scroller.transform as RectTransform).rect.height;
            var contentHeight = m_Content.rect.height;

            height -= viewHeight / 3;


            targetNormalizedY = Mathf.Clamp01(1 - height / (contentHeight - viewHeight));

            autoLerp = true;
        }

        private void LateUpdate()
        {
            if (tempHeight != (int)m_Content.rect.height)
            {
                //创建后重刷新位置
                m_Scroller.verticalNormalizedPosition = 1f;
                tempHeight = (int)m_Content.rect.height;
            }
            if (autoLerp)
            {
                if (Mathf.Abs(m_Scroller.verticalNormalizedPosition - targetNormalizedY) > 0.01f)
                {
                    m_Scroller.verticalNormalizedPosition = Mathf.SmoothDamp(m_Scroller.verticalNormalizedPosition, targetNormalizedY, ref speed, m_Elasticity);
                }
                else
                {
                    autoLerp = false;
                }
            }
            CloseExpertSkillSelectWin();
        }

        private void CloseExpertSkillSelectWin()
        {
            if (model.CloseExpertSkillSelectWinTime != 0 && DateTime.Now.Ticks - model.CloseExpertSkillSelectWinTime > 15000000)
            {
                WindowCenter.Instance.Close<ExpertSkillSelectWin>();
                model.CloseExpertSkillSelectWinTime = 0;
            };
        }

        public void Dispose()
        {
            for (int i = 0; i < m_ConditionCells.Count; i++)
            {
                m_ConditionCells[i].Dispose();
            }
        }

        void CreateElements(int count)
        {
            if (m_ConditionCells.Count < count)
            {
                var delta = count - m_ConditionCells.Count;
                for (int i = 0; i < delta; i++)
                {
                    var go = GameObject.Instantiate(m_ConditionCells[0].gameObject);
                    var instance = go.GetComponent<ExpertSkillConditionCell>();
                    go.transform.SetParentEx(m_Content, Vector3.zero, Quaternion.identity, Vector3.one);
                    m_ConditionCells.Add(instance);
                }
            }
        }
    }
}