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

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

namespace Snxxz.UI
{
    public class LocalMapFindPath : MonoBehaviour, IPointerClickHandler
    {
        const float NODE_SPACEOUT = 3f;

        [SerializeField] float m_StandardSize = 50f;
        [SerializeField] BoundedDrag m_BoundDrag;
        [SerializeField] RectTransform m_LocalMapRect;
        [SerializeField] Image m_MapImage;
        [SerializeField] Transform m_ContainerPathNode;
        [SerializeField] Image m_HeroHead;
        [SerializeField] LocalMapEventPointInstroduce m_EventPointInstroduce;
        [SerializeField] Transform m_SelecteEventPointSign;

        LocalMap mapMatrix;

        Vector3 heroPrePosition = new Vector3(-999, -8888, 0);
        private List<GameObject> pathNodeBehaviours = new List<GameObject>(); //寻路点池
        List<LocalMapTag> tagBehaviours = new List<LocalMapTag>();

        MapModel model { get { return ModelCenter.Instance.GetModel<MapModel>(); } }

        int mapId = 0;
        public void Init(int _mapId)
        {
            mapId = _mapId;
            if (mapId != mapMatrix.mapId)
            {
                PathPointClear();
            }

            if (mapId == PlayerDatas.Instance.baseData.MapID)
            {
                m_HeroHead.gameObject.SetActive(true);
                var job = PlayerDatas.Instance.baseData.Job;
                m_HeroHead.SetSprite(GeneralDefine.GetJobHeadPortrait(job, 0));
            }
            else
            {
                m_HeroHead.gameObject.SetActive(false);
            }

            var dataMapId = MapUtility.GetDataMapId(mapId);
            var mapResConfig = MapResourcesConfig.GetConfig(dataMapId, 0);
            var mapWidth = mapResConfig.MapScale.x;
            var mapHeight = mapResConfig.MapScale.y;

            m_StandardSize = mapResConfig.MapShowScale;
            var uiMapWidth = mapWidth * m_StandardSize;
            var uiMapHeight = mapHeight * m_StandardSize;
            m_LocalMapRect.sizeDelta = new Vector2(uiMapWidth, uiMapHeight);
            m_MapImage.SetSprite(mapResConfig.BigMap);
            m_MapImage.SetNativeSize();

            var offsetX = Mathf.Clamp((uiMapWidth - m_BoundDrag.rectTransform.rect.width) * 0.5f, 0, float.MaxValue);
            var offsetY = Mathf.Clamp((uiMapHeight - m_BoundDrag.rectTransform.rect.height) * 0.5f, 0, float.MaxValue);

            m_BoundDrag.moveArea = new BoundedDrag.MoveArea(-offsetX, offsetX, offsetY, -offsetY);

            mapMatrix = new LocalMap(mapId, mapWidth, mapHeight, uiMapWidth, uiMapHeight);

            DrawWayPoints();
            DrawFunctionNPCs();
            DrawEventPoints();
            m_HeroHead.transform.SetAsLastSibling();
            FoucsEventPoint(model.selectedMapEventPoint);

            m_BoundDrag.onBeginDrag.RemoveAllListeners();
            m_BoundDrag.onBeginDrag.AddListener(OnBeginDrag);
            model.selectMapEventPointEvent += FoucsEventPoint;

            if (PlayerDatas.Instance.baseData.MapID == mapId)
            {
                var hero = PlayerDatas.Instance.hero;
                if (hero != null)
                {
                    if (hero.PathFindStatus == GActor.E_PathFindStatus.Moving)
                    {
                        OnHeroStartMove();
                    }
                    else
                    {
                        OnHeroStopMove();
                    }
                    hero.OnPathFinding += OnHeroStartMove;
                    hero.OnPathFindStop += OnHeroStopMove;
                }
            }
        }

        public void UnInit()
        {
            var hero = PlayerDatas.Instance.hero;
            if (hero != null)
            {
                hero.OnPathFinding -= OnHeroStartMove;
                hero.OnPathFindStop -= OnHeroStopMove;
            }

            model.selectMapEventPointEvent -= FoucsEventPoint;
            m_BoundDrag.onBeginDrag.RemoveAllListeners();

            for (int i = 0; i < tagBehaviours.Count; i++)
            {
                LocalMapTagPool.Recycle(tagBehaviours[i]);
            }

            tagBehaviours.Clear();
        }

        void HeroMoveTo(Vector3 _position)
        {
            if (mapId != PlayerDatas.Instance.baseData.MapID)
            {
                return;
            }

            if (PlayerDatas.Instance.hero == null)
            {
                return;
            }

            var position = GetGroundPosition(_position);

            PlayerDatas.Instance.hero.Behaviour.StopHandupAI();
            PlayerDatas.Instance.hero.IdleImmediate();
            PlayerDatas.Instance.hero.MoveToPosition(position);
        }

        public void OnPointerClick(PointerEventData eventData)
        {
#if UNITY_EDITOR
            if (RectTransformUtility.RectangleContainsScreenPoint(m_LocalMapRect, Input.mousePosition, CameraManager.uiCamera))
            {
                HeroMoveTo(ScreenToWorldPosition(Input.mousePosition));
            }
#else
            if (RectTransformUtility.RectangleContainsScreenPoint(m_LocalMapRect, Input.mousePosition,CameraManager.uiCamera))
            {
                HeroMoveTo( ScreenToWorldPosition(Input.touches[0].position));
            }
#endif

            if (RectTransformUtility.RectangleContainsScreenPoint((RectTransform)this.transform, Input.mousePosition, CameraManager.uiCamera)
                && !RectTransformUtility.RectangleContainsScreenPoint(m_EventPointInstroduce.containerDetails, Input.mousePosition, CameraManager.uiCamera))
            {
                model.selectedMapEventPoint = -1;
            }

        }

        private void LateUpdate()
        {
            if (mapId == PlayerDatas.Instance.baseData.MapID)
            {
                UpdateHeroPosition();
            }
        }

        Vector3 ScreenToWorldPosition(Vector3 _sp)
        {
            var originalPoint = CameraManager.uiCamera.WorldToViewportPoint(UIUtility.GetMinWorldPosition(m_LocalMapRect));
            var spToViewPoint = CameraManager.uiCamera.ScreenToViewportPoint(_sp);
            var delta = spToViewPoint - originalPoint;

            var adjustScale = (Screen.width / (float)Screen.height) / (Constants.DESIGN_RESOLUTION.x / Constants.DESIGN_RESOLUTION.y);

            var adjustX = delta.x * Constants.DESIGN_RESOLUTION.x * (adjustScale > 1f ? adjustScale : 1f) / m_LocalMapRect.rect.width;
            var adjustY = delta.y * Constants.DESIGN_RESOLUTION.y / (adjustScale < 1f ? adjustScale : 1f) / m_LocalMapRect.rect.height;

            var adjustedViewPoint = new Vector2(adjustX, adjustY);
            return new Vector3(mapMatrix.worldMapWidth * adjustedViewPoint.x, 0, mapMatrix.worldMapHeight * adjustedViewPoint.y);
        }

        private void GeneratePathNodes(Vector3 targetPos)
        {
            var pathVertexArray = GetWorldPathNodes(targetPos);
            if (pathVertexArray == null)
            {
                return;
            }

            PathPointClear();
            var nodes = NodeLerp(pathVertexArray);
            if (nodes == null)
            {
                return;
            }

            InstantiateNodeBehaviours(nodes.Count);
            for (int i = 0; i < nodes.Count; i++)
            {
                var position = mapMatrix.WorldToLocalPosition(nodes[i]);
                pathNodeBehaviours[i].transform.localPosition = position;
                pathNodeBehaviours[i].SetActive(true);
            }
        }

        private void DrawEventPoints()
        {
            var eventPoints = model.GetMapEventPoints(mapId);
            for (int i = 0; i < eventPoints.Count; i++)
            {
                var eventPoint = eventPoints[i];
                DrawEventPoint(eventPoint);
            }
        }

        private void DrawEventPoint(int _eventPoint)
        {
            var eventPointConfig = MapEventPointConfig.Get(_eventPoint);
            if (eventPointConfig.ShowInMipMap == 0)
            {
                return;
            }

            var npcType = LocalMapTag.TagType.Boss;
            var npcConfig = NPCConfig.Get(eventPointConfig.NPCID);

            if (eventPointConfig.IsShowInfo == 1)
            {
                if (npcConfig.NPCType == (int)E_NpcType.Func)
                {
                    npcType = LocalMapTag.TagType.Function;
                }
                else if (npcConfig.NPCType == (int)E_NpcType.Fight)
                {
                    switch ((E_MonsterType)npcConfig.IsBoss)
                    {
                        case E_MonsterType.Normal:
                            npcType = LocalMapTag.TagType.Monster;
                            break;
                        default:
                            npcType = LocalMapTag.TagType.Elite;
                            break;
                    }
                }
            }
            else
            {
                npcType = LocalMapTag.TagType.Boss;
            }

            var monsterRefreshConfig = MonsterRefreshPointConfig.Get(npcConfig.NPCID);
            var npcPos = new Vector3(monsterRefreshConfig.Position.x * 0.5f, 0, monsterRefreshConfig.Position.y * 0.5f);

            var behaviour = LocalMapTagPool.Require(npcType);
            tagBehaviours.Add(behaviour);
            if (npcType == LocalMapTag.TagType.Boss)
            {
                behaviour.Display(eventPointConfig.NPCID, (TextColType)eventPointConfig.Colour, npcPos);
            }
            else
            {
                behaviour.Display(npcConfig.NPCID, (TextColType)eventPointConfig.Colour);
            }

            var pathPointPos = mapMatrix.WorldToLocalPosition(npcPos);
            behaviour.transform.SetParentEx(m_LocalMapRect, pathPointPos, Quaternion.identity, Vector3.one);
            behaviour.gameObject.SetActive(true);
        }


        private void DrawWayPoints()
        {
            var waypoints = maptransportConfig.GetValues();
            foreach (var waypoint in waypoints)
            {
                if (waypoint.OriginalMapID == this.mapId)
                {
                    DrawWayPoint(waypoint.TransportID);
                }
            }
        }

        private void DrawWayPoint(int _wayPoint)
        {
            var config = maptransportConfig.Get(_wayPoint.ToString());
            var behaviour = LocalMapTagPool.Require(LocalMapTag.TagType.WayPoint);

            tagBehaviours.Add(behaviour);
            var position = new Vector3(config.OriginalPosX * 0.5f, 0, config.OriginalPosY * 0.5f);

            var pathPointPos = mapMatrix.WorldToLocalPosition(position);
            behaviour.transform.SetParentEx(m_LocalMapRect, pathPointPos, Quaternion.identity, Vector3.one);
            behaviour.gameObject.SetActive(true);
        }

        private void DrawFunctionNPCs()
        {
            var npcRefreshIds = model.GetMapNPCRefreshIds(mapId);
            if (npcRefreshIds != null)
            {
                foreach (var item in npcRefreshIds)
                {
                    var config = mapnpcConfig.Get(item);
                    var npcConfig = NPCConfig.Get(config.NPCID);
                    DrawFunctionNPC(item);
                }
            }
        }

        private void DrawFunctionNPC(string _refreshId)
        {
            var mapNpcConfig = mapnpcConfig.Get(_refreshId);

            var behaviour = LocalMapTagPool.Require(LocalMapTag.TagType.Function);

            tagBehaviours.Add(behaviour);
            var originalPosition = GAStaticDefine.GetClientPostionFromHex(mapNpcConfig.HexPosNPCRefreshAreaChaseArea);
            var position = new Vector3(originalPosition.x, 0, originalPosition.y);

            var pathPointPos = mapMatrix.WorldToLocalPosition(position);
            behaviour.transform.SetParentEx(m_LocalMapRect, pathPointPos, Quaternion.identity, Vector3.one);
            behaviour.gameObject.SetActive(true);
            behaviour.Display(mapNpcConfig.NPCID, TextColType.White);
        }

        private void UpdateHeroPosition()
        {
            if (mapId == PlayerDatas.Instance.baseData.MapID)
            {
                var heroPos = mapMatrix.WorldToLocalPosition(PlayerDatas.Instance.hero.Pos);
                if (Vector3.Distance(heroPrePosition, heroPos) > 0.01f)
                {
                    m_HeroHead.transform.localPosition = heroPos;
                }
            }
        }

        private void PathPointClear()
        {
            for (int i = pathNodeBehaviours.Count - 1; i >= 0; i--)
            {
                pathNodeBehaviours[i].SetActive(false);
            }
        }

        private Vector3[] GetWorldPathNodes(Vector3 targetPos)
        {
            return PlayerDatas.Instance.hero.GetCorners();
        }

        List<Vector3> NodeLerp(Vector3[] _originalNodes)
        {
            if (_originalNodes == null || _originalNodes.Length < 2)
            {
                return null;
            }

            var nodes = new List<Vector3>();
            nodes.Add(_originalNodes[0]);

            var acclength = 0f;

            for (int i = 0; i < _originalNodes.Length - 1; i++)
            {
                var node1 = _originalNodes[i];
                var node2 = _originalNodes[i + 1];
                var direction = Vector3.Normalize(node2 - node1);
                var distance = Vector3.Distance(node1, node2);

                while (acclength < distance)
                {
                    nodes.Add(node1 + direction * acclength);
                    acclength += NODE_SPACEOUT;
                }

                acclength = acclength - distance;
            }

            if (Vector3.Distance(nodes[nodes.Count - 1], _originalNodes[_originalNodes.Length - 1]) > NODE_SPACEOUT * 0.5f)
            {
                nodes.Add(_originalNodes[_originalNodes.Length - 1]);
            }

            return nodes;
        }

        void InstantiateNodeBehaviours(int _count)
        {
            var now = pathNodeBehaviours.Count;
            var dif = _count - now;
            if (dif > 0)
            {
                var prefab = UILoader.LoadPrefab("LocalMap_PathNode");
                for (int i = 0; i < dif; i++)
                {
                    var instance = Instantiate<GameObject>(prefab);
                    pathNodeBehaviours.Add(instance);
                    instance.transform.SetParentEx(m_ContainerPathNode, Vector3.zero, Quaternion.identity, Vector3.one);
                }
            }
        }

        private void FoucsEventPoint(int _eventPoint)
        {
            if (model.selectedMapEventPoint != -1)
            {
                var config = MapEventPointConfig.Get(_eventPoint);
                var monsterRefreshConfig = MonsterRefreshPointConfig.Get(config.NPCID);
                var position = new Vector3(monsterRefreshConfig.Position.x * 0.5f, 0, monsterRefreshConfig.Position.y * 0.5f);

                var localPosition = mapMatrix.WorldToLocalPosition(position);
                m_BoundDrag.destPosition = -1 * localPosition;

                if (localPosition.y >= 0f)
                {
                    m_SelecteEventPointSign.localPosition = localPosition.SetY(localPosition.y - 15);
                }
                else
                {
                    m_SelecteEventPointSign.localPosition = localPosition.SetY(localPosition.y + 15);
                }

                m_EventPointInstroduce.gameObject.SetActive(true);
                m_EventPointInstroduce.Display(model.selectedMapEventPoint, m_SelecteEventPointSign);
            }
            else
            {
                m_EventPointInstroduce.gameObject.SetActive(false);
            }
        }

        private Vector3 GetGroundPosition(Vector3 _xzPosition)
        {
            RaycastHit hit;
            var ray = new Ray(_xzPosition.SetY(50f), Vector3.down);

            if (Physics.Raycast(ray, out hit, 100f, LayerUtility.WalkbleMask))
            {
                return hit.point;
            }
            else
            {
                return _xzPosition;
            }
        }

        private void OnHeroStartMove()
        {
            if (PlayerDatas.Instance.hero == null)
            {
                return;
            }
            GeneratePathNodes(PlayerDatas.Instance.hero.DestPos);
        }

        private void OnHeroStopMove()
        {
            if (PlayerDatas.Instance.hero == null)
            {
                return;
            }

            PathPointClear();
        }

        private void OnBeginDrag()
        {
            model.selectedMapEventPoint = -1;
        }

        public struct LocalMap
        {
            public int mapId;
            public float worldMapWidth;
            public float worldMapHeight;
            public float localMapWidth;
            public float localMapHeight;

            public LocalMap(int mId, float mWidth, float mHeigth, float mSpriteWidth, float mSpriteHeight)
            {
                mapId = mId;
                worldMapWidth = mWidth;
                worldMapHeight = mHeigth;
                localMapWidth = mSpriteWidth;
                localMapHeight = mSpriteHeight;
            }

            public Vector3 WorldToLocalPosition(Vector3 _worldPosition)
            {
                var x = ((_worldPosition.x - worldMapWidth * 0.5f) / worldMapWidth) * localMapWidth;
                var y = ((_worldPosition.z - worldMapHeight * 0.5f) / worldMapHeight) * localMapHeight;
                return new Vector3(x, y, 0);
            }

        }
    }

}