using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using AX.MessageSystem;
using System;
using AX.InputSystem;
using AX.NetworkSystem;

public class ObjDrag : MonoBehaviour {

    private Vector3 prevPos = Vector3.zero;//进入拖动过程前（开始拖动）时鼠标在屏幕坐标系中的位置
    private Vector3 mousePostion = Vector3.zero;
    private bool dragStart;
    private GameObject hitObj;

    public Vector3 prevTranformPos = Vector3.zero;//进入拖动记录的位置，拖动到不能放下的地方，会弹回到此位置

    // Use this for initialization
    void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
        if (dragStart)
            ObjTranslate();
    }

    void OnEnable()
    {
        MessageDispatcher.AddListener("OBJ_DRAG_ENTER_COMMAND", ObjDragEnterExecute);
        MessageDispatcher.AddListener("OBJ_DRAGING_COMMAND", ObjDragingExecute);
        MessageDispatcher.AddListener("OBJ_DRAG_EXIT_COMMAND", ObjDragExitExecute);
    }

    void OnDisable()
    {
        MessageDispatcher.RemoveListener("OBJ_DRAG_ENTER_COMMAND", ObjDragEnterExecute);
        MessageDispatcher.RemoveListener("OBJ_DRAGING_COMMAND", ObjDragingExecute);
        MessageDispatcher.RemoveListener("OBJ_DRAG_EXIT_COMMAND", ObjDragExitExecute);
    }

    void OnDestroy()
    {
        MessageDispatcher.RemoveListener("OBJ_DRAG_ENTER_COMMAND", ObjDragEnterExecute);
        MessageDispatcher.RemoveListener("OBJ_DRAGING_COMMAND", ObjDragingExecute);
        MessageDispatcher.RemoveListener("OBJ_DRAG_EXIT_COMMAND", ObjDragExitExecute);
    }

    private void ObjDragEnterExecute(IMessage obj)
    {
        var data = (ObjDragCmdArgs)obj.Data;

        mousePostion = data.mousePosition;
        dragStart = data.dragStart;

        var screenSpace = Camera.main.WorldToScreenPoint(transform.position);
        prevPos = new Vector3(mousePostion.x, mousePostion.y, screenSpace.z);

        var gameObjID = (long)obj.Sender;
        hitObj = EntitiesManager.Instance.GetEntityByID(gameObjID);

        //特殊处理集结区，安全区的移动：进入时记录下拖动前的位置
        if (gameObjID == transform.GetComponent<BaseGameObjInfo>().gameObjID)
        {
            if (GetComponent<BaseGameObjInfo>().gameObjType == CloneObjType.stagingArea
            || GetComponent<BaseGameObjInfo>().gameObjType == CloneObjType.SafeArea)
            {
                prevTranformPos = hitObj.transform.position;
            }
        }
    }

    private void ObjDragingExecute(IMessage obj)
    {
        var data = (ObjDragCmdArgs)obj.Data;

        mousePostion = data.mousePosition;

        dragStart = data.dragStart;

        var gameObjID = (long)obj.Sender;
        hitObj = EntitiesManager.Instance.GetEntityByID(gameObjID);

        //拖拽过程中，集结区，安全区提示是否能放下（当前位置不能寻路则不能放下）
        if (gameObjID == transform.GetComponent<BaseGameObjInfo>().gameObjID)
        {
            if (GetComponent<BaseGameObjInfo>().gameObjType == CloneObjType.stagingArea
                || GetComponent<BaseGameObjInfo>().gameObjType == CloneObjType.SafeArea)
            {
                if (transform.parent.GetComponent<CloneStayingAreaTool>())
                {
                    if (!transform.parent.GetComponent<CloneStayingAreaTool>().CheckCloneAble(transform.position))
                    {
                        transform.GetComponent<Renderer>().material.color = Color.red;
                    }
                    else
                    {
                        transform.GetComponent<Renderer>().material.color = Color.green;
                    }
                }

                if (transform.parent.GetComponent<CloneSafeAreaTool>())
                {
                    if (!transform.parent.GetComponent<CloneSafeAreaTool>().CheckCloneAble(transform.position))
                    {
                        transform.GetComponent<Renderer>().material.color = Color.red;
                    }
                    else
                    {
                        transform.GetComponent<Renderer>().material.color = Color.green;
                    }
                }
            }
        }
            
    }

    private void ObjDragExitExecute(IMessage obj)
    {
        var data = (ObjDragCmdArgs)obj.Data;

        prevPos = data.mousePosition;

        dragStart = data.dragStart;

        var gameObjID = (long)obj.Sender;
        hitObj = EntitiesManager.Instance.GetEntityByID(gameObjID);

        //拖动结束时，集结区，安全区判断能否停放到当前结束拖动的位置
        if (gameObjID == transform.GetComponent<BaseGameObjInfo>().gameObjID)
        {
            if (GetComponent<BaseGameObjInfo>().gameObjType == CloneObjType.stagingArea
                || GetComponent<BaseGameObjInfo>().gameObjType == CloneObjType.SafeArea)
            {
                if (transform.parent.GetComponent<CloneStayingAreaTool>())
                {
                    if (!transform.parent.GetComponent<CloneStayingAreaTool>().CheckCloneAble(transform.position))
                    {
                        transform.position = prevTranformPos;
                        transform.GetComponent<Renderer>().material.color = Color.white;
                    }
                    else
                    {
                        transform.GetComponent<Renderer>().material.color = Color.white;
                    }
                }

                if (transform.parent.GetComponent<CloneSafeAreaTool>())
                {
                    if (!transform.parent.GetComponent<CloneSafeAreaTool>().CheckCloneAble(transform.position))
                    {
                        transform.position = prevTranformPos;
                        transform.GetComponent<Renderer>().material.color = Color.white;

                        var arg = new ObjDragSyncData();
                        arg.SendUserID = CurrentUserInfo.mySelf.Id;
                        arg.position = prevTranformPos;
                        arg.gameObjID = GetComponent<BaseGameObjInfo>().gameObjID;
                        NetworkManager.Default.SendAsync("OBJ_DRAG_SYNC", arg);
                    }
                    else
                    {
                        transform.GetComponent<Renderer>().material.color = Color.white;
                    }
                }
            }
        }
            
    }

    /// <summary>
    /// 拖拽克隆对象平面移动
    /// </summary>
    private void ObjTranslate()
    {
        if (gameObject == hitObj)
        {
            if (gameObject.GetComponent<FireSpreadCtrl>())
            {
                if (gameObject.GetComponent<FireSpreadCtrl>().fireAttribute.spreadWay != SpreadWay.None)
                {
                    LoadPromptWin.Instance.LoadTextPromptWindow("开始蔓延的火不能拖动！", 1f);
                    return;
                }
            }
            if (mousePostion.x > Screen.width || mousePostion.y > Screen.height)
            {
                return;
            }
            var screenSpace = Camera.main.WorldToScreenPoint(transform.position);

            var currPos = new Vector3(mousePostion.x, mousePostion.y, screenSpace.z);

            var prev = Camera.main.ScreenToWorldPoint(prevPos);
            var curr = Camera.main.ScreenToWorldPoint(currPos);

            var offset = curr - prev;

            offset.y = 0;

            transform.position += offset;

            //拖拽同步
            if (GameSettings.othersSettings.mode!=Mode.DisasterManagement)
            {
                var arg = new ObjDragSyncData();
                arg.SendUserID = CurrentUserInfo.mySelf.Id;
                arg.position = transform.position;
                arg.gameObjID = GetComponent<BaseGameObjInfo>().gameObjID;
                NetworkManager.Default.SendAsync("OBJ_DRAG_SYNC", arg);
            }
            //如果是被困人员，更改被困人员出生位置
            if (GetComponent<TrappedMoveFree>())
            {
                GetComponent<TrappedMoveFree>().originalpoint = transform.position;
            }

            prevPos = currPos;
        }
    }
}