using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;
using LzFramework.FSM.Msg;
using LzFramework;

namespace DisComputer
{
    /*
     * 模型控制 
     * @author lz
     */
    public class ModelControl : Singleton<ModelControl>
    {

        public LayerMask clickableLayer;
        //模糊后背景
        public SpriteRenderer vagueMask_spr;
        // Start is called before the first frame update
        void Start()
        {
            curRotPlatform = destopPlatform;
            InitMsg();
        }

        // Update is called once per frame
        void Update()
        {

            if (MouseControl.Instance.isFocuseState)
                return;
            MouseThroughCamera();

            RotationTarget();

        }

        /// <summary>
        /// 模型角度复原
        /// </summary>
        public void RewindTargetRoatation()
        {
            curRotPlatform.transform.DORotate(new Vector3(0, 0, 0), 0.5f);
        }


        /// <summary>
        /// 注册消息
        /// </summary>
        void InitMsg()
        {
            MessageDispatcher.AddListener(MsgName.ModelControlShowCenter, OnRecShowPlatform);
            MessageDispatcher.AddListener(MsgName.ModelControlShowDesktop, OnRecDesktopPlatform);
        }

        /// <summary>
        /// 展示中心平台
        /// </summary>
        /// <param name="message"></param>
        void OnRecShowPlatform(IMessage message)
        {
            StartCoroutine(MoveToCenter(dragTarget.transform));
        }

        /// <summary>
        /// 展示桌面平台
        /// </summary>
        /// <param name="message"></param>
        void OnRecDesktopPlatform(IMessage message)
        {
            StartCoroutine(MoveToDesktop(dragTarget.transform));
        }



        //拖拽物体
        public  GameObject dragTarget;
        //是否点击到物体
        private bool isClickedObj;

        private Vector3 screenSpace;

        private Vector3 offset;

        /// <summary>
        /// 鼠标控制
        /// </summary>
        void MouseThroughCamera()
        {


            if (Input.GetMouseButtonDown(0))
            {
                if (ChectClickTarget())
                {

                    screenSpace = Camera.main.WorldToScreenPoint(dragTarget.transform.position);

                    offset = dragTarget.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z));

                }
            }

            if (isClickedObj)
            {
                
                Vector3 curScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);
                Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenSpace) + offset;
                dragTarget.transform.position = curPosition;

            }

            if (Input.GetMouseButtonUp(0))
            {
                isClickedObj = false;
            }

        }

        /// <summary>
        /// 检测是否点击目标物体
        /// </summary>
        /// <returns></returns>
        bool ChectClickTarget()
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit, 50, clickableLayer.value))
            {

                dragTarget = hit.collider.gameObject;
                isClickedObj = true;
                return true;

            }
            return false;

        }

        //旋转速度
        public float rotationSpeed;
        //桌面旋转平台
        public Transform destopPlatform;
        //拆装旋转平台
        public Transform showPlatform;
        //当前旋转平台
        private Transform curRotPlatform;
        private bool isFree = false;
        /// <summary>
        /// 旋转目标
        /// </summary>
        void RotationTarget()
        {
            if (curRotPlatform == null)
                return;

            Vector3 fwd = Camera.main.transform.forward;
            fwd.Normalize();
            if (Input.GetMouseButton(1))
            {
                Vector3 vaxis = Vector3.Cross(fwd, Vector3.right);
                curRotPlatform.Rotate(Vector3.up, -Input.GetAxis("Mouse X")* rotationSpeed, Space.World);
                if (isFree)
                {
                    Vector3 haxis = Vector3.Cross(fwd, Vector3.up);
                    curRotPlatform.Rotate(haxis, -Input.GetAxis("Mouse Y") * rotationSpeed, Space.World);
                }          
            }      
        }

        /// <summary>
        /// 移动到中间位置
        /// </summary>
        /// <param name="target"></param>
        /// <returns></returns>
        IEnumerator MoveToCenter(Transform target)
        {
            yield return new WaitForEndOfFrame();
            Tween tw_move = target.DOMove(showPlatform.position, 0.5f);
            tw_move.SetEase(Ease.OutQuart);
            vagueMask_spr.DOFade(1.0f, 0.5f);
            tw_move.OnComplete(()=> {
                isFree = true;
                target.SetParent(showPlatform,true);
                curRotPlatform = showPlatform;
                destopPlatform.localEulerAngles = Vector3.zero;

            });
            target.DORotate(new Vector3(0, 300, 0), 0.5f);
        }

        /// <summary>
        /// 移动到桌面位置
        /// </summary>
        /// <param name="target"></param>
        /// <returns></returns>
        IEnumerator MoveToDesktop(Transform target)
        {
            yield return new WaitForEndOfFrame();
            
            Tween tw_move = target.DOMove(destopPlatform.position, 0.5f);
            vagueMask_spr.DOFade(0.0f, 0.5f);
            tw_move.SetEase(Ease.InSine);
            tw_move.OnComplete(() => {
                isFree = false;
                target.SetParent(destopPlatform, true);
                curRotPlatform = destopPlatform;
                showPlatform.localEulerAngles = Vector3.zero;

            });
            target.DORotate(new Vector3(0, -40, 0), 0.5f);

        }




    }
}