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

[Serializable]
public class CameraData
{
    public Vector3 targetPos;
    public float x;
    public float y;
    public float distance;

}
[Serializable]
public class CameraReplayData
{
    public Vector3 myPostion;
    public Quaternion myRotation;
    public float myTime;
}
public class CameraManager : MonoBehaviour
{
    public Transform target;
    public float xSpeed = 200, ySpeed = 200, mSpeed = 50;
    public float yMinLimit = 3, yMaxLimit = 90;
    public float distance = 15, minDistance = 5, maxDistance = 40;
    public float Top = 0.0f;
    public float x = 0.0f;
    public float y = 0.0f;
    public bool needDamping = true;
    public float damping = 5.0f;

    private Quaternion rotation = new Quaternion();
    private Vector3 position = new Vector3();

    private float mouseScroll = 0.0f;

    private float mouse_X = 0.0f;
    private float mouse_Y = 0.0f;
    private bool rotateStart;

    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;

    public float VerticalSpeed = 5.0f;
    public float yMax = 5.0f;
    private float keyX;
    private bool targetMoveing;
    public float initialTargetPosY;

    private float distanceResult;
    private float x_Result;
    private float y_Result;
    private bool flag;
    private float recordtimmer;
    private float recordtime;
    private float lastrecordtime;
    private CameraReplayData data;
    private CameraReplayData rePlaydata;
    private bool isReplay = false;
    private bool isReplayData = false;
    private float rePlaytimmer;
    private ReplayManager replayManager;
    private Vector3 startPos;
    private Quaternion startRot;
    private Quaternion stopQuaternion;
    private Vector3 stopTransform;
    private bool canUpDate;

    // Use this for initialization
    void Awake()
    {
        target = GameObject.Find("Target").transform;

        Vector3 angles = transform.eulerAngles;
        x = angles.y;
        y = angles.x;

        initialTargetPosY = target.position.y;
        MessageDispatcher.AddListener("ReplayFrame", ReplayFrameCamera);
        MessageDispatcher.AddListener("ReplayEvent", ReplayCamera);
        data = new CameraReplayData();
        replayManager = GameObject.Find("Canvas").transform.Find("TopUI/TimeLinePanel").GetComponent<ReplayManager>();
        MessageDispatcher.AddListener("ReplayStatusChanged", RePlayStusChanged);
        CameraData cdata = new CameraData//初始化视角
        {
            //x = 180f,
            //y = 30f,
            //distance = 95f,
            x = -45f,
            y = 18f,
            distance = 90f,
            // targetPos = new Vector3(-180.7f, 1.02f, -40f)
            targetPos = new Vector3(118f, 10f, -64f)
        };
        CameraSetting(cdata);
    }



    private void ReplayCamera(IMessage obj)
    {
        var eventData = (EventData)obj.Data;
        if (eventData.eventType == RecordEventType.Camera)
        {
            rePlaydata = JsonUtility.FromJson<CameraReplayData>(eventData.json);
            isReplay = true;
            isReplayData = true;
            //记录回放开始点状态
            rePlaytimmer = replayManager.replayTime;
            startPos = transform.position;
            startRot = transform.rotation;
        }
    }

    private void OnDestroy()
    {
        MessageDispatcher.RemoveListener("ReplayFrame", ReplayFrameCamera);
        MessageDispatcher.RemoveListener("ReplayEvent", ReplayCamera);
        MessageDispatcher.RemoveListener("ReplayStatusChanged", RePlayStusChanged);
    }

    private void ReplayFrameCamera(IMessage obj)
    {
        var objectData = (ObjectData)obj.Data;
        if (objectData.cloneObjType == CloneObjType.Camera)
        {
            CameraData data = JsonUtility.FromJson<CameraData>(objectData.json);
            CameraSetting(data);
        }
    }
    public CameraData GetNowCameraData()
    {
        CameraData data = new CameraData()
        {
            x = this.x,
            y = this.y,
            distance = this.distance,
            targetPos = target.position
        };
        return data;
    }
    public void CameraSetting(CameraData data)
    {
        if (target != null)
            target.transform.position = data.targetPos;
        this.x = data.x;
        this.y = data.y;
        this.distance = data.distance;
        x_Result = data.x;
        y_Result = data.y;
        distanceResult = data.distance;
        isReplayData = false;
        if (replayManager.auto.isOn)
        {
            if (isReplay)
                isReplay = false;
            if (!canUpDate)
                canUpDate = true;
        }
    }
    public void CameraFollowTarget(Vector3 targetPos, float distance)
    {
        if (ReplaySetting.PlayStatus != PlayStatus.isReplay)
        {
            if (target != null)
                target.transform.position = targetPos;
            distanceResult = distance;
        }
        if (ReplaySetting.PlayStatus == PlayStatus.isEditor && RecordManager.Instance.recordStatus == RecordStatus.normal)
        {
            StopCoroutine(AddFollow());
            StartCoroutine(AddFollow());
        }
        //if (ReplaySetting.PlayStatus == PlayStatus.isEditor && RecordManager.Instance.recordStatus == RecordStatus.normal)
        //{
        //   AddRecordCamera(RecordManager.Instance.RecordTimer, 0.2f);
        //}
    }
    IEnumerator AddFollow()
    {
        var starttime = RecordManager.Instance.RecordTimer;
        yield return new WaitForSeconds(0.1f);
        AddRecordCamera(starttime, 0.2f);
    }
    private void RePlayStusChanged(IMessage obj)
    {
        ReplayStatus lastStatus = (ReplayStatus)obj.Data;
        if (lastStatus == ReplayStatus.normal)//从暂停切换到播放状态
        {
            if (!isReplay)
            {
                isReplay = true;
                if (stopTransform != Vector3.zero)
                {
                    transform.position = stopTransform;//重新赋值到暂停时相机的参数
                    transform.rotation = stopQuaternion;
                }
            }
        }
        else if (lastStatus == ReplayStatus.pause)//从播放切换到暂停状态
        {
            if (isReplay)
            {
                isReplay = false;
                stopTransform = transform.position;//记录播放暂停相机状态参数
                stopQuaternion = transform.rotation;

                canUpDate = false;
                if (!replayManager.auto.isOn)
                {
                    //还原相机参数
                    Vector3 angles = transform.eulerAngles;
                    x = angles.y;
                    y = angles.x;
                    target.transform.position = transform.position - transform.rotation * new Vector3(0, Top, -distance);
                    target.transform.position = new Vector3(target.position.x, initialTargetPosY, target.position.z);
                    //canUpDate = true;
                }
            }
        }
        else//结束状态回放结束
        {
            if (isReplay)
                isReplay = false;
        }
    }
    // Update is called once per frame
    void LateUpdate()
    {
        //if (isObservePerson)
        //{
        //    transform.rotation = Quaternion.Lerp(target.transform.rotation, rotation, Time.deltaTime * damping); ;
        //    transform.position = Vector3.Lerp(target.transform.position, position + positionOffset, Time.deltaTime * damping);
        //}
        if (target)
        {
            if (!isReplay && canUpDate)
            {
                UpdateCameraScale();

                if (rotateStart)
                    UpdateCameraRotation();
                else
                {
                    if (flag)
                    {
                        x = x_Result;
                        y = y_Result;
                    }
                }

                if (dragStart)
                    UpdateCameraTargetHorizontalPos();

                if (targetMoveing)
                    UpdateCameraTargetVerticalPos();

                UpdateCameraState();
            }
            else
            {
                if (isReplayData)
                {
                    //rePlaytimmer += (Time.smoothDeltaTime * ReplayManager.playSpeed);
                    //Debug.Log(rePlaydata.myTime + ":" + rePlaytimmer);
                    if (transform.position != rePlaydata.myPostion)
                    {
                        transform.position = Vector3.Lerp(startPos, rePlaydata.myPostion, (replayManager.replayTime - rePlaytimmer) / rePlaydata.myTime);
                    }
                    if (transform.rotation != rePlaydata.myRotation)
                    {
                        transform.rotation = Quaternion.Lerp(startRot, rePlaydata.myRotation, (replayManager.replayTime - rePlaytimmer) / rePlaydata.myTime);
                    }
                    if ((replayManager.replayTime - rePlaytimmer) >= rePlaydata.myTime)
                    {
                        transform.position = rePlaydata.myPostion;
                        transform.rotation = rePlaydata.myRotation;
                        isReplayData = false;
                        rePlaytimmer = 0;
                    }
                }
                else
                {
                    if (ReplaySetting.PlayStatus != PlayStatus.isReplay)
                    {
                        isReplay = false;
                    }
                }
            }
        }
    }
    public void AddRecordCamera(float startTime, float timeSpan)
    {
        var eventData = new EventData();
        eventData.time = startTime;
        eventData.cloneObjType = CloneObjType.None;
        eventData.eventType = RecordEventType.Camera;
        data.myRotation = Quaternion.Euler(y, x, 0.0f);
        Vector3 disVector = new Vector3(0.0f, Top, -distance);
        data.myPostion = data.myRotation * disVector + target.position;
        data.myTime = timeSpan;
        eventData.json = JsonUtility.ToJson(data);

        RecordManager.Instance.jsonData.eventDataList.Add(eventData);
    }
    /// <summary>
    /// 更新鼠标滚动操作传人的数据
    /// </summary>
    public void UpdateCameraScaleData(float mouseScrollData, float distanceRslt)
    {
        mouseScroll = mouseScrollData;
        distanceResult = distanceRslt;
        canUpDate = true;
    }

    /// <summary>
    /// 更新鼠标右键按住状态下，移动鼠标操作传入的数据
    /// </summary>
    /// <param name="mouseX"></param>
    /// <param name="mouseY"></param>
    public void UpdateCameraRotationData(CameraCmdArgs arg)
    {
        mouse_X = arg.mouseX;
        mouse_Y = arg.mouseY;
        rotateStart = arg.rotateStart;

        if (!rotateStart)
        {
            flag = true;
            x_Result = arg.x;
            y_Result = arg.y;
        }
        canUpDate = true;
    }

    /// <summary>
    /// 更新鼠标中键按住状态下，鼠标移动操作开始传入的数据
    /// </summary>
    public void UpdateDragEnterData(Vector3 mousePos, bool draging)
    {
        mousePostion = mousePos;
        dragStart = draging;

        var screenSpace = Camera.main.WorldToScreenPoint(target.position);
        prevPos = new Vector3(mousePostion.x, mousePostion.y, screenSpace.z);
        canUpDate = true;
    }

    /// <summary>
    /// 更新鼠标中键按住状态下，鼠标移动操作过程中传入的数据
    /// </summary>
    /// <param name="mousePos"></param>
    public void UpdateDragingData(Vector3 mousePos, bool draging)
    {
        mousePostion = mousePos;

        dragStart = draging;
    }

    /// <summary>
    /// 更新鼠标中键按住状态下，鼠标移动操作结束传入的数据
    /// </summary>
    /// <param name="mousePos"></param>
    public void UpdateDragExitData(Vector3 mousePos, bool draging)
    {
        prevPos = mousePos;

        dragStart = draging;
    }

    /// <summary>
    /// 更新按Up，Down键操作传入的数据
    /// </summary>
    /// <param name="keyAix"></param>
    public void UpdateCameraVerticalMoveData(float keyAix, bool moveing)
    {
        keyX = keyAix;
        targetMoveing = moveing;
        canUpDate = true;
    }

    /// <summary>
    /// 缩放，旋转，平移，竖直移动相机后，更新其位置，旋转状态
    /// </summary>
    private void UpdateCameraState()
    {
        rotation = Quaternion.Euler(y, x, 0.0f);
        Vector3 disVector = new Vector3(0.0f, Top, -distance);
        position = rotation * disVector + target.position;

        if (needDamping)
        {
            transform.rotation = Quaternion.Lerp(transform.rotation, rotation, Time.deltaTime * damping);
            transform.position = Vector3.Lerp(transform.position, position, Time.deltaTime * damping);
        }
        else
        {
            transform.rotation = rotation;
            transform.position = position;
        }
    }

    /// <summary>
    /// 相机缩放
    /// </summary>
    private void UpdateCameraScale()
    {
        distance -= mouseScroll * mSpeed;
        distance = Mathf.Clamp(distance, minDistance, maxDistance);

        if (mouseScroll == 0 && distanceResult != 0)
        {
            distance = distanceResult;
        }
    }

    /// <summary>
    /// 相机旋转
    /// </summary>
    private void UpdateCameraRotation()
    {
        x += mouse_X * xSpeed * 0.02f;
        y -= mouse_Y * ySpeed * 0.02f;

        y = ClampAngle(y, yMinLimit, yMaxLimit);
    }

    /// <summary>
    /// 相机水平移动
    /// </summary>
    private void UpdateCameraTargetHorizontalPos()
    {
        if (mousePostion.x > Screen.width || mousePostion.y > Screen.height)
        {
            return;
        }
        var screenSpace = Camera.main.WorldToScreenPoint(target.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;

        target.position += -offset;

        prevPos = currPos;
    }

    /// <summary>
    /// 相机竖直移动
    /// </summary>
    private void UpdateCameraTargetVerticalPos()
    {
        float targetPosY = target.position.y;

        if (targetPosY <= yMax && targetPosY >= initialTargetPosY)
        {
            if (keyX > 0)
            {
                target.transform.Translate(0, VerticalSpeed * Time.deltaTime, 0);
            }
            if (keyX < 0)
            {
                target.transform.Translate(0, -VerticalSpeed * Time.deltaTime, 0);
            }

            if (target.transform.position.y > yMax)
            {
                target.position = new Vector3(target.position.x, yMax, target.position.z);
            }
            if (target.transform.position.y < initialTargetPosY)
            {
                target.position = new Vector3(target.position.x, initialTargetPosY, target.position.z);
            }
        }
    }

    private float ClampAngle(float angle, float min, float max)
    {
        if (angle < -360)
            angle += 360;
        if (angle > 360)
            angle -= 360;
        return Mathf.Clamp(angle, min, max);
    }
}