using System;
using UnityEngine;
using UnityEngine.EventSystems;
/* 弓的相机 */
public class BowCamera : MonoBehaviour
{
    //相机组件
    Camera _cameraComp;
    Camera cameraComp
    {
        get
        {
            if (!_cameraComp) _cameraComp = GetComponent<Camera>();
            return _cameraComp;
        }
    }
    //控制的手臂弓
    ArmBow _armBow;
    ArmBow armBow
    {
        get
        {
            if (!_armBow) _armBow = GetComponentInChildren<ArmBow>();
            return _armBow;
        }
    }
    //本地欧拉角记录值
    Vector3 localEulerAngles;
    //触摸检测器
    JCUnityLib.TouchChecker touchChecker = new JCUnityLib.TouchChecker();
    //触摸模式开关
    private static bool _isTouchMode = true;
    public static bool isTouchMode
    {
        get
        {
            if (CommonConfig.isReleaseVersion) return false;
            return _isTouchMode;
        }
        set
        {
            _isTouchMode = value;
        }
    }
    //左右转动范围限制
    float[] limitRangeRotateY = { -80, 80 };
    //上下转动范围限制
    float[] limitRangeRotateX = { -80, 80 };
    //禁止逻辑，只用于同步状态和渲染，目前用于联机
    [NonSerialized] public bool banLogic = false;
    private static BowCamera _ins;
    public static BowCamera ins
    {
        get
        {
            if (!_ins)
            {
                _ins = GameObject.FindObjectOfType<BowCamera>();
            }
            return _ins;
        }
    }

    void Awake()
    {
        _ins = this;
        localEulerAngles = transform.localEulerAngles;
        if (CommonConfig.SpecialVersion1) {
            if (UnityEngine.SceneManagement.SceneManager.GetActiveScene().name.Equals("GameChallenge")) {
                this.cameraComp.fieldOfView = UserSettings.ins.bowRotateConvert.fieldOfView;
            }
        }
        RecordDefaultCameraFieldOfView();
        if (UserSettings.ins.bowCameraFixed && !CommonConfig.isReleaseVersion)
        {
            bowCameraFixed = new BowCameraFixed(this);
        }
    }

    void Start()
    {
        touchChecker.onMoved += delegate (Touch t, bool isOnUI)
        {
            if (banLogic) return;
            if (isOnUI) return;
            //触摸控制镜头和拉弓射箭
            this.localEulerAngles.x = Mathf.Clamp(this.localEulerAngles.x - t.deltaPosition.y * Time.deltaTime * 5, limitRangeRotateX[0], limitRangeRotateX[1]);
            this.localEulerAngles.y = Mathf.Clamp(this.localEulerAngles.y + t.deltaPosition.x * Time.deltaTime * 5, limitRangeRotateY[0], limitRangeRotateY[1]);
            this.transform.localEulerAngles = this.localEulerAngles;
        };
        touchChecker.onEnded += delegate (Touch t, bool isOnUI)
        {
            if (banLogic) return;
            if (!isOnUI) armBow.ADS_fire();
        };
    }

    void OnDestroy()
    {
        if (_ins == this) _ins = null;
    }

    void Update()
    {
        //更新相机视野
        if (cameraComp && !banCameraFieldOfView)
        {
            cameraComp.fieldOfView = cameraFieldOfView;
        }

        if (banLogic) return;

        //满足以下条件则阻止控制输入
        if (GameMgr.ins.gameOver)
        {
            return;
        }

        if (GameMgr.debugInEditor)
        {
            //鼠标控制镜头和拉弓射箭
            this.localEulerAngles.x = Mathf.Clamp(this.localEulerAngles.x - 2f * Input.GetAxis("Mouse Y"), limitRangeRotateX[0], limitRangeRotateX[1]);
            this.localEulerAngles.y = Mathf.Clamp(this.localEulerAngles.y + 2f * Input.GetAxis("Mouse X"), limitRangeRotateY[0], limitRangeRotateY[1]);
            this.transform.localEulerAngles = this.localEulerAngles;
            if (EventSystem.current.IsPointerOverGameObject()) return;
        }
        else if (isTouchMode)
        {
            touchChecker.Update();
        }
        else
        {
            if (SB_EventSystem.ins && SB_EventSystem.ins.simulateMouseIsAwaked) return;
            //需要-镜头看向九轴姿态虚拟节点
            needLookAtPoint = true;
        }
    }

    //需要-镜头看向九轴姿态虚拟节点?
    bool needLookAtPoint = false;
    //镜头旋转转换比值
    float[] _bowRotateConvertRate = null;
    float bowRotateConvertRate
    {
        get
        {
            if (_bowRotateConvertRate == null)
            {
                _bowRotateConvertRate = new float[] { UserSettings.ins.bowRotateConvert.GetRate() };
            }
            return _bowRotateConvertRate[0];
        }
    }
    void LateUpdate()
    {
#if UNITY_STANDALONE_WIN || UNITY_EDITOR
        if (InfraredDemo.DebugInEditor) needLookAtPoint = true;
#endif
        if (needLookAtPoint)
        {
            needLookAtPoint = false;
            //镜头看向九轴姿态虚拟节点
            this.transform.LookAt(CameraToLook.ins.point);
            // if (BowQuatDebug.ins) BowQuatDebug.ins.ShowRealBowQuat(this.transform.localEulerAngles); 
            if (!CommonConfig.isReleaseVersion)
            {
                //镜头旋转比值转换
                Vector3 localAngles = this.transform.localEulerAngles;
                localAngles.x = Mathf.Clamp((localAngles.x > 180 ? localAngles.x - 360 : localAngles.x) * bowRotateConvertRate,
                    limitRangeRotateX[0], limitRangeRotateX[1]);
                localAngles.y = Mathf.Clamp((localAngles.y > 180 ? localAngles.y - 360 : localAngles.y) * bowRotateConvertRate,
                    limitRangeRotateY[0], limitRangeRotateY[1]);
                if (bowCameraFixed != null)
                {
                    localAngles = bowCameraFixed.LimitBowAngle(localAngles);
                }
                this.transform.localEulerAngles = localAngles;
                // if (BowQuatDebug.ins) BowQuatDebug.ins.ShowGameBowQuat(this.transform.localEulerAngles);
            }
        }
        onAfterLateUpdate?.Invoke();
    }
    [NonSerialized] public Action onAfterLateUpdate;

    //---------------相机视野的相关操作---------------------

    //视野值记录
    float cameraFieldOfView = 60;
    [NonSerialized] public float defaultCameraFieldOfView = 60;
    private void RecordDefaultCameraFieldOfView()
    {
        defaultCameraFieldOfView = cameraComp.fieldOfView;
        cameraFieldOfView = defaultCameraFieldOfView;
    }
    //禁止相机视野改变
    [NonSerialized] public bool banCameraFieldOfView = false;

    public void SetCameraFieldOfView(float value)
    {
        cameraComp.fieldOfView = value;
    }

    public void SetCameraFieldOfViewRecord(float value)
    {
        cameraFieldOfView = value;
    }

    //拉弓时的相机视野值变化
    public void updateFollowPullBow()
    {
        // if (cameraFieldOfView > 40) {
        //     cameraFieldOfView -= 20 * Time.deltaTime;
        // } else {
        //     cameraFieldOfView = 40;
        // }
    }

    //松开拉弓时的相机视野值变化
    public void updateGiveUpPullBow()
    {
        // if (cameraFieldOfView < 60) {
        //     cameraFieldOfView += 20 * Time.deltaTime;
        // } else {
        //     cameraFieldOfView = 60;
        // }
    }

    // 2022-04-28
    // ------ 添加固定镜头选项后，新增的API ------
    bool isArrowFollowing = false;
    public void SetArrowFollowing(bool value)
    {
        isArrowFollowing = value;
        cameraComp.enabled = !isArrowFollowing;
        AutoSwitchCamera();
    }
    bool isScaleAimDisplaying = false;
    public void SetScaleAimDisplaying(bool value)
    {
        isScaleAimDisplaying = value;
        AutoSwitchCamera();
    }

    void AutoSwitchCamera()
    {
        if (bowCameraFixed == null)
        {
            cameraComp.enabled = !isArrowFollowing;
        }
        else
        {
            bowCameraFixed.gameObject.SetActive(!isScaleAimDisplaying && !isArrowFollowing);
            cameraComp.enabled = isScaleAimDisplaying && !isArrowFollowing;
        }
    }

    public Camera GetRenderCamera()
    {
        if (bowCameraFixed == null)
        {
            return cameraComp;
        }
        else
        {
            if (bowCameraFixed.gameObject.activeSelf)
            {
                return bowCameraFixed.camera;
            }
            else
            {
                return cameraComp;
            }
        }
    }

    public BowCameraFixed bowCameraFixed = null;
    public class BowCameraFixed
    {
        public GameObject gameObject;
        public Transform transform;
        public Camera camera;
        private UnityStandardAssets.ImageEffects.Blur blur;
        //bowCameraComponent
        BowCamera bowCamera;
        private Camera targetCamera;
        private UnityStandardAssets.ImageEffects.Blur targetBlur;

        public BowCameraFixed(BowCamera bowCamera)
        {
            this.bowCamera = bowCamera;
            gameObject = new GameObject("BowCameraFixed");
            transform = gameObject.transform;
            //复制Camera组件
            targetCamera = bowCamera.cameraComp;
            camera = gameObject.AddComponent<Camera>();
            camera.tag = "MainCamera";
            camera.clearFlags = targetCamera.clearFlags;
            camera.backgroundColor = targetCamera.backgroundColor;
            camera.cullingMask = targetCamera.cullingMask;
            camera.fieldOfView = targetCamera.fieldOfView;
            camera.nearClipPlane = targetCamera.nearClipPlane;
            camera.depth = targetCamera.depth + 0.1f;
            camera.renderingPath = targetCamera.renderingPath;
            //复制Blur组件
            targetBlur = bowCamera.GetComponent<UnityStandardAssets.ImageEffects.Blur>();
            if (targetBlur)
            {
                blur = gameObject.AddComponent<UnityStandardAssets.ImageEffects.Blur>();
                blur.enabled = targetBlur.enabled;
                blur.blurShader = targetBlur.blurShader;
                blur.blurSpread = targetBlur.blurSpread;
                blur.iterations = targetBlur.iterations;
            }
            //设置Transform属性
            transform.parent = bowCamera.transform.parent;
            transform.localPosition = bowCamera.transform.localPosition;
            transform.localScale = bowCamera.transform.localScale;
            transform.localRotation = Quaternion.identity;
            //监听和驱动LateUpdate
            bowCamera.onAfterLateUpdate += LateUpdate;
            //切换镜头
            bowCamera.AutoSwitchCamera();

            InitForLimitBound();
        }

        void LateUpdate()
        {
            if (gameObject.activeSelf)
            {
                CrossHair.ins.UpdatePostionWhenFixedCamera();
            }
            if (blur)
            {
                blur.enabled = targetBlur.enabled;
                if (blur.enabled)
                {
                    blur.blurShader = targetBlur.blurShader;
                    blur.blurSpread = targetBlur.blurSpread;
                    blur.iterations = targetBlur.iterations;
                }
            }
        }

        //边界限制
        float[] rangeRotateY = { -80, 80 };
        float rangeRotateX = 25;
        Vector3 vecF;
        Vector3 vecU;
        public int outBoundIndex = -1; //-1为未出界
        void InitForLimitBound()
        {
            int _leftNum = 4;//以前的设置
            //如果是红外设备。不限制旋转
            if (BluetoothAim.ins && (BluetoothAim.ins.isMainConnectToInfraredDevice() || BluetoothAim.ins.isMainConnectToGun()))
            {
                //// 如果不启用边界限制，则直接设置默认的范围
                //rangeRotateY = new float[] { -180, 180 }; // 设置默认的无边界限制值（根据需求调整）
                //rangeRotateX = camera.fieldOfView / 2;
                //vecF = Quaternion.AngleAxis(rangeRotateX, Vector3.right) * Vector3.forward;
                //vecU = Quaternion.AngleAxis(rangeRotateX, Vector3.right) * Vector3.up;

                _leftNum = 0;
            }

            for (int i = (int)rangeRotateY[0]; i < 0; i++)
            {
                Vector3 pos = transform.position + Quaternion.AngleAxis(i, Vector3.up) * transform.forward;
                pos = camera.WorldToViewportPoint(pos);
                if (pos.x >= 0)
                {
                    rangeRotateY[0] = i;
                    rangeRotateY[1] = -i - _leftNum;
                    break;
                }
            }
            rangeRotateX = camera.fieldOfView / 2;
            vecF = Quaternion.AngleAxis(rangeRotateX, Vector3.right) * Vector3.forward;
            vecU = Quaternion.AngleAxis(rangeRotateX, Vector3.right) * Vector3.up;
        }
        public Vector3 LimitBowAngle(Vector3 outAngle)
        {
            float angleY = outAngle.y;
            float angleX = outAngle.x;
            outAngle.y = Mathf.Clamp(angleY, rangeRotateY[0], rangeRotateY[1]);
            Vector3 vec = Quaternion.AngleAxis(outAngle.y, vecU) * vecF;
            float rx = (float)(Math.Asin(vec.y) / Math.PI * 180) * (angleX < 0 ? 1 : -1);
            if (angleY < rangeRotateY[0]) outBoundIndex = 0;
            else if (angleY > rangeRotateY[1]) outBoundIndex = 1;
            else if (angleX < -rangeRotateX) outBoundIndex = 2;
            else if (angleX > rangeRotateX) outBoundIndex = 3;
            else outBoundIndex = -1;
            if (Mathf.Abs(angleX) > Mathf.Abs(rx))
            {
                outAngle.x = rx;
            }
            //因为Vector3是struct，传递给函数是值传递而非引用传递
            return outAngle;
        }
    }
}