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
    JC.Unity.TouchChecker touchChecker = new JC.Unity.TouchChecker();
    //触摸模式开关
    public static bool isTouchMode = true;
    public static BowCamera ins;

    void Awake() {
        ins = this;
        localEulerAngles = transform.localEulerAngles;
    }

    void Start() {
        touchChecker.onMoved += delegate(Touch t, bool isOnUI) {
            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, -36, 36);
            this.localEulerAngles.y = Mathf.Clamp(this.localEulerAngles.y + t.deltaPosition.x * Time.deltaTime * 5, -180, 180);   
            this.transform.localEulerAngles = this.localEulerAngles; 
        };
        touchChecker.onEnded += delegate(Touch t, bool isOnUI) {
            if (!isOnUI) armBow.ADS_fire();
        };
    }

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

        //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"), -36, 36);
            this.localEulerAngles.y = Mathf.Clamp(this.localEulerAngles.y + 2f * Input.GetAxis("Mouse X"), -180, 180);   
            this.transform.localEulerAngles = this.localEulerAngles; 
            if (EventSystem.current.IsPointerOverGameObject()) return;
        }
        else if (isTouchMode) {
            touchChecker.Update();
        } else {
            //镜头看向九轴姿态虚拟节点
            this.transform.LookAt(CameraToLook.ins.point);
        }
    }

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

    //视野值记录
    float cameraFieldOfView = 60;
    //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;
        }
    }
}