using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class UavFpsCamera : MonoSingleton<UavFpsCamera>
{
    public Camera uav_fps_camera;
    public RenderTexture camera_rendertexture;
    public delegate void UpdateCameraViwer(RenderTexture _rendertexture);
    public UpdateCameraViwer camera_update;

    private void Start()
    {
        camera_update += OnUpdateCameraTarget;
    }

    /// <summary>
    /// 更新目标
    /// </summary>
    /// <param name="_transform"></param>
    public void UpdateTarget(Transform _transform)
    {
        CreateCamera();
        if (_transform != null)
        {
            uav_fps_camera.transform.SetParent(_transform);
            uav_fps_camera.transform.localEulerAngles = new Vector3(90, 0, 0);
            camera_update?.Invoke(camera_rendertexture);
        }
        else
        {
            uav_fps_camera.transform.SetParent(transform);
            camera_update?.Invoke(null);
        }
    }

    /// <summary>
    /// 相机目标切换事件
    /// </summary>
    /// <param name="_rt"></param>
    public void OnUpdateCameraTarget(RenderTexture _rt)
    {
        if (_rt == null)
        {
            MainCanvasManager.webcam_panel.camera_rawimage.texture = null;
            MainCanvasManager.webcam_panel.OnNagetive();
        }
        else
        {
            MainCanvasManager.webcam_panel.camera_rawimage.texture = _rt;
            MainCanvasManager.webcam_panel.OnActive(false);
        }
    }

    public void CreateCamera()
    {
        var __uav_camera = new GameObject("UavCamera");
        uav_fps_camera = __uav_camera.AddComponent<Camera>();
        uav_fps_camera.targetTexture = camera_rendertexture;
    }

    private void OnDestroy()
    {
        camera_update -= OnUpdateCameraTarget;
    }
}