using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Rendering.Universal;

public class DrawController : MonoBehaviour
{
    public static DrawController instance;
    [HideInInspector]
    public Camera self;
    public LineRenderer lineRenderer;

    Stack<LineRenderer> lines = new Stack<LineRenderer>();
    private void Awake()
    {
        instance = this;
        self = GetComponent<Camera>();
        DontDestroyOnLoad(this);

        if (lineRenderer.material == null)
        {
            // 使用适合 LineRenderer 的着色器
            lineRenderer.material = new Material(Shader.Find("Sprites/Default"));
        }
    }
    private void Start()
    {

        gameObject.SetActive(false);
    }

    public LineRenderer LineRendererFactory()
    {
        var line = GameObject.Instantiate(lineRenderer, transform);
        lines.Push(line);
        return line;
    }

    public void Remove()
    {
        if (lines.Count > 0)
        {
            var line = lines.Pop();
            line.positionCount = 0;
            GameObject.Destroy(line.gameObject);
        }
    }

    public void Clear()
    {
        while (lines.Count > 0)
        {
            Remove();
        }
    }

    public static void SetupCameraStack(Camera subCamera, Camera baseCamera)
    {
        UniversalAdditionalCameraData additionalCameraData = baseCamera.GetUniversalAdditionalCameraData();
        if (!additionalCameraData.cameraStack.Contains(subCamera))
        {
            additionalCameraData.cameraStack.Add(subCamera);
        }
    }
}