using System.Collections.Generic;
using UnityEngine;

public class EreaserManager : MonoBehaviour
{
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        EraseNearbyLines();
    }

    public float EraseRadius = 0.1f; // شعاع پاک کردن خطوط
    [System.Obsolete]
    private void EraseNearbyLines()
    {
        // پیدا کردن تمام پاک‌کن‌هایی که isDrawing == true دارند
        NetworkMarkerEraser[] erasers = FindObjectsOfType<NetworkMarkerEraser>();
        List<Transform> activeErasers = new List<Transform>();

        foreach (var eraser in erasers)
        {
            if (eraser.isDrawing)
            {
                activeErasers.Add(eraser.transform);
            }
        }


        if (activeErasers.Count == 0) return; // اگر هیچ پاک‌کن فعالی نبود، نیازی به پردازش نیست

        GameObject[] gos = GameObject.FindGameObjectsWithTag("draw");

        allLines = new List<LineRenderer>();

        foreach (GameObject go in gos)
        {
            LineRenderer lr = go.GetComponent<LineRenderer>();
            if (lr != null)
            {
                allLines.Add(lr);
            }
        }
        for (int lineIndex = allLines.Count - 1; lineIndex >= 0; lineIndex--)
        {
            LineRenderer line = allLines[lineIndex];
            if (line == null) continue;

            List<Vector3> segment = new List<Vector3>();
            List<List<Vector3>> segments = new List<List<Vector3>>();
            bool isErasing = false;

            for (int i = 0; i < line.positionCount; i++)
            {
                Vector3 point = line.GetPosition(i);
                bool shouldErase = false;

                // بررسی می‌کنیم که آیا نقطه در محدوده‌ی حداقل یکی از پاک‌کن‌های فعال قرار دارد
                foreach (Transform eraser in activeErasers)
                {
                    if (Vector3.Distance(eraser.position, point) <= EraseRadius)
                    {
                        shouldErase = true;
                        break;
                    }
                }

                if (!shouldErase)
                {
                    if (isErasing)
                    {
                        if (segment.Count > 0)
                        {
                            segments.Add(new List<Vector3>(segment));
                            segment.Clear();
                        }
                        isErasing = false;
                    }
                    segment.Add(point);
                }
                else
                {
                    isErasing = true;
                    if (segment.Count > 0)
                    {
                        segments.Add(new List<Vector3>(segment));
                        segment.Clear();
                    }
                }
            }
            if (segment.Count > 0)
                segments.Add(segment);

            allLines.RemoveAt(lineIndex);
            Destroy(line.gameObject);

            foreach (var seg in segments)
            {
                if (seg.Count > 1)
                {
                    CreateNewLine(seg, line);
                }
            }
        }
    }
    private void CreateNewLine(List<Vector3> points, LineRenderer line)
    {
        GameObject newLineObj = new GameObject("SplitLine");
        LineRenderer newLine = newLineObj.AddComponent<LineRenderer>();
        newLine.tag = "draw";
        newLine.positionCount = points.Count;
        newLine.material = line.material;
        newLine.startColor = line.startColor;
        newLine.endColor = line.endColor;
        newLine.SetPositions(points.ToArray());
        newLine.startWidth = line.startWidth;
        newLine.endWidth = line.endWidth;
        allLines.Add(newLine);
    }

    public void RegisterLine(LineRenderer line)
    {
        if (!allLines.Contains(line))
        {
            allLines.Add(line);
        }
    }

    public List<LineRenderer> allLines = new List<LineRenderer>();

}