using NUnit.Framework;
using System.Collections.Generic;
using UnityEngine;

public class DrawGrid : MonoBehaviour
{
    public GameObject line_h;
    public GameObject line_v;

    public int lineCount;
    public float lineLength;
    public float lineThickness;
    float lineHeight = 0.001f;

    List<GameObject> detailLines = new();
    List<GameObject> ThickLines = new();
    bool detailLineActive = true;

    public Transform playerPos;
    public float detailLineDeactiveHeight = 20;

    private void Start()
    {
        for (int i = 0; i < lineCount; i++)
        {
            Vector3 linePos_h = new Vector3(0, 0, i);
            GameObject plusLine_h = Instantiate(line_h, linePos_h, line_h.transform.rotation, transform);
            GameObject minusLine_h = Instantiate(line_h, -linePos_h, line_h.transform.rotation, transform);

            Vector3 linePos_v = new Vector3(i, 0, 0);
            GameObject plusLine_v = Instantiate(line_v, linePos_v, line_v.transform.rotation, transform);
            GameObject minusLine_v = Instantiate(line_v, -linePos_v, line_v.transform.rotation, transform);

            plusLine_h.transform.localScale = new Vector3(lineLength, lineHeight, lineThickness);
            minusLine_h.transform.localScale = new Vector3(lineLength, lineHeight, lineThickness);
            plusLine_v.transform.localScale = new Vector3(lineLength, lineHeight, lineThickness);
            minusLine_v.transform.localScale = new Vector3(lineLength, lineHeight, lineThickness);

            if (i % 10 != 0) 
            {
                detailLines.Add(plusLine_h);
                detailLines.Add(minusLine_h);
                detailLines.Add(plusLine_v);
                detailLines.Add(minusLine_v);
            }
            else
            {
                ThickLines.Add(plusLine_h);
                ThickLines.Add(minusLine_h);
                ThickLines.Add(plusLine_v);
                ThickLines.Add(minusLine_v);
            }
        }
    }

    private void Update()
    {
        float playerHeight = playerPos.position.y;

        if (playerHeight > detailLineDeactiveHeight)
        {
            DeactivateDetailLine();
        }
        else
        {
            ActivateDetailLine();
        }
    }

    void ActivateDetailLine()
    {
        if (detailLineActive)
            return;

        foreach (GameObject line in detailLines)
        {
            line.gameObject.SetActive(true);
        }
        foreach (GameObject line in ThickLines)
        {
            line.transform.localScale = new Vector3(lineLength, lineHeight, lineThickness);
        }

        detailLineActive = true;
    }

    void DeactivateDetailLine()
    {
        if (!detailLineActive)
            return;

        foreach (GameObject line in detailLines)
        {
            line.gameObject.SetActive(false);
        }
        foreach (GameObject line in ThickLines)
        {
            line.transform.localScale = new Vector3(lineLength, lineHeight, lineThickness * 4);
        }

        detailLineActive = false;
    }

}