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

public class DrawLine : MonoBehaviour
{
    public int zoom;
    bool IsDrawing;//to test if it finishes
    bool IsDrawingInit;//test when zoom changes,if there are still lines


    private int tempZoom;

    private void Start()
    {
        IsDrawing = true;
        IsDrawingInit = true;
        tempZoom = this.zoom;
    }


	void Update()
    {
        zoom = OnlineMaps.instance.zoom;
        ZoomTest();

        if(IsDrawing)
        {
            if (!IsDrawingInit)
            {
                GameObject.Destroy(GameObject.Find("Drawings"));
                IsDrawingInit = true;
            }
            else if (zoom < 6)
                {
                    Draw(12);
                }
            else if (zoom < 9 && zoom >= 6)
                {
                    Draw(4);
                }
            else if(zoom < 11 && zoom >=9)
                {
                    Draw(1);
                }
            else if(zoom <16 && zoom >= 11)
                {
                    Draw(0.5f);
                }
            else
                {
                    Draw(0.1f);

                }
        }
    }

    /// <summary>
    /// 绘制经纬线
    /// </summary>
    /// <param name="plus"></param>经纬线间隔
    void Draw(float plus)
    {
        OnlineMapsDrawingLine _line;
        for (float i = -180; i <= 180; i = i + plus)
        {
            List<Vector2> line_1 = new List<Vector2>
            {
                new Vector2(-180,i/2),
                new Vector2(-90,i/2),
                new Vector2(0,i/2),
                new Vector2(90,i/2),
                new Vector2(180,i/2)
            };

            _line = new OnlineMapsDrawingLine(line_1, Color.white, 0.5f);
            OnlineMaps.instance.AddDrawingElement(_line);
            

            List<Vector2> line_2 = new List<Vector2>
            {
                new Vector2(i,-90),
                new Vector2(i,-45),
                new Vector2(i,0),
                new Vector2(i,45),
                new Vector2(i,90)
            };

            _line = new OnlineMapsDrawingLine(line_2, Color.white, 0.5f);
            OnlineMaps.instance.AddDrawingElement(_line);

            if (i == 180)
            {
                IsDrawing = false;
                IsDrawingInit = false;
            }
        }
    }


    void ZoomTest()
    {
        if((tempZoom != zoom)&&(zoom==6 || zoom == 9 || zoom == 11 || zoom == 16))
        {
            IsDrawing = true;
        }
        tempZoom = zoom;
    }
}