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

namespace GeneralTools
{
    [ExecuteInEditMode]
    public class ShowSeam : MonoBehaviour
    {
        public bool isShowSeam = false;
        public int widthCount = 0;
        public int heightCount = 0;
        [Range(0, 10)]
        public float lineWidth = 2;
        public Color lineColor = Color.white;


        public RectTransform linePrefab;
        public Transform seamCnavas;

        void Update()
        {
#if UNITY_EDITOR
            UtilityTool.DeleteChild(seamCnavas);
            if (!isShowSeam)
                return;
            //边
            CreateHorizontalLine(new Vector2(0, -Screen.height / 2));
            CreateHorizontalLine(new Vector2(0, Screen.height / 2));
            CreateVerticalLine(new Vector2(-Screen.width / 2, 0));
            CreateVerticalLine(new Vector2(Screen.width / 2, 0));
            //内部
            if (widthCount >= 2)
            {
                int lineCount = widthCount - 1;
                float leftX = -Screen.width / 2;
                float interval = Screen.width / widthCount;
                for (int i = 0; i < lineCount; i++)
                {
                    Vector2 newPos = new Vector2(leftX + interval * (i + 1), 0);
                    CreateVerticalLine(newPos);
                }

            }
            if (heightCount >= 2)
            {
                int lineCount = heightCount - 1;
                float downY = -Screen.height / 2;
                float interval = Screen.height / heightCount;
                for (int i = 0; i < lineCount; i++)
                {
                    Vector2 newPos = new Vector2(0, downY + interval * (i + 1));
                    CreateHorizontalLine(newPos);
                }
            }
#endif
        }


        protected void CreateHorizontalLine(Vector2 pos)
        {
            RectTransform newLine = Instantiate(linePrefab, seamCnavas);
            newLine.localScale = Vector3.one;
            newLine.eulerAngles = Vector3.zero;
            newLine.sizeDelta = new Vector2(Screen.width, lineWidth);
            newLine.localPosition = pos;
            newLine.GetComponent<Image>().color = lineColor;
        }
        protected void CreateVerticalLine(Vector2 pos)
        {
            RectTransform newLine = Instantiate(linePrefab, seamCnavas);
            newLine.localScale = Vector3.one;
            newLine.eulerAngles = Vector3.zero;
            newLine.sizeDelta = new Vector2(lineWidth, Screen.height);
            newLine.localPosition = pos;
            newLine.GetComponent<Image>().color = lineColor;
        }
    }
}