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

/// <summary>
/// 电线对象
/// </summary>
public class WireObject : MonoBehaviour
{
    private Transform start, end;
    private Vector3 startPos, endPos;
    private float sagRatio;
    private Transform parent;

    /// <summary>
    /// 创建
    /// </summary>
    /// <param name="_parent">父物体</param>
    /// <param name="_start">起点</param>
    /// <param name="_end">终点</param>
    /// <param name="_sagRatio">弧垂</param>
    /// <returns></returns>
    public static WireObject CreateWire(Transform _parent, Transform _start, Transform _end, float _sagRatio)
    {
        GameObject wire = new GameObject("wire");
        var lr = wire.AddComponent<LineRenderer>();
        //Material mat = new Material(WireCreater.Instance.linmaterial);
        //mat.color = WireCreater.Instance.wireColor;
        lr.material = WireCreater.Instance.linmaterial;
        var dev_wire = wire.AddComponent<WireObject>();
        dev_wire.start = _start;
        dev_wire.end = _end;
        dev_wire.sagRatio = _sagRatio;
        dev_wire.startPos = _start.position;
        dev_wire.endPos = _end.position;
        dev_wire.parent = _parent;
        if (_parent != null)
            wire.transform.SetParent(_parent);
        dev_wire.InitWire();
        return dev_wire;
    }

    /// <summary>
    /// 创建
    /// </summary>
    /// <param name="_parent">父物体</param>
    /// <param name="_start">起点</param>
    /// <param name="_end">终点</param>
    /// <param name="_sagRatio">弧垂</param>
    /// <param name="wireName">名称</param>
    /// <returns></returns>
    public static WireObject CreateWire(Transform _parent, Transform _start, Transform _end, float _sagRatio, string wireName)
    {
        GameObject wire = new GameObject(string.IsNullOrEmpty(wireName) ? "wire" : wireName);
        var lr = wire.AddComponent<LineRenderer>();
        //Material mat = new Material(Shader.Find("Unlit/Color"));
        //mat.color = WireCreater.Instance.wireColor;
        lr.material = WireCreater.Instance.linmaterial;
        var dev_wire = wire.AddComponent<WireObject>();
        dev_wire.start = _start;
        dev_wire.end = _end;
        dev_wire.sagRatio = _sagRatio;
        dev_wire.startPos = _start.position;
        dev_wire.endPos = _end.position;
        dev_wire.parent = _parent;
        if (_parent != null)
            wire.transform.SetParent(_parent);
        dev_wire.InitWire();
        return dev_wire;
    }

    /// <summary>
    /// 初始化连线
    /// </summary>
    public void InitWire()
    {
        for (int i = transform.childCount - 1; i >= 0; i--)
        {
            Destroy(transform.GetChild(i).gameObject);
        }
        WireCreater.Instance.CreateNewLine(this, start.position, end.position, sagRatio);
    }

    /// <summary>
    /// 设置弧垂
    /// </summary>
    /// <param name="_sagRatio"></param>
    public void SetRatio(float _sagRatio)
    {
        sagRatio = _sagRatio;
        InitWire();
    }

    Vector3 GetPointPos(int index)
    {
        LineRenderer lr = gameObject.GetComponent<LineRenderer>();
        return lr.GetPosition(index);
    }

    private void Update()
    {
        if (WireCreater.Instance.realTimeWire)
        {
            if (start.position != startPos || end.position != endPos)
            {
                InitWire();
                startPos = start.position;
                endPos = end.position;
            }
        }
    }
}