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

/// <summary>
/// 描述：掉落道具名称
/// 作者：WJ
/// </summary>
public class DropItemName : MonoBehaviour
{
    /// <summary>
    /// 自身Transform
    /// </summary>
    private RectTransform mRectTransform = null;

    /// <summary>
    /// 父节点RectTransform
    /// </summary>
    private RectTransform mRootRectTransform = null;

    private Text nameText = null;
    private string itemName = "";
    private int quality = 0;
    private Transform target = null;

    /// <summary>
    /// 初始化
    /// </summary>
    /// <param name="role"></param>
    /// <param name="val"></param>
    public void Init(RectTransform rect, Transform _target, string _name, int _quality)
    {
        mRootRectTransform = rect;
        mRectTransform = transform as RectTransform;
        itemName = _name;
        quality = _quality;
        target = _target;

        nameText = transform.Find("Text").GetComponent<Text>();
        RefrashName();
    }

    /// <summary>
    /// 刷新名称
    /// </summary>
    private void RefrashName()
    {
        Color col = Color.white;
        switch (quality)
        {
            case 0:
            case 1:
                break;
            case 2:
                col = new Color(0x1B / 255.0f, 0xFF / 255.0f, 0x00 / 255.0f);
                break;
            case 3:
                col = new Color(0x00 / 255.0f, 0x35 / 255.0f, 0xFF / 255.0f);
                break;
            case 4:
                col = new Color(0xC2 / 255.0f, 0x00 / 255.0f, 0xFF / 255.0f);
                break;
            case 5:
                col = new Color(0xFF / 255.0f, 0x8D / 255.0f, 0x00 / 255.0f);
                break;
        }
        nameText.text = itemName;
        nameText.color = col;
    }

    // Update is called once per frame
    void Update()
    {
        if (target == null)
        {
            Destroy(gameObject);

            return;
        }

        mRectTransform.anchoredPosition = World2UI(target.position + Vector3.up * 0.5f);
    }


    /// <summary>
    /// 世界坐标转成UI坐标
    /// </summary>
    /// <param name="wpos">世界坐标</param>
    /// <returns>UI坐标</returns>
    public Vector2 World2UI(Vector3 wpos)
    {
        if (Camera.main == null)
        {
            return Vector2.zero;
        }

        //世界坐标 -> ViewPort坐标 
        Vector2 viewPos = Camera.main.WorldToViewportPoint(wpos);

        //ViewPort坐标 -> UGUI坐标   	
        return new Vector2(mRootRectTransform.rect.width * viewPos.x, mRootRectTransform.rect.height * viewPos.y);
    }
}