using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;
public class ButtonItem : MonoBehaviour {
    
    [Header("正常状态图片")]
    public Sprite normalSprite;
    [Header("选中图片")]
    public Sprite selectedSprite;
    [Header("选中字体颜色")]
    public Color fontSelectColor;
    [Header("正常字体颜色")]
    public Color fontNomalColor = Color.white;
    [Header("子物体字体大小")]
    public int childFontSize;

    public ButtonItem[] childButtonItems;

    public UnityEvent BtnClickState;

    public UnityEvent CancellationState;

    private Image btnImage;
    private Text  fontText;
    private GameObject rightBtn;
    private GameObject downBtn;

    private void Awake()
    {
        fontText = transform.Find("Text").GetComponent<Text>();
        btnImage = GetComponent<Image>();
        
        if (transform.Find("RightBtn")) rightBtn = transform.Find("RightBtn").gameObject;
        if (transform.Find("DownBtn")) downBtn = transform.Find("DownBtn").gameObject;      
    }
    private void Start()
    {
        Init();
    }
    public void Init()
    {
        if (childButtonItems == null || childButtonItems.Length == 0)
        {
            if (rightBtn != null) rightBtn.gameObject.SetActive(false);
            if (downBtn != null) downBtn.gameObject.SetActive(false);
        }
        else
        {
            for (int i = 0; i < childButtonItems.Length; i++)
            {
                childButtonItems[i].fontText.fontSize = childFontSize;
                childButtonItems[i].gameObject.SetActive(false);
            }
        }
    }
    public void Select()
    {
        btnImage.sprite = selectedSprite;
        fontText.color = fontSelectColor;
    }
    public void UnSelct()
    {
        btnImage.sprite = normalSprite;
        fontText.color = fontNomalColor;
    }
    public void Click()
    {
        BtnClickState?.Invoke();

        fontText.color = fontSelectColor;
        if (childButtonItems.Length == 0) return;

        if (rightBtn.gameObject.activeSelf)
        {
            downBtn.gameObject.SetActive(true);
            rightBtn.gameObject.SetActive(false);
            ShowOrHideChild(true);
        }
        else
        {
            rightBtn.gameObject.SetActive(true);
            downBtn.gameObject.SetActive(false);
            ShowOrHideChild(false);
        }       
    }

    /// <summary>
    /// 注销状态
    /// </summary>
    public void Cancellation()
	{
        CancellationState?.Invoke();
	}

    /// <summary>
    /// 显示/隐藏子物体
    /// </summary>
    /// <param name="show"></param>
    public void ShowOrHideChild(bool show = true)
    {
        foreach (var item in childButtonItems)
        {
            item.gameObject.SetActive(show);
        }
    }

}