//--------------------------------------------------------
//    [Author]:           玩个游戏
//    [  Date ]:           Tuesday, October 31, 2017
//--------------------------------------------------------
using UnityEngine;
using System.Collections;
using System.Collections.Generic;

using System;
using Cysharp.Threading.Tasks;

/// <summary>
/// 按钮组管理器，负责管理GroupButtonEx组件的组关系和状态切换
/// 暂用于预制体中的设置，如果是动态增删按钮需重测试逻辑
/// </summary>
public class GroupButtonExManager : MonoBehaviour
{
    // 按钮组列表
    private List<GroupButtonEx> m_Buttons = new List<GroupButtonEx>();

    [SerializeField] Color m_SelectedTextColor = UIHelper.GetUIColor(TextColType.titleSelectColor); // 选中状态文字颜色
    public Color selectedTextColor {
        get { return m_SelectedTextColor; }
        set { 
            m_SelectedTextColor = value;
        }
    }
    
    [SerializeField] Color m_NormalTextColor = UIHelper.GetUIColor(TextColType.titleUnSelectColor); // 未选中状态文字颜色
    public Color normalTextColor {
        get { return m_NormalTextColor; }
        set { 
            m_NormalTextColor = value;
        }
    }


    void OnEnable()
    {
        ExecuteNextFrame();
    }

    protected async void ExecuteNextFrame()
    {
        await UniTask.DelayFrame(1);
        UpdateAllButtonsState();
    }

    /// <summary>
    /// 将按钮添加到组
    /// </summary>
    /// <param name="button">要添加的按钮</param>
    public void AddButton(GroupButtonEx button)
    {
        if (button == null)
            return;

        // 如果按钮不在组中，添加到组
        if (!m_Buttons.Contains(button))
        {
            m_Buttons.Add(button);
        }
    }

    /// <summary>
    /// 从组中移除按钮
    /// </summary>
    /// <param name="button">要移除的按钮</param>
    public void RemoveButton(GroupButtonEx button)
    {
        if (button == null)
            return;

        m_Buttons.Remove(button);
    }

    /// <summary>
    /// 选中指定按钮，并取消其他按钮的选中状态
    /// </summary>
    /// <param name="button">要选中的按钮</param>
    public void SelectButton(GroupButtonEx button)
    {
        if (button == null)
            return;

        button.state = TitleBtnState.Click;
        // 取消其他按钮的选中状态
        foreach (var btn in m_Buttons)
        {
            if (btn != button)
            {
                btn.state = TitleBtnState.Normal;
            }
        }

        UpdateAllButtonsState();
    }

    /// <summary>
    /// 获取组中的所有按钮
    /// </summary>
    /// <returns>按钮列表</returns>
    public List<GroupButtonEx> GetButtons()
    {
        return new List<GroupButtonEx>(m_Buttons);
    }

    /// <summary>
    /// 获取组中当前选中的按钮
    /// </summary>
    /// <returns>选中的按钮，如果没有则返回null</returns>
    public GroupButtonEx GetSelectedButton()
    {
        foreach (var btn in m_Buttons)
        {
            if (btn.state == TitleBtnState.Click)
                return btn;
        }

        return null;
    }

    /// <summary>
    /// 清除所有按钮
    /// </summary>
    public void ClearButtons()
    {
        m_Buttons.Clear();
    }
    
    /// <summary>
    /// 更新所有按钮的状态
    /// </summary>
    private void UpdateAllButtonsState()
    {
        // SortBtns();

        foreach (var btn in m_Buttons)
        {
            btn.UpdateButtonState();
        }
    }

    bool sortyet = false;
    public void SortBtns(bool forceSort = false)
    {
        if (m_Buttons.Count <= 0)
            return;
            
        if (sortyet && !forceSort)
            return;

        m_Buttons.Sort((a, b) => { return a.transform.GetSiblingIndex() - b.transform.GetSiblingIndex(); });
        sortyet = true;
    }
    
    /// <summary>
    /// 获取按钮状态对应的文本颜色
    /// </summary>
    /// <param name="state">按钮状态</param>
    /// <returns>对应的文本颜色</returns>
    public Color GetTextColorForState(TitleBtnState state)
    {
        return state == TitleBtnState.Click ? m_SelectedTextColor : m_NormalTextColor;
    }
}