using System;
using UnityEngine;

/// <summary>
/// 挑战标签页按钮的逻辑处理基类
/// 挂在与 ChallengeTabButton 同一个GameObject上
/// </summary>
[RequireComponent(typeof(ChallengeTabButton))]
public abstract class BaseChallengeTabHandler : MonoBehaviour
{
    protected ChallengeTabButton tabButton;
    private ChallengeTabButton.DisplayData displayData;

    protected virtual void Awake()
    {
        tabButton = GetComponent<ChallengeTabButton>();
        // 初始化一次 DisplayData，之后只修改变化的字段
        displayData = new ChallengeTabButton.DisplayData
        {
            Index = GetIndex(),
            RedpointId = GetRedpointId(),
            OpenState = GetOpenState(),
            FuncId = GetFuncId(),
            OnClickAction = GetOnClickAction()
        };
    }

    /// <summary>
    /// 订阅事件 (由 ChallengeTabWin 在 OnPreOpen 时调用)
    /// </summary>
    public virtual void SubscribeEvents()
    {
        // 订阅全局刷新事件
        TimeMgr.Instance.OnDayEvent += Refresh;
        FuncOpen.Instance.OnFuncStateChangeEvent += OnFuncStateChange;
        // 订阅此按钮特定的事件
        SubscribeToSpecificEvents();
    }

    /// <summary>
    /// 取消订阅事件 (由 ChallengeTabWin 在 OnPreClose 时调用)
    /// </summary>
    public virtual void UnsubscribeEvents()
    {
        TimeMgr.Instance.OnDayEvent -= Refresh;
        FuncOpen.Instance.OnFuncStateChangeEvent -= OnFuncStateChange;
        UnsubscribeFromSpecificEvents();
    }

    /// <summary>
    /// 刷新UI显示 (由 ChallengeTabWin 或事件回调调用)
    /// </summary>
    public void Refresh()
    {
        if (tabButton == null)
            return;
        displayData.CountInfo = GetCountInfo();
        tabButton.Display(displayData);
    }

    private void OnFuncStateChange(int funcId)
    {
        if (GetOpenState() == 0 && funcId == GetFuncId())
        {
            Refresh();
        }
    }

    /// <summary>
    /// 获取Tab的索引（用于Icon和Name）
    /// </summary>
    protected abstract int GetIndex();

    /// <summary>
    /// 获取开启方式 (0=FuncID, 1=活动)
    /// </summary>
    protected abstract int GetOpenState();

    /// <summary>
    /// 获取功能ID
    /// </summary>
    protected abstract int GetFuncId();

    /// <summary>
    /// 获取红点ID
    /// </summary>
    protected abstract int GetRedpointId();

    /// <summary>
    /// 获取数量的显示文本
    /// </summary>
    protected abstract string GetCountInfo();

    /// <summary>
    /// 获取按钮点击时触发的 *具体* 业务逻辑
    /// </summary>
    protected abstract Action GetOnClickAction();

    /// <summary>
    /// 订阅此Tab特有的事件
    /// </summary>
    protected abstract void SubscribeToSpecificEvents();

    /// <summary>
    /// 取消订阅此Tab特有的事件
    /// </summary>
    protected abstract void UnsubscribeFromSpecificEvents();
}