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


public class NGUIEventBroadcaster : MonoBehaviour
{

    #region Broadcaster Registration

    static Dictionary<string, NGUIEventBroadcaster> Broadcasters;

    static void RegisterBroadcaster(NGUIEventBroadcaster broadcaster)
    {
        if (Broadcasters == null)
            Broadcasters = new Dictionary<string, NGUIEventBroadcaster>();

        if (Broadcasters.ContainsKey(broadcaster.broadcasterID))
            Debug.LogError("Duplicate Broadcaster ID detected: " + broadcaster.broadcasterID);
        else
            Broadcasters.Add(broadcaster.broadcasterID, broadcaster);
    }

    static void DeregisterBroadcaster(NGUIEventBroadcaster broadcaster)
    {
        if (Broadcasters == null) return;

        if (Broadcasters.ContainsKey(broadcaster.broadcasterID))
            Broadcasters.Remove(broadcaster.broadcasterID);
    }

    public static NGUIEventBroadcaster BroadcasterFromID(string id)
    {
        if (Broadcasters != null && Broadcasters.ContainsKey(id))
            return Broadcasters[id];
        else
            return null;
    }

    #endregion



    #region Event Registration

    static Dictionary<string, List<Action>> EventListeners;

    public static void AddListener(string broadcasterID, Action eventDelegate)
    {
        if (broadcasterID == null || broadcasterID.Length == 0 || eventDelegate == null) return;

        if (EventListeners == null)
            EventListeners = new Dictionary<string, List<Action>>();

        if (EventListeners.ContainsKey(broadcasterID) == false)
            EventListeners.Add(broadcasterID, new List<Action>());

        if (EventListeners[broadcasterID].Contains(eventDelegate) == false)
            EventListeners[broadcasterID].Add(eventDelegate);
    }

    public static void RemoveListener(string broadcasterID, Action eventDelegate)
    {
        if (broadcasterID == null || broadcasterID.Length == 0 || eventDelegate == null) return;
        if (EventListeners == null) return;
        if (EventListeners.ContainsKey(broadcasterID) == false) return;
        if (EventListeners[broadcasterID].Contains(eventDelegate))
            EventListeners[broadcasterID].Remove(eventDelegate);
    }


    static Dictionary<string, List<Action<string>>> EventWithIDListeners;

    public static void AddListener(string broadcasterID, Action<string> eventDelegate)
    {
        if (broadcasterID == null || broadcasterID.Length == 0 || eventDelegate == null) return;

        if (EventWithIDListeners == null)
            EventWithIDListeners = new Dictionary<string, List<Action<string>>>();

        if (EventWithIDListeners.ContainsKey(broadcasterID) == false)
            EventWithIDListeners.Add(broadcasterID, new List<Action<string>>());

        if (EventWithIDListeners[broadcasterID].Contains(eventDelegate) == false)
            EventWithIDListeners[broadcasterID].Add(eventDelegate);
    }

    public static void RemoveListener(string broadcasterID, Action<string> eventDelegate)
    {
        if (broadcasterID == null || broadcasterID.Length == 0 || eventDelegate == null) return;
        if (EventWithIDListeners == null) return;
        if (EventWithIDListeners.ContainsKey(broadcasterID) == false) return;
        if (EventWithIDListeners[broadcasterID].Contains(eventDelegate))
            EventWithIDListeners[broadcasterID].Remove(eventDelegate);
    }

    #endregion



    #region Instance

    public string broadcasterID = "";

    void OnEnable()
    {
        RegisterBroadcaster(this);
    }

    void OnDisable()
    {
        DeregisterBroadcaster(this);
    }

    void OnClick()
    {
        if (broadcasterID.Length == 0) return;

        if (EventListeners != null && EventListeners.ContainsKey(broadcasterID))
        {
            for (int i = 0; i < EventListeners[broadcasterID].Count; i++)
            {
                if (EventListeners[broadcasterID][i] != null)
                    EventListeners[broadcasterID][i]();
            }
        }

        if (EventWithIDListeners != null && EventWithIDListeners.ContainsKey(broadcasterID))
        {
            for (int i = 0; i < EventWithIDListeners[broadcasterID].Count; i++)
            {
                if (EventWithIDListeners[broadcasterID][i] != null)
                    EventWithIDListeners[broadcasterID][i](broadcasterID);
            }
        }

    }

    #endregion
}