using UnityEngine;
using UnityEngine.Events;
using System.Collections;
using System.Collections.Generic;
using LitJson;

public class FollowManager
{

	private List<Follower> followList;
	private Dictionary<int, Follower> followDict;
	private List<Follower> beFollowedList;
	private Dictionary<int, Follower> beFollowedDict;


	public UnityEvent InitCompletion;
	public IntegerEvent FollowAdded;
	public ObjectEvent FollowDeleted;

	private bool m_Initializing = false;
	private bool m_Initialized = false;
	public bool initialized
	{
		get{ 
			return m_Initialized;
		}
	}

	public FollowManager()
	{
		followList = new List<Follower> ();
		followDict = new Dictionary<int, Follower> ();
		beFollowedList = new List<Follower> ();
		beFollowedDict = new Dictionary<int, Follower> ();

		InitCompletion = new UnityEvent ();
		FollowAdded = new IntegerEvent ();
		FollowDeleted = new ObjectEvent ();
	}


	public void Init()
	{
		if (m_Initialized) {
			InitCompletion.Invoke ();
			return;
		}

		m_Initializing = true;
		FollowRequest.GetFollowerList ().ResultEvent.AddListener ((bool success, JsonData data)=>{
			m_Initializing = false;
			if(success)
			{
				int myUserId = Session.GetInstance().myUserData.id;
				for(int i=0; i<data.Count; i++)
				{
					JsonData o = data[i];
					int me = JsonUtil.ToInt(o["me"]);
					int target = JsonUtil.ToInt(o["target"]);

					if(me == myUserId)
					{
						AddFollow(target);
					}
					else if(target == myUserId)
					{
						AddBefollow(me);
					}
				}

				m_Initialized = true;
				InitCompletion.Invoke();
			}
		});
	}


	public void Follow(int userId, CallBackUtil.BoolCallBack callBack)
	{
		FollowRequest.Follow (userId).ResultEvent.AddListener((bool success, JsonData data)=>{
			if(success)
			{
				int targetId = JsonUtil.ToInt(data);
				AddFollow(targetId);

				AlertPanel.Show(Language.GetStr("UserPanel", "followed").Replace("%NICK%", UserCache.GetNick(targetId)));
			}
			callBack(success);
		});
	}

	private void AddFollow(int userId)
	{
		if (IsFollow (userId))
			return;

		Follower follower = new Follower ();
		follower.userId = userId;

		followList.Add (follower);
		followDict.Add (userId, follower);

		FollowAdded.Invoke (userId);
	}


	public void Unfollow(int userId, CallBackUtil.BoolCallBack callBack)
	{
		FollowRequest.Unfollow (userId).ResultEvent.AddListener((bool success, JsonData data)=>{
			if(success)
			{
				int targetId = JsonUtil.ToInt(data);
				DeleteFollow(targetId);
				AlertPanel.Show(Language.GetStr("UserPanel", "unfollowed").Replace("%NICK%", UserCache.GetNick(targetId)));
			}
			callBack(success);
		});
	}

	public void DeleteFollow(int userId)
	{
		if (IsFollow (userId)) {
			Follower follower = followDict [userId];
			followList.Remove (follower);
			followDict.Remove (userId);

			FollowDeleted.Invoke (follower);
		}
	}


	public bool IsFollow(int userId)
	{
		return followDict.ContainsKey (userId);
	}


	public List<Follower> GetFollowList()
	{
		return followList;
	}

	public Follower GetFollower(int userId)
	{
		Follower follower = null;
		followDict.TryGetValue (userId, out follower);

		if (follower == null)
			beFollowedDict.TryGetValue (userId, out follower);

		return follower;
	}







	public bool IsBeFollowed(int userId)
	{
		return beFollowedDict.ContainsKey (userId);
	}

	public void AddBefollow(int userId)
	{
		if (IsBeFollowed (userId))
			return;

		Follower follower = new Follower ();
		follower.userId = userId;

		beFollowedList.Add (follower);
		beFollowedDict.Add (userId, follower);
	}

	public void DeleteBefollow(int userId)
	{
		if (IsBeFollowed (userId)) {
			Follower follower = beFollowedDict [userId];
			beFollowedList.Remove (follower);
			beFollowedDict.Remove (userId);
		}
	}







	private List<ChatMsg> tempMsgList;

	public void AddMsg(ChatMsg chatMsg)
	{
		if (!initialized) {

			if (tempMsgList == null)
				tempMsgList = new List<ChatMsg> ();

			tempMsgList.Add (chatMsg);

			if(!m_Initializing)
			{
				InitCompletion.AddListener (OnSelfInit);
				Init ();
			}
			return;
		}



	}

	private void OnSelfInit()
	{
		InitCompletion.RemoveListener (OnSelfInit);
		if(tempMsgList != null)
		{
			for(int i=0; i<tempMsgList.Count; i++)
			{
				AddMsg (tempMsgList [i]);
			}
			tempMsgList = null;
		}
	}







	private static FollowManager instance;
	public static FollowManager GetInstance()
	{
		if(instance == null)
		{
			instance = new FollowManager ();
		}
		return instance;
	}
}