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

public class SyncManager : MonoBehaviour
{

	public enum SyncType
	{
		Chat,
	}

	private List<SyncItem> list;

	void Awake()
	{
		DontDestroyOnLoad (this.gameObject);
	}

	// Update is called once per frame
	void FixedUpdate ()
	{
		for(int i=0; i<list.Count; i++)
		{
			list [i].Sync ();
		}
	}

	private static SyncManager instance;
	public static SyncManager GetInstance()
	{
		if (instance == null) {
			GameObject gameObj = new GameObject ("SyncManager");
			instance = gameObj.AddComponent<SyncManager> ();
			instance.list = new List<SyncItem> ();
		}
		return instance;
	}

	public static void Add(SyncType syncType, CallBackUtil.SimpleCallBack callBack, float interval)
	{
		SyncItem item = new SyncItem ();
		item.syncType = syncType;
		item.callBack = callBack;
		item.interval = interval;

		GetInstance().list.Add (item);
	}

	public static void Remove(SyncType syncType)
	{
		List<SyncItem> list = GetInstance ().list;
		for(int i=list.Count-1; i>=0; i--)
		{
			SyncItem item = list [i];
			if (item.syncType == syncType)
				list.RemoveAt (i);
		}
	}

	public static void ResetTime(SyncType syncType)
	{
		List<SyncItem> list = GetInstance ().list;
		for(int i=0; i<list.Count; i++)
		{
			SyncItem item = list [i];
			if(item.syncType == syncType)
				item.ResetTime ();
		}
	}

	public static void Sync(SyncType syncType, float minInterval=0)
	{
		List<SyncItem> list = GetInstance ().list;
		for(int i=0; i<list.Count; i++)
		{
			SyncItem item = list [i];
			if (item.syncType == syncType && item.GetTimeFromLastSync () > minInterval)
				item.Sync (true);
		}
	}
}

public class SyncItem
{
	public SyncManager.SyncType syncType;
	public float interval;
	public CallBackUtil.SimpleCallBack callBack;

	private float lastSyncTime;

	public SyncItem()
	{
		lastSyncTime = GameTime.time;
	}

	public void ResetTime()
	{
		lastSyncTime = GameTime.time;
	}

	public void Sync(bool forceSync=false)
	{
		if(forceSync || GetTimeFromLastSync() > interval)
		{
			callBack ();
			ResetTime ();
		}
	}

	public float GetTimeFromLastSync()
	{
		return GameTime.time - lastSyncTime;
	}
}