using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using LitJson;

public class LocalSaver
{

	public const string KEY_ID = "ida";
	public const string KEY_NO_BINDING = "nb";

	public const string KEY_CHAT_IDS = "ci";
	public const string KEY_CHAT = "ch";
	public const string KEY_CHAT_TEMP_ID = "ct";

	public LocalSaver ()
	{
	}

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

	public void DeleteAll()
	{
		PlayerPrefsManager.DeleteAll();
	}


	public int LoadId()
	{
		if (PlayerPrefsManager.HasKey (KEY_ID))
			return PlayerPrefsManager.GetInt (KEY_ID);
		return 0;
	}

	public void SaveId(int id)
	{
		PlayerPrefsManager.Set (KEY_ID, id);
	}


	public int noAutoBinding
	{
		set
		{ 
			PlayerPrefsManager.Set (KEY_NO_BINDING + Session.myUserId, value);	
		}
		get
		{ 
			if (PlayerPrefsManager.HasKey (KEY_NO_BINDING + Session.myUserId))
				return PlayerPrefsManager.GetInt (KEY_NO_BINDING + Session.myUserId);
			return 0;
		}
	}





	private string GetChatIdsKey(int userId)
	{
		return KEY_CHAT_IDS + "_" + userId;
	}

	private string GetChatKey(int id, int userId)
	{
		return KEY_CHAT + "_" + userId + "_" + id;
	}

	public int NewTempChatId(int userId)
	{
		string key = KEY_CHAT_TEMP_ID + "_" + userId;
		int tempId = PlayerPrefsManager.GetInt (key) + 1;
		PlayerPrefsManager.Set (key, tempId);
		return -tempId;
	}


	public void AddChat(ChatMsg chatMsg, int userId)
	{
		string keyId = GetChatKey (chatMsg.id, userId);
		PlayerPrefsManager.Set (keyId, chatMsg.GetJson().ToJson());
		AddChatId (chatMsg.id, userId);
	}

	private void AddChatId(int id, int userId)
	{
		string key = GetChatIdsKey (userId);
		string chatIds = PlayerPrefsManager.GetString (key);
		if (StringUtil.Empty (chatIds)) {
			chatIds = id.ToString ();
		} else {
			chatIds += "|" + id.ToString ();
		}
		PlayerPrefsManager.Set (key, chatIds);

		if(!HasChatId(id))
			chatIdDict.Add (id, false);
	}

	public void RemoveChat(int id, int userId)
	{
		string key = GetChatIdsKey (userId);
		string keyChat = GetChatKey (id, userId);
		string chatIds = PlayerPrefsManager.GetString (key);
		int index = chatIds.IndexOf (id.ToString());
		if(index >= 0)
		{
			if (chatIds.Length > id.ToString ().Length) {
				if (index + id.ToString ().Length == chatIds.Length) {
					chatIds = chatIds.Replace ("|" + id.ToString (), "");
				} else {
					chatIds = chatIds.Replace (id.ToString () + "|", "");
				}
			} else {
				chatIds = "";
			}
			PlayerPrefsManager.Set (key, chatIds);
			PlayerPrefsManager.DeleteKey (keyChat);

			chatIdDict.Remove (id);
		}
	}

	public void ReplaceChat(int origin, ChatMsg replaceMsg, int userId)
	{
		string originChatKey = KEY_CHAT + "_" + userId + "_" + origin;
		string replaceChatKey = KEY_CHAT + "_" + userId + "_" + replaceMsg.id;
		string key = KEY_CHAT_IDS + "_" + userId.ToString ();

		string oldChatIds = PlayerPrefsManager.GetString (key);
		string newChatIds = oldChatIds.Replace (origin.ToString(), replaceMsg.id.ToString());

		if (!newChatIds.Equals (oldChatIds)) {
			PlayerPrefsManager.DeleteKey (originChatKey);
			PlayerPrefsManager.Set (key, newChatIds);
			PlayerPrefsManager.Set (replaceChatKey, replaceMsg.GetJson().ToJson());

			chatIdDict.Remove (origin);
			if(!HasChatId(replaceMsg.id))
				chatIdDict.Add (replaceMsg.id, false);
		}
	}


	public JsonData LoadChat(int userId)
	{
		chatIdDict.Clear ();

		JsonData list = JsonMapper.ToObject ("[]");

		string key = GetChatIdsKey (userId);
		if (!PlayerPrefsManager.HasKey (key))
			return list;

		string idStr = PlayerPrefsManager.GetString (key);
		int[] idArr = StringUtil.SplitToInt (idStr, '|');
		for(int i=0; i<idArr.Length; i++)
		{
			int id = idArr [i];

			string keyChat = GetChatKey (id, userId);
			if(PlayerPrefsManager.HasKey(keyChat))
			{
				string chatStr = PlayerPrefsManager.GetString (keyChat);
				try
				{
					JsonData json = JsonMapper.ToObject(chatStr);
					list.Add (json);
				}
				catch(System.Exception e)
				{
					Debuger.LogException (e);
				}
			}

			if(!HasChatId(id))
				chatIdDict.Add (id, false);
		}

		return list;
	}

	private Dictionary<int, bool> chatIdDict = new Dictionary<int, bool>();
	public bool HasChatId(int id)
	{
		return chatIdDict.ContainsKey (id);	
	}




}