/*
 * 由SharpDevelop创建。
 * 用户： 王刚
 * 日期: 2017/3/17
 * 时间: 9:23
 * 
 * 要改变这种模板请点击 工具|选项|代码编写|编辑标准头文件
 */
using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using Newtonsoft.Json.Linq;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

/// <summary>
/// 聊天记录类,将记录保存在本地.
/// </summary>
 [Serializable]
public class Chatlog
{
    const int MAX_MSG_COUNT = 500;
    string _uid = "", _friendid = "";

    public Dictionary<int, string> friendschat = new Dictionary<int, string>();
    public Dictionary<int, string> mywords = new Dictionary<int, string>();

    public void FriendSays(int ts, string talk)
    {
        addTalk(friendschat, ts, talk);
    }
    public void MeSay(string talk)
    {
        addTalk(mywords, (int)DateTime.Now.ToUnixTimeStamp(), talk);
    }

    public Chatlog(string uid, string friendid)
    {
        this._uid = uid;
        this._friendid = friendid;

        if (File.Exists(GetFileName()))
        {
            using(var sr=new FileStream(GetFileName(), FileMode.Open)) {
                var bf = new BinaryFormatter();
                var clog = (Chatlog)bf.Deserialize(sr);
                this.friendschat = clog.friendschat;
                this.mywords = clog.mywords;
            }
        }
    }

    /// <summary>
    /// 析构的时候自动保存
    /// </summary>
    ~Chatlog()
    {
        Save();
    }

    public void Save()
    {
        using (var sw = new FileStream(GetFileName(), FileMode.Create))
        {
            new BinaryFormatter().Serialize(sw, this);
        }
    }
    void addTalk(Dictionary<int, string> log, int ts, string talk)
    {
        if (!log.ContainsKey(ts))
        {
            log.Add(ts, talk);
            if (log.Count > MAX_MSG_COUNT)
            {
                log.Remove(log.Keys.First());
            }
        }
    }
    string GetFileName()
    {
        if (!Directory.Exists(UnityHelper.GetUserDataPath() + "/chatlog/"))
        { // 防御
            Directory.CreateDirectory(UnityHelper.GetUserDataPath() + "/chatlog/");
        }
        return UnityHelper.GetUserDataPath() + "/chatlog/" + _uid + "_" + _friendid; // 无后缀名
    }
}