using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using WeChatIn;
using WeChatIn.Entity;
using WeChatIn.Messages;
using ZTImage.Log;

namespace RichCreator.Server.Providers
{
    /// <summary>
    /// 微信提供
    /// </summary>
    public class WechatProvider
    {
        private WechatProvider()
        { }



        /// <summary>
        /// 微信客户端
        /// </summary>
        private WeChatClient client;
        private bool isLogin=false;
        private WeChatUser me;

        /// <summary>
        /// 向微信发送消息
        /// </summary>
        /// <param name="user">微信备注名</param>
        /// <param name="content">内容</param>
        public void SendMessage(string user, string content)
        {
            if (!isLogin)
            {
                return;
            }
            WeChatUser wuser = this.client.GetUserByRemarkName(user);
            if (user == null)
            {
                return;
            }
            this.SendMessage(wuser.UserName, content);
        }
        
        /// <summary>
        /// 登陆微信
        /// </summary>
        public void LoginWechat()
        {
            LoginWechat(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "qrcode.png"));
        }

        /// <summary>
        /// 登陆微信
        /// </summary>
        /// <param name="qrcodeSaveDir"></param>
        public void LoginWechat(string qrcodeSaveDir)
        {
            this.client = new WeChatClient();
            
            this.client.OnLogined = (c) =>
            {
                Trace.Info("login success,concat:" + c.Contacts.Count + ",nick:" + c.Me.NickName + ",username:" + c.Me.UserName);
                isLogin = true;
                this.client.OnReceive = OnReceiveMessage;
                me = this.client.GetUserByRemarkName("xiaozhuan");
            };
            
            this.client.Start(qrcodeSaveDir);
        }

        /// <summary>
        /// 收到消息回调
        /// </summary>
        /// <param name="msg"></param>
        private void OnReceiveMessage(Message msg)
        {
            if (me == null)
            {
                return;
            }

            if (msg.From == client.Me.UserName)
            {
                return;
            }

            if (msg.MessageType==MessageType.Text&&msg.From == me.UserName)
            {
                //来自小砖，执行命令
                ExecuteCommand(msg.Content);
                return;
            }

            string content = string.Empty;
            string showName = client.GetUserByUserName(msg.From).ShowName;
            if (msg.MessageType == MessageType.Text)
            {
                content = $"收到“{showName}”的消息,{msg.Content}";
            }
            else
            {
                content = $"收到“{showName}”的消息,消息类型：{msg.MessageType.ToString()}";
            }
            client.SendMessage(me.UserName, content);
        }

        /// <summary>
        /// 执行命令
        /// </summary>
        /// <param name="command"></param>
        private void ExecuteCommand(string command)
        {
            Trace.Info($"命令：{command}");
        }

        #region singleton
        private static WechatProvider instance;
        private static object lockHelper = new object();
        public static WechatProvider Instance
        {
            get
            {
                if (instance == null)
                {
                    lock (lockHelper)
                    {
                        if (instance == null)
                        {
                            instance = new WechatProvider();
                        }
                    }
                }
                return instance;
            }
        }
        
        #endregion
    }
}