/*----------------------------------------------------------------
    Copyright (C) 2018 Senparc

    文件名：CustomMessageHandler.cs
    文件功能描述：微信公众号自定义MessageHandler


    创建标识：Senparc - 20150312

    修改标识：Senparc - 20171027
    修改描述：v14.8.3 添加OnUnknownTypeRequest()方法Demo

----------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;

using Senparc.Weixin.MP.Entities;
using Senparc.Weixin.MP.Entities.Request;
using Senparc.Weixin.MP.MessageHandlers;
using Senparc.Weixin.MP.AdvancedAPIs;
using System.Threading.Tasks;
using Senparc.NeuChar.Entities.Request;
using Senparc.NeuChar.Helpers;
using Senparc.NeuChar.Entities;
using Senparc.Weixin;
using Senparc.Weixin.MP;
using BotSharp.Platform.Models.AiRequest;
using BotSharp.Platform.Abstractions;
using BotSharp.Platform.Dialogflow.Models;
using Microsoft.Extensions.Configuration;

#if NET45
using System.Web;
using System.Configuration;
using System.Web.Configuration;
using Senparc.Weixin.MP.Sample.CommonService.Utilities;
#else
using Microsoft.AspNetCore.Http;
#endif

namespace BotSharp.Channel.Weixin.Models
{
    /// <summary>
    /// 自定义MessageHandler
    /// 把MessageHandler作为基类，重写对应请求的处理方法
    /// </summary>
    public partial class CustomMessageHandler : MessageHandler<CustomMessageContext>
    {
        /*
         * 重要提示：v1.5起，MessageHandler提供了一个DefaultResponseMessage的抽象方法，
         * DefaultResponseMessage必须在子类中重写，用于返回没有处理过的消息类型（也可以用于默认消息，如帮助信息等）；
         * 其中所有原OnXX的抽象方法已经都改为虚方法，可以不必每个都重写。若不重写，默认返回DefaultResponseMessage方法中的结果。
         */


#if !DEBUG || NETSTANDARD1_6  || NETSTANDARD2_0 || NETCOREAPP2_0 || NETCOREAPP2_1
        string agentUrl = "http://localhost:12222/App/Weixin/4";
        string agentToken = "27C455F496044A87";
        string wiweihiKey = "CNadjJuWzyX5bz5Gn+/XoyqiqMa5DjXQ";
#else
        //下面的Url和Token可以用其他平台的消息，或者到www.weiweihi.com注册微信用户，将自动在“微信营销工具”下得到
        private string agentUrl = Config.SenparcWeixinSetting.AgentUrl;//这里使用了www.weiweihi.com微信自动托管平台
        private string agentToken = Config.SenparcWeixinSetting.AgentToken;//Token
        private string wiweihiKey = Config.SenparcWeixinSetting.SenparcWechatAgentKey;//WeiweihiKey专门用于对接www.Weiweihi.com平台，获取方式见：http://www.weiweihi.com/ApiDocuments/Item/25#51
#endif

#if NET45
        private string appId = Config.SenparcWeixinSetting.WeixinAppId;
        private string appSecret = Config.SenparcWeixinSetting.WeixinAppSecret;
#else
        private string appId = "appId";
        private string appSecret = "appSecret";
#endif

        /// <summary>
        /// 模板消息集合（Key：checkCode，Value：OpenId）
        /// </summary>
        public static Dictionary<string, string> TemplateMessageCollection = new Dictionary<string, string>();

        private IPlatformBuilder<AgentModel> nluPlatform = null;
        private readonly IConfiguration config;

        public CustomMessageHandler(IPlatformBuilder<AgentModel> nluPlatform, IConfiguration configuration, Stream inputStream, PostModel postModel, int maxRecordCount = 0)
            : base(inputStream, postModel, maxRecordCount)
        {
            this.nluPlatform = nluPlatform;
            this.config = configuration;

            //这里设置仅用于测试，实际开发可以在外部更全局的地方设置，
            //比如MessageHandler<MessageContext>.GlobalGlobalMessageContext.ExpireMinutes = 3。
            GlobalMessageContext.ExpireMinutes = 3;

            if (!string.IsNullOrEmpty(postModel.AppId))
            {
                appId = postModel.AppId;//通过第三方开放平台发送过来的请求
            }

            //在指定条件下，不使用消息去重
            base.OmitRepeatedMessageFunc = requestMessage =>
            {
                var textRequestMessage = requestMessage as RequestMessageText;
                if (textRequestMessage != null && textRequestMessage.Content == "容错")
                {
                    return false;
                }
                return true;
            };
        }

        public override void OnExecuting()
        {
            //测试MessageContext.StorageData
            if (CurrentMessageContext.StorageData == null)
            {
                CurrentMessageContext.StorageData = 0;
            }
            base.OnExecuting();
        }

        public override void OnExecuted()
        {
            base.OnExecuted();
            CurrentMessageContext.StorageData = ((int)CurrentMessageContext.StorageData) + 1;
        }

        /// <summary>
        /// 处理文字请求
        /// </summary>
        /// <returns></returns>
        public override IResponseMessageBase OnTextRequest(RequestMessageText requestMessage)
        {
            var defaultResponseMessage = base.CreateResponseMessage<ResponseMessageText>();

            var requestHandler =
                requestMessage.StartHandler()
                .Keyword("BotSharp",() => 
                {
                    var result = new StringBuilder();
                    result.AppendFormat("{0}", "你好！欢迎使用BotSharp NLU服务，BotSharp通过强大的自然语言理解技术让你更轻松的处理智能回复。");
                    defaultResponseMessage.Content = result.ToString();
                    return defaultResponseMessage;
                })
                .Keyword("再见", () =>
                {
                    var result = new StringBuilder();
                    result.AppendFormat("{0}", "谢谢使用，再见！");
                    defaultResponseMessage.Content = result.ToString();
                    return defaultResponseMessage;
                })
                .Default(() =>
                {
                    var result = new StringBuilder();

                    // send text to BotSharp platform emulator
                    var aIResponse = nluPlatform.TextRequest<AIResponseResult>(new AiRequest
                    {
                        Text = requestMessage.Content,
                        AgentId = config.GetValue<string>("weixinChannel:agentId"),
                        SessionId = requestMessage.FromUserName
                    });

                    result.AppendFormat("{0}", aIResponse.Result.Fulfillment.Speech);

                    defaultResponseMessage.Content = result.ToString();
                    return defaultResponseMessage;
                });

            return requestHandler.GetResponseMessage() as IResponseMessageBase;
        }

        /// <summary>
        /// 处理位置请求
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnLocationRequest(RequestMessageLocation requestMessage)
        {
            var locationService = new LocationService();
            var responseMessage = locationService.GetResponseMessage(requestMessage as RequestMessageLocation);
            return responseMessage;
        }

        public override IResponseMessageBase OnShortVideoRequest(RequestMessageShortVideo requestMessage)
        {
            var responseMessage = this.CreateResponseMessage<ResponseMessageText>();
            responseMessage.Content = "您刚才发送的是小视频";
            return responseMessage;
        }

        /// <summary>
        /// 处理图片请求
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnImageRequest(RequestMessageImage requestMessage)
        {
            //一隔一返回News或Image格式
            if (base.GlobalMessageContext.GetMessageContext(requestMessage).RequestMessages.Count() % 2 == 0)
            {
                var responseMessage = CreateResponseMessage<ResponseMessageNews>();

                responseMessage.Articles.Add(new Article()
                {
                    Title = "您刚才发送了图片信息",
                    Description = "您发送的图片将会显示在边上",
                    PicUrl = requestMessage.PicUrl,
                    Url = "http://sdk.weixin.senparc.com"
                });
                responseMessage.Articles.Add(new Article()
                {
                    Title = "第二条",
                    Description = "第二条带连接的内容",
                    PicUrl = requestMessage.PicUrl,
                    Url = "http://sdk.weixin.senparc.com"
                });

                return responseMessage;
            }
            else
            {
                var responseMessage = CreateResponseMessage<ResponseMessageImage>();
                responseMessage.Image.MediaId = requestMessage.MediaId;
                return responseMessage;
            }
        }

        /// <summary>
        /// 处理语音请求
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnVoiceRequest(RequestMessageVoice requestMessage)
        {
            var responseMessage = CreateResponseMessage<ResponseMessageMusic>();
            //上传缩略图
            //var accessToken = Containers.AccessTokenContainer.TryGetAccessToken(appId, appSecret);
            var uploadResult = Senparc.Weixin.MP.AdvancedAPIs.MediaApi.UploadTemporaryMedia(appId, UploadMediaFileType.image,
                                                         Server.GetMapPath("~/Images/Logo.jpg"));

            //设置音乐信息
            responseMessage.Music.Title = "天籁之音";
            responseMessage.Music.Description = "播放您上传的语音";
            responseMessage.Music.MusicUrl = "http://sdk.weixin.senparc.com/Media/GetVoice?mediaId=" + requestMessage.MediaId;
            responseMessage.Music.HQMusicUrl = "http://sdk.weixin.senparc.com/Media/GetVoice?mediaId=" + requestMessage.MediaId;
            responseMessage.Music.ThumbMediaId = uploadResult.media_id;

            //推送一条客服消息
            try
            {
                CustomApi.SendText(appId, WeixinOpenId, "本次上传的音频MediaId：" + requestMessage.MediaId);

            }
            catch
            {
            }

            return responseMessage;
        }
        /// <summary>
        /// 处理视频请求
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnVideoRequest(RequestMessageVideo requestMessage)
        {
            var responseMessage = CreateResponseMessage<ResponseMessageText>();
            responseMessage.Content = "您发送了一条视频信息，ID：" + requestMessage.MediaId;

            #region 上传素材并推送到客户端

            Task.Factory.StartNew(async () =>
             {
                 //上传素材
                 var dir = Server.GetMapPath("~/App_Data/TempVideo/");
                 var file = await MediaApi.GetAsync(appId, requestMessage.MediaId, dir);
                 var uploadResult = await MediaApi.UploadTemporaryMediaAsync(appId, UploadMediaFileType.video, file, 50000);
                 await CustomApi.SendVideoAsync(appId, base.WeixinOpenId, uploadResult.media_id, "这是您刚才发送的视频", "这是一条视频消息");
             }).ContinueWith(async task =>
             {
                 if (task.Exception != null)
                 {
                     WeixinTrace.Log("OnVideoRequest()储存Video过程发生错误：", task.Exception.Message);

                     var msg = string.Format("上传素材出错：{0}\r\n{1}",
                                task.Exception.Message,
                                task.Exception.InnerException != null
                                    ? task.Exception.InnerException.Message
                                    : null);
                     await CustomApi.SendTextAsync(appId, base.WeixinOpenId, msg);
                 }
             });

            #endregion

            return responseMessage;
        }


        /// <summary>
        /// 处理链接消息请求
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnLinkRequest(RequestMessageLink requestMessage)
        {
            var responseMessage = ResponseMessageBase.CreateFromRequestMessage<ResponseMessageText>(requestMessage);
            responseMessage.Content = string.Format(@"您发送了一条连接信息：
Title：{0}
Description:{1}
Url:{2}", requestMessage.Title, requestMessage.Description, requestMessage.Url);
            return responseMessage;
        }

        public override IResponseMessageBase OnFileRequest(RequestMessageFile requestMessage)
        {
            var responseMessage = requestMessage.CreateResponseMessage<ResponseMessageText>();
            responseMessage.Content = string.Format(@"您发送了一个文件：
文件名：{0}
说明:{1}
大小：{2}
MD5:{3}", requestMessage.Title, requestMessage.Description, requestMessage.FileTotalLen, requestMessage.FileMd5);
            return responseMessage;
        }

        /// <summary>
        /// 处理事件请求（这个方法一般不用重写，这里仅作为示例出现。除非需要在判断具体Event类型以外对Event信息进行统一操作
        /// </summary>
        /// <param name="requestMessage"></param>
        /// <returns></returns>
        public override IResponseMessageBase OnEventRequest(IRequestMessageEventBase requestMessage)
        {
            var eventResponseMessage = base.OnEventRequest(requestMessage);//对于Event下属分类的重写方法，见：CustomerMessageHandler_Events.cs
            //TODO: 对Event信息进行统一操作
            return eventResponseMessage;
        }

        public override IResponseMessageBase DefaultResponseMessage(IRequestMessageBase requestMessage)
        {
            /* 所有没有被处理的消息会默认返回这里的结果，
            * 因此，如果想把整个微信请求委托出去（例如需要使用分布式或从其他服务器获取请求），
            * 只需要在这里统一发出委托请求，如：
            * var responseMessage = MessageAgent.RequestResponseMessage(agentUrl, agentToken, RequestDocument.ToString());
            * return responseMessage;
            */

            var responseMessage = this.CreateResponseMessage<ResponseMessageText>();
            responseMessage.Content = "这条消息来自DefaultResponseMessage。";
            return responseMessage;
        }


        public override IResponseMessageBase OnUnknownTypeRequest(RequestMessageUnknownType requestMessage)
        {
            /*
             * 此方法用于应急处理SDK没有提供的消息类型，
             * 原始XML可以通过requestMessage.RequestDocument（或this.RequestDocument）获取到。
             * 如果不重写此方法，遇到未知的请求类型将会抛出异常（v14.8.3 之前的版本就是这么做的）
             */
            var msgType = Senparc.NeuChar.Helpers.MsgTypeHelper.GetRequestMsgTypeString(requestMessage.RequestDocument);
            var responseMessage = this.CreateResponseMessage<ResponseMessageText>();
            responseMessage.Content = "未知消息类型：" + msgType;

            WeixinTrace.SendCustomLog("未知请求消息类型", requestMessage.RequestDocument.ToString());//记录到日志中

            return responseMessage;
        }
    }
}