#include "netclient.h"
#include "../model/datacenter.h"
using namespace model;

namespace network {
	NetClient::NetClient(model::DataCenter* dataCenter)
		:dataCenter(dataCenter)
	{
		initWebSocket();
	}

	void NetClient::ping()
	{
		QNetworkRequest httpReq;
		httpReq.setUrl(QUrl(HTTP_URL + "/ping"));

		QNetworkReply* httpResp = httpClient.get(httpReq);
		connect(httpResp, &QNetworkReply::finished, this, [=]() {
			//到这里面，说明响应已经回了
			if (httpResp->error() != QNetworkReply::NoError) {
				//请求失败
				LOG() << "HTTP请求失败！！！" << httpResp->errorString();
				httpResp->deleteLater();
				return;
			}
			//获取到响应的body
			QByteArray body = httpResp->readAll();
			LOG() << "响应的内容: " << body;
			httpResp->deleteLater();
			});
	}


	void NetClient::initWebSocket()
	{
		//准备好所需要的信号槽
		connect(&websocketClient, &QWebSocket::connected, this, [=]() {
			LOG() << "webSocket 连接成功";
			//连接成功之后,进行发送身份认证
			sendAuth();
			});

		connect(&websocketClient, &QWebSocket::disconnected, this, [=]() {
			LOG() << "webSocket 连接断开";
			});

		connect(&websocketClient, &QWebSocket::textMessageReceived, this, [=](const QString& message) {
			LOG() << "webSocket 收到文本消息 " << message;
			});
		
		connect(&websocketClient, &QWebSocket::binaryMessageReceived, this, [=](const QByteArray& byteArray) {
			LOG() << "webSocket 收到二进制的消息" << byteArray.length();
			bite_im::NotifyMessage notifyMessage;
			notifyMessage.deserialize(&serializer, byteArray);
			handleWsResponse(notifyMessage);
			});

		//和服务器真正建立连接
		websocketClient.open(WEBSOCKET_URL);
	}

	void NetClient::handleWsResponse(const bite_im::NotifyMessage& notifyMessage)
	{
		if (notifyMessage.notifyType() == bite_im::NotifyTypeGadget::NotifyType::CHAT_MESSAGE_NOTIFY) {
			//收到消息
			//把pb中的MessageInfo转成客户端自己的message
			Message message;
			message.load(notifyMessage.newMessageInfo().messageInfo());
			//针对自己的message做进一步的处理
			handleWsMessage(message);
		}
		else if (notifyMessage.notifyType() == bite_im::NotifyTypeGadget::NotifyType::CHAT_SESSION_CREATE_NOTIFY) {

		}
		else if (notifyMessage.notifyType() == bite_im::NotifyTypeGadget::NotifyType::FRIEND_ADD_APPLY_NOTIFY) {

		}
		else if (notifyMessage.notifyType() == bite_im::NotifyTypeGadget::NotifyType::FRIEND_ADD_PROCESS_NOTIFY) {

		}
		else if (notifyMessage.notifyType() == bite_im::NotifyTypeGadget::NotifyType::FRIEND_REMOVE_NOTIFY) {

		}
	}

	void NetClient::handleWsMessage(const model::Message& message)
	{
		// 这里要考虑两种情况
		QList<Message>* messageList = dataCenter->getRecentMessageList(message.chatSessionId);
		if (messageList == nullptr) {
			//如果当前这个消息所属的会话，里面的消息列表没有在本地加载,此时需要通过网络先加载整个消息列表
			connect(dataCenter, &DataCenter::getRecentMessageListDoneNoUI, this, &NetClient::receiveMessage, Qt::UniqueConnection);
			dataCenter->getRecnetMessageListAsync(message.chatSessionId, false);
		}
		else {
			//若已经在本地加载了，直接把这个消息尾插到消息列表中即可
			messageList->push_back(message);
			this->receiveMessage(message.chatSessionId);
		}
	}

	void NetClient::sendAuth()
	{
		bite_im::ClientAuthenticationReq req;
		req.setRequestId(makeRequestId());
		req.setSessionId(dataCenter->getLoginSessionId());
		QByteArray body = req.serialize(&serializer);
		websocketClient.sendBinaryMessage(body);
		LOG() << "[WS身份认证] requestId= " << req.requestId() << ",loginSessionId= " << req.sessionId();

	}

	QString NetClient::makeRequestId()
	{
		//基本的要求，确保每个请求的Id都是不重复的（唯一的）
		//通过UUID实现上述的效果
		return "R" + QUuid::createUuid().toString().sliced(25, 12);
	}

	//通过这个函数，把发送HTTP请求的操作封装一下
	QNetworkReply* NetClient::sendHttpRequest(const QString& apiPath, const QByteArray& body)
	{
		//构造出HTTP请求
		QNetworkRequest httpReq;
		httpReq.setUrl(QUrl(HTTP_URL + apiPath));
		httpReq.setHeader(QNetworkRequest::ContentTypeHeader, "application/x-protobuf");

		//发起HTTP请求
		QNetworkReply* httpResp = httpClient.post(httpReq, body);
		return httpResp;
	}

	//在这个函数内部，完成具体的网络通信即可
	void NetClient::getMyself(const QString& loginSessionId) 
	{
		//构造出HTTP请求body部分
		bite_im::GetUserInfoReq req;
		req.setRequestId(makeRequestId());
		req.setSessionId(loginSessionId);
		QByteArray body = req.serialize(&serializer);
		LOG() << "获取个人信息->发送请求： requestId=" << req.requestId() << ", loginSessionId=" << loginSessionId;

		//构造出HTTP请求
		QNetworkReply* httpResp = sendHttpRequest("/service/user/get_user_info", body);

		//通过信号槽，获取到当前的响应
		connect(httpResp, &QNetworkReply::finished, this, [=]() {
			//if (httpResp->error() != QNetworkReply::NoError) {
			//	//说明HTTP请求出错了，
			//	LOG() << "HTTP error: " << httpResp->errorString();
			//	httpResp->deleteLater();
			//	return;
			//}
			////说明拿到了body
			//QByteArray respBody = httpResp->readAll();

			////针对body进行反序列化,解析成对象
			//bite_im::GetUserInfoRsp respObj;
			//respObj.deserialize(&serializer, respBody);

			////判定一下业务上是否出错
			//if (!respObj.success()) {
			//	LOG() << "requestId= " << respObj.requestId() << ", errmsg=" << respObj.errmsg();
			//	httpResp->deleteLater();
			//	return;
			//}

			//继续处理后续的业务逻辑
			//获取http回复
			bool ok = false;
			QString reason;
			auto resp = handleHttpResponse<bite_im::GetUserInfoRsp>(httpResp, &ok, &reason);
			//判定响应是否正确
			if (!ok) {
				LOG() << "获取个人信息->出错 requestId= " << req.requestId() << ", reason= " << reason;
				return;	
			}

			//把响应的数据保存到DataCenter
			dataCenter->resetMyself(resp);

			//通知调用逻辑，响应已经处理完成了,仍然通过信号槽通知
			emit dataCenter->getMyselfDone();

			//打印日志
			LOG() << "获取个人信息->响应处理完毕 requestId" << req.requestId();
			});
	}

	void NetClient::getFriendList(const QString& loginSessionId)
	{
		//通过protobuf构造body
		bite_im::GetFriendListReq req;
		req.setRequestId(makeRequestId());
		req.setSessionId(loginSessionId);
		QByteArray body = req.serialize(&serializer);
		LOG() << "获取好友列表->发送请求 requestId=" << req.requestId() << ", loginSessionId= " << loginSessionId;

		//发送HTTP请求
		QNetworkReply* httpResp = this->sendHttpRequest("/service/friend/get_friend_list", body);

		//处理响应
		connect(httpResp, &QNetworkReply::finished, this, [=]() {
			//解析响应
			bool ok = false;
			QString reason;
			auto friendListResp = this->handleHttpResponse<bite_im::GetFriendListRsp>(httpResp, &ok, &reason);

			if (!ok) {
				LOG() << "获取好友列表->失败 requestId= " << req.requestId() << ", reason= " << reason;
			}
			LOG() << "获取好友列表->成功";

			//把结果保存在DataCenter中
			dataCenter->resetFriendList(friendListResp);

			// 发送信号
			emit dataCenter->getFriendListDone();
			});
	}

	void NetClient::getChatSessionList(const QString& loginSessionId)
	{
		//通过protobuf构造body
		bite_im::GetChatSessionListReq req;
		req.setRequestId(makeRequestId());
		req.setSessionId(loginSessionId);
		QByteArray body = req.serialize(&serializer);

		LOG() << "获取会话列表->发送请求 requestId= " << req.requestId() << ", loginSessionId= " << loginSessionId;

		//发送HTTP请求                               
		QNetworkReply* resp = this->sendHttpRequest("/service/friend/get_chat_session_list", body);

		//针对响应进行处理
		connect(resp, &QNetworkReply::finished, this, [=]() {
			//解析响应
			bool ok = false;
			QString reason;
			auto pbResp = this->handleHttpResponse<bite_im::GetChatSessionListRsp>(resp, &ok, &reason);

			//判断响应是否正确
			if (!ok) {
				LOG() << "获取会话列表->失败 reason= " << reason;
				return;
			}

			//到这里说明没有问题，把得到的数据，写入到DataCenter中
			dataCenter->resetChatSessionList(pbResp);

			//通知调用者，响应已经处理完毕了
			emit dataCenter->getChatSessionListDone();

			//打印日志
			LOG() << "获取会话列表->处理响应完毕 requestId= " << pbResp->requestId();
			});
	}

	void NetClient::getApplyList(const QString& loginSessionId)
	{
		//通过protobuf构造body
		bite_im::GetPendingFriendEventListReq req;
		req.setRequestId(makeRequestId());
		req.setSessionId(loginSessionId);
		QByteArray body = req.serialize(&serializer);
		LOG() << "获取好友申请列表->发送请求 reason= " << req.requestId() << ", loginSessonId= " << loginSessionId;

		//发送HTTP请求
		QNetworkReply* resp = this->sendHttpRequest("/service/friend/get_pending_friend_events", body);

		//处理响应
		connect(resp, &QNetworkReply::finished, this, [=]() {
			//解析响应
			bool ok = false;
			QString reason;
			auto pbResp = this->handleHttpResponse<bite_im::GetPendingFriendEventListRsp>(resp, &ok, &reason);
			//判定结果是否正确
			if (!ok) {
				LOG() << "获取好友申请列表->失败 reason= " << reason;
				return;
			}

			//拿到的数据，写入到DataCenter中
			dataCenter->resetApplyList(pbResp);

			//发送信号通知界面，已经处理完毕
			emit dataCenter->getApplyListDone();

			LOG() << "获取好友申请列表->处理响应完成 requestId= " << req.requestId();

			});

	}

	void NetClient::getRecentMessageList(const QString& loginSessionId, const QString& chatSessionId, bool updateUI)
	{
		//通过protobuf构造请求body
		bite_im::GetRecentMsgReq req;
		req.setRequestId(makeRequestId());
		req.setChatSessionId(chatSessionId);
		req.setMsgCount(50);
		req.setSessionId(loginSessionId);
		QByteArray body = req.serialize(&serializer);
		LOG() << "获取最近消息->发送请求 requestId= " << req.requestId() << ", loginSessionId= " << loginSessionId;

		//发送http请求
		QNetworkReply* resp = this->sendHttpRequest("/service/message_storage/get_recent", body);

		//处理响应
		connect(resp, &QNetworkReply::finished, this, [=]() {
			//解析响应，反序列化
			bool ok = false;
			QString reason;
			auto pbResp = this->handleHttpResponse<bite_im::GetRecentMsgRsp>(resp, &ok, &reason);

			//判定响应是否出错
			if (!ok) {
				LOG() << "获取最近消息->失败 reason= " << reason;
				return;
			}

			//把拿到的数据，设置到DataCenter中
			dataCenter->resetRecentMessageList(chatSessionId, pbResp);

			//发送信号，告知界面进行更新
			if (updateUI) {
				emit dataCenter->getRecentMessageListDone(chatSessionId);
			}
			else {
				emit dataCenter->getRecentMessageListDoneNoUI(chatSessionId);
			}
			});
	}

	//此处的extraInfo，可以用来传递扩展信息，尤其是对文件消息来说，通过这个字段表示“文件名”
	//其他类型的消息暂时不涉及，就直接设置为空，如果后续有消息类型需要，都可以给这个参数，赋予一定的特殊意义
	void NetClient::sendMessage(const QString& loginSessionId, const QString& chatSessionId, 
		model::MessageType messageType, const QByteArray& content, const QString& extraInfo)
	{
		//通过protobuf 构造 body
		bite_im::NewMessageReq req;
		req.setRequestId(makeRequestId());
		req.setSessionId(loginSessionId);
		req.setChatSessionId(chatSessionId);

		//构造MessageContent
		bite_im::MessageContent messageContent;
		if (messageType == MessageType::TEXT_TYPE) {
			messageContent.setMessageType(bite_im::MessageTypeGadget::MessageType::STRING);

			bite_im::StringMessageInfo stringMessageInfo;
			stringMessageInfo.setContent(content);
			messageContent.setStringMessage(stringMessageInfo);
		}
		else if (messageType == MessageType::IMAGE_TYPE) {
			messageContent.setMessageType(bite_im::MessageTypeGadget::MessageType::IMAGE);

			bite_im::ImageMessageInfo imageMessageInfo;
			imageMessageInfo.setFileId("");
			imageMessageInfo.setImageContent(content);
			messageContent.setImageMessage(imageMessageInfo);
		}
		else if (messageType == MessageType::FILE_TYPE) {
			messageContent.setMessageType(bite_im::MessageTypeGadget::MessageType::FILE);

			bite_im::FileMessageInfo fileMessageInfo;
			fileMessageInfo.setFileId("");
			fileMessageInfo.setFileSize(content.size());
			fileMessageInfo.setFileName(extraInfo);
			fileMessageInfo.setFileContents(content);
			messageContent.setFileMessage(fileMessageInfo);
		}
		else if (messageType == MessageType::SPEECH_TYPE) {
			messageContent.setMessageType(bite_im::MessageTypeGadget::MessageType::SPEECH);

			bite_im::SpeechMessageInfo speechMessageInfo;
			speechMessageInfo.setFileId("");
			speechMessageInfo.setFileContents(content);
			messageContent.setSpeechMessage(speechMessageInfo);
		}
		else {
			LOG() << "错误的消息类型 messageType= " << messageType;
		}
		req.setMessage(messageContent);

		//序列化操作
		QByteArray body = req.serialize(&serializer);
		LOG() << "发送消息->发送请求 requestId= " << req.requestId() << ", loginSessionId=" << req.sessionId() <<
			", chatSessionId= " << req.chatSessionId() << ", messageType=" << req.message().messageType(); 
		
		//发送HTTP请求
		QNetworkReply* resp = this->sendHttpRequest("/service/message_transmit/new_message", body);

		//处理HTTP响应
		connect(resp, &QNetworkReply::finished, this, [=]() {
			//针对响应结果，进行解析
			bool ok = false;
			QString reason;
			auto pbResp = this->handleHttpResponse<bite_im::NewMessageRsp>(resp, &ok, &reason);

			//判定响应是否正确
			if (!ok) {
				LOG() << "发送消息->处理出错 reason= " << reason;
				return;
			}

			//此处只是记录成功和失败，不需要把内写入到DataCenter中


			//通知调用者，响应处理完毕
			emit dataCenter->sendMessageDone(messageType, content, extraInfo);

			//打印日志
			LOG() << "发送消息->响应处理完毕 requestId=" << pbResp->requestId();
			});
	}

	void NetClient::receiveMessage(const QString& chatSessionId)
	{
		//要先判定一下，这个收到消息对应的会话是否是正在被用户选中的“当前会话”
		//当前会话，就需要把消息显示到消息展示区，也需要更新会话列表消息预览
		//若不是，只更新消息预览，并且更新“未读消息数目”
		if (chatSessionId == dataCenter->getCurrentSessionId()) {
			//说明是选中的会话
			const Message& lastMessage = dataCenter->getRecentMessageList(chatSessionId)->back();
			//通过信号，让NetClient模块能够通知界面
			emit dataCenter->receiveMessageDone(lastMessage);
		}
		else {
			//说明不是 
			dataCenter->addUnread(chatSessionId);
		}
		//统一更新会话列表的消息预览
		emit dataCenter->updateLastMessage(chatSessionId);
	}
} //end namespace network