#include "WSUser.h"
#include "WSServer.h"
#include "ManagerV2.h"
#include "base/HGInfo.h"
#include "cJSON.h"
#include "sha1.h"
#include "base64.h"

namespace ver_2
{
	static int GetJsonIntValue(cJSON* json, const std::string& key)
	{
		int ret = 0;

		cJSON* p = json->child;
		while (NULL != p)
		{
			if (0 == strcmp(p->string, key.c_str()))
			{
				if (p->type == cJSON_Number)
					ret = p->valueint;
				break;
			}

			p = p->next;
		}

		return ret;
	}

	static bool GetJsonBoolValue(cJSON* json, const std::string& key)
	{
		bool ret = false;

		cJSON* p = json->child;
		while (NULL != p)
		{
			if (0 == strcmp(p->string, key.c_str()))
			{
				if (p->type == cJSON_True)
					ret = true;
				break;
			}

			p = p->next;
		}

		return ret;
	}

	static std::string GetJsonStringValue(cJSON* json, const std::string& key)
	{
		std::string ret;

		cJSON* p = json->child;
		while (NULL != p)
		{
			if (0 == strcmp(p->string, key.c_str()))
			{
				if (p->type == cJSON_String)
					ret = p->valuestring;
				break;
			}

			p = p->next;
		}

		return ret;
	}

#if defined(HG_CMP_MSC)
	WSUser::WSUser(WebServer* server, HGUInt id, const std::string& ip, uint16_t port, SOCKET sockConn)
#else
	WSUser::WSUser(WebServer* server, HGUInt id, const std::string& ip, uint16_t port, int sockConn)
#endif
		: WebUser(server, id, ip, port, sockConn)
	{

	}

	WSUser::~WSUser()
	{

	}

	ManagerV2* WSUser::GetManager()
	{
		return ((WSServer*)m_server)->GetManger();
	}

	void WSUser::HandleCmd(const WSCmdParam* param)
	{
		assert(NULL != param && m_id == param->usrId);

		std::string cmdData((const char*)param->data, param->size);
		cJSON* json = cJSON_Parse(cmdData.c_str());
		if (NULL != json)
		{
			std::string func = GetJsonStringValue(json, "func");
			if ("set_global_config" == func)
			{

			}
			else if ("get_global_config" == func)
			{

			}
			else if ("load_local_image" == func)
			{

			}

			cJSON_Delete(json);
		}
	}

	void WSUser::HandleEvent(const WSEvtParam* param)
	{
		assert(NULL != param && m_id == param->usrId);

		SendResponse(param->data, param->size, HGTRUE);
	}

	void WSUser::PostCmdMsg(const HGByte* data, HGUInt dataSize)
	{
		WSCmdParam* param = new WSCmdParam;
		param->svr = (WSServer*)m_server;
		param->usrId = m_id;
		param->data = new HGByte[dataSize];
		param->size = dataSize;
		memcpy(param->data, data, dataSize);

		HGMsg msg;
		msg.id = MSGID_WS_COMMAND;
		msg.data = param;
		if (HGBASE_ERR_OK != HGBase_PostPumpMessage(m_server->GetMsgPump(), &msg))
		{
			delete[] param->data;
			param->size = 0;
			delete param;
		}
	}

	void WSUser::PostEventMsg(const HGByte* data, HGUInt dataSize)
	{
		WSEvtParam* param = new WSEvtParam;
		param->svr = (WSServer*)m_server;
		param->usrId = m_id;
		param->data = new HGByte[dataSize];
		param->size = dataSize;
		memcpy(param->data, data, dataSize);

		HGMsg msg;
		msg.id = MSGID_WS_EVENT;
		msg.data = param;
		if (HGBASE_ERR_OK != HGBase_PostPumpMessage(m_server->GetMsgPump(), &msg))
		{
			delete[] param->data;
			param->size = 0;
			delete param;
		}
	}

	void WSUser::ThreadFunc()
	{
		HGBase_WriteInfo(HGBASE_INFOTYPE_DESC, "WSUser::ThreadFunc");

		char chBuffer[2048];
		const char* pBuffer = chBuffer;
		int nBufferSize = 0;
		bool bConnect = false;

		unsigned char connectDataTail[4] = { '\r', '\n', '\r', '\n' };
		unsigned int connectDataTailLen = 0;
		std::string connectData;

		uint8_t* pData = NULL;
		int nDataSize = 0;
		uint8_t* pDataEx = NULL;
		int nRemainSize = 0;
		uint8_t headData[20];
		uint32_t nHeadDataLen = 0;
		uint8_t vMask[4];
		uint32_t nMaskCount = 0;
		bool bHandle = false;
		std::vector<uint8_t> vAllData;

		while (1)
		{
			if (0 == nBufferSize)
			{
				int len = recv(m_sockConn, chBuffer, 2048, 0);
				if (len <= 0)
				{
					// 这里跳出，可能是服务器关闭了socketConn，或者客户端关闭了socket，或者网络断开
					PostDisConnectMsg();
					break;
				}
				else
				{
					pBuffer = chBuffer;
					nBufferSize = len;
				}
			}

			assert(nBufferSize > 0);

			if (!bConnect)
			{
				unsigned char b = *pBuffer;
				++pBuffer;
				--nBufferSize;

				connectData.push_back(b);
				if (b == connectDataTail[connectDataTailLen])
				{
					++connectDataTailLen;
				}
				else
				{
					connectDataTailLen = 0;
					if (b == connectDataTail[connectDataTailLen])
					{
						++connectDataTailLen;
					}
				}

				if (4 == connectDataTailLen)
				{
					connectDataTailLen = 0;
					bool shakeRet = ShakeHand(connectData);
					connectData.clear();

					if (!shakeRet)
					{
						PostDisConnectMsg();
						break;
					}

					bConnect = true;
				}
			}
			else
			{
				if (NULL == pData)
				{
					assert(0 == nDataSize);

					uint8_t b = *pBuffer;
					++pBuffer;
					--nBufferSize;
					headData[nHeadDataLen] = b;
					++nHeadDataLen;

					if (1 == nHeadDataLen)
					{
						if ((0x80 | 0x08) == headData[0]) // 断开连接
						{
							PostDisConnectMsg();
							break;
						}
						else if ((0x80 | 0x09) == headData[0]) // PING帧
						{
							//
						}
						else if ((0x80 | 0x0A) == headData[0]) // PONG帧
						{
							//
						}
						else if ((0x00 | 0x01) == headData[0] || (0x00 | 0x02) == headData[0] || (0x00 | 0x00) == headData[0] || (0x80 | 0x00) == headData[0]
							|| (0x80 | 0x01) == headData[0] || (0x80 | 0x02) == headData[0]) // 数据帧
						{
							if ((0x80 | 0x00) == headData[0] || (0x80 | 0x01) == headData[0] || (0x80 | 0x02) == headData[0])
							{
								// 分片结束
								bHandle = true;
							}
							else
							{
								// 分片帧
								bHandle = false;
							}
						}
						else // 帧错误，断开连接
						{
							PostDisConnectMsg();
							break;
						}
					}
					else if (2 == nHeadDataLen)
					{
						if (0 == (headData[1] & 0x80)) // 必须经过掩码处理
						{
							PostDisConnectMsg();
							break;
						}

						if ((0x80 | 0x09) == headData[0]) // PING帧
						{
							if (0x80 != headData[1])
							{
								PostDisConnectMsg();
								break;
							}
						}
						else if ((0x80 | 0x0A) == headData[0]) // PONG帧
						{
							if (0x80 != headData[1])
							{
								PostDisConnectMsg();
								break;
							}
						}
						else
						{
							if ((headData[1] & 0x7F) <= 125)
							{
								uint32_t nCmdSize = (headData[1] & 0x7F);
								nHeadDataLen = 0;

								if (0 == nCmdSize)
								{
									PostDisConnectMsg();
									break;
								}

								nDataSize = nCmdSize;
								nRemainSize = nCmdSize;
								pData = new uint8_t[nDataSize];
								pDataEx = pData;
							}
						}
					}
					else if (4 == nHeadDataLen)
					{
						if ((0x80 | 0x09) == headData[0]) // PING帧
						{
							//
						}
						else if ((0x80 | 0x0A) == headData[0]) // PONG帧
						{
							//
						}
						else
						{
							if ((headData[1] & 0x7F) == 126)
							{
								uint32_t nCmdSize = ntohs(*(uint16_t*)&headData[2]);
								nHeadDataLen = 0;

								if (0 == nCmdSize)
								{
									PostDisConnectMsg();
									break;
								}

								nDataSize = nCmdSize;
								nRemainSize = nCmdSize;
								pData = new uint8_t[nDataSize];
								pDataEx = pData;
							}
						}
					}
					else if (6 == nHeadDataLen)
					{
						if ((0x80 | 0x09) == headData[0]) // PING帧
						{
							nHeadDataLen = 0;

							Pong();
						}
						else if ((0x80 | 0x0A) == headData[0]) // PONG帧
						{
							nHeadDataLen = 0;
						}
					}
					else if (10 == nHeadDataLen)
					{
						if ((headData[1] & 0x7F) == 127) // 这里一定会等于127
						{
							uint32_t nCmdSizeHigh = ntohl(*(uint32_t*)&headData[2]);
							uint32_t nCmdSize = ntohl(*(uint32_t*)&headData[6]);
							nHeadDataLen = 0;

							if ((0 != nCmdSizeHigh) || (0 == nCmdSize))
							{
								PostDisConnectMsg();
								break;
							}

							nDataSize = nCmdSize;
							nRemainSize = nCmdSize;
							pData = new uint8_t[nDataSize];
							pDataEx = pData;
						}
					}
				}
				else
				{
					if (4 != nMaskCount)
					{
						uint8_t b = *pBuffer;
						++pBuffer;
						--nBufferSize;
						vMask[nMaskCount] = b;
						++nMaskCount;
					}
					else
					{
						int nWriteSize = HGMIN(nBufferSize, nRemainSize);
						memcpy(pDataEx, pBuffer, nWriteSize);
						pBuffer += nWriteSize;
						nBufferSize -= nWriteSize;
						pDataEx += nWriteSize;
						nRemainSize -= nWriteSize;

						if (0 == nRemainSize)
						{
							assert(pDataEx == pData + nDataSize);

							for (int i = 0; i < nDataSize; ++i)
							{
								int j = i % 4;
								pData[i] = pData[i] ^ vMask[j];
								vAllData.push_back(pData[i]);
							}

							delete[] pData;
							pData = NULL;
							nDataSize = 0;
							nMaskCount = 0;

							if (bHandle)
							{
								PostCmdMsg(&vAllData[0], (HGUInt)vAllData.size());

								bHandle = false;
								vAllData.clear();
							}
						}
					}
				}
			}
		}

		if (NULL != pData)
		{
			delete[] pData;
			pData = NULL;
			nDataSize = 0;
			nMaskCount = 0;
		}
	}

	bool WSUser::ShakeHand(const std::string& head)
	{
		std::string requestMethod;
		std::string requestURIPath;
		HttpPairs requestURIQueryInfos;
		std::string requestURIFragment;
		std::string httpVersion;
		HttpPairs headInfos;
		HttpHead::AnalysisHead(head, requestMethod, requestURIPath, requestURIQueryInfos,
			requestURIFragment, httpVersion, headInfos);

		if ("Upgrade" != HttpHead::GetValue(headInfos, "Connection"))
			return false;
		if ("websocket" != HttpHead::GetValue(headInfos, "Upgrade"))
			return false;

		std::string key = HttpHead::GetValue(headInfos, "Sec-WebSocket-Key");
		if (key.empty())
			return false;

		key += "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";

		unsigned int message_digest[5];
		SHA1 sha;
		sha.Reset();
		sha << key.c_str();
		sha.Result(message_digest);

		for (int i = 0; i < 5; ++i)
			message_digest[i] = htonl(message_digest[i]);
		std::string serverKey = base64_encode((const unsigned char*)message_digest, 20);

		std::string handShakeResp = "HTTP/1.1 101 Switching Protocols\r\n";
		handShakeResp += "Upgrade: websocket\r\n";
		handShakeResp += "Connection: Upgrade\r\n";
		handShakeResp += "Sec-WebSocket-Accept:";
		handShakeResp += serverKey;
		handShakeResp += "\r\n\r\n";
		send(m_sockConn, handShakeResp.c_str(), (int)handShakeResp.length(), 0);
		return true;
	}

	void WSUser::Pong()
	{
		uint8_t vHead[2];
		vHead[0] = 0x80 | 0x0A;
		vHead[1] = 0;

		HGBase_EnterLock(m_cs);
		send(m_sockConn, (const char*)vHead, 2, 0);
		HGBase_LeaveLock(m_cs);
	}

	bool WSUser::SendResponse(const HGByte* data, HGUInt size, HGBool text)
	{
		if (NULL == data || 0 == size)
		{
			return false;
		}

		uint32_t nHeadLen = 0;

		uint8_t vHead[20] = { 0 };
		vHead[0] = text ? (0x80 | 0x01) : (0x80 | 0x02);
		if (size <= 125)
		{
			vHead[1] = (uint8_t)size;
			nHeadLen = 2;
		}
		else if (size <= 0xFFFF)
		{
			vHead[1] = 126;
			uint16_t payloadLength16b = htons((uint16_t)size);
			memcpy(&vHead[2], &payloadLength16b, 2);
			nHeadLen = 4;
		}
		else
		{
			vHead[1] = 127;
			vHead[2] = 0;
			vHead[3] = 0;
			vHead[4] = 0;
			vHead[5] = 0;
			uint32_t payloadLength32b = htonl(size);
			memcpy(&vHead[6], &payloadLength32b, 4);
			nHeadLen = 10;
		}

		HGBase_EnterLock(m_cs);
		send(m_sockConn, (const char*)vHead, nHeadLen, 0);
		send(m_sockConn, (const char*)data, size, 0);
		HGBase_LeaveLock(m_cs);
		return true;
	}
}