#include "WsUser.h"
#include "WebServer.h"
#include "MsgLoop.h"
#include "Manager.h"
#include "../../base/HGInfo.h"
#include "sha1.h"
#include "base64.h"

#if defined(HG_CMP_MSC)
WsUser::WsUser(class WebServer *server, HGUInt id, const char *ip, uint16_t port, SOCKET sockConn)
#else
WsUser::WsUser(class WebServer *server, HGUInt id, const char *ip, uint16_t port, int sockConn)
#endif
	: WebUser(server, id, ip, port, sockConn)
{

}

WsUser::~WsUser()
{

}

void WsUser::HandleCmd(const WsCmdParam* param)
{
	// 解析param->data
	// 处理
	// SendResponse
}

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
				WebMsg msg;
				msg.msgId = WEB_MSGID_DISCONNET;
				msg.svrId = m_server->GetId();
				msg.usrId = m_id;
				msg.param = NULL;
				GetLoop()->Send(&msg);
				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)
				{
					WebMsg msg;
					msg.msgId = WEB_MSGID_DISCONNET;
					msg.svrId = m_server->GetId();
					msg.usrId = m_id;
					msg.param = NULL;
					GetLoop()->Send(&msg);
					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
					{
						WebMsg msg;
						msg.msgId = WEB_MSGID_DISCONNET;
						msg.svrId = m_server->GetId();
						msg.usrId = m_id;
						msg.param = NULL;
						GetLoop()->Send(&msg);
						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
					{
						WebMsg msg;
						msg.msgId = WEB_MSGID_DISCONNET;
						msg.svrId = m_server->GetId();
						msg.usrId = m_id;
						msg.param = NULL;
						GetLoop()->Send(&msg);
						break;
					}
				}
				else if (2 == nHeadDataLen)
				{
					if (0 == (headData[1] & 0x80)) // 必须经过掩码处理
					{
						WebMsg msg;
						msg.msgId = WEB_MSGID_DISCONNET;
						msg.svrId = m_server->GetId();
						msg.usrId = m_id;
						msg.param = NULL;
						GetLoop()->Send(&msg);
						break;
					}

					if ((0x80 | 0x09) == headData[0]) // PING帧
					{
						if (0x80 != headData[1])
						{
							WebMsg msg;
							msg.msgId = WEB_MSGID_DISCONNET;
							msg.svrId = m_server->GetId();
							msg.usrId = m_id;
							msg.param = NULL;
							GetLoop()->Send(&msg);
							break;
						}
					}
					else if ((0x80 | 0x0A) == headData[0]) // PONG帧
					{
						if (0x80 != headData[1])
						{
							WebMsg msg;
							msg.msgId = WEB_MSGID_DISCONNET;
							msg.svrId = m_server->GetId();
							msg.usrId = m_id;
							msg.param = NULL;
							GetLoop()->Send(&msg);
							break;
						}
					}
					else
					{
						if ((headData[1] & 0x7F) <= 125)
						{
							uint32_t nCmdSize = (headData[1] & 0x7F);
							nHeadDataLen = 0;

							if (0 == nCmdSize)
							{
								WebMsg msg;
								msg.msgId = WEB_MSGID_DISCONNET;
								msg.svrId = m_server->GetId();
								msg.usrId = m_id;
								msg.param = NULL;
								GetLoop()->Send(&msg);
								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)
							{
								WebMsg msg;
								msg.msgId = WEB_MSGID_DISCONNET;
								msg.svrId = m_server->GetId();
								msg.usrId = m_id;
								msg.param = NULL;
								GetLoop()->Send(&msg);
								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))
						{
							WebMsg msg;
							msg.msgId = WEB_MSGID_DISCONNET;
							msg.svrId = m_server->GetId();
							msg.usrId = m_id;
							msg.param = NULL;
							GetLoop()->Send(&msg);
							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)
						{
							WsCmdParam *param = new WsCmdParam;
							param->data = new HGByte [vAllData.size()];
							param->size = (HGUInt)vAllData.size();
							memcpy(param->data, &vAllData[0], vAllData.size());

							WebMsg msg;
							msg.msgId = WEB_MSGID_WSCMD;
							msg.svrId = m_server->GetId();
							msg.usrId = m_id;
							msg.param = param;
							bool b = GetLoop()->Send(&msg);
							if (!b)
							{
								delete[] param->data;
								param->size = 0;
								delete param;
							}

							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;
}