#include "stdafx.h"

ToxHexAddress ResolveToxAddressFromDnsRecordV1(const std::string &dnsRecord)
{
	std::smatch match;
	std::regex regex("^v=tox1;id=([A-Fa-f0-9]{76})(;sign=(\\S+))?$");
	if (std::regex_search(dnsRecord, match, regex))
		return ToxHexAddress(match[1]);
	return ToxHexAddress::Empty();
}

ToxHexAddress ResolveToxAddressFromDnsRecordV2(const std::string &/*dnsRecord*/)
{
	// unsupported
	/*std::smatch match;
	std::regex regex("^v=tox2;pub=([A-Fa-f0-9]{64});check=([A-Fa-f0-9]{8});sign=(\\S+))?$");
	if (std::regex_search(dnsRecord, match, regex))
	{
	}*/
	return ToxHexAddress::Empty();
}

ToxHexAddress ResolveToxAddressFromDnsRecordV3(void *dns, uint32_t requestId, const std::string &dnsRecord)
{
	std::smatch match;
	std::regex regex("^v=tox3;id=([a-z0-5.]+)$");
	if (std::regex_search(dnsRecord, match, regex))
	{
		std::string id = match[1];
		uint8_t data[TOX_ADDRESS_SIZE];
		if (tox_decrypt_dns3_TXT(dns, data, (uint8_t*)id.c_str(), (uint32_t)id.length(), requestId) != TOX_ERROR)
		{
			return ToxHexAddress(data, TOX_ADDRESS_SIZE);
		}
	}
	return ToxHexAddress::Empty();
}

ToxHexAddress ResolveToxAddressFromDns(const char *dnsQuery)
{
	ToxHexAddress address = ToxHexAddress::Empty();

	DNS_RECORDA *record = NULL;
	DNS_STATUS status = DnsQuery_A(dnsQuery, DNS_TYPE_TEXT, DNS_QUERY_STANDARD, NULL, (PDNS_RECORD*)&record, NULL);
	while (status == ERROR_SUCCESS && record)
	{
		DNS_TXT_DATAA *txt = &record->Data.Txt;
		if (record->wType == DNS_TYPE_TEXT && txt->dwStringCount)
		{
			address = ResolveToxAddressFromDnsRecordV1(txt->pStringArray[0]);
			break;
		}
		record = record->pNext;
	}
	DnsRecordListFree((PDNS_RECORD*)record, DnsFreeRecordList);

	return address;
}

void CToxProto::SearchByNameAsync(void *arg)
{
	char *query = (char*)arg;
	char *name = strtok(query, "@");
	char *domain = strtok(NULL, "");

	int resolved = 0;

	if (IsFileExists((TCHAR*)VARST(_T(TOX_INI_PATH))))
	{
		char fileName[MAX_PATH];
		mir_strcpy(fileName, VARS(TOX_INI_PATH));

		char *section, sections[MAX_PATH], value[TOX_PUBLIC_KEY_SIZE * 2];
		GetPrivateProfileSectionNamesA(sections, _countof(sections), fileName);
		section = sections;
		while (*section != NULL)
		{
			if (strstr(section, "Dns_") == section)
			{
				GetPrivateProfileStringA(section, "Domain", NULL, value, _countof(value), fileName);
				ptrA dnsDomain(mir_strdup(value));
				GetPrivateProfileStringA(section, "PubKey", NULL, value, _countof(value), fileName);
				ToxBinAddress dnsPubKey = value;

				if (domain == NULL || mir_strcmpi(domain, dnsDomain) == 0)
				{
					void *dns = tox_dns3_new((uint8_t*)(const uint8_t*)dnsPubKey);

					uint32_t requestId = 0;
					uint8_t dnsString[MAX_PATH];
					size_t length = tox_generate_dns3_string(dns, dnsString, sizeof(dnsString), &requestId, (uint8_t*)CharLowerA(name), (uint8_t)mir_strlen(name));
					if (length != TOX_ERROR)
					{
						dnsString[length] = 0;
						char dnsQuery[MAX_PATH * 2];
						mir_snprintf(dnsQuery, "_%s._tox.%s", dnsString, dnsDomain);

						ToxHexAddress address = ResolveToxAddressFromDns(dnsQuery);
						if (!address.IsEmpty())
						{
							PROTOSEARCHRESULT psr = { sizeof(PROTOSEARCHRESULT) };
							psr.flags = PSR_UTF8;
							psr.id.a = mir_strdup(address);
							psr.nick.a = mir_strdup(name);

							char email[MAX_PATH];
							mir_snprintf(email, "%s@%s", name, domain);
							psr.email.a = mir_strdup(email);

							ProtoBroadcastAck(NULL, ACKTYPE_SEARCH, ACKRESULT_DATA, (HANDLE)1, (LPARAM)&psr);
							break;
						}
					}
					tox_dns3_kill(dns);
				}
			}
			section += mir_strlen(section) + 1;
		}
	}

	if (resolved == 0 && domain)
	{
		char dnsQuery[MAX_PATH];
		mir_snprintf(dnsQuery, "%s._tox.%s", name, domain);

		ToxHexAddress address = ResolveToxAddressFromDns(dnsQuery);
		if (!address.IsEmpty())
		{
			PROTOSEARCHRESULT psr = { sizeof(PROTOSEARCHRESULT) };
			psr.flags = PSR_UTF8;
			psr.id.a = mir_strdup(address);
			psr.nick.a = mir_strdup(name);

			char email[MAX_PATH];
			mir_snprintf(email, "%s@%s", name, domain);
			psr.email.a = mir_strdup(email);

			ProtoBroadcastAck(NULL, ACKTYPE_SEARCH, ACKRESULT_DATA, (HANDLE)1, (LPARAM)&psr);
		}
	}

	ProtoBroadcastAck(NULL, ACKTYPE_SEARCH, ACKRESULT_SUCCESS, (HANDLE)1, 0);
	mir_free(arg);
}

void CToxProto::SearchFailedAsync(void*)
{
	ProtoBroadcastAck(NULL, ACKTYPE_SEARCH, ACKRESULT_FAILED, (HWND)1, 0);
}

INT_PTR CToxProto::SearchDlgProc(HWND hwnd, UINT uMsg, WPARAM, LPARAM lParam)
{
	CToxProto *proto = (CToxProto*)GetWindowLongPtr(hwnd, GWLP_USERDATA);

	switch (uMsg)
	{
	case WM_INITDIALOG:
		TranslateDialogDefault(hwnd);
		{
			proto = (CToxProto*)lParam;
			SetWindowLongPtr(hwnd, GWLP_USERDATA, lParam);

			//ShowWindow(GetDlgItem(GetParent(hwnd), 1408/*IDC_BYCUSTOM*/), SW_HIDE);
			//ShowWindow(GetDlgItem(GetParent(hwnd), 1402/*IDC_ADVANCEDGROUP*/), SW_HIDE);
			SetDlgItemText(GetParent(hwnd), 1408/*IDC_BYCUSTOM*/, TranslateT("Query"));
		}
		return TRUE;
	}

	return FALSE;
}

HWND CToxProto::OnSearchAdvanced(HWND owner)
{
	if (!IsOnline())
	{
		// we cannot add someone to friend list while tox is offline
		return NULL;
	}

	std::smatch match;
	std::regex regex("^\\s*([A-Fa-f0-9]{76})\\s*$");

	TCHAR text[MAX_PATH];
	GetDlgItemText(owner, IDC_SEARCH, text, _countof(text));

	const std::string query = T2Utf(text).str();
	if (std::regex_search(query, match, regex))
	{
		std::string address = match[1];

		PROTOSEARCHRESULT psr = { sizeof(psr) };
		psr.id.a = mir_strdup(query.c_str());

		ADDCONTACTSTRUCT acs = { HANDLE_SEARCHRESULT };
		acs.szProto = m_szModuleName;
		acs.psr = &psr;

		CallService(MS_ADDCONTACT_SHOW, (WPARAM)owner, (LPARAM)&acs);

		ForkThread(&CToxProto::SearchFailedAsync, NULL);
	}
	else
	{
		regex = "^\\s*(([^ @/:;()\"']+)(@[A-Za-z]+.[A-Za-z]{2,6})?)\\s*$";
		if (std::regex_search(query, match, regex))
			ForkThread(&CToxProto::SearchByNameAsync, mir_strdup(query.c_str()));
		else
			ForkThread(&CToxProto::SearchFailedAsync, NULL);
	}
	return (HWND)1;
}

HWND CToxProto::OnCreateExtendedSearchUI(HWND owner)
{
	return CreateDialogParam(
		g_hInstance,
		MAKEINTRESOURCE(IDD_SEARCH),
		owner,
		SearchDlgProc,
		(LPARAM)this);
}