// CalDAV.h - CalDAV Connection Object header.
//
// (c) 2016-2017 Xestia Software Development.
//
// This file is part of Xestia Calendar.
//
// Xestia Calendar is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by the
// Free Software Foundation, version 3 of the license.
//
// Xestia Calendar is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with Xestia Calendar. If not, see <http://www.gnu.org/licenses/>

#ifndef __OBJECTS_CALDAV_CALDAV_H__
#define __OBJECTS_CALDAV_CALDAV_H__

#include <curl/curl.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <string>
#include <iostream>
#include <vector>
#include <stdexcept>
#include <map>
#include "../../common/colour.h"
#include "../../common/text.h"
#include "../../common/uuid.h"

using namespace std;

// CalDAVConnectionData: used for
// connecting to the server.

enum CalDAVQueryResult {
	CALDAVQUERYRESULT_UNITTESTFAIL = -1,
	CALDAVQUERYRESULT_OK,
	CALDAVQUERYRESULT_NOTRUN,
	CALDAVQUERYRESULT_SERVERERROR
};

struct CalDAVCalendarList {

	map<int,string> Name;
	map<int,string> HREF;
	map<int,int> Order;
	map<int,string> Description;
	map<int,Colour> CalColour;
	map<int,string> Tag;
	map<int,string> TagURL;
	
};

struct CalDAVEntryList {
	
	map<int,string> HREF;
	map<int,string> Data;
	map<int,string> Tag;
	
};

struct CalDAVConnectionData{
	
	string Hostname = "";
	int Port = 8008;
	string Username = "";
	string Password = "";
	string Prefix = "";
	bool UseSSL = true;
	int Timeout = 60;
	
};

// CalDAVStatusData: used for
// getting the current server
// settings for the CalDAV
// object.

struct CalDAVStatus{

	string Hostname;
	int Port;
	string Username;
	string Prefix;
	bool UseSSL;	
	int Timeout;

};

// CalDAVServerSupport: used for
// getting what the server supports
// from the CalDAV specification.

struct CalDAVServerSupport{
	
	// Variable name.			   Name in CalDAV header.
	
	bool BasicSupport = false;		// calendar-access
	
};

// CalDAVServerResult: used for
// getting the result of the
// request made via the CalDAV
// object.

struct CalDAVServerResult{

	CalDAVQueryResult Result = CALDAVQUERYRESULT_NOTRUN;
	CURLcode Code = CURLE_OK;
	long HTTPCode = 0;
	
};

// CalDAVSendData: used for
// sending data to the CaLDAV
// server.

struct CalDAVSendData{
	string *readptr;
	long sizeleft;
	int seek = 0;
};

class CalDAV{

	private:
		string ProcessXMLUserPrincipal();
		string ProcessXMLCalendarHome();
		CalDAVCalendarList ProcessXMLCalendarList();
		CalDAVEntryList ProcessXMLEntryList();
		CalDAVEntryList ProcessXMLSyncTokenList();
		string ProcessXMLEntryETag();
		bool MatchXMLNameTransverse(xmlNodePtr *NodePtr, string NodeName);
		bool MatchXMLName(xmlNodePtr *NodePtrOriginal, string NodeName);
		string FetchXMLData(xmlNodePtr *NodePtr);
		CalDAVServerResult EditCalendarProcess(string *CalendarHREF,
			string *CalendarName,
			Colour *CalendarColour,
			string *CalendarDescription,
			int *CalendarOrder);
	
		CalDAVConnectionData ConnectionData;
		CalDAVServerResult ConnectionServerResult;
		CURL *ConnectionHandle = nullptr;
		string ServerData = "";
		string ServerHeader = "";
	
	public:
		CalDAV();
		~CalDAV();
		void SetupConnectionData(CalDAVConnectionData *ConnData);
		CalDAVStatus GetConnectionData();
		CalDAVServerResult Connect();
		CalDAVServerResult GetServerResult();
		CalDAVServerSupport GetServerSupport();
		CalDAVCalendarList GetCalendars();
		CalDAVEntryList GetEntryList(string *CalendarHREF);
		CalDAVEntryList GetEntryList(string *CalendarHREF, string *CalendarTag);
	
		CalDAVServerResult AddCalendar(string CalendarName);
		CalDAVServerResult AddCalendar(string *CalendarName, string *CalendarShortName);
	
		CalDAVServerResult EditCalendar(string *CalendarHREF,
			string *CalendarName,
			Colour *CalendarColour,
			string *CalendarDescription,
			int *CalendarOrder);
		CalDAVServerResult EditCalendar(string *CalendarHREF,
			Colour *CalendarColour);
		CalDAVServerResult EditCalendar(string *CalendarHREF,
			string *CalendarName);
		CalDAVServerResult EditCalendar(string *CalendarHREF,
			int *CalendarOrder);
		CalDAVServerResult EditCalendarDescription(string *CalendarHREF,
			string *CalendarDescription);
		
		CalDAVServerResult DeleteCalendar(string *CalendarHREF);
		
		CalDAVServerResult AddEntry(string *CalendarEntryHREF, string *EntryData);
		CalDAVServerResult EditEntry(string *CalendarEntryHREF, string *EntryData, string *EntryETag);
		CalDAVServerResult DeleteEntry(string *CalendarEntryHREF);
	
		string GetUserPrincipal();
		string GetCalendarHome(string UserPrincipalURI);
		
		CalDAVServerResult GetEntryETag(string *CalendarEntryHREF, string *ETagValue);
	
};

// Subroutines that are used with the 
// CalDAVConnectionData struct.

bool CalDAVObjectValidSettings(CalDAVConnectionData *ConnData);
string BuildServerAddress(CalDAVConnectionData *ConnData, string URIAddress);

#endif