// 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