/*
 * This file is a part of Winix
 * and is not publicly distributed
 *
 * Copyright (c) 2012-2014, Tomasz Sowa
 * All rights reserved.
 *
 */

#ifndef headerfile_winix_core_timezones
#define headerfile_winix_core_timezones

#include <string>
#include <vector>
#include "timezone.h"
#include "space/spaceparser.h"


namespace Winix
{




class TimeZones
{
public:

	TimeZones();

	// maximum allowed time zone's identifier
	void SetTimeZoneMaxId(size_t max_id);

	// reading time zone from a file
	bool ReadTimeZones(const wchar_t * path);
	bool ReadTimeZones(const std::wstring & path);

	// returning true if there is a time zone with the zone_id identifier
	bool HasZone(size_t zone_id);

	// returning a time zone by time zone's identifier
	// can return a null pointer if there is no such a zone
	TimeZone * GetZone(size_t zone_id);

	// returning the number of all time zones
	size_t Size() const;

	// returning a time zone by an internal index
	// usuful for iterating through all zones
	// this index is in a range of <0, Size()-1>
	// can return a null pointer if the index is out of range
	TimeZone * GetZoneByIndex(size_t zone_index);

	// return true if there are not any time zones
	bool Empty() const;

	// clears all time zones
	// this does not affect SetTimeZoneMaxId()
	// so the size of zone_indices is not changed but all indices are invalidated
	void Clear();


private:

	// indices to 'tab'
	// with this we have O(1) time to find a time zone in 'tab'
	// everywhere we use zone_id we refer to this table
	// SetTimeZoneMaxId(size_t max_id) sets size of this table to max_id+1
	std::vector<size_t> zone_indices;

	// time zones
	// everywhere we use zone_index we refer to this table
	std::vector<TimeZone> zone_tab;

	PT::SpaceParser parser;
	PT::Space temp_space;
	TimeZone temp_zone;

	void ParseZones();

};



} // namespace Winix



#endif