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

#include "timezones.h"
#include "misc.h"
#include "log.h"



TimeZones::TimeZones()
{
	Clear();
}


time_t TimeZones::ParseOffset(const wchar_t * str)
{
PT::Date date;
bool is_sign = false;
time_t offset = 0;

	str = SkipWhite(str);

	if( *str == '-' )
	{
		is_sign = true;
		str += 1;
	}
	else
	if( *str == '+' )
	{
		str += 1;
	}

	if( date.ParseTime(str) )
	{
		offset = date.hour * 60 * 60 + date.min * 60;

		if( is_sign )
			offset = -offset;
	}

return offset;
}


void TimeZones::ParseZones()
{
	for(size_t i=0 ; i<temp_space.spaces.size() ; ++i)
	{
		PT::Space & zone = *temp_space.spaces[i];
		zone.Add(L"tz_offset", 		ParseOffset(zone.Text(L"tz_offset_str").c_str()));
		zone.Add(L"tz_dst_offset", 	ParseOffset(zone.Text(L"tz_dst_offset_str").c_str()));

		temp_zone.Clear();

		if( temp_zone.time_zone.SetTz(zone) )
		{
			temp_zone.name_key = zone.name;

			if( !FindZone(temp_zone.time_zone.tz_id) )
			{
				tab.push_back(temp_zone);
			}
			else
			{
				log << log1 << "Tz: zone with id: " << temp_zone.time_zone.tz_id
					<< " already exists (skipping)" << logend;
			}
		}
		else
		{
			log << log1 << "System: problem with reading info from time zone: "
				<< zone.name << " (skipping) " << logend;
		}
	}
}



// !! IMPROVE ME
// in the future we do not have to read the whole file
// just space by space (not implemented in Space at the moment)
bool TimeZones::ReadTimeZones(const wchar_t * path)
{
	parser.UTF8(true);
	parser.SetSpace(temp_space);
	tab.clear();

	PT::SpaceParser::Status status = parser.Parse(path);

	if( status == PT::SpaceParser::ok )
	{
		ParseZones();
		log << log2 << "Tz: time zones loaded, there are " << tab.size() << " zones" << logend;
	}
	else
	if( status == PT::SpaceParser::syntax_error )
	{
		log << log1 << "TZ: error in time zone file, line: " << parser.line << logend;
	}
	else
	if( status == PT::SpaceParser::cant_open_file )
	{
		log << log1 << "TZ: I cannot open the time zone file: " << path << logend;
	}

	temp_space.Clear();

return status == PT::SpaceParser::ok;
}



bool TimeZones::ReadTimeZones(const std::wstring & path)
{
	return ReadTimeZones(path.c_str());
}




TimeZones::Zone * TimeZones::FindZone(int tz_id)
{
	for(size_t i=0 ; i<tab.size() ; ++i)
	{
		if( tab[i].time_zone.tz_id == tz_id )
			return &tab[i];
	}

return 0;
}


TimeZones::Zone & TimeZones::operator[](size_t index)
{
	return tab[index];
}


size_t TimeZones::Size() const
{
	return tab.size();
}


bool TimeZones::Empty() const
{
	return tab.empty();
}


void TimeZones::Clear()
{
	tab.clear();
}