/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_shell.hxx"
#include "internal/iso8601_converter.hxx"
#include "internal/utilities.hxx"

#include <sstream>
#include <iomanip>

//-----------------------------------
/* Converts ISO 8601 conform date/time
   represenation to the representation
   conforming to the current locale
*/
std::wstring iso8601_date_to_local_date(const std::wstring& isoDate )
{
    const std::wstring CONST_SPACE(L" ");
	::std::wstring ws8601DateTime(isoDate);

    if ( ws8601DateTime.length() == 19 )
    {
        //fill in the SYSTEMTIME structure;
        std::string asDateTime = WStringToString( ws8601DateTime );
        SYSTEMTIME DateTime;
        DateTime.wYear         = ( unsigned short )strtol( asDateTime.substr( 0, 4 ).c_str(), NULL, 10 );
        DateTime.wMonth        = ( unsigned short )strtol( asDateTime.substr( 5, 2 ).c_str(), NULL, 10 );
        DateTime.wDayOfWeek    =  0;
        DateTime.wDay          = ( unsigned short )strtol( asDateTime.substr( 8, 2 ).c_str(), NULL, 10 );
        DateTime.wHour         = ( unsigned short )strtol( asDateTime.substr( 11,2 ).c_str(), NULL, 10 );
        DateTime.wMinute       = ( unsigned short )strtol( asDateTime.substr( 14,2 ).c_str(), NULL, 10 );
        DateTime.wSecond       = ( unsigned short )strtol( asDateTime.substr( 17,2 ).c_str(), NULL, 10 );
        DateTime.wMilliseconds =  0;

        //get Date info from structure
        WCHAR DateBuffer[ MAX_PATH ];
        int DateSize = GetDateFormatW(
            LOCALE_SYSTEM_DEFAULT,
            0,
            &DateTime,
            NULL,
            DateBuffer,
            MAX_PATH );

        if ( DateSize )
            ws8601DateTime.assign(DateBuffer);
        else 
            ws8601DateTime = StringToWString( asDateTime );

        //get Time info from structure
        WCHAR TimeBuffer[ MAX_PATH ];

        int TimeSize =  GetTimeFormatW(
            LOCALE_SYSTEM_DEFAULT,
            0,
            &DateTime,
            NULL,
            TimeBuffer,
            MAX_PATH );

        if ( TimeSize )
        {
            ws8601DateTime.append(L" ");
            ws8601DateTime.append(TimeBuffer);
        }
        else 
            ws8601DateTime = StringToWString( asDateTime );
    }

    return ws8601DateTime;
}

//------------------------------------
/* Converts ISO 8601 conform duration
   representation to the representation
   conforming to the current locale
   
   Expect format PTnHnMnS according to
   ISO 8601 where n is abitrary number
   of digits
*/

std::wstring iso8601_duration_to_local_duration(const std::wstring& iso8601duration)
{    
    std::wstring days;                
    std::wstring hours;
    std::wstring minutes;
    std::wstring seconds;
    
    std::wstring::const_iterator iter     = iso8601duration.begin();
    std::wstring::const_iterator iter_end = iso8601duration.end();
    
    std::wstring num;    
    
    for (/**/; iter != iter_end; ++iter)
    {
        if (isdigit(*iter))
        {
            num += *iter;
        }
        else
        {
            if (*iter == L'D' || *iter == L'd')
                days = num;                            
            else if (*iter == L'H' || *iter == L'h')            
                hours = num;            
            else if (*iter == L'M' || *iter == L'm')            
                minutes = num;            
            else if (*iter == L'S' || *iter == L's')            
                seconds = num;
            
            num.clear();
        }
    }
    
    if (days.length() > 0)
    {                 
        int h = ((_wtoi(days.c_str()) * 24) + _wtoi(hours.c_str()));        
        wchar_t buff[10];
        _itow(h, buff, 10);
        hours = buff;
    }
       
#if defined(_MSC_VER) //&& defined(_M_X64)        
    std::wostringstream oss;
    oss << std::setw(2) << std::setfill(wchar_t('0')) << hours   << L":" <<
           std::setw(2) << std::setfill(wchar_t('0')) << minutes << L":" << 
           std::setw(2) << std::setfill(wchar_t('0')) << seconds;
    return oss.str();
#elif defined( __MINGW32__ )
#define ADD_AS_PREFILLED( st, out ) \
    if ( st.length() == 0 ) \
        out += L"00"; \
    else if ( st.length() == 1 ) \
        out += L"0"; \
    out += st;

    std::wstring result;
    ADD_AS_PREFILLED( hours, result )
    result += L":";
    ADD_AS_PREFILLED( minutes, result )
    result += L":";
    ADD_AS_PREFILLED( seconds, result )

    return result;
#undef ADD_AS_PREFILLED
/*
#else
    std::wostringstream oss;
    oss << std::setw(2) << std::setfill('0') << hours   << L":" <<
           std::setw(2) << std::setfill('0') << minutes << L":" << 
           std::setw(2) << std::setfill('0') << seconds;
    return oss.str();
*/
#endif    
}