#pragma once


#include <locale>

#include "String.DString.hpp"
#include "String.WString.hpp"
using namespace eSTR::Literals;

#include "DDateTime.hpp"


#ifndef LOCALE_EXPORTS
#define _Localet_API		_declspec(dllimport)
#else
#define _Localet_API		_declspec(dllexport)
#endif



#ifndef LOCALE_EXPORTS

#ifdef _WIN64

#ifdef _DEBUG
#pragma comment (lib, "ECOM.Utility.Locale64D.lib") 
#else
#pragma comment (lib, "ECOM.Utility.Locale64.lib") 
#endif

#else	//	X86

#ifdef _DEBUG
#pragma comment (lib, "ECOM.Utility.LocaleD.lib") 
#else
#pragma comment (lib, "ECOM.Utility.Locale.lib") 
#endif

#endif

#endif  //  LOCALE_EXPORTS



namespace ECOM
{
namespace Utility
{

	class LocaleFormat : public ECOM::Utility::String::_string_format_detail <LocaleFormat>
	{
		_locale_t  m_Locale;

	public:
		inline LocaleFormat (char * buf, int NbOfChar, _locale_t loc) : _string_format_detail (buf, NbOfChar)
		{
			m_Locale = loc;
		}

	public:
		template <typename arg>
		inline int _my_sprintf (char * buf, int NbOfChar, const char * fmt, arg a)
		{
			return _sprintf_s_l (buf, NbOfChar, fmt, m_Locale, a);
		}
	};


//-----------------------------------------------------------------------------
//		Locale
//-----------------------------------------------------------------------------
class _Localet_API  Locale
{
	template <typename>  static constexpr bool dependent_false = false;

public:
	static Locale FromOS ();

public:
	Locale (CV_String & Name);
	Locale (const eSTR::DString & Name);
	~Locale ();

public:
	Locale (const Locale & from) = delete;
	Locale (Locale && from);

	Locale & operator = (const Locale & from) = delete;
	Locale & operator = (Locale && from);

public:
	template <typename... Args>
	inline eSTR::DString ToString (const char * szFormat, Args... args) const
	{
		constexpr int MaxLen = 8192;
		eSTR::DString rc;
		auto pc  = rc.GetBufferSetLength (MaxLen);
		auto len = ECOM::Utility::LocaleFormat (pc, MaxLen, m_Locale).Format (szFormat, args...);
		rc.ReleaseBuffer (len);
		return std::move (rc);
	}

public:
	enum enDateTime
	{
		enShortDate = 1,
		enLongDate = 2,
		enShortTime = 3,
		enLongTime = 4
	};

public:
	eSTR::WString ToString (const DDateTime & dt, enDateTime type) const;
	eSTR::WString ToString (const DDateTime & dt, CV_String & fmt) const;

public:
	template <typename T>
	static T GetFormatOf (enDateTime type)
	{
		static_assert (dependent_false <T>);
	}

	template <> static eSTR::WStringView GetFormatOf (enDateTime type);
	template <> static eSTR::DStringView GetFormatOf (enDateTime type);

public:
	eSTR::DString GetName () const;
	_locale_t GetLocale () const;

private:
	eSTR::DString    m_LocName;
	_locale_t  m_Locale;
};


}
}