#ifndef TUNIT_INCLUDED

#define TUNIT_INCLUDED

#include "tcommon.h"

#undef DVAPI

#undef DVVAR

#ifdef TNZBASE_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

#ifdef WIN32

#pragma warning(push)

#pragma warning(disable : 4251)

#endif

//---------------------------

class DVAPI TUnitConverter

{

public:

	virtual ~TUnitConverter() {}

	virtual TUnitConverter *clone() const = 0;

	virtual double convertTo(double v) const = 0;

	virtual double convertFrom(double v) const = 0;

};

//---------------------------

class DVAPI TSimpleUnitConverter : public TUnitConverter

{

	const double m_factor, m_offset;

public:

	TSimpleUnitConverter(double factor = 1, double offset = 0)

		: m_factor(factor), m_offset(offset) {}

	TUnitConverter *clone() const { return new TSimpleUnitConverter(*this); }

	double convertTo(double v) const { return v * m_factor + m_offset; }

	double convertFrom(double v) const { return (v - m_offset) / m_factor; }

};

//---------------------------

class DVAPI TUnit

{

	wstring m_defaultExtension;

	std::vector<wstring> m_extensions;</wstring>

	TUnitConverter *m_converter;

public:

	TUnit(wstring ext, TUnitConverter *converter = 0);

	TUnit(const TUnit &);

	~TUnit();

	TUnit *clone() const { return new TUnit(*this); }

	const std::vector<wstring> &getExtensions() const { return m_extensions; }</wstring>

	void addExtension(wstring ext);

	bool isExtension(wstring ext) const;

	wstring getDefaultExtension() const { return m_defaultExtension; }

	void setDefaultExtension(wstring ext);

	double convertTo(double v) const { return m_converter->convertTo(v); }

	double convertFrom(double v) const { return m_converter->convertFrom(v); }

private:

	// not implemented

	TUnit &operator=(const TUnit &);

};

//---------------------------

class DVAPI TMeasure

{

	string m_name;

	TUnit *m_mainUnit, *m_currentUnit, *m_standardUnit;

	std::map<wstring, *="" tunit=""> m_extensions;</wstring,>

	double m_defaultValue;

public:

	TMeasure(string name, TUnit *mainUnit);

	TMeasure(const TMeasure &);

	~TMeasure();

	string getName() const { return m_name; }

	void setName(string name) { m_name = name; }

	void add(TUnit *unit);

	// main unit e' quella usata "internamente". puo' essere "strana"

	const TUnit *getMainUnit() const { return m_mainUnit; }

	// current unit e' quella ad es. definita in preferences

	const TUnit *getCurrentUnit() const { return m_currentUnit; }

	void setCurrentUnit(TUnit *unit);

	// standard unit e' quella usata nelle espressioni

	const TUnit *getStandardUnit() const { return m_standardUnit; }

	void setStandardUnit(TUnit *unit);

	TUnit *getUnit(wstring ext) const;

	// defaultValue e' espresso in main unit

	double getDefaultValue() const { return m_defaultValue; }

	void setDefaultValue(double v) { m_defaultValue = v; }

private:

	// not implemented

	TMeasure &operator=(const TMeasure &);

};

//---------------------------

class DVAPI TMeasureManager

{ // singleton

	std::map<string, *="" tmeasure=""> m_measures;</string,>

	TMeasureManager();

public:

	static TMeasureManager *instance()

	{

		static TMeasureManager _instance;

		return &_instance;

	}

	void add(TMeasure *m);

	TMeasure *get(string name) const;

	typedef double CameraSizeProvider();

	void addCameraMeasures(CameraSizeProvider *cameraSizeProvider);

};

//---------------------------

class DVAPI TMeasuredValue

{

	const TMeasure *m_measure;

	double m_value;

public:

	TMeasuredValue(string measureName);

	~TMeasuredValue();

	const TMeasure *getMeasure() const { return m_measure; }

	void setMeasure(const TMeasure *measure);

	void setMeasure(string measureName);

	enum UnitType { MainUnit,

					CurrentUnit };

	double getValue(UnitType uType) const

	{

		return uType == MainUnit ? m_value : m_measure->getCurrentUnit()->convertTo(m_value);

	}

	void setValue(UnitType uType, double value)

	{

		m_value = uType == MainUnit ? value : m_measure->getCurrentUnit()->convertFrom(value);

	}

	bool setValue(wstring s, int *pErr = 0); // if pErr != then *pErr contains error code. *pErr == 0 means OK

	wstring toWideString(int decimals = 7) const;

private:

	// not implemented

	TMeasuredValue(const TMeasuredValue &);

	TMeasuredValue &operator=(const TMeasuredValue &);

};

//---------------------------

// bruttacchietto. L'aspect ratio della field guide viene usata nelle conversioni

// fra fld e inch sulla verticale

namespace UnitParameters

{

typedef std::pair<double, double=""> (*CurrentDpiGetter)();</double,>

DVAPI void setFieldGuideAspectRatio(double ar);

DVAPI double getFieldGuideAspectRatio();

DVAPI void setCurrentDpiGetter(CurrentDpiGetter f);

}

//---------------------------

#ifdef WIN32

#pragma warning(pop)

#endif

#endif