#pragma once

#ifndef TCLI_INCLUDED

#define TCLI_INCLUDED

#include <memory></memory>

//#include "tcommon.h"   contenuto in tconvert.h

#include "tconvert.h"

#include "tfilepath.h"

#undef DVAPI

#undef DVVAR

#ifdef TAPPTOOLS_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

//=========================================================

// forward declaration

class TFilePath;

//=========================================================

namespace TCli {

//=========================================================

inline bool fromStr(int &value, std::string s) {

  if (isInt(s)) {

    value = std::stoi(s);

    return true;

  } else

    return false;

}

inline bool fromStr(double &value, std::string s) {

  if (isDouble(s)) {

    value = std::stod(s);

    return true;

  } else

    return false;

}

inline bool fromStr(std::string &value, std::string s) {

  value = s;

  return true;

}

inline bool fromStr(TFilePath &value, std::string s) {

  value = TFilePath(s);

  return true;

}

//=========================================================

class UsageError {

  std::string m_msg;

public:

  UsageError(std::string msg) : m_msg(msg){};

  ~UsageError(){};

  std::string getError() const { return m_msg; };

};

//=========================================================

class DVAPI UsageElement {

protected:

  std::string m_name, m_help;

  bool m_selected;

public:

  UsageElement(std::string name, std::string help);

  virtual ~UsageElement(){};

  std::string getName() const { return m_name; };

  bool isSelected() const { return m_selected; };

  void select() { m_selected = true; };

  virtual bool isHidden() const { return false; };

  virtual bool isSwitcher() const { return false; };

  virtual bool isArgument() const { return false; };

  virtual bool isMultiArgument() const { return false; };

  void setHelp(std::string help) { m_help = help; };

  virtual void print(std::ostream &out) const;

  virtual void printHelpLine(std::ostream &out) const;

  virtual void dumpValue(std::ostream &out) const = 0;

  virtual void resetValue()                       = 0;

private:

  // not implemented

  UsageElement(const UsageElement &);

  UsageElement &operator=(const UsageElement &);

};

//=========================================================

class DVAPI Qualifier : public UsageElement {

protected:

  bool m_switcher;

public:

  Qualifier(std::string name, std::string help)

      : UsageElement(name, help), m_switcher(false){};

  ~Qualifier(){};

  bool isSwitcher() const override { return m_switcher; };

  bool isHidden() const override { return m_help == ""; };

  operator bool() const { return isSelected(); };

  virtual void fetch(int index, int &argc, char *argv[]) = 0;

  void print(std::ostream &out) const override;

};

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

class DVAPI SimpleQualifier : public Qualifier {

public:

  SimpleQualifier(std::string name, std::string help) : Qualifier(name, help){};

  ~SimpleQualifier(){};

  void fetch(int index, int &argc, char *argv[]) override;

  void dumpValue(std::ostream &out) const override;

  void resetValue() override;

};

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

class DVAPI Switcher : public SimpleQualifier {

public:

  Switcher(std::string name, std::string help) : SimpleQualifier(name, help) {

    m_switcher = true;

  };

  ~Switcher(){};

};

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

template <class t=""></class>

class QualifierT : public Qualifier {

  T m_value;

public:

  QualifierT<t>(std::string name, std::string help)</t>

      : Qualifier(name, help), m_value(){};

  ~QualifierT<t>(){};</t>

  T getValue() const { return m_value; };

  void fetch(int index, int &argc, char *argv[]) override {

    if (index + 1 >= argc) throw UsageError("missing argument");

    if (!fromStr(m_value, argv[index + 1]))

      throw UsageError(m_name + ": bad argument type /" +

                       std::string(argv[index + 1]) + "/");

    for (int i = index; i < argc - 1; i++) argv[i] = argv[i + 2];

    argc -= 2;

  };

  void dumpValue(std::ostream &out) const override {

    out << m_name << " = " << (isSelected() ? "on" : "off") << " : " << m_value

        << "\n";

  };

  void resetValue() override {

    m_value    = T();

    m_selected = false;

  };

};

//=========================================================

class DVAPI Argument : public UsageElement {

public:

  Argument(std::string name, std::string help) : UsageElement(name, help){};

  ~Argument(){};

  virtual void fetch(int index, int &argc, char *argv[]);

  virtual bool assign(char *) = 0;

  bool isArgument() const override { return true; };

};

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

template <class t=""></class>

class ArgumentT : public Argument {

  T m_value;

public:

  ArgumentT<t>(std::string name, std::string help) : Argument(name, help){};</t>

  ~ArgumentT<t>(){};</t>

  operator T() const { return m_value; };

  T getValue() const { return m_value; };

  bool assign(char *src) override { return fromStr(m_value, src); };

  void dumpValue(std::ostream &out) const override {

    out << m_name << " = " << m_value << "\n";

  };

  void resetValue() override {

    m_value    = T();

    m_selected = false;

  };

};

//=========================================================

class DVAPI MultiArgument : public Argument {

protected:

  int m_count, m_index;

public:

  MultiArgument(std::string name, std::string help)

      : Argument(name, help), m_count(0), m_index(0){};

  ~MultiArgument(){};

  int getCount() const { return m_count; };

  void fetch(int index, int &argc, char *argv[]) override;

  bool isMultiArgument() const override { return true; };

  virtual void allocate(int count) = 0;

};

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

template <class t=""></class>

class MultiArgumentT : public MultiArgument {

  std::unique_ptr<t[]> m_values;</t[]>

public:

  MultiArgumentT(std::string name, std::string help)

      : MultiArgument(name, help) {}

  T operator[](int index) {

    assert(0 <= index && index < m_count);

    return m_values[index];

  };

  bool assign(char *src) override {

    assert(0 <= m_index && m_index < m_count);

    return fromStr(m_values[m_index], src);

  };

  void dumpValue(std::ostream &out) const override {

    out << m_name << " = {";

    for (int i = 0; i < m_count; i++) out << " " << m_values[i];

    out << "}" << std::endl;

  };

  void resetValue() override {

    m_values.reset();

    m_count = m_index = 0;

  };

  void allocate(int count) override {

    m_values.reset((count > 0) ? new T[count] : nullptr);

    m_count = count;

    m_index = 0;

  };

};

//=========================================================

typedef UsageElement *UsageElementPtr;

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

class DVAPI UsageLine {

protected:

  std::unique_ptr<usageelementptr[]> m_elements;</usageelementptr[]>

  int m_count;

public:

  UsageLine();

  virtual ~UsageLine();

  UsageLine(const UsageLine &ul);

  UsageLine &operator=(const UsageLine &ul);

  UsageLine(int count);

  UsageLine(const UsageLine &, UsageElement &elem);

  UsageLine(UsageElement &elem);

  UsageLine(UsageElement &a, UsageElement &b);

  UsageLine operator+(UsageElement &);

  int getCount() const { return m_count; };

  UsageElementPtr &operator[](int index) { return m_elements[index]; };

  const UsageElementPtr &operator[](int index) const {

    return m_elements[index];

  };

};

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

DVAPI UsageLine operator+(UsageElement &a, UsageElement &b);

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

class DVAPI Optional : public UsageLine {

public:

  Optional(const UsageLine &ul);

  ~Optional(){};

};

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

DVAPI UsageLine operator+(const UsageLine &a, const Optional &b);

//=========================================================

class UsageImp;

class DVAPI Usage {

  std::unique_ptr<usageimp> m_imp;</usageimp>

public:

  Usage(std::string progName);

  ~Usage();

  void add(const UsageLine &);

  void print(std::ostream &out) const;

  void dumpValues(std::ostream &out) const;  // per debug

  bool parse(int argc, char *argv[], std::ostream &err = std::cerr);

  bool parse(const char *argvString, std::ostream &err = std::cerr);

  void clear();  // per debug

private:

  // not implemented

  Usage(const Usage &);

  Usage &operator=(const Usage &);

};

//=========================================================

typedef QualifierT<int> IntQualifier;</int>

typedef QualifierT<double> DoubleQualifier;</double>

typedef QualifierT<std::string> StringQualifier;</std::string>

typedef ArgumentT<int> IntArgument;</int>

typedef ArgumentT<double> DoubleArgument;</double>

typedef ArgumentT<std::string> StringArgument;</std::string>

typedef ArgumentT<tfilepath> FilePathArgument;</tfilepath>

typedef MultiArgumentT<int> IntMultiArgument;</int>

typedef MultiArgumentT<double> DoubleMultiArgument;</double>

typedef MultiArgumentT<std::string> StringMultiArgument;</std::string>

typedef MultiArgumentT<tfilepath> FilePathMultiArgument;</tfilepath>

//=========================================================

class DVAPI RangeQualifier : public Qualifier {

  int m_from, m_to;

public:

  RangeQualifier();

  ~RangeQualifier(){};

  int getFrom() const { return m_from; };

  int getTo() const { return m_to; };

  bool contains(int frame) const { return m_from <= frame && frame <= m_to; };

  void fetch(int index, int &argc, char *argv[]) override;

  void dumpValue(std::ostream &out) const override;

  void resetValue() override;

};

//=========================================================

}  // namespace TCli

#endif  // TCLI_INCLUDED