#include "./failure.h"

#include "../io/ansiescapecodes.h"

#include <iostream>

namespace ApplicationUtilities {

/*!
 * \class ApplicationUtilities::Failure
 * \brief The Failure class is thrown by an ArgumentParser when a parsing error occurs.
 *
 * \sa ApplicationUtilities::ArgumentParser
 */

/*!
 * Constructs a new Failure.
 */
Failure::Failure()
    : m_what("unspecified parsing exception")
{
}

/*!
 * Constructs a new Failure. \a what is a std::string
 * describing the cause of the Failure.
 */
Failure::Failure(const std::string &what)
    : m_what(what)
{
}

/*!
 * Destroys the Failure.
 */
Failure::~Failure() USE_NOTHROW
{
}

/*!
 * Returns a C-style character string describing the cause
 * of the Failure.
 */
const char *Failure::what() const USE_NOTHROW
{
    return m_what.c_str();
}

/*!
 * \brief Prints an error message "Unable to parse arguments: ..." for the specified \a failure.
 */
std::ostream &operator<<(std::ostream &o, const Failure &failure)
{
    using namespace std;
    using namespace EscapeCodes;
    return o << Phrases::Error << "Unable to parse arguments: " << TextAttribute::Reset << failure.what() << "\nSee --help for available commands."
             << endl;
}

} // namespace ApplicationUtilities