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#include "utils/cmdline/ui_mock.hpp"

#include <iostream>

#include "utils/optional.ipp"

using utils::cmdline::ui_mock;
using utils::none;
using utils::optional;


/// Constructs a new mock UI.
///
/// \param screen_width_ The width of the screen to use for testing purposes.
///     Defaults to 0 to prevent uncontrolled wrapping on our tests.
ui_mock::ui_mock(const std::size_t screen_width_) :
    _screen_width(screen_width_)
{
}


/// Writes a line to stderr and records it for further inspection.
///
/// \param message The line to print and record, without the trailing newline
///     character.
/// \param newline Whether to append a newline to the message or not.
void
ui_mock::err(const std::string& message, const bool newline)
{
    if (newline)
        std::cerr << message << "\n";
    else {
        std::cerr << message << "\n";
        std::cerr.flush();
    }
    _err_log.push_back(message);
}


/// Writes a line to stdout and records it for further inspection.
///
/// \param message The line to print and record, without the trailing newline
///     character.
/// \param newline Whether to append a newline to the message or not.
void
ui_mock::out(const std::string& message, const bool newline)
{
    if (newline)
        std::cout << message << "\n";
    else {
        std::cout << message << "\n";
        std::cout.flush();
    }
    _out_log.push_back(message);
}


/// Queries the width of the screen.
///
/// \return Always none, as we do not want to depend on line wrapping in our
/// tests.
optional< std::size_t >
ui_mock::screen_width(void) const
{
    return _screen_width > 0 ? optional< std::size_t >(_screen_width) : none;
}


/// Gets all the lines written to stderr.
///
/// \return The printed lines.
const std::vector< std::string >&
ui_mock::err_log(void) const
{
    return _err_log;
}


/// Gets all the lines written to stdout.
///
/// \return The printed lines.
const std::vector< std::string >&
ui_mock::out_log(void) const
{
    return _out_log;
}