#include "ProgressBar.h"

#include <iostream>

#include <limits>

#include <mutex>

#include "IOStreamConsole.h"

using std::string;

namespace cpputils {

ProgressBar::ProgressBar(const char* preamble, uint64_t max_value)

: ProgressBar(std::make_shared<IOStreamConsole>(), preamble, max_value) {}

ProgressBar::ProgressBar(std::shared_ptr<Console> console, const char* preamble, uint64_t max_value)

: _console(std::move(console))

, _preamble(string("\r") + preamble + " ")

, _max_value(max_value)

, _lastPercentage(std::numeric_limits<decltype(_lastPercentage)>::max()) {

ASSERT(_max_value > 0, "Progress bar can't handle max_value of 0");

_console->print("\n");

// show progress bar. _lastPercentage is different to zero, so it shows.

update(0);

}

void ProgressBar::update(uint64_t value) {

const size_t percentage = (100 * value) / _max_value;

if (percentage != _lastPercentage) {

_console->print(_preamble + std::to_string(percentage) + "%");

_lastPercentage = percentage;

}

}

}