#include "input.hpp"

#include <unistd.h>

void InputHandler::listen() const
{
	char character = 0;

	while (read(STDIN_FILENO, &character, 1) == 1)
	{
		notify(character);
	}
}

void InputHandler::attach(const char &event, Callback callback)
{
	if (_key_observers.count(event) == 0)
	{
		_key_observers[event] = std::vector<Callback>();
	}

	_key_observers[event].push_back(callback);
}

void InputHandler::notify(const char &event) const
{
	if (_key_observers.count(event) == 0)
	{
		return;
	}

	for (const auto &observer : _key_observers.at(event))
	{
		observer();
	}
}

void InputHandler::enter_raw_mode()
{
	if (_original_termios == nullptr)
	{
		_original_termios = std::make_shared<termios>();
	}

	tcgetattr(STDIN_FILENO, _original_termios.get());

	auto raw_termios = termios(*_original_termios);

	raw_termios.c_lflag &= static_cast<uint32_t>(~(ECHO | ICANON | ISIG));

	tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_termios);
}

void InputHandler::leave_raw_mode()
{
	if (_original_termios == nullptr)
	{
		return;
	}

	tcsetattr(STDIN_FILENO, TCSAFLUSH, _original_termios.get());

	_original_termios = nullptr;
}