#include "input.hpp"

#include <unistd.h>

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

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

void InputHandler::attach(const char &key,
						  const std::shared_ptr<ICommand> &command) noexcept
{
	auto key_index = _key_as_index(key);

	_key_commands.at(key_index).push_back(command);
}

void InputHandler::notify(const char &key) const noexcept
{
	auto key_index = _key_as_index(key);

	for (const auto &command : _key_commands.at(key_index))
	{
		command->execute();
	}
}

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

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

	_original_termios = nullptr;
}

InputHandler::_KeyCommandsSizeType InputHandler::_key_as_index(const char &key) noexcept
{
	return static_cast<_KeyCommandsSizeType>(static_cast<uint8_t>(key));
}