// KeyboardInput.cpp - Non-blocking keyboard input implementation

// Extracted from engine_sim_cli.cpp for SOLID SRP compliance

#include "KeyboardInput.h"

#ifndef _WIN32

#include <termios.h>

#include <unistd.h>

#include <fcntl.h>

#endif

// ============================================================================

// Terminal Keyboard Input Implementation

// ============================================================================

KeyboardInput::KeyboardInput() : oldSettings{}, initialized(false) {

#ifndef _WIN32

tcgetattr(STDIN_FILENO, &oldSettings);

termios newSettings = oldSettings;

newSettings.c_lflag &= ~(ICANON | ECHO);

newSettings.c_cc[VMIN] = 0;

newSettings.c_cc[VTIME] = 0;

tcsetattr(STDIN_FILENO, TCSANOW, &newSettings);

// Set non-blocking

int flags = fcntl(STDIN_FILENO, F_GETFL, 0);

fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK);

initialized = true;

#endif

}

KeyboardInput::~KeyboardInput() {

#ifndef _WIN32

if (initialized) {

tcsetattr(STDIN_FILENO, TCSANOW, &oldSettings);

}

#endif

}

int KeyboardInput::getKey() {

#ifdef _WIN32

return _kbhit() ? _getch() : -1;

#else

if (initialized) {

char c;

if (read(STDIN_FILENO, &c, 1) > 0) {

return c;

}

}

return -1;

#endif

}