"""Windows utility functions: idle time, workstation lock, etc."""

import ctypes
from ctypes import wintypes
import time
from datetime import datetime

# Windows API: LASTINPUTINFO struct for idle detection
class LASTINPUTINFO(ctypes.Structure):
    _fields_ = [("cbSize", wintypes.UINT), ("dwTime", wintypes.DWORD)]

user32 = ctypes.windll.user32
kernel32 = ctypes.windll.kernel32

def get_idle_time_seconds() -> float:
    """Return seconds since last user input (keyboard or mouse)."""
    last_input = LASTINPUTINFO()
    last_input.cbSize = ctypes.sizeof(LASTINPUTINFO)
    if user32.GetLastInputInfo(ctypes.byref(last_input)):
        millis = kernel32.GetTickCount() - last_input.dwTime
        return millis / 1000.0
    return 0.0

def lock_workstation() -> bool:
    """Lock the current workstation (same as Win+L)."""
    return bool(user32.LockWorkStation())

def get_timestamp() -> str:
    """ISO-like timestamp for filenames and logs."""
    return datetime.now().strftime("%Y%m%d_%H%M%S_%f")[:-3]

def format_event(event_type: str, details: str) -> str:
    """Simple event string."""
    return f"[{datetime.now().isoformat()}] {event_type}: {details}"