from pathlib import Path
import ctypes
import os
import sys
import time


FRAME_DELAY = 0.08
FRAME_SEPARATOR = "\f"


def place_window() -> None:
    try:
        user32 = ctypes.windll.user32
        hwnd = ctypes.windll.kernel32.GetConsoleWindow()
        if hwnd:
            screen_w = user32.GetSystemMetrics(0)
            x = 720 if screen_w >= 1500 else max(420, screen_w // 2)
            y = 40
            # Do not resize here: `mode con` controls the character grid.
            # Pixel resizing can make ANSI frames wrap and visually slide.
            user32.SetWindowPos(hwnd, 0, x, y, 0, 0, 0x0001)
    except Exception:
        pass


def main() -> int:
    root = Path(__file__).resolve().parents[2]
    path = root / "assets" / "animations" / "dbd_hook.ans"
    stop_path = root / "runtime" / "dbd_hook.stop"
    if not path.exists():
        print("dbd_hook.ans not found")
        return 1

    if stop_path.exists():
        stop_path.unlink()

    os.system("chcp 65001 >nul")
    place_window()
    frames = path.read_text(encoding="utf-8", errors="replace").split(FRAME_SEPARATOR)
    try:
        while not stop_path.exists():
            for frame in frames:
                if stop_path.exists():
                    break
                os.system("cls")
                sys.stdout.write(frame)
                sys.stdout.flush()
                time.sleep(FRAME_DELAY)
    finally:
        sys.stdout.write("\033[0m")
        sys.stdout.flush()
        if stop_path.exists():
            stop_path.unlink()
    return 0


if __name__ == "__main__":
    raise SystemExit(main())