from pathlib import Path
import os
import sys
import msvcrt
import time


FRAME_DELAY = 0.045
FRAME_SEPARATOR = "\f"


def main() -> int:
    root = Path(__file__).resolve().parent
    intro_path = root / "casino_intro.ans"
    if not intro_path.exists():
        print("casino_intro.ans not found")
        return 1

    os.system("chcp 65001 >nul")
    frames = intro_path.read_text(encoding="utf-8", errors="replace").split(FRAME_SEPARATOR)
    loop_marker = "@@LOOP@@\n"
    loop_start = 0
    for idx, frame in enumerate(frames):
        if frame.replace("\r\n", "\n") == loop_marker:
            loop_start = idx + 1
            break
    try:
        for frame in frames:
            if frame.replace("\r\n", "\n") == loop_marker:
                break
            sys.stdout.write(frame)
            sys.stdout.flush()
            start = time.time()
            while time.time() - start < FRAME_DELAY:
                if msvcrt.kbhit():
                    key = msvcrt.getwch()
                    if key == "\r":
                        return 0
                time.sleep(0.005)
        loop_frames = frames[loop_start:] if loop_start else frames
        while True:
            for frame in loop_frames:
                sys.stdout.write(frame)
                sys.stdout.flush()
                start = time.time()
                while time.time() - start < FRAME_DELAY:
                    if msvcrt.kbhit():
                        key = msvcrt.getwch()
                        if key == "\r":
                            return 0
                    time.sleep(0.005)
    finally:
        sys.stdout.write("\033[0m\033[?25h\033[2J\033[H")
        sys.stdout.flush()
    return 0


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