"""`python -m lyra` (or `lyra`): a terminal REPL to talk to Lyra."""
from __future__ import annotations

import sys

from lyra import chat
from lyra.session import Session

_QUIT = {"exit", "quit", ":q"}


def main() -> int:
    session = Session()
    print(f"Lyra — session {session.id}. Ctrl-D or 'exit' to leave.\n")
    while True:
        try:
            user_msg = input("you > ").strip()
        except (EOFError, KeyboardInterrupt):
            print()
            break
        if not user_msg:
            continue
        if user_msg.lower() in _QUIT:
            break
        try:
            reply = chat.respond(session.id, user_msg)
        except Exception as exc:  # keep the loop alive; surface the error
            print(f"\n[error] {exc}\n", file=sys.stderr)
            continue
        print(f"\nlyra > {reply}\n")
    print("later.")
    return 0


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