"""最小示例：连接、收发、关闭。

用法（需本地已启动 nixmsg，并开放注册或已有端）：
  python examples/minimal.py ws://127.0.0.1:PORT/mqtt device-1 password12 peer-id
"""

from __future__ import annotations

import sys
import time

from nixmsg import Body, Client, SendOptions, Target


def main() -> None:
    if len(sys.argv) < 5:
        print(__doc__)
        raise SystemExit(2)
    url, eid, password, peer = sys.argv[1:5]
    c = Client()
    c.on_session(lambda token: print("session", token[:16] + "..."))
    c.on_message(lambda msg: print("msg", msg.from_id, msg.id, msg.body.data))
    c.on_connection(lambda ev: print("conn", ev.state.value, ev.reason))
    c.connect(url, eid, password=password)
    c.send(Target(kind="endpoint", id=peer), Body(data="hello from python"), SendOptions(delay_ms=0))
    time.sleep(2)
    c.close()


if __name__ == "__main__":
    main()