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#!/usr/bin/env python3
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import argparse
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import json
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import logging
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import os
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import requests
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import shutil
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import sys
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import tempfile
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import time
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from subprocess import Popen, PIPE, TimeoutExpired
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from typing import List, Optional, Tuple
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parser = argparse.ArgumentParser()
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parser.add_argument("--token", type=str, required=True, help="API token.")
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parser.add_argument("--server", type=str, default="http://localhost:5000", help="Adresa severu.")
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parser.add_argument("--game", type=str, default="main", help="'main' nebo 'test_#'.")
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parser.add_argument("--command", type=str, nargs="+", default=["python3", "%"], help="Příkaz pro spuštění strategie. '%' bude nahrazeno programem.")
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parser.add_argument("--program", type=str, default="play.py", help="Program, který má být použít v příkazu.")
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parser.add_argument("--copy", default=False, action="store_true", help="Vyrob kopii souboru, aby se vždy použil stejný kód.")
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parser.add_argument("--log-level", type=str, default="info", choices=["error", "warning", "info"])
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parser.add_argument("--save-state", type=str, default=None, help="Pouze ulož herní info do souboru.")
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TIME_BEFORE_RETRY = 2.0
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger("client")
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def main(args: argparse.Namespace) -> None:
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logger.setLevel(args.log_level.upper())
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min_round = 0
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if args.save_state is None:
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command = get_command(args)
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while True:
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state = get_state(min_round, args)
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round = state["round"]
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min_round = round + 1
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# ulož herní stav a ukonči program
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if args.save_state is not None:
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if args.save_state == "-":
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print(json.dumps(state))
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else:
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with open(args.save_state, "w") as f:
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json.dump(state, f)
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return
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turn_json = run_subprocess(
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command, json.dumps(state), state["time_to_response"]
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)
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if turn_json is None:
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continue
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try:
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turn = json.loads(turn_json)
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except json.JSONDecodeError:
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logger.error(f"Strategie vypsala nevalidní JSON.")
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sys.exit(1)
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send_turn(turn, round, args)
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def get_command(args) -> List[str]:
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if args.program is None:
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logger.error("Specifikuj program.")
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sys.exit(1)
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program = os.path.realpath(args.program)
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if args.copy:
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program = tempfile.mktemp()
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shutil.copyfile(args.program, program)
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command: List[str] = []
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for arg in args.command:
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command.append(arg.replace("%", program))
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return command
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def run_subprocess(
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command: List[str], state_json: str, timeout: Optional[int]
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) -> Optional[str]:
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"""Spusť strategii a vypiš její výstup."""
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proc = Popen(command, encoding="utf-8",
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stdin=PIPE, stdout=PIPE, stderr=PIPE)
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try:
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stdout, stderr = proc.communicate(input=state_json, timeout=timeout)
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except TimeoutExpired:
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proc.kill()
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logger.error("Strategie se počítala příliš dlouho.")
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return None
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if stderr:
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logger.error(f"Chybový výstup strategie:\n{stderr}")
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if proc.returncode != 0:
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logger.error("Strategie skončila s chybovým návratovým kódem.")
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sys.exit(1)
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return stdout
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def get_state(min_round: int, args) -> dict:
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"""Opakovaně se pokus získat herní data ze serveru."""
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def get_state_once() -> Tuple[Optional[dict], float]:
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"""Vrací stav případě úspěchu, jinak None a dobu čekání."""
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try:
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res = requests.get(f"{args.server}/api/state", params={
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"game": args.game,
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"token": args.token,
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"min_round": min_round
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})
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except requests.exceptions.RequestException as e:
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# server mohl vypadnout, zkus to znovu později
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logger.warning(f"Chyba při dotazu na stav: {e}")
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return None, TIME_BEFORE_RETRY
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if not res.ok:
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log_server_error(res)
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sys.exit(1)
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state = res.json()
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if state["status"] == "ok":
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logger.info("Nový stav obdržen.")
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return state, 0
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# musíme chvíli počkat
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if state["status"] == "waiting":
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logger.info("Server počítá.")
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if state["status"] == "too_early":
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logger.info("Kolo ještě nezačalo.")
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return None, state["wait"]
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state, wait_time = get_state_once()
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while state is None:
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time.sleep(wait_time)
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state, wait_time = get_state_once()
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return state
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def send_turn(turn: dict, round: int, args) -> None:
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"""Opakovaně se pokus poslat tah na server."""
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def send_turn_once() -> bool:
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"""Vrací True pokud server odpověděl."""
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try:
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res = requests.post(
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f"{args.server}/api/action",
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params={
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"game": args.game,
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"token": args.token,
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"round": round
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},
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json=turn
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)
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except requests.exceptions.RequestException as e:
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# server mohl vypadnout, zkus to znovu později
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logger.warning(f"Chyba při posílání tahu: {e}")
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return False
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if not res.ok:
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log_server_error(res)
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sys.exit(1)
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# vypiš chyby
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# tyto chyby jsou způsobeny špatným tahem,
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# opakování požadavku nepomůže, takže vracíme True
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res_json = res.json()
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if res_json["status"] == "ok":
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logger.info("Tah úspěšně přijat.")
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elif res_json["status"] == "too_late":
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logger.error("Tah poslán příliš pozdě.")
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elif res_json["status"] == "error":
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logger.error(f"Chyba v tahu: {res_json['description']}")
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elif res_json["status"] == "warning":
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member_warns = "\n".join([
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f" {member['id']}: {member['description']}"
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for member in res_json["members"]
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])
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logger.info("Tah přijat s varováními.")
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logger.warning(f"Varování pro vojáky:\n{member_warns}")
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return True
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while not send_turn_once():
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time.sleep(TIME_BEFORE_RETRY)
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def log_server_error(res: requests.Response) -> None:
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res_json = res.json()
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logger.error(
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f"Chyba serveru: {res.status_code} {res.reason}: "
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f"{res_json['description']}"
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)
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if __name__ == "__main__":
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args = parser.parse_args()
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main(args)
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