"""proteus.cli.commands.play — the ``play`` subcommand (human via stdin)."""

from __future__ import annotations

import argparse
import sys

from proteus.game.agents import HumanAgent
from proteus.game.engine.difficulty import Difficulty
from proteus.game.scenarios.base import list_scenarios
from proteus.game.runtime import SessionRunner, append_trace
from proteus.cli.commands.run import _auto_gif


def _cmd_play(args: argparse.Namespace) -> int:
    if args.scenario not in list_scenarios():
        print(
            f"Unknown scenario {args.scenario!r}. "
            f"Available scenarios: {', '.join(list_scenarios())}.",
            file=sys.stderr,
        )
        return 2
    agent = HumanAgent()
    runner = SessionRunner(
        args.scenario,
        agent,
        difficulty=Difficulty(args.difficulty),
        seed=args.seed,
        play_turns=args.play_turns,
        use_probe=args.probe,
    )
    try:
        trace = runner.run()
    except EOFError:
        print("stdin closed before the session finished.", file=sys.stderr)
        return 2
    accuracy = trace.metrics["motive_reading_accuracy"]
    print(
        f"{trace.scenario} seed={trace.seed} {trace.difficulty} "
        f"model={trace.model} -> {trace.outcome} "
        f"| motive_reading_accuracy={accuracy:.1f}% "
        f"| reactivity_index={trace.metrics['reactivity_index']:.1f}%"
    )
    if args.out:
        written = append_trace(trace, args.out)
        print(f"trace appended to {written}")
    _auto_gif(args.out, args.no_gif)
    return 0