"""A seat of a kaggle_environments game for a bot in its own process: env.run gets a function that passes each
observation to the bot's process and its answer back. A late or broken answer is the game's no-op."""
import json, os, sys

HERE = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.join(os.path.dirname(HERE), 'kit'))
from host import Child  # noqa: E402


def seat(folder, limit=1.0, idle=None, start=30):
    main = os.path.join(folder, 'main.py')
    if not os.path.isfile(main):
        sys.exit(f'No bot in {folder}: add main.py with agent(obs, config), as on Kaggle')
    child = Child([sys.executable, '-s', os.path.join(HERE, 'kaggle_child.py'), main], cwd=folder, limit=limit, start=start)

    def agent(obs, config):
        answer = child.ask({'obs': json.loads(json.dumps(obs, default=str)), 'config': json.loads(json.dumps(config, default=str))})
        return idle if answer is None else answer

    agent.child = child
    return agent