import os
import datetime

from model import Model

from typing import TYPE_CHECKING
if TYPE_CHECKING:
    from controller_db import ControllerDB


class Computation:

    def __init__(self, c_db: 'ControllerDB'):
        self.c_db = c_db
        self.pid = os.getpid()

    def run(self, str_code='0', s_id=None):
        sample_random = self.c_db.fetch_a_sample(s_id)
        if sample_random is None:
            return True

        # lock this row by update is_done_flag to 0
        self.c_db.lock_the_sample(sample_random)
        print(
            f"Pid {self.pid} ({str_code}) is running "
            f"sample {sample_random.id} at {datetime.datetime.now()}")

        dct_exp = {column: getattr(sample_random.experiment, column)
                   for column in sample_random.experiment.__table__.c.keys()}
        del dct_exp['id']

        dct_sample_para = {'sample': sample_random,
                           'seed': sample_random.seed,
                           **dct_exp}
        model = Model(dct_sample_para)
        model.run(display=False)
        return False