from abc import ABC, abstractmethod
from ._dag_list import DAG_LIST
import yaml
import os
import glob
import string
import json
import numpy as np
from astropy import time

DAG_RUN_ID_DIGITS = 6
DAG_CONFIG_DIR = os.path.join(
    os.path.dirname(os.path.dirname(__file__)),
    "dag_config",
)

"""
- BaseTrigger
  - AutomaticTrigger
  - ManualTrigger
    - with Parameters
    - without Parameters
"""


class BaseDAG(ABC):
    def __init__(self, dag_id: str):
        self.dag_id = dag_id
        assert dag_id in DAG_LIST, f"{dag_id} not in DAG_LIST"

        with open(f"{dag_id}.yml", "r") as f:
            self.dag = yaml.safe_load(f)
        assert (
            self.dag["dag_id"] == self.dag_id
        ), f"{dag_id} not consistent with definition in .yml file."
        with open(f"{dag_id}.json", "r") as f:
            self.msg_template = json.load(f)
        self.msg_keys = set(self.msg_template.keys())

    # @abstractmethod
    # def trigger(self, **kwargs) -> None:
    #     pass
    #
    def schedule(self, **kwargs):
        pass

    @staticmethod
    def gen_dag_run_id(digits=6):
        """
        Generate a unique run_id for a dag.
        """
        now = time.Time.now()
        dag_run_id = now.strftime("%Y%m%d-%H%M%S-")

        n = len(string.ascii_lowercase)
        for i in range(digits):
            dag_run_id += string.ascii_lowercase[np.random.randint(low=0, high=n)]
        return dag_run_id

    #
    # @abstractmethod
    # def push(self) -> None:
    #     pass

    # def __call__(self, **kwargs):
    #     self.trigger(**kwargs)