""" k8s utils """

from typing import Optional
import os
import asyncio
import json
import sys
import signal
import atexit

from datetime import datetime

from slugify import slugify


def get_templates_dir():
    """return directory containing templates for loading"""
    return os.path.join(os.path.dirname(__file__), "templates")


def from_k8s_date(string):
    """convert k8s date string to datetime"""
    return datetime.fromisoformat(string[:-1]) if string else None


def to_k8s_date(dt_val):
    """convert datetime to string for k8s"""
    return dt_val.isoformat("T") + "Z"


def dt_now():
    """get current ts"""
    return datetime.utcnow().replace(microsecond=0, tzinfo=None)


def ts_now():
    """get current ts"""
    return str(dt_now())


def run_once_lock(name):
    """run once lock via temp directory
    - if dir doesn't exist, return true
    - if exists, return false"""
    lock_dir = "/tmp/." + name
    try:
        os.mkdir(lock_dir)
    # pylint: disable=bare-except
    except:
        return False

    # just in case, delete dir on exit
    def del_dir():
        print("release lock: " + lock_dir, flush=True)
        os.rmdir(lock_dir)

    atexit.register(del_dir)
    return True


def register_exit_handler():
    """register exit handler to exit on SIGTERM"""
    loop = asyncio.get_running_loop()

    def exit_handler():
        """sigterm handler"""
        print("SIGTERM received, exiting")
        sys.exit(1)

    loop.add_signal_handler(signal.SIGTERM, exit_handler)


def parse_jsonl_error_messages(errors):
    """parse json-l error strings from redis/db into json"""
    parsed_errors = []
    for error_line in errors:
        if not error_line:
            continue
        try:
            result = json.loads(error_line)
            parsed_errors.append(result)
        except json.JSONDecodeError as err:
            print(
                f"Error decoding json-l error line: {error_line}. Error: {err}",
                flush=True,
            )
    return parsed_errors


def is_bool(stri: Optional[str]) -> bool:
    """Check if the string parameter is stringly true"""
    if stri:
        return stri.lower() in ("true", "1", "yes")
    return False


def slug_from_name(name: str) -> str:
    """Generate slug from name"""
    return slugify(name.replace("'", ""))