import logging

import structlog
from django.conf import settings
from rest_framework.throttling import UserRateThrottle
from structlog.types import EventDict


def structlog_add_app_info(
    logger: logging.Logger, method_name: str, event_dict: EventDict
) -> EventDict:
    event_dict["django_app"] = "vbv_lernwelt"
    event_dict["APP_ENVIRONMENT"] = settings.APP_ENVIRONMENT
    event_dict["django_app_dev_mode"] = f"vbv_lernwelt_{settings.APP_ENVIRONMENT}"

    return event_dict


def structlog_inject_context_dict(test, level, event_dict):
    """
    Add the structlog context dict to log events generated by the stdlib logging library.
    """
    context_class = structlog.get_config().get("context_class")

    if context_class:
        for key, value in context_class().items():
            if key not in event_dict:
                event_dict[key] = value

    return event_dict


class HourUserRateThrottle(UserRateThrottle):
    scope = "hour-throttle"


class DayUserRateThrottle(UserRateThrottle):
    scope = "day-throttle"


def first_true(iterable, default=False, pred=None):
    """Returns the first true value in the iterable.

    If no true value is found, returns *default*

    If *pred* is not None, returns the first item
    for which pred(item) is true.

    """
    # first_true([a,b,c], x) --> a or b or c or x
    # first_true([a,b], x, f) --> a if f(a) else b if f(b) else x
    return next(filter(pred, iterable), default)