# -*- coding: utf-8 -*-
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import logging

import datadog

from code_coverage_backend import config
from code_coverage_backend import taskcluster

logger = logging.getLogger(__name__)

__stats = None


def get_stats():
    """
    Configure a shared ThreadStats instance for datadog
    """
    global __stats

    if __stats is not None:
        return __stats

    app_channel = taskcluster.secrets["APP_CHANNEL"]

    if taskcluster.secrets.get("DATADOG_API_KEY"):
        datadog.initialize(
            api_key=taskcluster.secrets["DATADOG_API_KEY"],
            host_name=f"coverage.{app_channel}.moz.tools",
        )
    else:
        logger.info("No datadog credentials")

    # Must be instantiated after initialize
    # https://datadogpy.readthedocs.io/en/latest/#datadog-threadstats-module
    __stats = datadog.ThreadStats(
        constant_tags=[config.PROJECT_NAME, f"channel:{app_channel}"]
    )
    __stats.start(flush_in_thread=True)
    return __stats