"""
Module providing a simple management interface to a chronos cluster.

Currently this only works when run through a proxy minion.

.. versionadded:: 2015.8.2
"""

import logging

import salt.utils.http
import salt.utils.json
import salt.utils.platform
from salt.exceptions import get_error_message

__proxyenabled__ = ["chronos"]
log = logging.getLogger(__file__)


def __virtual__():
    # only valid in proxy minions for now
    return salt.utils.platform.is_proxy() and "proxy" in __opts__


def _base_url():
    """
    Return the proxy configured base url.
    """
    base_url = "http://locahost:4400"
    if "proxy" in __opts__:
        base_url = __opts__["proxy"].get("base_url", base_url)
    return base_url


def _jobs():
    """
    Return the currently configured jobs.
    """
    response = salt.utils.http.query(
        "{}/scheduler/jobs".format(_base_url()),
        decode_type="json",
        decode=True,
    )
    jobs = {}
    for job in response["dict"]:
        jobs[job.pop("name")] = job
    return jobs


def jobs():
    """
    Return a list of the currently installed job names.

    CLI Example:

    .. code-block:: bash

        salt chronos-minion-id chronos.jobs
    """
    job_names = _jobs().keys()
    job_names.sort()
    return {"jobs": job_names}


def has_job(name):
    """
    Return whether the given job is currently configured.

    CLI Example:

    .. code-block:: bash

        salt chronos-minion-id chronos.has_job my-job
    """
    return name in _jobs()


def job(name):
    """
    Return the current server configuration for the specified job.

    CLI Example:

    .. code-block:: bash

        salt chronos-minion-id chronos.job my-job
    """
    jobs = _jobs()
    if name in jobs:
        return {"job": jobs[name]}
    return None


def update_job(name, config):
    """
    Update the specified job with the given configuration.

    CLI Example:

    .. code-block:: bash

        salt chronos-minion-id chronos.update_job my-job '<config yaml>'
    """
    if "name" not in config:
        config["name"] = name
    data = salt.utils.json.dumps(config)
    try:
        response = salt.utils.http.query(
            "{}/scheduler/iso8601".format(_base_url()),
            method="POST",
            data=data,
            header_dict={"Content-Type": "application/json"},
        )
        log.debug("update response: %s", response)
        return {"success": True}
    except Exception as ex:  # pylint: disable=broad-except
        log.error("unable to update chronos job: %s", get_error_message(ex))
        return {"exception": {"message": get_error_message(ex)}}


def rm_job(name):
    """
    Remove the specified job from the server.

    CLI Example:

    .. code-block:: bash

        salt chronos-minion-id chronos.rm_job my-job
    """
    response = salt.utils.http.query(
        "{}/scheduler/job/{}".format(_base_url(), name),
        method="DELETE",
    )
    return True
