# -*- coding: utf-8 -*-
'''
State to control Apache modjk
'''
from __future__ import absolute_import

# Python Libs
import logging

log = logging.getLogger(__name__)


def __virtual__():
    '''
    Load this state if modjk is loaded
    '''

    return 'modjk.workers' in __salt__


def _bulk_state(saltfunc, lbn, workers, profile):
    '''
    Generic function for bulk worker operation
    '''
    ret = {'name': lbn,
           'result': True,
           'changes': {},
           'comment': ''}

    if not isinstance(workers, list):
        ret['result'] = False
        ret['comment'] = 'workers should be a list not a {0}'.format(
            type(workers)
        )
        return ret

    if __opts__['test']:
        ret['result'] = None
        return ret

    log.info('executing {0} to modjk workers {1}'.format(
        saltfunc, workers
    ))
    try:
        cmdret = __salt__[saltfunc](workers, lbn, profile=profile)
    except KeyError:
        ret['result'] = False
        ret['comment'] = 'unsupported function {0}'.format(
            saltfunc
        )
        return ret

    errors = []
    for worker, ok in cmdret.items():
        if not ok:
            errors.append(worker)

    ret['changes'] = {'status': cmdret}
    if errors:
        ret['result'] = False
        ret['comment'] = '{0} failed on some workers'.format(saltfunc)

    return ret


def worker_stopped(name, workers=None, profile='default'):
    '''
    Stop all the workers in the modjk load balancer

    Example:

    .. code-block:: yaml

        loadbalancer:
          modjk.worker_stopped:
            - workers:
              - app1
              - app2
    '''
    if workers is None:
        workers = []
    return _bulk_state(
        'modjk.bulk_stop', name, workers, profile
    )


def worker_activated(name, workers=None, profile='default'):
    '''
    Activate all the workers in the modjk load balancer

    Example:

    .. code-block:: yaml

        loadbalancer:
          modjk.worker_activated:
            - workers:
              - app1
              - app2
    '''
    if workers is None:
        workers = []
    return _bulk_state(
        'modjk.bulk_activate', name, workers, profile
    )


def worker_disabled(name, workers=None, profile='default'):
    '''
    Disable all the workers in the modjk load balancer

    Example:

    .. code-block:: yaml

        loadbalancer:
          modjk.worker_disabled:
            - workers:
              - app1
              - app2
    '''
    if workers is None:
        workers = []
    return _bulk_state(
        'modjk.bulk_disable', name, workers, profile
    )


def worker_recover(name, workers=None, profile='default'):
    '''
    Recover all the workers in the modjk load balancer

    Example:

    .. code-block:: yaml

        loadbalancer:
          modjk.worker_recover:
            - workers:
              - app1
              - app2
    '''
    if workers is None:
        workers = []
    return _bulk_state(
        'modjk.bulk_recover', name, workers, profile
    )
