# -*- coding: utf-8 -*-
'''
Display return data in YAML format
==================================

This outputter defaults to printing in YAML block mode for better readability.

CLI Example:

.. code-block:: bash

    salt '*' foo.bar --out=yaml

Example output:

CLI Example:

.. code-block:: python

    saltmine:
      foo:
        bar: baz
        dictionary:
          abc: 123
          def: 456
        list:
          - Hello
          - World
'''
from __future__ import absolute_import, print_function, unicode_literals

# Import third party libs
import logging

# Import salt libs
import salt.utils.yaml

# Define the module's virtual name
__virtualname__ = 'yaml'

log = logging.getLogger(__name__)


def __virtual__():
    return __virtualname__


def output(data, **kwargs):  # pylint: disable=unused-argument
    '''
    Print out YAML using the block mode
    '''

    params = {}
    if 'output_indent' not in __opts__:
        # default indentation
        params.update(default_flow_style=False)
    elif __opts__['output_indent'] >= 0:
        # custom indent
        params.update(default_flow_style=False,
                      indent=__opts__['output_indent'])
    else:  # no indentation
        params.update(default_flow_style=True,
                      indent=0)
    try:
        return salt.utils.yaml.safe_dump(data, **params)
    except Exception as exc:  # pylint: disable=broad-except
        import pprint
        log.exception(
            'Exception %s encountered when trying to serialize %s',
            exc, pprint.pformat(data)
        )
