# -*- coding: utf-8 -*-

# Import Python libs
from __future__ import absolute_import
import difflib
import logging

# Import Salt libs
import salt.ext.six as six
import salt.utils

# Import XML parser
import xml.etree.ElementTree as ET

log = logging.getLogger(__name__)


def _elements_equal(e1, e2):
    if e1.tag != e2.tag:
        return False
    if e1.text != e2.text:
        return False
    if e1.tail != e2.tail:
        return False
    if e1.attrib != e2.attrib:
        return False
    if len(e1) != len(e2):
        return False
    return all(_elements_equal(c1, c2) for c1, c2 in zip(e1, e2))


def present(name,
            config=None,
            **kwargs):
    '''
    Ensure the job is present in the Jenkins
    configured jobs
    name
        The unique name for the Jenkins job
    config
        The Salt URL for the file to use for
        configuring the job.
    '''

    ret = {'name': name,
           'result': True,
           'changes': {},
           'comment': ['Job {0} is up to date.'.format(name)]}

    _job_exists = __salt__['jenkins.job_exists'](name)

    if _job_exists:
        _current_job_config = __salt__['jenkins.get_job_config'](name)
        buf = six.moves.StringIO(_current_job_config)
        oldXML = ET.fromstring(buf.read())

        cached_source_path = __salt__['cp.cache_file'](config, __env__)
        with salt.utils.fopen(cached_source_path) as _fp:
            newXML = ET.fromstring(_fp.read())
        if not _elements_equal(oldXML, newXML):
            diff = difflib.unified_diff(
                ET.tostringlist(oldXML, encoding='utf8', method='xml'),
                ET.tostringlist(newXML, encoding='utf8', method='xml'), lineterm='')
            __salt__['jenkins.update_job'](name, config, __env__)
            ret['changes'] = ''.join(diff)
            ret['comment'].append('Job {0} updated.'.format(name))

    else:
        cached_source_path = __salt__['cp.cache_file'](config, __env__)
        with salt.utils.fopen(cached_source_path) as _fp:
            new_config_xml = _fp.read()

        __salt__['jenkins.create_job'](name, config, __env__)

        buf = six.moves.StringIO(new_config_xml)
        _current_job_config = buf.readlines()

        diff = difflib.unified_diff('', buf, lineterm='')
        ret['changes'] = ''.join(diff)
        ret['comment'].append('Job {0} added.'.format(name))

    ret['comment'] = '\n'.join(ret['comment'])
    return ret


def absent(name,
           **kwargs):
    '''
    Ensure the job is present in the Jenkins
    configured jobs

    name
        The name of the Jenkins job to remove.

    '''

    ret = {'name': name,
           'result': True,
           'changes': {},
           'comment': []}

    _job_exists = __salt__['jenkins.job_exists'](name)

    if _job_exists:
        __salt__['jenkins.delete_job'](name)
        ret['comment'] = 'Job {0} deleted.'.format(name)
    else:
        ret['comment'] = 'Job {0} already absent.'.format(name)
    return ret