from tempfile import mkdtemp
from shutil import rmtree

from docutils.nodes import (
    list_item, paragraph,
)
from mock import Mock
from spec import eq_
from sphinx.application import Sphinx
import six
import sphinx

from releases import (
    Issue,
    issues_role,
    Release,
    release_role,
    construct_releases,
)
from releases import setup as releases_setup # avoid unittest crap



def make_app(**kwargs):
    # Create a real Sphinx app, with stupid temp dirs because it assumes.
    # Helps catch things like "testing a config option but forgot
    # app.add_config_value()"
    src, dst, doctree = mkdtemp(), mkdtemp(), mkdtemp()
    try:
        # STFU Sphinx :(
        Sphinx._log = lambda self, message, wfile, nonl=False: None
        app = Sphinx(
            srcdir=src,
            confdir=None,
            outdir=dst,
            doctreedir=doctree,
            buildername='html',
        )
    finally:
        [rmtree(x) for x in (src, doctree)]
    releases_setup(app)
    # Mock out the config within. More horrible assumptions by Sphinx :(
    config = {
        'releases_release_uri': 'foo_%s',
        'releases_issue_uri': 'bar_%s',
        'releases_debug': False,
    }
    # Allow tinkering with document filename
    if 'docname' in kwargs:
        app.env.temp_data['docname'] = kwargs.pop('docname')
    # Allow config overrides
    for name in kwargs:
        config['releases_{0}'.format(name)] = kwargs[name]
    # Stitch together as the sphinx app init() usually does w/ real conf files
    app.config._raw_config = config
    # init_values() requires a 'warn' runner on Sphinx 1.3+, give it no-op.
    init_args = []
    if sphinx.version_info[:2] > (1, 2):
        init_args = [lambda x: x]
    app.config.init_values(*init_args)
    return app

def inliner(app=None):
    app = app or make_app()
    return Mock(document=Mock(settings=Mock(env=Mock(app=app))))

# Obtain issue() object w/o wrapping all parse steps
def issue(type_, number, **kwargs):
    text = str(number)
    if kwargs.get('backported', False):
        text += " backported"
    if kwargs.get('major', False):
        text += " major"
    if kwargs.get('line', None):
        text += " (%s+)" % kwargs['line']
    app = kwargs.get('app', None)
    return issues_role(
        name=type_,
        rawtext='',
        text=text,
        lineno=None,
        inliner=inliner(app=app),
    )[0][0]

# Even shorter shorthand!
def b(number, **kwargs):
    return issue('bug', str(number), **kwargs)

def f(number, **kwargs):
    return issue('feature', str(number), **kwargs)

def s(number, **kwargs):
    return issue('support', str(number), **kwargs)

def entry(i):
    """
    Easy wrapper for issue/release objects.

    Default is to give eg an issue/release object that gets wrapped in a LI->P.

    May give your own (non-issue/release) object to skip auto wrapping. (Useful
    since entry() is often called a few levels deep.)
    """
    if not isinstance(i, (Issue, Release)):
        return i
    return list_item('', paragraph('', '', i))

def release(number, **kwargs):
    app = kwargs.get('app', None)
    nodes = release_role(
        name=None,
        rawtext='',
        text='%s <2013-11-20>' % number,
        lineno=None,
        inliner=inliner(app=app),
    )[0]
    return list_item('', paragraph('', '', *nodes))

def release_list(*entries, **kwargs):
    skip_initial = kwargs.pop('skip_initial', False)
    entries = list(entries) # lol tuples
    # Translate simple objs into changelog-friendly ones
    for index, item in enumerate(entries):
        if isinstance(item, six.string_types):
            entries[index] = release(item)
        else:
            entries[index] = entry(item)
    # Insert initial/empty 1st release to start timeline
    if not skip_initial:
        entries.append(release('1.0.0'))
    return entries

def changelog2dict(changelog):
    d = {}
    for r in changelog:
        d[r['obj'].number] = r['entries']
    return d

def releases(*entries, **kwargs):
    app = kwargs.pop('app', None) or make_app()
    return construct_releases(release_list(*entries, **kwargs), app)

def setup_issues(self):
    self.f = f(12)
    self.s = s(5)
    self.b = b(15)
    self.mb = b(200, major=True)
    self.bf = f(27, backported=True)
    self.bs = s(29, backported=True)

def expect_releases(entries, release_map, skip_initial=False):
    kwargs = {'skip_initial': skip_initial}
    changelog = changelog2dict(releases(*entries, **kwargs))
    err = "Got unexpected contents for {0}: wanted {1}, got {2}"
    for rel, issues in six.iteritems(release_map):
        eq_(changelog[rel], issues, err.format(rel, issues, changelog[rel]))