#
# Copyright (c) 2014 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
import unittest
import email

from pixelated.maintenance import delete_all_mails, load_mails
from pixelated.bitmask_libraries.session import LeapSession
from pixelated.adapter.mailstore import MailStore
from leap.soledad.client import Soledad
from leap.soledad.common.document import SoledadDocument
from mock import MagicMock
from os.path import join
from twisted.internet import defer
import pkg_resources


class TestCommands(unittest.TestCase):

    def setUp(self):
        self.leap_session = MagicMock(spec=LeapSession)
        self.soledad = MagicMock(spec=Soledad)
        self.mail_store = MagicMock(spec=MailStore)
        self.leap_session.mail_store = self.mail_store

        self.args = (self.leap_session, self.soledad)

    def test_delete_all_mails_supports_empty_doclist(self):
        self.soledad.get_all_docs.return_value = (1, [])

        delete_all_mails(self.args)

        self.assertFalse(self.soledad.delete_doc.called)

    def test_delete_all_mails(self):
        doc = MagicMock(spec=SoledadDocument)
        doc.content = {'type': 'head'}
        self.soledad.get_all_docs.return_value = (1, [doc])

        delete_all_mails(self.args)

        self.soledad.delete_doc.assert_called_once_with(doc)

    def test_only_mail_documents_are_deleted(self):
        docs = self._create_docs_of_type(['head', 'cnt', 'flags', 'mbx', 'foo', None])
        self.soledad.get_all_docs.return_value = (1, docs)

        delete_all_mails(self.args)

        for doc in docs:
            if doc.content['type'] in ['head', 'cnt', 'flags']:
                self.soledad.delete_doc.assert_any_call(doc)
        self.assertEqual(3, len(self.soledad.delete_doc.mock_calls))

    def _create_docs_of_type(self, type_list):
        return [self._create_doc_type(t) for t in type_list]

    def _create_doc_type(self, doc_type):
        doc = MagicMock(spec=SoledadDocument)
        doc.content = {'type': doc_type}
        return doc

    def test_load_mails_empty_path_list(self):
        load_mails(self.args, [])

        self.assertFalse(self.mail_store.add_mailbox.called)

    def test_load_mails_adds_mails(self):
        # given
        mail_root = pkg_resources.resource_filename('test.unit.fixtures', 'mailset')
        firstMailDeferred = defer.succeed(MagicMock())
        secondMailDeferred = defer.succeed(MagicMock())
        self.mail_store.add_mail.side_effect = [firstMailDeferred, secondMailDeferred]
        self.mail_store.add_mailbox.return_value = defer.succeed(None)

        # when
        d = load_mails(self.args, [mail_root])

        # then
        def assert_mails_added(_):
            self.assertTrue(self.mail_store.add_mail.called)
            self.mail_store.add_mail.assert_any_call('INBOX', self._mail_content(join(mail_root, 'new', 'mbox00000000')))
            self.mail_store.add_mail.assert_any_call('INBOX', self._mail_content(join(mail_root, 'new', 'mbox00000001')))
            # TODO Should we check for flags?

        def error_callack(err):
            print err
            self.assertTrue(False)

        d.addCallback(assert_mails_added)
        d.addErrback(error_callack)

        return d

    def test_load_mails_supports_mbox(self):
        # given
        mbox_file = pkg_resources.resource_filename('test.unit.fixtures', 'mbox')

        d = load_mails(self.args, [mbox_file])

        # then
        def assert_mails_added(_):
            self.assertTrue(self.mail_store.add_mail.called)
            self.mail_store.add_mail.assert_any_call('INBOX', self._mail_content(mbox_file))

        def error_callack(err):
            print err
            self.assertTrue(False)

        d.addCallback(assert_mails_added)
        d.addErrback(error_callack)

        return d

    def _mail_content(self, mail_file):
        with open(mail_file, 'r') as fp:
            m = email.message_from_file(fp)
            return m.as_string()