#
# 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 json
from email.mime.application import MIMEApplication
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText

from poster.encode import multipart_encode, MultipartParam
from twisted.internet import defer

from test.support.integration.soledad_test_base import SoledadTestBase


class RetrieveAttachmentTest(SoledadTestBase):
    @defer.inlineCallbacks
    def test_attachment_content_is_retrieved(self):
        attachment_id, input_mail = self._create_mail_with_attachment()
        yield self.app_test_client.mail_store.add_mail('INBOX', input_mail.as_string())

        requested_filename = "file name with space"
        expected_content_type = 'text/plain'
        expected_content_disposition = 'attachment; filename="file name with space"'

        attachment, req = yield self.app_test_client.get_attachment(attachment_id, 'base64', filename=requested_filename, content_type=expected_content_type)

        self.assertEqual(200, req.code)
        self.assertEquals('pretend to be binary attachment data', attachment)
        self.assertEquals(expected_content_disposition, req.responseHeaders.getRawHeaders('content-disposition')[0])
        self.assertEquals(expected_content_type, req.responseHeaders.getRawHeaders('content-type')[0])

    @defer.inlineCallbacks
    def test_should_retrieve_attachment_even_if_xsrf_token_not_passed(self):
        attachment_id, input_mail = self._create_mail_with_attachment()
        yield self.app_test_client.mail_store.add_mail('INBOX', input_mail.as_string())

        requested_filename = "file name with space"
        expected_content_type = 'text/plain'
        expected_content_disposition = 'attachment; filename="file name with space"'

        attachment, req = yield self.app_test_client.get_attachment(
            attachment_id, 'base64', filename=requested_filename,
            content_type=expected_content_type, ajax=False,
            csrf='mismatched token')

        self.assertEqual(200, req.code)
        self.assertEquals('pretend to be binary attachment data', attachment)
        self.assertEquals(expected_content_disposition, req.responseHeaders.getRawHeaders('content-disposition')[0])
        self.assertEquals(expected_content_type, req.responseHeaders.getRawHeaders('content-type')[0])

    def _create_mail_with_attachment(self):
        input_mail = MIMEMultipart()
        input_mail.attach(MIMEText(u'a utf8 message', _charset='utf-8'))
        attachment = MIMEApplication('pretend to be binary attachment data')
        attachment.add_header('Content-Disposition', 'attachment', filename='file name.txt')
        attachment.add_header('Content-Type', 'text/plain')
        input_mail.attach(attachment)
        attachment_id = 'B5B4ED80AC3B894523D72E375DACAA2FC6606C18EDF680FE95903086C8B5E14A'
        return attachment_id, input_mail

    @defer.inlineCallbacks
    def test_attachment_error_returned_if_id_not_found(self):
        attachment, req = yield self.app_test_client.get_attachment('invalid attachment id', 'base64')

        self.assertEqual(404, req.code)
        self.assertIsNone(attachment)

    @defer.inlineCallbacks
    def test_post_new_attachment(self):
        content_type = 'text/plain'
        filename = 'filename.txt'
        data = 'pretend to be binary attachment data'
        file = MultipartParam('attachment', value=data, filename=filename, filetype=content_type)
        datagen, headers = multipart_encode([file])
        post_data = "".join(datagen)

        _, req = yield self.app_test_client.post_attachment(post_data, headers)

        self.assertEqual(201, req.code)
        self.assertEqual('/attachment/B5B4ED80AC3B894523D72E375DACAA2FC6606C18EDF680FE95903086C8B5E14A', req.responseHeaders.getRawHeaders('location')[0])
        response_json = {'ident': 'B5B4ED80AC3B894523D72E375DACAA2FC6606C18EDF680FE95903086C8B5E14A',
                         'content-type': content_type,
                         'name': filename,
                         'size': len(data),
                         'encoding': 'base64'}
        self.assertEqual(response_json, json.loads(req.written[0]))