# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4

###############################################################################
# OpenLP - Open Source Lyrics Projection                                      #
# --------------------------------------------------------------------------- #
# Copyright (c) 2008-2016 OpenLP Developers                                   #
# --------------------------------------------------------------------------- #
# This program is free software; you can redistribute it and/or modify it     #
# under the terms of the GNU General Public License as published by the Free  #
# Software Foundation; version 2 of the License.                              #
#                                                                             #
# This program 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 General Public License for    #
# more details.                                                               #
#                                                                             #
# You should have received a copy of the GNU General Public License along     #
# with this program; if not, write to the Free Software Foundation, Inc., 59  #
# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
###############################################################################
"""
This module contains tests for the OpenSong Bible importer.
"""

import json
import os
from unittest import TestCase

from lxml import etree, objectify

from tests.functional import MagicMock, patch, call
from tests.helpers.testmixin import TestMixin
from openlp.core.common import Registry
from openlp.core.lib.exceptions import ValidationError
from openlp.plugins.bibles.lib.importers.opensong import OpenSongBible
from openlp.plugins.bibles.lib.bibleimport import BibleImport

TEST_PATH = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                         '..', '..', '..', 'resources', 'bibles'))


class TestOpenSongImport(TestCase, TestMixin):
    """
    Test the functions in the :mod:`opensongimport` module.
    """

    def setUp(self):
        self.manager_patcher = patch('openlp.plugins.bibles.lib.db.Manager')
        self.addCleanup(self.manager_patcher.stop)
        self.manager_patcher.start()
        self.setup_application()
        self.app.process_events = MagicMock()
        Registry.create()
        Registry().register('application', self.app)

    def test_create_importer(self):
        """
        Test creating an instance of the OpenSong file importer
        """
        # GIVEN: A mocked out "manager"
        mocked_manager = MagicMock()

        # WHEN: An importer object is created
        importer = OpenSongBible(mocked_manager, path='.', name='.', filename='')

        # THEN: The importer should be an instance of BibleDB
        self.assertIsInstance(importer, BibleImport)

    def get_text_no_text_test(self):
        """
        Test that get_text handles elements containing text in a combination of text and tail attributes
        """
        # GIVEN: Some test data which contains an empty element and an instance of OpenSongBible
        test_data = objectify.fromstring('<element></element>')

        # WHEN: Calling get_text
        result = OpenSongBible.get_text(test_data)

        # THEN: A blank string should be returned
        self.assertEqual(result, '')

    def get_text_text_test(self):
        """
        Test that get_text handles elements containing text in a combination of text and tail attributes
        """
        # GIVEN: Some test data which contains all possible permutation of text and tail text possible and an instance
        #        of OpenSongBible
        test_data = objectify.fromstring('<element>Element text '
                                         '<sub_text_tail>sub_text_tail text </sub_text_tail>sub_text_tail tail '
                                         '<sub_text>sub_text text </sub_text>'
                                         '<sub_tail></sub_tail>sub_tail tail</element>')

        # WHEN: Calling get_text
        result = OpenSongBible.get_text(test_data)

        # THEN: The text returned should be as expected
        self.assertEqual(result, 'Element text sub_text_tail text sub_text_tail tail sub_text text sub_tail tail')

    def parse_chapter_number_test(self):
        """
        Test parse_chapter_number when supplied with chapter number and an instance of OpenSongBible
        """
        # GIVEN: The number 10 represented as a string
        # WHEN: Calling parse_chapter_nnumber
        result = OpenSongBible.parse_chapter_number('10', 0)

        # THEN: The 10 should be returned as an Int
        self.assertEqual(result, 10)

    def parse_chapter_number_empty_attribute_test(self):
        """
        Testparse_chapter_number when the chapter number is an empty string. (Bug #1074727)
        """
        # GIVEN: An empty string, and the previous chapter number set as 12  and an instance of OpenSongBible
        # WHEN: Calling parse_chapter_number
        result = OpenSongBible.parse_chapter_number('', 12)

        # THEN: parse_chapter_number should increment the previous verse number
        self.assertEqual(result, 13)

    def parse_verse_number_valid_verse_no_test(self):
        """
        Test parse_verse_number when supplied with a valid verse number
        """
        # GIVEN: The number 15 represented as a string and an instance of OpenSongBible
        # WHEN: Calling parse_verse_number
        result = OpenSongBible.parse_verse_number('15', 0)

        # THEN: parse_verse_number should return the verse number
        self.assertEqual(result, 15)

    def parse_verse_number_verse_range_test(self):
        """
        Test parse_verse_number when supplied with a verse range
        """
        # GIVEN: The range 24-26 represented as a string
        # WHEN: Calling parse_verse_number
        result = OpenSongBible.parse_verse_number('24-26', 0)

        # THEN: parse_verse_number should return the first verse number in the range
        self.assertEqual(result, 24)

    def parse_verse_number_invalid_verse_no_test(self):
        """
        Test parse_verse_number when supplied with a invalid verse number
        """
        # GIVEN: An non numeric string represented as a string
        # WHEN: Calling parse_verse_number
        result = OpenSongBible.parse_verse_number('invalid', 41)

        # THEN: parse_verse_number should increment the previous verse number
        self.assertEqual(result, 42)

    def parse_verse_number_empty_attribute_test(self):
        """
        Test parse_verse_number when the verse number is an empty string. (Bug #1074727)
        """
        # GIVEN: An empty string, and the previous verse number set as 14
        # WHEN: Calling parse_verse_number
        result = OpenSongBible.parse_verse_number('', 14)

        # THEN: parse_verse_number should increment the previous verse number
        self.assertEqual(result, 15)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    def parse_verse_number_invalid_type_test(self, mocked_log):
        """
        Test parse_verse_number when the verse number is an invalid type)
        """
        # GIVEN: A mocked out log, a Tuple, and the previous verse number set as 12
        # WHEN: Calling parse_verse_number
        result = OpenSongBible.parse_verse_number((1, 2, 3), 12)

        # THEN: parse_verse_number should log the verse number it was called with increment the previous verse number
        mocked_log.warning.assert_called_once_with('Illegal verse number: (1, 2, 3)')
        self.assertEqual(result, 13)

    @patch('openlp.plugins.bibles.lib.bibleimport.BibleImport.find_and_create_book')
    def process_books_stop_import_test(self, mocked_find_and_create_book):
        """
        Test process_books when stop_import is set to True
        """
        # GIVEN: An isntance of OpenSongBible
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')

        # WHEN: stop_import_flag is set to True
        importer.stop_import_flag = True
        importer.process_books(['Book'])

        # THEN: find_and_create_book should not have been called
        self.assertFalse(mocked_find_and_create_book.called)

    @patch('openlp.plugins.bibles.lib.bibleimport.BibleImport.find_and_create_book',
           **{'side_effect': ['db_book1', 'db_book2']})
    def process_books_completes_test(self, mocked_find_and_create_book):
        """
        Test process_books when it processes all books
        """
        # GIVEN: An instance of OpenSongBible Importer and two mocked books
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')

        book1 = MagicMock()
        book1.attrib = {'n': 'Name1'}
        book1.c = 'Chapter1'
        book2 = MagicMock()
        book2.attrib = {'n': 'Name2'}
        book2.c = 'Chapter2'
        importer.language_id = 10
        importer.process_chapters = MagicMock()
        importer.session = MagicMock()
        importer.stop_import_flag = False

        # WHEN: Calling process_books with the two books
        importer.process_books([book1, book2])

        # THEN: find_and_create_book and process_books should be called with the details from the mocked books
        self.assertEqual(mocked_find_and_create_book.call_args_list, [call('Name1', 2, 10), call('Name2', 2, 10)])
        self.assertEqual(importer.process_chapters.call_args_list,
                         [call('db_book1', 'Chapter1'), call('db_book2', 'Chapter2')])
        self.assertEqual(importer.session.commit.call_count, 2)

    def process_chapters_stop_import_test(self):
        """
        Test process_chapters when stop_import is set to True
        """
        # GIVEN: An isntance of OpenSongBible
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.parse_chapter_number = MagicMock()

        # WHEN: stop_import_flag is set to True
        importer.stop_import_flag = True
        importer.process_chapters('Book', ['Chapter1'])

        # THEN: importer.parse_chapter_number not have been called
        self.assertFalse(importer.parse_chapter_number.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.translate', **{'side_effect': lambda x, y: y})
    def process_chapters_completes_test(self, mocked_translate):
        """
        Test process_chapters when it completes
        """
        # GIVEN: An instance of OpenSongBible
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.parse_chapter_number = MagicMock()
        importer.parse_chapter_number.side_effect = [1, 2]
        importer.wizard = MagicMock()

        # WHEN: called with some valid data
        book = MagicMock()
        book.name = "Book"
        chapter1 = MagicMock()
        chapter1.attrib = {'n': '1'}
        chapter1.c = 'Chapter1'
        chapter1.v = ['Chapter1 Verses']
        chapter2 = MagicMock()
        chapter2.attrib = {'n': '2'}
        chapter2.c = 'Chapter2'
        chapter2.v = ['Chapter2 Verses']

        importer.process_verses = MagicMock()
        importer.stop_import_flag = False
        importer.process_chapters(book, [chapter1, chapter2])

        # THEN: parse_chapter_number, process_verses and increment_process_bar should have been called
        self.assertEqual(importer.parse_chapter_number.call_args_list, [call('1', 0), call('2', 1)])
        self.assertEqual(
            importer.process_verses.call_args_list,
            [call(book, 1, ['Chapter1 Verses']), call(book, 2, ['Chapter2 Verses'])])
        self.assertEqual(importer.wizard.increment_progress_bar.call_args_list,
                         [call('Importing Book 1...'), call('Importing Book 2...')])

    def process_verses_stop_import_test(self):
        """
        Test process_verses when stop_import is set to True
        """
        # GIVEN: An isntance of OpenSongBible
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.parse_verse_number = MagicMock()

        # WHEN: stop_import_flag is set to True
        importer.stop_import_flag = True
        importer.process_verses('Book', 1, 'Verses')

        # THEN: importer.parse_verse_number not have been called
        self.assertFalse(importer.parse_verse_number.called)

    def process_verses_completes_test(self):
        """
        Test process_verses when it completes
        """
        # GIVEN: An instance of OpenSongBible
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.get_text = MagicMock()
        importer.get_text.side_effect = ['Verse1 Text', 'Verse2 Text']
        importer.parse_verse_number = MagicMock()
        importer.parse_verse_number.side_effect = [1, 2]
        importer.wizard = MagicMock()

        # WHEN: called with some valid data
        book = MagicMock()
        book.id = 1
        verse1 = MagicMock()
        verse1.attrib = {'n': '1'}
        verse1.c = 'Chapter1'
        verse1.v = ['Chapter1 Verses']
        verse2 = MagicMock()
        verse2.attrib = {'n': '2'}
        verse2.c = 'Chapter2'
        verse2.v = ['Chapter2 Verses']

        importer.create_verse = MagicMock()
        importer.stop_import_flag = False
        importer.process_verses(book, 1, [verse1, verse2])

        # THEN: parse_chapter_number, process_verses and increment_process_bar should have been called
        self.assertEqual(importer.parse_verse_number.call_args_list, [call('1', 0), call('2', 1)])
        self.assertEqual(importer.get_text.call_args_list, [call(verse1), call(verse2)])
        self.assertEqual(
            importer.create_verse.call_args_list,
            [call(1, 1, 1, 'Verse1 Text'), call(1, 1, 2, 'Verse2 Text')])

    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.is_compressed')
    def validate_file_compressed_test(self, mocked_is_compressed):
        """
        Test that validate_file raises a ValidationError when supplied with a compressed file
        """
        # GIVEN: A mocked is_compressed method which returns True
        mocked_is_compressed.return_value = True

        # WHEN: Calling validate_file
        # THEN: ValidationError should be raised
        with self.assertRaises(ValidationError) as context:
            OpenSongBible.validate_file('file.name')
        self.assertEqual(context.exception.msg, 'Compressed file')

    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.parse_xml')
    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.is_compressed', **{'return_value': False})
    def validate_file_bible_test(self, mocked_is_compressed, mocked_parse_xml):
        """
        Test that validate_file returns True with valid XML
        """
        # GIVEN: Some test data with an OpenSong Bible "bible" root tag
        mocked_parse_xml.return_value = objectify.fromstring('<bible></bible>')

        # WHEN: Calling validate_file
        result = OpenSongBible.validate_file('file.name')

        # THEN: A True should be returned
        self.assertTrue(result)

    @patch('openlp.plugins.bibles.lib.importers.opensong.critical_error_message_box')
    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.parse_xml')
    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.is_compressed', **{'return_value': False})
    def validate_file_zefania_root_test(self, mocked_is_compressed, mocked_parse_xml, mocked_message_box):
        """
        Test that validate_file raises a ValidationError with a Zefinia root tag
        """
        # GIVEN: Some test data with a Zefinia "XMLBIBLE" root tag
        mocked_parse_xml.return_value = objectify.fromstring('<XMLBIBLE></XMLBIBLE>')

        # WHEN: Calling validate_file
        # THEN: critical_error_message_box should be called and an ValidationError should be raised
        with self.assertRaises(ValidationError) as context:
            OpenSongBible.validate_file('file.name')
        self.assertEqual(context.exception.msg, 'Invalid xml.')
        mocked_message_box.assert_called_once_with(
            message='Incorrect Bible file type supplied. This looks like a Zefania XML bible, please use the '
                    'Zefania import option.')

    @patch('openlp.plugins.bibles.lib.importers.opensong.critical_error_message_box')
    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.parse_xml')
    @patch('openlp.plugins.bibles.lib.importers.opensong.BibleImport.is_compressed', **{'return_value': False})
    def validate_file_invalid_root_test(self, mocked_is_compressed, mocked_parse_xml, mocked_message_box):
        """
        Test that validate_file raises a ValidationError with an invalid root tag
        """
        # GIVEN: Some test data with an invalid root tag and an instance of OpenSongBible
        mocked_parse_xml.return_value = objectify.fromstring('<song></song>')

        # WHEN: Calling validate_file
        # THEN: ValidationError should be raised, and the critical error message box should not have been called
        with self.assertRaises(ValidationError) as context:
            OpenSongBible.validate_file('file.name')
        self.assertEqual(context.exception.msg, 'Invalid xml.')
        self.assertFalse(mocked_message_box.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    @patch('openlp.plugins.bibles.lib.importers.opensong.trace_error_handler')
    def do_import_attribute_error_test(self, mocked_trace_error_handler, mocked_log):
        """
        Test do_import when an AttributeError exception is raised
        """
        # GIVEN: An instance of OpenSongBible and a mocked validate_file which raises an AttributeError
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.validate_file = MagicMock(**{'side_effect': AttributeError()})
        importer.parse_xml = MagicMock()

        # WHEN: Calling do_import
        result = importer.do_import()

        # THEN: do_import should return False after logging the exception
        mocked_log.exception.assert_called_once_with('Loading Bible from OpenSong file failed')
        mocked_trace_error_handler.assert_called_once_with(mocked_log)
        self.assertFalse(result)
        self.assertFalse(importer.parse_xml.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    @patch('openlp.plugins.bibles.lib.importers.opensong.trace_error_handler')
    def do_import_validation_error_test(self, mocked_trace_error_handler, mocked_log):
        """
        Test do_import when an ValidationError exception is raised
        """
        # GIVEN: An instance of OpenSongBible and a mocked validate_file which raises an ValidationError
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.validate_file = MagicMock(**{'side_effect': ValidationError()})
        importer.parse_xml = MagicMock()

        # WHEN: Calling do_import
        result = importer.do_import()

        # THEN: do_import should return False after logging the exception. parse_xml should not be called.
        mocked_log.exception.assert_called_once_with('Loading Bible from OpenSong file failed')
        mocked_trace_error_handler.assert_called_once_with(mocked_log)
        self.assertFalse(result)
        self.assertFalse(importer.parse_xml.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    @patch('openlp.plugins.bibles.lib.importers.opensong.trace_error_handler')
    def do_import_xml_syntax_error_test(self, mocked_trace_error_handler, mocked_log):
        """
        Test do_import when an etree.XMLSyntaxError exception is raised
        """
        # GIVEN: An instance of OpenSongBible and a mocked validate_file which raises an etree.XMLSyntaxError
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.validate_file = MagicMock(**{'side_effect': etree.XMLSyntaxError(None, None, None, None)})
        importer.parse_xml = MagicMock()

        # WHEN: Calling do_import
        result = importer.do_import()

        # THEN: do_import should return False after logging the exception. parse_xml should not be called.
        mocked_log.exception.assert_called_once_with('Loading Bible from OpenSong file failed')
        mocked_trace_error_handler.assert_called_once_with(mocked_log)
        self.assertFalse(result)
        self.assertFalse(importer.parse_xml.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    def do_import_no_language_test(self, mocked_log):
        """
        Test do_import when the user cancels the language selection dialog
        """
        # GIVEN: An instance of OpenSongBible and a mocked get_language which returns False
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.validate_file = MagicMock()
        importer.parse_xml = MagicMock()
        importer.get_language_id = MagicMock(**{'return_value': False})
        importer.process_books = MagicMock()

        # WHEN: Calling do_import
        result = importer.do_import()

        # THEN: do_import should return False and process_books should have not been called
        self.assertFalse(result)
        self.assertFalse(importer.process_books.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    def do_import_stop_import_test(self, mocked_log):
        """
        Test do_import when the stop_import_flag is set to True
        """
        # GIVEN: An instance of OpenSongBible and stop_import_flag set to True
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.validate_file = MagicMock()
        importer.parse_xml = MagicMock()
        importer.get_language_id = MagicMock(**{'return_value': 10})
        importer.process_books = MagicMock()
        importer.stop_import_flag = True

        # WHEN: Calling do_import
        result = importer.do_import()

        # THEN: do_import should return False and process_books should have not been called
        self.assertFalse(result)
        self.assertTrue(importer.application.process_events.called)

        self.assertTrue(importer.application.process_events.called)

    @patch('openlp.plugins.bibles.lib.importers.opensong.log')
    def do_import_completes_test(self, mocked_log):
        """
        Test do_import when it completes successfully
        """
        # GIVEN: An instance of OpenSongBible and stop_import_flag set to True
        importer = OpenSongBible(MagicMock(), path='.', name='.', filename='')
        importer.validate_file = MagicMock()
        importer.parse_xml = MagicMock()
        importer.get_language_id = MagicMock(**{'return_value': 10})
        importer.process_books = MagicMock()
        importer.stop_import_flag = False

        # WHEN: Calling do_import
        result = importer.do_import()

        # THEN: do_import should return True
        self.assertTrue(result)

    def test_file_import(self):
        """
        Test the actual import of OpenSong Bible file
        """
        # GIVEN: Test files with a mocked out "manager", "import_wizard", and mocked functions
        #       get_book_ref_id_by_name, create_verse, create_book, session and get_language.
        result_file = open(os.path.join(TEST_PATH, 'dk1933.json'), 'rb')
        test_data = json.loads(result_file.read().decode())
        bible_file = 'opensong-dk1933.xml'
        with patch('openlp.plugins.bibles.lib.importers.opensong.OpenSongBible.application'):
            mocked_manager = MagicMock()
            mocked_import_wizard = MagicMock()
            importer = OpenSongBible(mocked_manager, path='.', name='.', filename='')
            importer.wizard = mocked_import_wizard
            importer.get_book_ref_id_by_name = MagicMock()
            importer.create_verse = MagicMock()
            importer.create_book = MagicMock()
            importer.session = MagicMock()
            importer.get_language = MagicMock()
            importer.get_language.return_value = 'Danish'

            # WHEN: Importing bible file
            importer.filename = os.path.join(TEST_PATH, bible_file)
            importer.do_import()

            # THEN: The create_verse() method should have been called with each verse in the file.
            self.assertTrue(importer.create_verse.called)
            for verse_tag, verse_text in test_data['verses']:
                importer.create_verse.assert_any_call(importer.create_book().id, 1, int(verse_tag), verse_text)