#!/usr/bin/env python2
# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:fdm=marker:ai
from __future__ import (unicode_literals, division, absolute_import,
                        print_function)

__license__   = 'GPL v3'
__copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
__docformat__ = 'restructuredtext en'

import os, glob
from io import BytesIO
from tempfile import NamedTemporaryFile
from datetime import timedelta

from calibre.db.tests.base import BaseTest, IMG
from calibre.ptempfile import PersistentTemporaryFile
from calibre.utils.date import now, UNDEFINED_DATE

def import_test(replacement_data, replacement_fmt=None):
    def func(path, fmt):
        if not path.endswith('.'+fmt.lower()):
            raise AssertionError('path extension does not match format')
        ext = (replacement_fmt or fmt).lower()
        with PersistentTemporaryFile('.'+ext) as f:
            f.write(replacement_data)
        return f.name
    return func

class AddRemoveTest(BaseTest):

    def test_add_format(self):  # {{{
        'Test adding formats to an existing book record'
        af, ae, at = self.assertFalse, self.assertEqual, self.assertTrue

        cache = self.init_cache()
        table = cache.fields['formats'].table
        NF = b'test_add_formatxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

        # Test that replace=False works
        previous = cache.format(1, 'FMT1')
        af(cache.add_format(1, 'FMT1', BytesIO(NF), replace=False))
        ae(previous, cache.format(1, 'FMT1'))

        # Test that replace=True works
        lm = cache.field_for('last_modified', 1)
        at(cache.add_format(1, 'FMT1', BytesIO(NF), replace=True))
        ae(NF, cache.format(1, 'FMT1'))
        ae(cache.format_metadata(1, 'FMT1')['size'], len(NF))
        at(cache.field_for('size', 1) >= len(NF))
        at(cache.field_for('last_modified', 1) > lm)
        ae(('FMT2','FMT1'), cache.formats(1))
        at(1 in table.col_book_map['FMT1'])

        # Test adding a format to a record with no formats
        at(cache.add_format(3, 'FMT1', BytesIO(NF), replace=True))
        ae(NF, cache.format(3, 'FMT1'))
        ae(cache.format_metadata(3, 'FMT1')['size'], len(NF))
        ae(('FMT1',), cache.formats(3))
        at(3 in table.col_book_map['FMT1'])
        at(cache.add_format(3, 'FMTX', BytesIO(NF), replace=True))
        at(3 in table.col_book_map['FMTX'])
        ae(('FMT1','FMTX'), cache.formats(3))

        # Test running on import plugins
        import calibre.db.cache as c
        orig = c.run_plugins_on_import
        try:
            c.run_plugins_on_import = import_test(b'replacement data')
            at(cache.add_format(3, 'REPL', BytesIO(NF)))
            ae(b'replacement data', cache.format(3, 'REPL'))
            c.run_plugins_on_import = import_test(b'replacement data2', 'REPL2')
            with NamedTemporaryFile(suffix='_test_add_format.repl') as f:
                f.write(NF)
                f.seek(0)
                at(cache.add_format(3, 'REPL', BytesIO(NF)))
                ae(b'replacement data', cache.format(3, 'REPL'))
                ae(b'replacement data2', cache.format(3, 'REPL2'))

        finally:
            c.run_plugins_on_import = orig

        # Test adding FMT with path
        with NamedTemporaryFile(suffix='_test_add_format.fmt9') as f:
            f.write(NF)
            f.seek(0)
            at(cache.add_format(2, 'FMT9', f))
            ae(NF, cache.format(2, 'FMT9'))
            ae(cache.format_metadata(2, 'FMT9')['size'], len(NF))
            at(cache.field_for('size', 2) >= len(NF))
            at(2 in table.col_book_map['FMT9'])

        del cache
        # Test that the old interface also shows correct format data
        db = self.init_old()
        ae(db.formats(3, index_is_id=True), ','.join(['FMT1', 'FMTX', 'REPL', 'REPL2']))
        ae(db.format(3, 'FMT1', index_is_id=True), NF)
        ae(db.format(1, 'FMT1', index_is_id=True), NF)

        db.close()
        del db

    # }}}

    def test_remove_formats(self):  # {{{
        'Test removal of formats from book records'
        af, ae, at = self.assertFalse, self.assertEqual, self.assertTrue

        cache = self.init_cache()

        # Test removal of non-existing format does nothing
        formats = {bid:tuple(cache.formats(bid)) for bid in (1, 2, 3)}
        cache.remove_formats({1:{'NF'}, 2:{'NF'}, 3:{'NF'}})
        nformats = {bid:tuple(cache.formats(bid)) for bid in (1, 2, 3)}
        ae(formats, nformats)

        # Test full removal of format
        af(cache.format(1, 'FMT1') is None)
        at(cache.has_format(1, 'FMT1'))
        ap = cache.format_abspath(1, 'FMT1')
        at(os.path.exists(ap))
        cache.remove_formats({1:{'FMT1'}})
        at(cache.format(1, 'FMT1') is None)
        af(bool(cache.format_metadata(1, 'FMT1')))
        af(bool(cache.format_metadata(1, 'FMT1', allow_cache=False)))
        af('FMT1' in cache.formats(1))
        af(cache.has_format(1, 'FMT1'))
        af(os.path.exists(ap))

        # Test db only removal
        at(cache.has_format(1, 'FMT2'))
        ap = cache.format_abspath(1, 'FMT2')
        if ap and os.path.exists(ap):
            cache.remove_formats({1:{'FMT2'}}, db_only=True)
            af(bool(cache.format_metadata(1, 'FMT2')))
            af(cache.has_format(1, 'FMT2'))
            at(os.path.exists(ap))

        # Test that the old interface agrees
        db = self.init_old()
        at(db.format(1, 'FMT1', index_is_id=True) is None)

        db.close()
        del db
    # }}}

    def test_create_book_entry(self):  # {{{
        'Test the creation of new book entries'
        from calibre.ebooks.metadata.book.base import Metadata
        cache = self.init_cache()
        mi = Metadata('Created One', authors=('Creator One', 'Creator Two'))

        book_id = cache.create_book_entry(mi)
        self.assertIsNot(book_id, None)

        def do_test(cache, book_id):
            for field in ('path', 'uuid', 'author_sort', 'timestamp', 'pubdate', 'title', 'authors', 'series_index', 'sort'):
                self.assertTrue(cache.field_for(field, book_id))
            for field in ('size', 'cover'):
                self.assertFalse(cache.field_for(field, book_id))
            self.assertEqual(book_id, cache.fields['uuid'].table.uuid_to_id_map[cache.field_for('uuid', book_id)])
            self.assertLess(now() - cache.field_for('timestamp', book_id), timedelta(seconds=30))
            self.assertEqual(('Created One', ('Creator One', 'Creator Two')), (cache.field_for('title', book_id), cache.field_for('authors', book_id)))
            self.assertEqual(cache.field_for('series_index', book_id), 1.0)
            self.assertEqual(cache.field_for('pubdate', book_id), UNDEFINED_DATE)

        do_test(cache, book_id)
        # Test that the db contains correct data
        cache = self.init_cache()
        do_test(cache, book_id)

        self.assertIs(None, cache.create_book_entry(mi, add_duplicates=False), 'Duplicate added incorrectly')
        book_id = cache.create_book_entry(mi, cover=IMG)
        self.assertIsNot(book_id, None)
        self.assertEqual(IMG, cache.cover(book_id))

        import calibre.db.cache as c
        orig = c.prefs
        c.prefs = {'new_book_tags':('newbook', 'newbook2')}
        try:
            book_id = cache.create_book_entry(mi)
            self.assertEqual(('newbook', 'newbook2'), cache.field_for('tags', book_id))
            mi.tags = ('one', 'two')
            book_id = cache.create_book_entry(mi)
            self.assertEqual(('one', 'two') + ('newbook', 'newbook2'), cache.field_for('tags', book_id))
            mi.tags = ()
        finally:
            c.prefs = orig

        mi.uuid = 'a preserved uuid'
        book_id = cache.create_book_entry(mi, preserve_uuid=True)
        self.assertEqual(mi.uuid, cache.field_for('uuid', book_id))
    # }}}

    def test_add_books(self):  # {{{
        'Test the adding of new books'
        from calibre.ebooks.metadata.book.base import Metadata
        cache = self.init_cache()
        mi = Metadata('Created One', authors=('Creator One', 'Creator Two'))
        FMT1, FMT2 = b'format1', b'format2'
        format_map = {'FMT1':BytesIO(FMT1), 'FMT2':BytesIO(FMT2)}
        ids, duplicates = cache.add_books([(mi, format_map)])
        self.assertTrue(len(ids) == 1)
        self.assertFalse(duplicates)
        book_id = ids[0]
        self.assertEqual(set(cache.formats(book_id)), {'FMT1', 'FMT2'})
        self.assertEqual(cache.format(book_id, 'FMT1'), FMT1)
        self.assertEqual(cache.format(book_id, 'FMT2'), FMT2)
    # }}}

    def test_remove_books(self):  # {{{
        'Test removal of books'
        cl = self.cloned_library
        cache = self.init_cache()
        af, ae, at = self.assertFalse, self.assertEqual, self.assertTrue
        authors = cache.fields['authors'].table

        # Delete a single book, with no formats and check cleaning
        self.assertIn(_('Unknown'), set(authors.id_map.itervalues()))
        olen = len(authors.id_map)
        item_id = {v:k for k, v in authors.id_map.iteritems()}[_('Unknown')]
        cache.remove_books((3,))
        for c in (cache, self.init_cache()):
            table = c.fields['authors'].table
            self.assertNotIn(3, c.all_book_ids())
            self.assertNotIn(_('Unknown'), set(table.id_map.itervalues()))
            self.assertNotIn(item_id, table.asort_map)
            self.assertNotIn(item_id, table.alink_map)
            ae(len(table.id_map), olen-1)

        # Check that files are removed
        fmtpath = cache.format_abspath(1, 'FMT1')
        bookpath = os.path.dirname(fmtpath)
        authorpath = os.path.dirname(bookpath)
        item_id = {v:k for k, v in cache.fields['#series'].table.id_map.iteritems()}['My Series Two']
        cache.remove_books((1,), permanent=True)
        for x in (fmtpath, bookpath, authorpath):
            af(os.path.exists(x), 'The file %s exists, when it should not' % x)
        for c in (cache, self.init_cache()):
            table = c.fields['authors'].table
            self.assertNotIn(1, c.all_book_ids())
            self.assertNotIn('Author Two', set(table.id_map.itervalues()))
            self.assertNotIn(6, set(c.fields['rating'].table.id_map.itervalues()))
            self.assertIn('A Series One', set(c.fields['series'].table.id_map.itervalues()))
            self.assertNotIn('My Series Two', set(c.fields['#series'].table.id_map.itervalues()))
            self.assertNotIn(item_id, c.fields['#series'].table.col_book_map)
            self.assertNotIn(1, c.fields['#series'].table.book_col_map)

        # Test emptying the db
        cache.remove_books(cache.all_book_ids(), permanent=True)
        for f in ('authors', 'series', '#series', 'tags'):
            table = cache.fields[f].table
            self.assertFalse(table.id_map)
            self.assertFalse(table.book_col_map)
            self.assertFalse(table.col_book_map)

        # Test the delete service
        from calibre.db.delete_service import delete_service
        cache = self.init_cache(cl)
        # Check that files are removed
        fmtpath = cache.format_abspath(1, 'FMT1')
        bookpath = os.path.dirname(fmtpath)
        authorpath = os.path.dirname(bookpath)
        item_id = {v:k for k, v in cache.fields['#series'].table.id_map.iteritems()}['My Series Two']
        cache.remove_books((1,))
        delete_service().wait()
        for x in (fmtpath, bookpath, authorpath):
            af(os.path.exists(x), 'The file %s exists, when it should not' % x)

    # }}}

    def test_original_fmt(self):  # {{{
        ' Test management of original fmt '
        af, ae, at = self.assertFalse, self.assertEqual, self.assertTrue
        db = self.init_cache()
        fmts = db.formats(1)
        af(db.has_format(1, 'ORIGINAL_FMT1'))
        at(db.save_original_format(1, 'FMT1'))
        at(db.has_format(1, 'ORIGINAL_FMT1'))
        raw = db.format(1, 'FMT1')
        ae(raw, db.format(1, 'ORIGINAL_FMT1'))
        db.add_format(1, 'FMT1', BytesIO(b'replacedfmt'))
        self.assertNotEqual(db.format(1, 'FMT1'), db.format(1, 'ORIGINAL_FMT1'))
        at(db.restore_original_format(1, 'ORIGINAL_FMT1'))
        ae(raw, db.format(1, 'FMT1'))
        af(db.has_format(1, 'ORIGINAL_FMT1'))
        ae(set(fmts), set(db.formats(1, verify_formats=False)))
    # }}}

    def test_format_orphan(self):  # {{{
        ' Test that adding formats does not create orphans if the file name algorithm changes '
        cache = self.init_cache()
        path = cache.format_abspath(1, 'FMT1')
        base, name = os.path.split(path)
        prefix = 'mushroomxx'
        os.rename(path, os.path.join(base, prefix + name))
        cache.fields['formats'].table.fname_map[1]['FMT1'] = prefix + os.path.splitext(name)[0]
        old = glob.glob(os.path.join(base, '*.fmt1'))
        cache.add_format(1, 'FMT1', BytesIO(b'xxxx'), run_hooks=False)
        new = glob.glob(os.path.join(base, '*.fmt1'))
        self.assertNotEqual(old, new)
        self.assertEqual(len(old), len(new))
        self.assertNotIn(prefix, cache.fields['formats'].format_fname(1, 'FMT1'))
    # }}}
