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# -*- coding: utf-8 -*-

__license__ = 'GPL 3'
__copyright__ = '2009, John Schember <john@nachtimwald.com>'
__docformat__ = 'restructuredtext en'

import os, re, time, sys

from calibre.ebooks.metadata import MetaInformation
from calibre.devices.mime import mime_type_ext
from calibre.devices.interface import BookList as _BookList
from calibre.constants import filesystem_encoding, preferred_encoding
from calibre import isbytestring
from calibre.utils.config import prefs

class Book(MetaInformation):

    BOOK_ATTRS = ['lpath', 'size', 'mime', 'device_collections', '_new_book']

    JSON_ATTRS = [
        'lpath', 'title', 'authors', 'mime', 'size', 'tags', 'author_sort',
        'title_sort', 'comments', 'category', 'publisher', 'series',
        'series_index', 'rating', 'isbn', 'language', 'application_id',
        'book_producer', 'lccn', 'lcc', 'ddc', 'rights', 'publication_type',

    def __init__(self, prefix, lpath, size=None, other=None):
        from calibre.ebooks.metadata.meta import path_to_ext

        MetaInformation.__init__(self, '')

        self._new_book = False
        self.device_collections = []
        self.path = os.path.join(prefix, lpath)
        if os.sep == '\\':
            self.path = self.path.replace('/', '\\')
            self.lpath = lpath.replace('\\', '/')
            self.lpath = lpath
        self.mime = mime_type_ext(path_to_ext(lpath))
        self.size = size # will be set later if None
            self.datetime = time.gmtime(os.path.getctime(self.path))
            self.datetime = time.gmtime()
        if other:

    def __eq__(self, other):
        # use lpath because the prefix can change, changing path
        return self.lpath == getattr(other, 'lpath', None)

    def db_id(self):
        doc = '''The database id in the application database that this file corresponds to'''
        def fget(self):
            match = re.search(r'_(\d+)$', self.lpath.rpartition('.')[0])
            if match:
                return int(match.group(1))
            return None
        return property(fget=fget, doc=doc)

    def title_sorter(self):
        doc = '''String to sort the title. If absent, title is returned'''
        def fget(self):
            return re.sub('^\s*A\s+|^\s*The\s+|^\s*An\s+', '', self.title).rstrip()
        return property(doc=doc, fget=fget)

    def thumbnail(self):
        return None

    def smart_update(self, other):
        Merge the information in C{other} into self. In case of conflicts, the information
        in C{other} takes precedence, unless the information in C{other} is NULL.

        MetaInformation.smart_update(self, other, replace_tags=True)

        for attr in self.BOOK_ATTRS:
            if hasattr(other, attr):
                val = getattr(other, attr, None)
                setattr(self, attr, val)

    def to_json(self):
        json = {}
        for attr in self.JSON_ATTRS:
            val = getattr(self, attr)
            if isbytestring(val):
                enc = filesystem_encoding if attr == 'lpath' else preferred_encoding
                val = val.decode(enc, 'replace')
            elif isinstance(val, (list, tuple)):
                val = [x.decode(preferred_encoding, 'replace') if
                        isbytestring(x) else x for x in val]
            json[attr] = val
        return json

class BookList(_BookList):

    def __init__(self, oncard, prefix, settings):
        _BookList.__init__(self, oncard, prefix, settings)
        self._bookmap = {}

    def supports_collections(self):
        return False

    def add_book(self, book, replace_metadata):
            b = self.index(book)
        except (ValueError, IndexError):
            b = None
        if b is None:
            return True
        if replace_metadata:
            return True
        return False

    def remove_book(self, book):

    def get_collections(self):
        return {}

class CollectionsBookList(BookList):

    def supports_collections(self):
        return True

    def get_collections(self, collection_attributes):
        collections = {}
        series_categories = set([])
        # This map of sets is used to avoid linear searches when testing for
        # book equality
        collections_lpaths = {}
        for book in self:
            # Make sure we can identify this book via the lpath
            lpath = getattr(book, 'lpath', None)
            if lpath is None:
            # Decide how we will build the collections. The default: leave the
            # book in all existing collections. Do not add any new ones.
            attrs = ['device_collections']
            if getattr(book, '_new_book', False):
                if prefs['preserve_user_collections']:
                    # Ensure that the book is in all the book's existing
                    # collections plus all metadata collections
                    attrs += collection_attributes
                    # The book's existing collections are ignored. Put the book
                    # in collections defined by its metadata.
                    attrs = collection_attributes
            for attr in attrs:
                attr = attr.strip()
                val = getattr(book, attr, None)
                if not val: continue
                if isbytestring(val):
                    val = val.decode(preferred_encoding, 'replace')
                if isinstance(val, (list, tuple)):
                    val = list(val)
                elif isinstance(val, unicode):
                    val = [val]
                for category in val:
                    if attr == 'tags' and len(category) > 1 and \
                            category[0] == '[' and category[-1] == ']':
                    if category not in collections:
                        collections[category] = []
                        collections_lpaths[category] = set()
                    if lpath not in collections_lpaths[category]:
                    if attr == 'series':
        # Sort collections
        for category, books in collections.items():
            def tgetter(x):
                return getattr(x, 'title_sort', 'zzzz')
            books.sort(cmp=lambda x,y:cmp(tgetter(x), tgetter(y)))
            if category in series_categories:
                # Ensures books are sub sorted by title
                def getter(x):
                    return getattr(x, 'series_index', sys.maxint)
                books.sort(cmp=lambda x,y:cmp(getter(x), getter(y)))
        return collections

    def rebuild_collections(self, booklist, oncard):
        For each book in the booklist for the card oncard, remove it from all
        its current collections, then add it to the collections specified in

        oncard is None for the main memory, carda for card A, cardb for card B,

        booklist is the object created by the :method:`books` call above.

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