"""
Models for Book

Series -> Work -> Edition

Series is not fully implemented at the moment

Goodreads
Famous works have many editions

Google Books:
only has Edition level ("volume") data

Douban:
old editions has only CUBN(Chinese Unified Book Number)
work data seems asymmetric (a book links to a work, but may not listed in that work as one of its editions)

"""

from django.db import models
from django.utils.translation import gettext_lazy as _
from catalog.common import *
from .utils import *


class Edition(Item):
    category = ItemCategory.Book
    isbn = PrimaryLookupIdDescriptor(IdType.ISBN)
    asin = PrimaryLookupIdDescriptor(IdType.ASIN)
    cubn = PrimaryLookupIdDescriptor(IdType.CUBN)
    # douban_book = LookupIdDescriptor(IdType.DoubanBook)
    # goodreads = LookupIdDescriptor(IdType.Goodreads)
    languages = jsondata.ArrayField(_("语言"), null=True, blank=True, default=list)
    publish_year = jsondata.IntegerField(_("发表年份"), null=True, blank=True)
    publish_month = jsondata.IntegerField(_("发表月份"), null=True, blank=True)
    pages = jsondata.IntegerField(blank=True, default=None)
    authors = jsondata.ArrayField(_('作者'), null=False, blank=False, default=list)
    translaters = jsondata.ArrayField(_('译者'), null=True, blank=True, default=list)
    publishers = jsondata.ArrayField(_('出版方'), null=True, blank=True, default=list)

    @property
    def isbn10(self):
        return isbn_13_to_10(self.isbn)

    @isbn10.setter
    def isbn10(self, value):
        self.isbn = isbn_10_to_13(value)

    def update_linked_items_from_external_resource(self, resource):
        """add Work from resource.metadata['work'] if not yet"""
        links = resource.required_resources + resource.related_resources
        for w in links:
            if w['model'] == 'Work':
                work = Work.objects.filter(primary_lookup_id_type=w['id_type'], primary_lookup_id_value=w['id_value']).first()
                if work and work not in self.works.all():
                    self.works.add(work)
                # if not work:
                #     _logger.info(f'Unable to find link for {w["url"]}')


class Work(Item):
    category = ItemCategory.Book
    douban_work = PrimaryLookupIdDescriptor(IdType.DoubanBook_Work)
    goodreads_work = PrimaryLookupIdDescriptor(IdType.Goodreads_Work)
    editions = models.ManyToManyField(Edition, related_name='works')


class Series(Item):
    category = ItemCategory.Book
    # douban_serie = LookupIdDescriptor(IdType.DoubanBook_Serie)
    # goodreads_serie = LookupIdDescriptor(IdType.Goodreads_Serie)

    class Meta:
        proxy = True