''' handle reading a csv from librarything '''
import csv
import re
import math

from bookwyrm import models
from bookwyrm.models import ImportItem
from bookwyrm.importer import Importer


class LibrarythingImporter(Importer):
    service = 'LibraryThing'
    delimiter = '\t'
    encoding = 'ISO-8859-1'
    # mandatory_fields : fields matching the book title and author
    mandatory_fields = ['Title', 'Primary Author']

    def parse_fields(self, initial):
        data = {}
        data['import_source']   = self.service
        data['Book Id'] = initial['Book Id']
        data['Title'] = initial['Title']
        data['Author'] = initial['Primary Author']
        data['ISBN13'] = initial['ISBN']
        data['My Review'] = initial['Review']
        if initial['Rating']:
            data['My Rating'] = math.ceil(float(initial['Rating']))
        else:
            data['My Rating'] = ''
        data['Date Added'] = re.sub('\[|\]', '', initial['Entry Date'])
        data['Date Started'] = re.sub('\[|\]', '', initial['Date Started'])
        data['Date Read'] = re.sub('\[|\]', '', initial['Date Read'])

        data['Exclusive Shelf'] = None
        if data['Date Read']:
            data['Exclusive Shelf'] = "read"
        elif data['Date Started']:
            data['Exclusive Shelf'] = "reading"
        else:
            data['Exclusive Shelf'] = "to-read"

        return data