"""A class to encapsulate the ComicBookInfo data"""

# Copyright 2012-2014 Anthony Beville

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import json
from datetime import datetime
#import zipfile

from .genericmetadata import GenericMetadata
from . import utils
#import ctversion


class ComicBookInfo:
    def metadataFromString(self, string):
        class Default(dict):
            def __missing__(self, key):
                return None
        cbi_container = json.loads(str(string, 'utf-8'))

        metadata = GenericMetadata()

        cbi = Default(cbi_container['ComicBookInfo/1.0'])

        metadata.series = utils.xlate(cbi['series'])
        metadata.title = utils.xlate(cbi['title'])
        metadata.issue = utils.xlate(cbi['issue'])
        metadata.publisher = utils.xlate(cbi['publisher'])
        metadata.month = utils.xlate(cbi['publicationMonth'], True)
        metadata.year = utils.xlate(cbi['publicationYear'], True)
        metadata.seriesYear = utils.xlate('seriesPublicationYear', True)
        metadata.issueCount = utils.xlate(cbi['numberOfIssues'], True)
        metadata.comments = utils.xlate(cbi['comments'])
        metadata.genre = utils.xlate(cbi['genre'])
        metadata.volume = utils.xlate(cbi['volume'], True)
        metadata.volumeCount = utils.xlate(cbi['numberOfVolumes'], True)
        metadata.language = utils.xlate(cbi['language'])
        metadata.country = utils.xlate(cbi['country'])
        metadata.criticalRating = utils.xlate(cbi['rating'])

        metadata.credits = cbi['credits']
        metadata.tags = cbi['tags']

        # make sure credits and tags are at least empty lists and not None
        if metadata.credits is None:
            metadata.credits = []
        if metadata.tags is None:
            metadata.tags = []

        # need to massage the language string to be ISO
        if metadata.language is not None:
            # reverse look-up
            pattern = metadata.language
            metadata.language = None
            for key in utils.getLanguageDict():
                if utils.getLanguageDict()[key] == pattern.encode('utf-8'):
                    metadata.language = key
                    break

        metadata.isEmpty = False

        return metadata

    def stringFromMetadata(self, metadata):

        cbi_container = self.createJSONDictionary(metadata)
        return json.dumps(cbi_container)

    def validateString(self, string):
        """Verify that the string actually contains CBI data in JSON format"""

        try:
            cbi_container = json.loads(string)
        except:
            return False

        return ('ComicBookInfo/1.0' in cbi_container)

    def createJSONDictionary(self, metadata):
        """Create the dictionary that we will convert to JSON text"""

        cbi = dict()
        cbi_container = {'appID': 'ComicTagger/' + '1.0.0',  # ctversion.version,
                         'lastModified': str(datetime.now()),
                         'ComicBookInfo/1.0': cbi}

        # helper func
        def assign(cbi_entry, md_entry):
            if md_entry is not None or isinstance(md_entry, str) and md_entry != "":
                cbi[cbi_entry] = md_entry

        assign('series', utils.xlate(metadata.series))
        assign('title', utils.xlate(metadata.title))
        assign('issue', utils.xlate(metadata.issue))
        assign('publisher', utils.xlate(metadata.publisher))
        assign('publicationMonth', utils.xlate(metadata.month, True))
        assign('publicationYear', utils.xlate(metadata.year, True))
        assign('seriesPublicationYear', utils.xlate(metadata.seriesYear, True))
        assign('numberOfIssues', utils.xlate(metadata.issueCount, True))
        assign('comments', utils.xlate(metadata.comments))
        assign('genre', utils.xlate(metadata.genre))
        assign('volume', utils.xlate(metadata.volume, True))
        assign('numberOfVolumes', utils.xlate(metadata.volumeCount, True))
        assign('language', utils.xlate(utils.getLanguageFromISO(metadata.language)))
        assign('country', utils.xlate(metadata.country))
        assign('rating', utils.xlate(metadata.criticalRating))
        assign('credits', metadata.credits)
        assign('tags', metadata.tags)

        return cbi_container

    def writeToExternalFile(self, filename, metadata):

        cbi_container = self.createJSONDictionary(metadata)

        f = open(filename, 'w')
        f.write(json.dumps(cbi_container, indent=4))
        f.close