"""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
import utils
#import ctversion


class ComicBookInfo:

    def metadataFromString(self, string):

        cbi_container = json.loads(unicode(string, 'utf-8'))

        metadata = GenericMetadata()

        cbi = cbi_container['ComicBookInfo/1.0']

        # helper func
        # If item is not in CBI, return None
        def xlate(cbi_entry):
            if cbi_entry in cbi:
                return cbi[cbi_entry]
            else:
                return None

        metadata.series = xlate('series')
        metadata.title = xlate('title')
        metadata.issue = xlate('issue')
        metadata.publisher = xlate('publisher')
        metadata.month = xlate('publicationMonth')
        metadata.year = xlate('publicationYear')
        metadata.issueCount = xlate('numberOfIssues')
        metadata.comments = xlate('comments')
        metadata.credits = xlate('credits')
        metadata.genre = xlate('genre')
        metadata.volume = xlate('volume')
        metadata.volumeCount = xlate('numberOfVolumes')
        metadata.language = xlate('language')
        metadata.country = xlate('country')
        metadata.criticalRating = xlate('rating')
        metadata.tags = xlate('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:
                cbi[cbi_entry] = md_entry

        # helper func
        def toInt(s):
            i = None
            if type(s) in [str, unicode, int]:
                try:
                    i = int(s)
                except ValueError:
                    pass
            return i

        assign('series', metadata.series)
        assign('title', metadata.title)
        assign('issue', metadata.issue)
        assign('publisher', metadata.publisher)
        assign('publicationMonth', toInt(metadata.month))
        assign('publicationYear', toInt(metadata.year))
        assign('numberOfIssues', toInt(metadata.issueCount))
        assign('comments', metadata.comments)
        assign('genre', metadata.genre)
        assign('volume', toInt(metadata.volume))
        assign('numberOfVolumes', toInt(metadata.volumeCount))
        assign('language', utils.getLanguageFromISO(metadata.language))
        assign('country', metadata.country)
        assign('rating', 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