"""
import_old_videos.py - For importing video data from the older version of this
website.

"""
import datetime
import json

from django.core.management.base import LabelCommand
from django.utils.html import linebreaks

from videos.models import Collection, Video


class Command(LabelCommand):
    args = '<filename filename ...>'
    help = 'Imports older video & video sets in JSON format'

    collections = {}

    def handle_label(self, filename, **options):
        """
        Process the file of older video & video sets in JSON. Convert to the new
        model scheme.

        """
        with open(filename, 'rb') as f:
            items = json.load(f)

        for item in items:
            if item['model'] == 'band.video_set':
                self.process_set(item)

        for item in items:
            if item['model'] == 'band.video':
                self.process_video(item)

    def process_set(self, item):

        fields = item['fields']

        description = linebreaks(fields['text'].strip())

        # there are several sets with the same date, so to get the ordering
        # right, add the pk as seconds.

        date_added = datetime.datetime.strptime(fields['date'], '%Y-%m-%d')
        date_added += datetime.timedelta(seconds=int(item['pk']))

        coll = Collection(
                id=item['pk'],
                title=fields['title'].strip(),
                date_added=date_added,
                description=description)

        coll.save()
        self.collections[coll.pk] = coll

    def process_video(self, item):

        fields = item['fields']

        video = Video(
                id=item['pk'],
                title=fields['title'].strip(),
                embed_code=fields['embed_code'],
                collection=self.collections[fields['video_set']],
                )
        video.save()