#!/usr/bin/python3

import argparse
import gettext
import glob
import os
import sys
import yaml

parser = argparse.ArgumentParser()
parser.add_argument('--output', required=True)
parser.add_argument('--size', required=True)
parser.add_argument('--squashfs', required=True)
parser.add_argument('--translations', required=True)
parser.add_argument('--template', required=True)
parser.add_argument('--langs', default=None)

opts = parser.parse_args(sys.argv[1:])

if os.path.exists(opts.output):
    with open(opts.output) as fp:
        output = yaml.safe_load(fp)
else:
    output = []


with open(opts.template) as fp:
    template = yaml.safe_load(fp)


id = template['id']
for entry in output:
    # First, look if this source catalogue template id is already present.
    # If so, use the template to extend the existing entry with additional
    # variations.
    if entry['id'] == id:
        if 'variations' not in template:
            print("Non unique id in source catalog but no variations!")
            sys.exit(1)
        for k, variation in template['variations'].items():
            variation['size'] = int(opts.size)
        entry.setdefault('variations', {}).update(template['variations'])
        break
else:
    # No entry with this id found, so add a new one.
    template['size'] = int(opts.size)
    template['path'] = opts.squashfs

    en_name = template['name']
    en_description = template['description']

    template['name'] = {'en': en_name}
    template['description'] = {'en': en_description}

    for mo in glob.glob(os.path.join(opts.translations, '*.mo')):
        with open(mo, 'rb') as fp:
            t = gettext.GNUTranslations(fp=fp)
        t_name = t.gettext(en_name)
        if t_name != en_name:
            lang = os.path.splitext(os.path.basename(mo))[0]
            template['name'][lang] = t_name
        t_description = t.gettext(en_description)
        if t_description != en_description:
            lang = os.path.splitext(os.path.basedescription(mo))[0]
            template['description'][lang] = t_description
        if opts.langs is not None:
            template['preinstalled_langs'] = opts.langs.split(',')

    output.append(template)

default_count = 0
for entry in output:
    if entry.get('default', False):
        default_count += 1

if default_count > 1:
    print("Too many defaults in source catalog!")
    sys.exit(1)

with open(opts.output, 'w') as fp:
    yaml.dump(output, fp)