#!/usr/bin/env python

# pip install requests
# pip install Markdown

import os
import io
import sys
import subprocess
import requests
import json
import markdown
from datetime import datetime
from string import Template

SIGN_UPDATE = './bin/sign_update'
PRIVATE_KEY_PATH = os.path.expanduser('~/Projects/sparkle_priv.pem')
GITHUB_TOKEN_PATH = os.path.expanduser('~/.config/github.qvacua.release.token')

file_path = sys.argv[1]
bundle_version = sys.argv[2]
marketing_version = sys.argv[3]
tag_name = sys.argv[4]
is_snapshot = True if len(sys.argv) > 5 and sys.argv[5] == "true" else False

file_size = os.stat(file_path).st_size
file_signature = subprocess.check_output([SIGN_UPDATE, file_path, PRIVATE_KEY_PATH]).strip()

appcast_template_file = open('resources/appcast_template.xml', 'r')
appcast_template = Template(appcast_template_file.read())
appcast_template_file.close()

token_file = open(GITHUB_TOKEN_PATH, 'r')
token = token_file.read().strip()
token_file.close()

release_response = requests.get('https://api.github.com/repos/qvacua/vimr/releases/tags/{0}'.format(tag_name),
                                params={'access_token': token})
release_json = json.loads(release_response.content)

title = release_json['name']
download_url = release_json['assets'][0]['browser_download_url']
release_notes_url = release_json['html_url']
release_notes = release_json['body']

appcast = appcast_template.substitute(
    title=title,
    release_notes=markdown.markdown(release_notes),
    release_notes_link=release_notes_url,
    publication_date=datetime.now().isoformat(),
    file_url=download_url,
    bundle_version=bundle_version,
    marketing_version=marketing_version,
    file_length=file_size,
    signature=file_signature
)

appcast_file_name = 'appcast_snapshot.xml' if is_snapshot else 'appcast.xml'

with io.open('build/Release/{0}'.format(appcast_file_name), 'w+') as appcast_file:
    appcast_file.write(appcast)