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#
# Copyright (c) 2014 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.
import argparse
import getpass

import os
import os.path
import crochet
from flask import Flask
from pixelated.adapter.pixelated_mail_sender import PixelatedMailSender
from pixelated.adapter.pixelated_mailboxes import PixelatedMailBoxes
import pixelated.reactor_manager as reactor_manager
import pixelated.bitmask_libraries.session as LeapSession
from pixelated.bitmask_libraries.config import LeapConfig
from pixelated.bitmask_libraries.provider import LeapProvider
from pixelated.bitmask_libraries.auth import LeapAuthenticator, LeapCredentials
from pixelated.adapter.mail_service import MailService
from pixelated.adapter.pixelated_mail import PixelatedMail
from pixelated.adapter.soledad_querier import SoledadQuerier
from pixelated.adapter.search import SearchEngine
from pixelated.adapter.draft_service import DraftService
from pixelated.adapter.listener import MailboxListener
from pixelated.controllers import *
from pixelated.adapter.tag_service import TagService


static_folder = os.path.abspath(os.path.join(os.path.abspath(__file__), "..", "..", "web-ui", "app"))

# this is a workaround for packaging
if not os.path.exists(static_folder):
    static_folder = os.path.abspath(os.path.join(os.path.abspath(__file__), "..", "..", "..", "web-ui", "app"))
if not os.path.exists(static_folder):
    static_folder = os.path.join('/', 'usr', 'share', 'pixelated-user-agent')
app = Flask(__name__, static_url_path='', static_folder=static_folder)
DISABLED_FEATURES = ['draftReply', 'signatureStatus', 'encryptionStatus', 'contacts']


def respond_json(entity, status_code=200):
    json_response = json.dumps(entity)
    response = Response(response=json_response, mimetype="application/json")
    response.status_code = status_code
    return response


@app.route('/features')
def features():
    try:
        disabled_features = {'logout': os.environ['DISPATCHER_LOGOUT_URL']}
    except KeyError:
        disabled_features = {}
    return respond_json({'disabled_features': DISABLED_FEATURES, 'dispatcher_features': disabled_features})


def register_new_user(username):
    server_name = app.config['LEAP_SERVER_NAME']
    certs_home = os.path.abspath(os.path.join(os.path.abspath(__file__), "..", "certificates"))
    config = LeapConfig(certs_home=certs_home)
    provider = LeapProvider(server_name, config)
    password = getpass.getpass('Please enter password for %s: ' % username)
    LeapAuthenticator(provider).register(LeapCredentials(username, password))
    session = LeapSession.open(username, password, server_name)
    session.nicknym.generate_openpgp_key()


def _setup_routes(app, home_controller, mails_controller, tags_controller):
    # home
    app.add_url_rule('/', methods=['GET'], view_func=home_controller.home)
    # mails
    app.add_url_rule('/mails', methods=['GET'], view_func=mails_controller.mails)
    app.add_url_rule('/mail/<mail_id>/read', methods=['POST'], view_func=mails_controller.mark_mail_as_read)
    app.add_url_rule('/mail/<mail_id>/unread', methods=['POST'], view_func=mails_controller.mark_mail_as_unread)
    app.add_url_rule('/mails/unread', methods=['POST'], view_func=mails_controller.mark_many_mail_unread)
    app.add_url_rule('/mail/<mail_id>', methods=['GET'], view_func=mails_controller.mail)
    app.add_url_rule('/mail/<mail_id>', methods=['DELETE'], view_func=mails_controller.delete_mail)
    app.add_url_rule('/mails', methods=['DELETE'], view_func=mails_controller.delete_mails)
    app.add_url_rule('/mails', methods=['POST'], view_func=mails_controller.send_mail)
    app.add_url_rule('/mail/<mail_id>/tags', methods=['POST'], view_func=mails_controller.mail_tags)
    app.add_url_rule('/mails', methods=['PUT'], view_func=mails_controller.update_draft)
    # tags
    app.add_url_rule('/tags', methods=['GET'], view_func=tags_controller.tags)


def start_user_agent(debug_enabled):
    with app.app_context():
        leap_session = LeapSession.open(app.config['LEAP_USERNAME'], app.config['LEAP_PASSWORD'],
                                        app.config['LEAP_SERVER_NAME'])
        soledad_querier = SoledadQuerier(soledad=leap_session.account._soledad)

        PixelatedMail.from_email_address = leap_session.account_email()
        pixelated_mailboxes = PixelatedMailBoxes(leap_session.account, soledad_querier)
        pixelated_mail_sender = PixelatedMailSender(leap_session.account_email())

        tag_service = TagService()
        mail_service = MailService(pixelated_mailboxes, pixelated_mail_sender, tag_service, soledad_querier)
        search_engine = SearchEngine()
        MailboxListener.SEARCH_ENGINE = search_engine
        search_engine.index_mails(mail_service.all_mails())
        draft_service = DraftService(pixelated_mailboxes)

        home_controller = HomeController()
        mails_controller = MailsController(mail_service=mail_service,
                                           draft_service=draft_service,
                                           search_engine=search_engine)
        tags_controller = TagsController(search_engine=search_engine)

        _setup_routes(app, home_controller, mails_controller, tags_controller)

        app.run(host=app.config['HOST'], debug=debug_enabled,
                port=app.config['PORT'], use_reloader=False)


def setup():
    try:
        default_config_path = os.path.join(os.environ['HOME'], '.pixelated')

        parser = argparse.ArgumentParser(description='Pixelated user agent.')
        parser.add_argument('--debug', action='store_true',
                            help='DEBUG mode.')
        parser.add_argument('--register', metavar='username', help='register user with name.')
        parser.add_argument('-c', '--config', metavar='configfile', default=default_config_path,
                            help='use specified config file. Default is ~/.pixelated.')

        args = parser.parse_args()
        debug_enabled = args.debug or os.environ.get('DEBUG', False)
        reactor_manager.start_reactor(logging=debug_enabled)

        crochet.setup()
        app.config.from_pyfile(args.config)

        if args.register:
            register_new_user(args.register)
        else:
            start_user_agent(debug_enabled)
    finally:
        reactor_manager.stop_reactor_on_exit()


if __name__ == '__main__':
    setup()