# SPDX-License-Identifier: AGPL-3.0-or-later
"""
FreedomBox app to configure I2P.
"""

from django.utils.translation import ugettext_lazy as _

from plinth import actions
from plinth import app as app_module
from plinth import frontpage, menu
from plinth.daemon import Daemon
from plinth.modules.apache.components import Webserver
from plinth.modules.firewall.components import Firewall
from plinth.modules.i2p.resources import FAVORITES
from plinth.modules.users.components import UsersAndGroups

from .manifest import backup, clients  # noqa, pylint: disable=unused-import

version = 1

service_name = 'i2p'

managed_services = [service_name]

managed_packages = ['i2p']

_description = [
    _('The Invisible Internet Project is an anonymous network layer intended '
      'to protect communication from censorship and surveillance. I2P '
      'provides anonymity by sending encrypted traffic through a '
      'volunteer-run network distributed around the world.'),
    _('Find more information about I2P on their project '
      '<a href="https://geti2p.net" target="_blank">homepage</a>.'),
    _('The first visit to the provided web interface will initiate the '
      'configuration process.')
]

port_forwarding_info = [
    ('TCP', 4444),
    ('TCP', 4445),
    ('TCP', 6668),
]

tunnels_to_manage = {
    'I2P HTTP Proxy': 'i2p-http-proxy-freedombox',
    'I2P HTTPS Proxy': 'i2p-https-proxy-freedombox',
    'Irc2P': 'i2p-irc-freedombox'
}

app = None


class I2PApp(app_module.App):
    """FreedomBox app for I2P."""

    app_id = 'i2p'

    def __init__(self):
        """Create components for the app."""
        super().__init__()

        groups = {'i2p': _('Manage I2P application')}

        info = app_module.Info(app_id=self.app_id, version=version,
                               name=_('I2P'), icon_filename='i2p',
                               short_description=_('Anonymity Network'),
                               description=_description, manual_page='I2P',
                               clients=clients)
        self.add(info)

        menu_item = menu.Menu('menu-i2p', info.name, info.short_description,
                              info.icon_filename, 'i2p:index',
                              parent_url_name='apps')
        self.add(menu_item)

        shortcut = frontpage.Shortcut('shortcut-i2p', info.name,
                                      short_description=info.short_description,
                                      icon=info.icon_filename, url='/i2p/',
                                      clients=info.clients,
                                      login_required=True,
                                      allowed_groups=list(groups))
        self.add(shortcut)

        firewall = Firewall('firewall-i2p-web', info.name,
                            ports=['http', 'https'], is_external=True)
        self.add(firewall)

        firewall = Firewall('firewall-i2p-proxies', _('I2P Proxy'),
                            ports=tunnels_to_manage.values(),
                            is_external=False)
        self.add(firewall)

        webserver = Webserver('webserver-i2p', 'i2p-freedombox',
                              urls=['https://{host}/i2p/'])
        self.add(webserver)

        daemon = Daemon('daemon-i2p', managed_services[0],
                        listen_ports=[(7657, 'tcp6')])
        self.add(daemon)

        users_and_groups = UsersAndGroups('users-and-groups-i2p',
                                          groups=groups)
        self.add(users_and_groups)


def init():
    """Initialize the module."""
    global app
    app = I2PApp()

    setup_helper = globals()['setup_helper']
    if setup_helper.get_state() != 'needs-setup' and app.is_enabled():
        app.set_enabled(True)


def setup(helper, old_version=None):
    """Install and configure the module."""
    helper.install(managed_packages)

    helper.call('post', app.disable)
    # Add favorites to the configuration
    for fav in FAVORITES:
        args = [
            'add-favorite',
            '--name',
            fav.get('name'),
            '--url',
            fav.get('url'),
        ]
        if 'icon' in fav:
            args.extend(['--icon', fav.get('icon')])

        if 'description' in fav:
            args.extend(['--description', fav.get('description')])

        helper.call('post', actions.superuser_run, 'i2p', args)

    # Tunnels to all interfaces
    for tunnel in tunnels_to_manage:
        helper.call('post', actions.superuser_run, 'i2p', [
            'set-tunnel-property', '--name', tunnel, '--property', 'interface',
            '--value', '0.0.0.0'
        ])
    helper.call('post', app.enable)
