# -*- coding: utf-8 -*-
"""
OnionShare | https://onionshare.org/

Copyright (C) 2014-2020 Micah Lee, et al. <micah@micahflee.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""

import os, shutil

from . import common, strings
from .onion import TorTooOld, TorErrorProtocolError
from .common import AutoStopTimer


class OnionShare(object):
    """
    OnionShare is the main application class. Pass in options and run
    start_onion_service and it will do the magic.
    """

    def __init__(self, common, onion, local_only=False, autostop_timer=0):
        self.common = common

        self.common.log("OnionShare", "__init__")

        # The Onion object
        self.onion = onion

        self.hidserv_dir = None
        self.onion_host = None
        self.port = None

        # files and dirs to delete on shutdown
        self.cleanup_filenames = []

        # do not use tor -- for development
        self.local_only = local_only

        # optionally shut down after N hours
        self.autostop_timer = autostop_timer
        # init auto-stop timer thread
        self.autostop_timer_thread = None

    def choose_port(self):
        """
        Choose a random port.
        """
        try:
            self.port = self.common.get_available_port(17600, 17650)
        except:
            raise OSError(strings._("no_available_port"))

    def start_onion_service(self, mode_settings, await_publication=True):
        """
        Start the onionshare onion service.
        """
        self.common.log("OnionShare", "start_onion_service")

        if not self.port:
            self.choose_port()

        if self.autostop_timer > 0:
            self.autostop_timer_thread = AutoStopTimer(self.common, self.autostop_timer)

        if self.local_only:
            self.onion_host = f"127.0.0.1:{self.port}"
            return

        self.onion_host = self.onion.start_onion_service(
            mode_settings, self.port, await_publication
        )

        if mode_settings.get("general", "client_auth"):
            self.auth_string = self.onion.auth_string

    def stop_onion_service(self, mode_settings):
        """
        Stop the onion service
        """
        self.onion.stop_onion_service(mode_settings)

    def cleanup(self):
        """
        Shut everything down and clean up temporary files, etc.
        """
        self.common.log("OnionShare", "cleanup")

        # Cleanup files
        try:
            for filename in self.cleanup_filenames:
                if os.path.isfile(filename):
                    os.remove(filename)
                elif os.path.isdir(filename):
                    shutil.rmtree(filename)
        except:
            # Don't crash if file is still in use
            pass
        self.cleanup_filenames = []
