# SPDX-License-Identifier: GPL-3.0-or-later

# Code for starting mitmproxy
#
# This file is part of Hydrilla
#
# Copyright (C) 2021, 2022 Wojtek Kosior
#
# 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 <https://www.gnu.org/licenses/>.
#
#
# I, Wojtek Kosior, thereby promise not to sue for violation of this
# file's license. Although I request that you do not make use of this
# code in a proprietary program, I am not going to enforce this in
# court.


import sys
import os
import subprocess as sp
import typing as t

from pathlib import Path
from shutil import copytree
# The following import requires at least Python 3.8. There is no point adding
# a workaround for Python 3.7 because mitmproxy itself (which we're loading
# here) relies on Python 3.9+. This does not affect the Hydrilla server and
# builder which continue to work under Python 3.7.
from importlib.metadata import distribution

import click

from .. import _version
from ..translations import smart_gettext as _


xdg_state_home = os.environ.get('XDG_STATE_HOME', '.local/state')
default_dir = str(Path.home() / xdg_state_home / 'haketilo')
old_default_dir_path = Path.home() / '.haketilo/'

addon_script_text = '''
from hydrilla.proxy.addon import HaketiloAddon

addons = [HaketiloAddon()]
'''

@click.command(help=_('cli_help.haketilo'))
@click.option('-l', '--listen-host', default='127.0.0.1', type=click.STRING,
              help=_('cli_opt.haketilo.listen_host'))
@click.option('-p', '--port', default=8080, type=click.IntRange(1, 65535),
              help=_('cli_opt.haketilo.port'))
@click.option('-L/-l', '--launch-browser/--no-launch-browser', default=True,
              help=_('cli_opt.haketilo.launch_browser'))
@click.option('-d', '--directory', default=default_dir,
              type=click.Path(file_okay=False),
              help=_('cli_opt.haketilo.dir_defaults_to_{}').format(default_dir))
@click.version_option(version=_version.version, prog_name='Haketilo proxy',
                      message=_('%(prog)s_%(version)s_license'),
                      help=_('cli_opt.haketilo.version'))
def launch(listen_host: str, port: int, launch_browser: bool, directory: str) \
    -> t.NoReturn:
    directory_path = Path(os.path.expanduser(directory)).resolve()

    # Before we started using XDG_STATE_HOME, we were storing files by default
    # under ~/.haketilo. Let's make sync state from there to our new default
    # state directory
    if directory == default_dir      and \
       old_default_dir_path.exists() and \
       not directory_path.exists():
        directory_path.parent.mkdir(parents=True, exist_ok=True)
        copytree(old_default_dir_path, directory_path, symlinks=True)

    directory_path.mkdir(parents=True, exist_ok=True)

    script_path = directory_path / 'addon.py'

    script_path.write_text(addon_script_text)

    launch_browser_str = 'true' if launch_browser else 'false'

    sys.argv = [
        'mitmdump',
        '--listen-host', listen_host,
        '-p', str(port),
        '--set', f'confdir={directory_path / "mitmproxy"}',
        '--set', 'upstream_cert=false',
        '--set', 'connection_strategy=lazy',
        '--set', f'haketilo_dir={directory_path}',
        '--set', f'haketilo_listen_host={listen_host}',
        '--set', f'haketilo_listen_port={port}',
        '--set', f'haketilo_launch_browser={launch_browser_str}',
        '--scripts', str(script_path)
    ]

    for entry_point in distribution('mitmproxy').entry_points:
        if entry_point.group == 'console_scripts' and \
           entry_point.name == 'mitmdump':
            sys.exit(entry_point.load()())

    sys.exit(1)