#!/usr/bin/env python

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import uuid
from typing import TYPE_CHECKING, Any, Dict, Optional, Union

import urllib3
from selenium.webdriver.remote.remote_connection import RemoteConnection

from appium.common.helper import library_version

if TYPE_CHECKING:
    from urllib.parse import ParseResult


PREFIX_HEADER = 'appium/'


class AppiumConnection(RemoteConnection):
    _proxy_url: Optional[str]

    def __init__(
        self,
        remote_server_addr: str,
        keep_alive: bool = False,
        ignore_proxy: Optional[bool] = False,
        init_args_for_pool_manager: Union[Dict[str, Any], None] = None,
    ):
        # Need to call before super().__init__ in order to pass arguments for the pool manager in the super.
        self._init_args_for_pool_manager = init_args_for_pool_manager or {}

        super().__init__(remote_server_addr, keep_alive=keep_alive, ignore_proxy=ignore_proxy)

    def _get_connection_manager(self) -> Union[urllib3.PoolManager, urllib3.ProxyManager]:
        # https://github.com/SeleniumHQ/selenium/blob/0e0194b0e52a34e7df4b841f1ed74506beea5c3e/py/selenium/webdriver/remote/remote_connection.py#L134
        pool_manager_init_args = {'timeout': self.get_timeout()}

        if self._ca_certs:
            pool_manager_init_args['cert_reqs'] = 'CERT_REQUIRED'
            pool_manager_init_args['ca_certs'] = self._ca_certs
        else:
            # This line is necessary to disable certificate verification
            pool_manager_init_args['cert_reqs'] = 'CERT_NONE'

        pool_manager_init_args.update(self._init_args_for_pool_manager)

        if self._proxy_url:
            if self._proxy_url.lower().startswith('sock'):
                from urllib3.contrib.socks import SOCKSProxyManager

                return SOCKSProxyManager(self._proxy_url, **pool_manager_init_args)
            if self._identify_http_proxy_auth():
                self._proxy_url, self._basic_proxy_auth = self._separate_http_proxy_auth()
                pool_manager_init_args['proxy_headers'] = urllib3.make_headers(proxy_basic_auth=self._basic_proxy_auth)
            return urllib3.ProxyManager(self._proxy_url, **pool_manager_init_args)

        return urllib3.PoolManager(**pool_manager_init_args)

    @classmethod
    def get_remote_connection_headers(cls, parsed_url: 'ParseResult', keep_alive: bool = True) -> Dict[str, Any]:
        """Override get_remote_connection_headers in RemoteConnection"""
        headers = RemoteConnection.get_remote_connection_headers(parsed_url, keep_alive=keep_alive)
        # e.g. appium/0.49 (selenium/3.141.0 (python linux))
        headers['User-Agent'] = f'{PREFIX_HEADER}{library_version()} ({headers["User-Agent"]})'
        if parsed_url.path.endswith('/session'):
            # https://github.com/appium/appium-base-driver/pull/400
            headers['X-Idempotency-Key'] = str(uuid.uuid4())

        return headers