# -*- coding: utf-8 -*-
#
# The MIT License (MIT)
#
# Copyright (C) 2017 Marcos Pereira <marcospereira.mpj@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

try:
    from urllib.parse import urljoin
except ImportError:
    from urlparse import urljoin

import requests
from requests.adapters import HTTPAdapter

from .exceptions import KeycloakConnectionError


class ConnectionManager(object):
    """
    Represents a simple server connection.

    :param base_url: (str) The server URL.
    :param headers: (dict) The header parameters of the requests to the server.
    :param timeout: (int) Timeout to use for requests to the server.
    :param verify: (bool) Verify server SSL.
    :param proxies: (dict) The proxies servers requests is sent by.
    """

    def __init__(self, base_url, headers={}, timeout=60, verify=True, proxies=None):
        self._base_url = base_url
        self._headers = headers
        self._timeout = timeout
        self._verify = verify
        self._s = requests.Session()
        self._s.auth = lambda x: x  # don't let requests add auth headers

        # retry once to reset connection with Keycloak after  tomcat's ConnectionTimeout
        # see https://github.com/marcospereirampj/python-keycloak/issues/36
        for protocol in ("https://", "http://"):
            adapter = HTTPAdapter(max_retries=1)
            # adds POST to retry whitelist
            allowed_methods = set(adapter.max_retries.allowed_methods)
            allowed_methods.add("POST")
            adapter.max_retries.allowed_methods = frozenset(allowed_methods)

            self._s.mount(protocol, adapter)

        if proxies:
            self._s.proxies.update(proxies)

    def __del__(self):
        self._s.close()

    @property
    def base_url(self):
        """Return base url in use for requests to the server."""
        return self._base_url

    @base_url.setter
    def base_url(self, value):
        """ """
        self._base_url = value

    @property
    def timeout(self):
        """Return timeout in use for request to the server."""
        return self._timeout

    @timeout.setter
    def timeout(self, value):
        """ """
        self._timeout = value

    @property
    def verify(self):
        """Return verify in use for request to the server."""
        return self._verify

    @verify.setter
    def verify(self, value):
        """ """
        self._verify = value

    @property
    def headers(self):
        """Return header request to the server."""
        return self._headers

    @headers.setter
    def headers(self, value):
        """ """
        self._headers = value

    def param_headers(self, key):
        """
        Return a specific header parameter.

        :param key: (str) Header parameters key.
        :returns: If the header parameters exist, return its value.
        """
        return self.headers.get(key)

    def clean_headers(self):
        """Clear header parameters."""
        self.headers = {}

    def exist_param_headers(self, key):
        """Check if the parameter exists in the header.

        :param key: (str) Header parameters key.
        :returns: If the header parameters exist, return True.
        """
        return self.param_headers(key) is not None

    def add_param_headers(self, key, value):
        """Add a single parameter inside the header.

        :param key: (str) Header parameters key.
        :param value: (str) Value to be added.
        """
        self.headers[key] = value

    def del_param_headers(self, key):
        """Remove a specific parameter.

        :param key: (str) Key of the header parameters.
        """
        self.headers.pop(key, None)

    def raw_get(self, path, **kwargs):
        """Submit get request to the path.

        :param path: (str) Path for request.
        :returns: Response the request.
        :raises: HttpError Can't connect to server.
        """

        try:
            return self._s.get(
                urljoin(self.base_url, path),
                params=kwargs,
                headers=self.headers,
                timeout=self.timeout,
                verify=self.verify,
            )
        except Exception as e:
            raise KeycloakConnectionError("Can't connect to server (%s)" % e)

    def raw_post(self, path, data, **kwargs):
        """Submit post request to the path.

        :param path: (str) Path for request.
        :param data: (dict) Payload for request.
        :returns: Response the request.
        :raises: HttpError Can't connect to server.
        """
        try:
            return self._s.post(
                urljoin(self.base_url, path),
                params=kwargs,
                data=data,
                headers=self.headers,
                timeout=self.timeout,
                verify=self.verify,
            )
        except Exception as e:
            raise KeycloakConnectionError("Can't connect to server (%s)" % e)

    def raw_put(self, path, data, **kwargs):
        """Submit put request to the path.

        :param path: (str) Path for request.
        :param data: (dict) Payload for request.
        :returns: Response the request.
        :raises: HttpError Can't connect to server.
        """
        try:
            return self._s.put(
                urljoin(self.base_url, path),
                params=kwargs,
                data=data,
                headers=self.headers,
                timeout=self.timeout,
                verify=self.verify,
            )
        except Exception as e:
            raise KeycloakConnectionError("Can't connect to server (%s)" % e)

    def raw_delete(self, path, data={}, **kwargs):
        """Submit delete request to the path.

        :param path: (str) Path for request.
        :param data: (dict) Payload for request.
        :returns: Response the request.
        :raises: HttpError Can't connect to server.
        """
        try:
            return self._s.delete(
                urljoin(self.base_url, path),
                params=kwargs,
                data=data,
                headers=self.headers,
                timeout=self.timeout,
                verify=self.verify,
            )
        except Exception as e:
            raise KeycloakConnectionError("Can't connect to server (%s)" % e)

[(51, 'requests.Session', 'requests.Session', False, 'import requests\n'), (57, 'requests.adapters.HTTPAdapter', 'HTTPAdapter', False, 'from requests.adapters import HTTPAdapter\n'), (157, 'urlparse.urljoin', 'urljoin', False, 'from urlparse import urljoin\n'), (176, 'urlparse.urljoin', 'urljoin', False, 'from urlparse import urljoin\n'), (196, 'urlparse.urljoin', 'urljoin', False, 'from urlparse import urljoin\n'), (216, 'urlparse.urljoin', 'urljoin', False, 'from urlparse import urljoin\n')]