# coding: utf-8

"""
Wallee AG Python SDK

This library allows to interact with the Wallee AG payment service.

Copyright owner: Wallee AG
Website: https://en.wallee.com
Developer email: ecosystem-team@wallee.com

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 copy
import logging
from logging import FileHandler
import multiprocessing
import sys
from typing import Optional
import urllib3

import http.client as httplib

JSON_SCHEMA_VALIDATION_KEYWORDS = {
    'multipleOf', 'maximum', 'exclusiveMaximum',
    'minimum', 'exclusiveMinimum', 'maxLength',
    'minLength', 'pattern', 'maxItems', 'minItems'
}

class Configuration:
    """This class contains various settings of the API client.

    :param user_id: User ID used for request authentication.
    :param authentication_key: Authentication key used for request authentication.
    """

    _default = None

    def __init__(self,
                 host=None,
                 user_id='',
                 authentication_key='',
                 server_index=None, server_variables=None,
                 server_operation_index=None, server_operation_variables=None,
                 ignore_operation_servers=False,
                 ssl_ca_cert=None,
                 retries=None,
                 default_headers={},
                 request_timeout=25,
                 *,
                 debug: Optional[bool] = None
                 ) -> None:
        self._base_path = "https://app-wallee.com/api/v2.0" if host is None else host
        """Default Base url
        """
        self.server_index = 0 if server_index is None and host is None else server_index
        self.server_operation_index = server_operation_index or {}
        """Default server index
        """
        self.server_variables = server_variables or {}
        self.server_operation_variables = server_operation_variables or {}
        """Default server variables
        """
        self.ignore_operation_servers = ignore_operation_servers
        """Ignore operation servers
        """
        self.temp_folder_path = None
        """Temp file folder for downloading files
        """
        # Authentication Settings
        self._user_id = user_id
        """User ID used for request authentication.
        """
        self._authentication_key = authentication_key
        """Authentication key used for request authentication.
        """
        self.logger = {"package_logger": logging.getLogger("wallee"), "urllib3_logger": logging.getLogger("urllib3")}
        """Logging Settings
        """
        self.logger_format = '%(asctime)s %(levelname)s %(message)s'
        """Log format
        """
        self.logger_stream_handler = None
        """Log stream handler
        """
        self.logger_file_handler: Optional[FileHandler] = None
        """Log file handler
        """
        self.logger_file = None
        """Debug file location
        """
        if debug is not None:
            self.debug = debug
        else:
            self.__debug = False
        """Debug switch
        """

        self.verify_ssl = True
        """SSL/TLS verification
           Set this to false to skip verifying SSL certificate when calling API
           from https server.
        """
        self.ssl_ca_cert = ssl_ca_cert
        """Set this to customize the certificate file to verify the peer.
        """
        self.cert_file = None
        """client certificate file
        """
        self.key_file = None
        """client key file
        """
        self.assert_hostname = None
        """Set this to True/False to enable/disable SSL hostname verification.
        """
        self.tls_server_name = None
        """SSL/TLS Server Name Indication (SNI)
           Set this to the SNI value expected by the server.
        """

        self.connection_pool_maxsize = multiprocessing.cpu_count() * 5
        """urllib3 connection pool's maximum number of connections saved
           per pool. urllib3 uses 1 connection as default value, but this is
           not the best value when you are making a lot of possibly parallel
           requests to the same host, which is often the case here.
           cpu_count * 5 is used as default value to increase performance.
        """

        self.proxy: Optional[str] = None
        """Proxy URL
        """
        self.proxy_headers = None
        """Proxy headers
        """
        self.safe_chars_for_path_param = ''
        """Safe chars for path_param
        """
        self.retries = urllib3.Retry(False)
        """Explicitly setting retries to False in order to override urllib3 default value 3.
        """
        # Enable client side validation
        self.client_side_validation = True

        self.socket_options = None
        """Options to pass down to the underlying urllib3 socket
        """

        self.datetime_format = "%Y-%m-%dT%H:%M:%S.%f%z"
        """datetime format
        """

        self.date_format = "%Y-%m-%d"
        """date format
        """

        self.default_headers = default_headers
        """default headers
        """

        self.request_timeout = request_timeout
        """the time limit for HTTP request in seconds. (Default value is: 25)
        """

    def __deepcopy__(self, memo):
        cls = self.__class__
        result = cls.__new__(cls)
        memo[id(self)] = result
        for k, v in self.__dict__.items():
            if k not in ('logger', 'logger_file_handler'):
                setattr(result, k, copy.deepcopy(v, memo))
        # shallow copy of loggers
        result.logger = copy.copy(self.logger)
        # use setters to configure loggers
        result.logger_file = self.logger_file
        result.debug = self.debug
        return result

    def __setattr__(self, name, value):
        object.__setattr__(self, name, value)

    @classmethod
    def set_default(cls, default):
        """Set default instance of configuration.

        It stores default configuration, which can be
        returned by get_default method.

        :param default: object of Configuration
        """
        cls._default = default

    @classmethod
    def get_default(cls):
        """Return the default configuration.

        This method returns newly created, based on default constructor,
        object of Configuration class or returns a copy of default
        configuration.

        :return: The configuration object.
        """
        if cls._default is None:
            cls._default = Configuration()
        return cls._default

    @property
    def logger_file(self):
        """The logger file.

        If the logger_file is None, then add stream handler and remove file
        handler. Otherwise, add file handler and remove stream handler.

        :param value: The logger_file path.
        :type: str
        """
        return self.__logger_file

    @logger_file.setter
    def logger_file(self, value):
        """The logger file.

        If the logger_file is None, then add stream handler and remove file
        handler. Otherwise, add file handler and remove stream handler.

        :param value: The logger_file path.
        :type: str
        """
        self.__logger_file = value
        if self.__logger_file:
            # If set logging file,
            # then add file handler and remove stream handler.
            self.logger_file_handler = logging.FileHandler(self.__logger_file)
            self.logger_file_handler.setFormatter(self.logger_formatter)
            for _, logger in self.logger.items():
                logger.addHandler(self.logger_file_handler)

    @property
    def debug(self):
        """Debug status

        :param value: The debug status, True or False.
        :type: bool
        """
        return self.__debug

    @debug.setter
    def debug(self, value):
        """Debug status

        :param value: The debug status, True or False.
        :type: bool
        """
        self.__debug = value
        if self.__debug:
            # if debug status is True, turn on debug logging
            for _, logger in self.logger.items():
                logger.setLevel(logging.DEBUG)
            # turn on httplib debug
            httplib.HTTPConnection.debuglevel = 1
        else:
            # if debug status is False, turn off debug logging,
            # setting log level to default `logging.WARNING`
            for _, logger in self.logger.items():
                logger.setLevel(logging.WARNING)
            # turn off httplib debug
            httplib.HTTPConnection.debuglevel = 0

    @property
    def request_timeout(self):
        return self._request_timeout

    @request_timeout.setter
    def request_timeout(self, value):
        self._request_timeout = value

    @property
    def logger_format(self):
        """The logger format.

        The logger_formatter will be updated when sets logger_format.

        :param value: The format string.
        :type: str
        """
        return self.__logger_format

    @logger_format.setter
    def logger_format(self, value):
        """The logger format.

        The logger_formatter will be updated when sets logger_format.

        :param value: The format string.
        :type: str
        """
        self.__logger_format = value
        self.logger_formatter = logging.Formatter(self.__logger_format)

    def to_debug_report(self):
        """Gets the essential information for debugging.

        :return: The report for debugging.
        """
        return "Python SDK Debug Report:\n"\
               "OS: {env}\n"\
               "Python Version: {pyversion}\n"\
               "Version of the API: 2.0\n"\
               "SDK Package Version: 6.0.0".\
               format(env=sys.platform, pyversion=sys.version)

    def get_host_settings(self):
        """Gets an array of host settings

        :return: An array of host settings
        """
        return [
            {
                'url': "https://app-wallee.com/api/v2.0",
                'description': "No description provided",
            }
        ]

    def get_host_from_settings(self, index, variables=None, servers=None):
        """Gets host URL based on the index and variables
        :param index: array index of the host settings
        :param variables: hash of variable and the corresponding value
        :param servers: an array of host settings or None
        :return: URL based on host settings
        """
        if index is None:
            return self._base_path

        variables = {} if variables is None else variables
        servers = self.get_host_settings() if servers is None else servers

        try:
            server = servers[index]
        except IndexError:
            raise ValueError(
                "Invalid index {0} when selecting the host settings. "
                "Must be less than {1}".format(index, len(servers)))

        url = server['url']

        # go through variables and replace placeholders
        for variable_name, variable in server.get('variables', {}).items():
            used_value = variables.get(
                variable_name, variable['default_value'])

            if 'enum_values' in variable \
                    and used_value not in variable['enum_values']:
                raise ValueError(
                    "The variable `{0}` in the host URL has invalid value "
                    "{1}. Must be {2}.".format(
                        variable_name, variables[variable_name],
                        variable['enum_values']))

            url = url.replace("{" + variable_name + "}", used_value)

        return url

    @property
    def host(self):
        """Return generated host."""
        return self.get_host_from_settings(self.server_index, variables=self.server_variables)

    @host.setter
    def host(self, value):
        """Fix base path."""
        self._base_path = value
        self.server_index = None

    @property
    def user_id(self):
        """Return Authentication User ID."""
        return self._user_id

    @user_id.setter
    def user_id(self, value):
        self._user_id = value

    @property
    def authentication_key(self):
        """Return Authentication key."""
        return self._authentication_key

    @authentication_key.setter
    def authentication_key(self, value):
        self._authentication_key = value