# coding: utf-8

{{>partial_header}}

import copy
import logging
{{^asyncio}}
import multiprocessing
{{/asyncio}}
import sys
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 host: Base url.
    :param api_key: Dict to store API key(s).
      Each entry in the dict specifies an API key.
      The dict key is the name of the security scheme in the OAS specification.
      The dict value is the API key secret.
    :param api_key_prefix: Dict to store API prefix (e.g. Bearer).
      The dict key is the name of the security scheme in the OAS specification.
      The dict value is an API key prefix when generating the auth data.
    :param username: Username for HTTP basic authentication.
    :param password: Password for HTTP basic authentication.
    :param access_token: Access token.
{{#hasHttpSignatureMethods}}
    :param signing_info: Configuration parameters for the HTTP signature security scheme.
        Must be an instance of {{{packageName}}}.signing.HttpSigningConfiguration
{{/hasHttpSignatureMethods}}
    :param server_index: Index to servers configuration.
    :param server_variables: Mapping with string values to replace variables in
      templated server configuration. The validation of enums is performed for
      variables with defined enum values before.
    :param server_operation_index: Mapping from operation ID to an index to server
      configuration.
    :param server_operation_variables: Mapping from operation ID to a mapping with
      string values to replace variables in templated server configuration.
      The validation of enums is performed for variables with defined enum
      values before.
    :param ssl_ca_cert: str - the path to a file of concatenated CA certificates
      in PEM format.

{{#hasAuthMethods}}
    :Example:
{{#hasApiKeyMethods}}

    API Key Authentication Example.
    Given the following security scheme in the OpenAPI specification:
      components:
        securitySchemes:
          cookieAuth:         # name for the security scheme
            type: apiKey
            in: cookie
            name: JSESSIONID  # cookie name

    You can programmatically set the cookie:

conf = {{{packageName}}}.Configuration(
    api_key={'cookieAuth': 'abc123'}
    api_key_prefix={'cookieAuth': 'JSESSIONID'}
)

    The following cookie will be added to the HTTP request:
       Cookie: JSESSIONID abc123
{{/hasApiKeyMethods}}
{{#hasHttpBasicMethods}}

    HTTP Basic Authentication Example.
    Given the following security scheme in the OpenAPI specification:
      components:
        securitySchemes:
          http_basic_auth:
            type: http
            scheme: basic

    Configure API client with HTTP basic authentication:

conf = {{{packageName}}}.Configuration(
    username='the-user',
    password='the-password',
)

{{/hasHttpBasicMethods}}
{{#hasHttpSignatureMethods}}

    HTTP Signature Authentication Example.
    Given the following security scheme in the OpenAPI specification:
      components:
        securitySchemes:
          http_basic_auth:
            type: http
            scheme: signature

    Configure API client with HTTP signature authentication. Use the 'hs2019' signature scheme,
    sign the HTTP requests with the RSA-SSA-PSS signature algorithm, and set the expiration time
    of the signature to 5 minutes after the signature has been created.
    Note you can use the constants defined in the {{{packageName}}}.signing module, and you can
    also specify arbitrary HTTP headers to be included in the HTTP signature, except for the
    'Authorization' header, which is used to carry the signature.

    One may be tempted to sign all headers by default, but in practice it rarely works.
    This is because explicit proxies, transparent proxies, TLS termination endpoints or
    load balancers may add/modify/remove headers. Include the HTTP headers that you know
    are not going to be modified in transit.

conf = {{{packageName}}}.Configuration(
    signing_info = {{{packageName}}}.signing.HttpSigningConfiguration(
        key_id =                 'my-key-id',
        private_key_path =       'rsa.pem',
        signing_scheme =         {{{packageName}}}.signing.SCHEME_HS2019,
        signing_algorithm =      {{{packageName}}}.signing.ALGORITHM_RSASSA_PSS,
        signed_headers =         [{{{packageName}}}.signing.HEADER_REQUEST_TARGET,
                                    {{{packageName}}}.signing.HEADER_CREATED,
                                    {{{packageName}}}.signing.HEADER_EXPIRES,
                                    {{{packageName}}}.signing.HEADER_HOST,
                                    {{{packageName}}}.signing.HEADER_DATE,
                                    {{{packageName}}}.signing.HEADER_DIGEST,
                                    'Content-Type',
                                    'User-Agent'
                                    ],
        signature_max_validity = datetime.timedelta(minutes=5)
    )
)
{{/hasHttpSignatureMethods}}
{{/hasAuthMethods}}
    """

    _default = None

    def __init__(self, host=None,
                 api_key=None, api_key_prefix=None,
                 username=None, password=None,
                 access_token=None,
{{#hasHttpSignatureMethods}}
                 signing_info=None,
{{/hasHttpSignatureMethods}}
                 server_index=None, server_variables=None,
                 server_operation_index=None, server_operation_variables=None,
                 ssl_ca_cert=None,
                 ) -> None:
        """Constructor
        """
        self._base_path = "{{{basePath}}}" 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.temp_folder_path = None
        """Temp file folder for downloading files
        """
        # Authentication Settings
        self.api_key = {}
        if api_key:
            self.api_key = api_key
        """dict to store API key(s)
        """
        self.api_key_prefix = {}
        if api_key_prefix:
            self.api_key_prefix = api_key_prefix
        """dict to store API prefix (e.g. Bearer)
        """
        self.refresh_api_key_hook = None
        """function hook to refresh API key if expired
        """
        self.username = username
        """Username for HTTP basic authentication
        """
        self.password = password
        """Password for HTTP basic authentication
        """
        self.access_token = access_token
        """Access token
        """
{{#hasHttpSignatureMethods}}
        if signing_info is not None:
            signing_info.host = host
        self.signing_info = signing_info
        """The HTTP signing configuration
        """
{{/hasHttpSignatureMethods}}
        self.logger = {}
        """Logging Settings
        """
        self.logger["package_logger"] = logging.getLogger("{{packageName}}")
        self.logger["urllib3_logger"] = logging.getLogger("urllib3")
        self.logger_format = '%(asctime)s %(levelname)s %(message)s'
        """Log format
        """
        self.logger_stream_handler = None
        """Log stream handler
        """
        self.logger_file_handler = None
        """Log file handler
        """
        self.logger_file = None
        """Debug file location
        """
        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.
        """

        {{#asyncio}}
        self.connection_pool_maxsize = 100
        """This value is passed to the aiohttp to limit simultaneous connections.
           Default values is 100, None means no-limit.
        """
        {{/asyncio}}
        {{^asyncio}}
        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.
        """
        {{/asyncio}}

        self.proxy = None
        """Proxy URL
        """
        self.proxy_headers = None
        """Proxy headers
        """
        self.safe_chars_for_path_param = ''
        """Safe chars for path_param
        """
        self.retries = None
        """Adding retries 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 = "{{{datetimeFormat}}}"
        """datetime format
        """

        self.date_format = "{{{dateFormat}}}"
        """date format
        """

    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)
{{#hasHttpSignatureMethods}}
        if name == "signing_info" and value is not None:
            # Ensure the host parameter from signing info is the same as
            # Configuration.host.
            value.host = self.host
{{/hasHttpSignatureMethods}}

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

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

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

    @classmethod
    def get_default_copy(cls):
        """Deprecated. Please use `get_default` instead.

        Deprecated. Please use `get_default` instead.

        :return: The configuration object.
        """
        return cls.get_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 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 get_api_key_with_prefix(self, identifier, alias=None):
        """Gets API key (with prefix if set).

        :param identifier: The identifier of apiKey.
        :param alias: The alternative identifier of apiKey.
        :return: The token for api key authentication.
        """
        if self.refresh_api_key_hook is not None:
            self.refresh_api_key_hook(self)
        key = self.api_key.get(identifier, self.api_key.get(alias) if alias is not None else None)
        if key:
            prefix = self.api_key_prefix.get(identifier)
            if prefix:
                return "%s %s" % (prefix, key)
            else:
                return key

    def get_basic_auth_token(self):
        """Gets HTTP basic authentication header (string).

        :return: The token for basic HTTP authentication.
        """
        username = ""
        if self.username is not None:
            username = self.username
        password = ""
        if self.password is not None:
            password = self.password
        return urllib3.util.make_headers(
            basic_auth=username + ':' + password
        ).get('authorization')

    def auth_settings(self):
        """Gets Auth Settings dict for api client.

        :return: The Auth Settings information dict.
        """
        auth = {}
{{#authMethods}}
{{#isApiKey}}
        if '{{name}}' in self.api_key{{#vendorExtensions.x-auth-id-alias}} or '{{.}}' in self.api_key{{/vendorExtensions.x-auth-id-alias}}:
            auth['{{name}}'] = {
                'type': 'api_key',
                'in': {{#isKeyInCookie}}'cookie'{{/isKeyInCookie}}{{#isKeyInHeader}}'header'{{/isKeyInHeader}}{{#isKeyInQuery}}'query'{{/isKeyInQuery}},
                'key': '{{keyParamName}}',
                'value': self.get_api_key_with_prefix(
                    '{{name}}',{{#vendorExtensions.x-auth-id-alias}}
                    alias='{{.}}',{{/vendorExtensions.x-auth-id-alias}}
                ),
            }
{{/isApiKey}}
{{#isBasic}}
  {{#isBasicBasic}}
        if self.username is not None and self.password is not None:
            auth['{{name}}'] = {
                'type': 'basic',
                'in': 'header',
                'key': 'Authorization',
                'value': self.get_basic_auth_token()
            }
  {{/isBasicBasic}}
  {{#isBasicBearer}}
        if self.access_token is not None:
            auth['{{name}}'] = {
                'type': 'bearer',
                'in': 'header',
                {{#bearerFormat}}
                'format': '{{{.}}}',
                {{/bearerFormat}}
                'key': 'Authorization',
                'value': 'Bearer ' + self.access_token
            }
  {{/isBasicBearer}}
  {{#isHttpSignature}}
        if self.signing_info is not None:
            auth['{{name}}'] = {
                'type': 'http-signature',
                'in': 'header',
                'key': 'Authorization',
                'value': None  # Signature headers are calculated for every HTTP request
            }
  {{/isHttpSignature}}
{{/isBasic}}
{{#isOAuth}}
        if self.access_token is not None:
            auth['{{name}}'] = {
                'type': 'oauth2',
                'in': 'header',
                'key': 'Authorization',
                'value': 'Bearer ' + self.access_token
            }
{{/isOAuth}}
{{/authMethods}}
        return auth

    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: {{version}}\n"\
               "SDK Package Version: {{packageVersion}}".\
               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 [
            {{#servers}}
            {
                'url': "{{{url}}}",
                'description': "{{{description}}}{{^description}}No description provided{{/description}}",
                {{#variables}}
                {{#-first}}
                'variables': {
                {{/-first}}
                    '{{{name}}}': {
                        'description': "{{{description}}}{{^description}}No description provided{{/description}}",
                        'default_value': "{{{defaultValue}}}",
                        {{#enumValues}}
                        {{#-first}}
                        'enum_values': [
                        {{/-first}}
                            "{{{.}}}"{{^-last}},{{/-last}}
                        {{#-last}}
                        ]
                        {{/-last}}
                        {{/enumValues}}
                        }{{^-last}},{{/-last}}
                {{#-last}}
                    }
                {{/-last}}
                {{/variables}}
            }{{^-last}},{{/-last}}
            {{/servers}}
        ]

    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
