# Source code for ibmcloud_python_sdk.vpc.gateway

    import json
    from ibmcloud_python_sdk.config import params
    from ibmcloud_python_sdk.auth import get_headers as headers
    from ibmcloud_python_sdk.utils.common import query_wrapper as qw
    from ibmcloud_python_sdk.vpc import vpc
    from ibmcloud_python_sdk.vpc import floating_ip
    from ibmcloud_python_sdk.utils.common import resource_not_found
    from ibmcloud_python_sdk.utils.common import resource_deleted
    from ibmcloud_python_sdk.utils.common import check_args
    from ibmcloud_python_sdk.resource import resource_group

    class Gateway():

        def __init__(self):
            self.cfg = params()
            self.vpc = vpc.Vpc()
            self.fip = floating_ip.Fip()
            self.rg = resource_group.ResourceGroup()

        def get_public_gateways(self):
            """Retrieve public gateways list

            :return: List of public gateways
            :rtype: list
            """
            try:
                # Connect to api endpoint for public_gateways
                path = ("/v1/public_gateways?version={}&generation={}".format(
                    self.cfg["version"], self.cfg["generation"]))

                # Return data
                return qw("iaas", "GET", path, headers())["data"]

            except Exception as error:
                print("Error fetching public gateways. {}".format(error))
                raise

        def get_public_gateway(self, gateway):
            """Retrieve specific public gateway

            :param gateway: Public gateway name or ID
            :type gateway: str
            :return: Public gateway information
            :rtype: dict
            """
            by_name = self.get_public_gateway_by_name(gateway)
            if "errors" in by_name:
                for key_name in by_name["errors"]:
                    if key_name["code"] == "not_found":
                        by_id = self.get_public_gateway_by_id(gateway)
                        if "errors" in by_id:
                            return by_id
                        return by_id
                    else:
                        return by_name
            else:
                return by_name

        def get_public_gateway_by_id(self, id):
            """Retrieve specific public gateway by ID

            :param id: Public gateway ID
            :type id: str
            :return: Public gateway information
            :rtype: dict
            """
            try:
                # Connect to api endpoint for public_gateways
                path = ("/v1/public_gateways/{}?version={}&generation={}".format(
                    id, self.cfg["version"], self.cfg["generation"]))

                # Return data
                return qw("iaas", "GET", path, headers())["data"]

            except Exception as error:
                print("Error fetching public gateway with ID {}. {}".format(
                    id, error))
                raise

        def get_public_gateway_by_name(self, name):
            """Retrieve specific public gateway by name

            :param name: Public gateway name
            :type name: str
            :return: Public gateway information
            :rtype: dict
            """
            try:
                # Retrieve public gateways
                data = self.get_public_gateways()
                if "errors" in data:
                    return data

                # Loop over gateways until filter match
                for gateway in data["public_gateways"]:
                    if gateway["name"] == name:
                        # Return data
                        return gateway

                # Return error if no public gateway is found
                return resource_not_found()

            except Exception as error:
                print("Error fetching public gateway with name {}. {}".format(
                    name, error))
                raise

        def create_public_gateway(self, **kwargs):
            """Create public gateway

            :param name: The unique user-defined name for this subnet
            :type name: str, optional
            :param resource_group: The resource group to use
            :type resource_group: str, optional
            :param floating_ip: Identifies a floating IP by a unique property
            :type floating_ip: str, optional
            :param vpc: The VPC the public gateway is to be a part of
            :type vpc: str
            :param zone: The zone the public gateway is to reside in
            :type zone: str
            """
            args = ["vpc", "zone"]
            check_args(args, **kwargs)

            # Build dict of argument and assign default value when needed
            args = {
                'name': kwargs.get('name'),
                'resource_group': kwargs.get('resource_group'),
                'floating_ip': kwargs.get('floating_ip'),
                'vpc': kwargs.get('vpc'),
                'zone': kwargs.get('zone'),
            }

            # Construct payload
            payload = {}
            for key, value in args.items():
                if value is not None:
                    if key == "resource_group":
                        rg_info = self.rg.get_resource_group(
                            args["resource_group"])
                        if "errors" in rg_info:
                            return rg_info
                        payload["resource_group"] = {"id": rg_info["id"]}
                    elif key == "floating_ip":
                        fip_info = self.fip.get_floating_ip(args["floating_ip"])
                        if "errors" in fip_info:
                            return fip_info
                        payload["floating_ip"] = {"address": fip_info["address"]}
                    elif key == "vpc":
                        vpc_info = self.vpc.get_vpc(args["vpc"])
                        if "errors" in vpc_info:
                            return vpc_info
                        payload["vpc"] = {"id": vpc_info["id"]}
                    elif key == "zone":
                        payload["zone"] = {"name": args["zone"]}
                    else:
                        payload[key] = value

            try:
                # Connect to api endpoint for public_gateways
                path = ("/v1/public_gateways?version={}&generation={}".format(
                    self.cfg["version"], self.cfg["generation"]))

                # Return data
                return qw("iaas", "POST", path, headers(),
                          json.dumps(payload))["data"]

            except Exception as error:
                print("Error creating public gateway. {}".format(error))
                raise

        def delete_public_gateway(self, gateway):
            """Delete public gateway

            :param gateway: Public gateway name or ID
            :type gateway: str
            :return: Delete status
            :rtype: dict
            """
            try:
                # Check if public gateway exists
                gateway_info = self.get_public_gateway(gateway)
                if "errors" in gateway_info:
                    return gateway_info

                # Connect to api endpoint for public_gateways
                path = ("/v1/public_gateways/{}?version={}&generation={}".format(
                    gateway_info["id"], self.cfg["version"],
                    self.cfg["generation"]))

                data = qw("iaas", "DELETE", path, headers())

                # Return data
                if data["response"].status != 204:
                    return data["data"]

                # Return status
                return resource_deleted()

            except Exception as error:
                print("Error deleting public gateway with name {}. {}".format(
                    gateway, error))
                raise