#!/usr/bin/python

# (c) 2021, NetApp Inc
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

"""NetApp StorageGRID - Manage Load Balancer Endpoints"""

from __future__ import absolute_import, division, print_function

__metaclass__ = type

DOCUMENTATION = """
module: na_sg_grid_gateway
short_description: Manage Load balancer (gateway) endpoints on StorageGRID.
extends_documentation_fragment:
    - netapp.storagegrid.netapp.sg
version_added: '21.7.0'
author: NetApp Ansible Team (@jkandati) <ng-sg-ansibleteam@netapp.com>
description:
- Create or Update Load Balancer Endpoints on StorageGRID.
- This module is idempotent if I(private_key) is not specified.
- The module will match an existing config based on I(port) and I(display_name).
- If multiple load balancer endpoints exist utilizing the same port and display name, use I(gateway_id) to select the intended endpoint.
options:
  state:
    description:
    - Whether the specified load balancer endpoint should be configured.
    type: str
    choices: ['present', 'absent']
    default: present
  gateway_id:
    description:
    - ID of the load balancer endpoint.
    type: str
    version_added: '21.9.0'
  display_name:
    description:
    - A display name for the configuration.
    - This parameter can be modified if I(gateway_id) is also specified.
    type: str
  port:
    description:
    - The TCP port to serve traffic on.
    - This parameter cannot be modified after the load balancer endpoint has been created.
    type: int
    required: true
  secure:
    description:
    - Whether the load balancer endpoint serves HTTP or HTTPS traffic.
    - This parameter cannot be modified after the load balancer endpoint has been created.
    type: bool
    default: true
  enable_ipv4:
    description:
    - Indicates whether to listen for connections on IPv4.
    type: bool
    default: true
  enable_ipv6:
    description:
    - Indicates whether to listen for connections on IPv6.
    type: bool
    default: true
  binding_mode:
    description:
    - Binding mode to restrict accessibility of the load balancer endpoint.
    - A binding mode other than I(global) requires StorageGRID 11.5 or greater.
    type: str
    choices: ['global', 'ha-groups', 'node-interfaces']
    default: 'global'
    version_added: '21.9.0'
  ha_groups:
    description:
    - A set of StorageGRID HA Groups by name or UUID to bind the load balancer endpoint to.
    - Option is ignored unless I(binding_mode=ha-groups).
    type: list
    elements: str
    version_added: '21.9.0'
  node_interfaces:
    description:
    - A set of StorageGRID node interfaces to bind the load balancer endpoint to.
    type: list
    elements: dict
    suboptions:
      node:
        description:
        - Name of the StorageGRID node.
        type: str
      interface:
        description:
        - The interface to bind to. eth0 corresponds to the Grid Network, eth1 to the Admin Network, and eth2 to the Client Network.
        type: str
    version_added: '21.9.0'
  default_service_type:
    description:
    - The type of service to proxy through the load balancer.
    type: str
    choices: ['s3', 'swift']
    default: 's3'
  server_certificate:
    description:
    - X.509 server certificate in PEM-encoding.
    - Omit if using default certificates.
    type: str
    required: false
  private_key:
    description:
    - Certficate private key in PEM-encoding.
    - Required if I(server_certificate) is not empty.
    type: str
    required: false
  ca_bundle:
    description:
    - Intermediate CA certificate bundle in concatenated PEM-encoding.
    - Omit when there is no intermediate CA.
    type: str
    required: false

"""
EXAMPLES = """
  - name: Create and Upload Certificate to a Gateway Endpoint with global binding
    netapp.storagegrid.na_sg_grid_gateway:
      api_url: "https://<storagegrid-endpoint-url>"
      auth_token: "storagegrid-auth-token"
      displayName: "FabricPool Endpoint"
      port: 10443
      secure: True
      enable_ipv4: True
      enable_ipv6: True
      default_service_type: "s3"
      server_certificate: |
        -----BEGIN CERTIFICATE-----
        MIIC6DCCAdACCQC7l4WukhKD0zANBgkqhkiG9w0BAQsFADA2..swCQYDVQQGEwJB
        BAMMHnNnYW4wMS5kZXYubWljcm9icmV3Lm5ldGFwcC5hdTCC..IwDQYJKoZIhvcN
        AQEBBQADggEPADCCAQoCggEBAMvjm9I35lmKcC7ITVL8+QiZ..lvdkbfZCUQrfdy
        71inP+XmPjs0rnkhICA9ItODteRcVlO+t7nDTfm7HgG0mJFk..m0ffyEYrcx24qu
        S7gXYQjRsJmrep1awoaCa20BMGuqK2WKI3IvZ7YiT22qkBqK..+hIFffX6u3Jy+B
        77pR6YcATtpMHW/AaOx+OX9l80dIRsRZKMDxYQ==
        -----END CERTIFICATE-----
      private_key: |
        -----BEGIN PRIVATE KEY-----
        MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIB..DL45vSN+ZZinAu
        L25W0+cz1Oi69AKkI7d9nbFics2ay5+7o+4rKqf3en2R4MSx..vy+iDlOmATib5O
        x8TN5pJ9AgMBAAECggEADDLM8tHXXUoUFihzv+BUwff8p8Yc..cXFcSes+xTd5li
        po8lNsx/v2pQx4ByBkuaYLZGIEXOWS6gkp44xhIXgQKBgQD4..7862u5HLbmhrV3
        vs8nC69b3QKBgQDacCD8d8JpwPbg8t2VjXM3UvdmgAaLUfU7..DWV+W3jqzmDOoN
        zWVgPbPNj0UmzvLDbgxLoxe77wjn2BHsAJVAfJ9VeQKBgGqF..gYO+wHR8lJUoa5
        ZEe8Upy2oBtvND/0dnwO2ym2FGsBJN0Gr4NKdG5vkzLsthKk..Rm0ikwEUOUZQKE
        K8J5yEVeo9K2v3wggtq8fYn6
        -----END PRIVATE KEY-----
      validate_certs: false

  - name: Create a HTTP Gateway Endpoint with HA Group Binding
    netapp.storagegrid.na_sg_grid_gateway:
      api_url: "https://<storagegrid-endpoint-url>"
      auth_token: "storagegrid-auth-token"
      displayName: "App Endpoint 1"
      port: 10501
      secure: false
      enable_ipv4: True
      enable_ipv6: True
      default_service_type: "s3"
      binding_mode: ha-groups
      ha_groups: site1_ha_group
      validate_certs: false

  - name: Create a HTTP Gateway Endpoint with Node Interface Binding
    netapp.storagegrid.na_sg_grid_gateway:
      api_url: "https://<storagegrid-endpoint-url>"
      auth_token: "storagegrid-auth-token"
      displayName: "App Endpoint 2"
      port: 10502
      secure: false
      enable_ipv4: True
      enable_ipv6: True
      default_service_type: "s3"
      binding_mode: node-interfaces
      node_interfaecs:
      - node: SITE1_ADM1
        interface: eth2
      - node: SITE2_ADM1
        interface: eth2
      validate_certs: false

  - name: Delete Gateway Endpoint
    netapp.storagegrid.na_sg_grid_gateway:
      api_url: "https://<storagegrid-endpoint-url>"
      auth_token: "storagegrid-auth-token"
      displayName: "App Endpoint 2"
      port: 10502
      default_service_type: "s3"
      validate_certs: false
"""

RETURN = """
resp:
    description: Returns information about the StorageGRID Load Balancer Endpoint.
    returned: success
    type: dict
    sample: {
        "id": "ffffffff-ffff-ffff-ffff-ffffffffffff",
        "displayName": "ansibletest-secure",
        "enableIPv4": True,
        "enableIPv6": True,
        "port": 10443,
        "secure": True,
        "accountId": "0",
        "defaultServiceType": "s3",
        "certSource": "plaintext",
        "plaintextCertData": {
            "serverCertificateEncoded": "-----BEGIN CERTIFICATE-----MIIC6DCCAdACCQC7l4WukhKD0zANBgkqhkiG9w0BAQsFADA2MQswCQYDVQQGE...-----END CERTIFICATE-----",
            "caBundleEncoded": "-----BEGIN CERTIFICATE-----MIIDdTCCAl2gAwIBAgILBAAAAAABFUtaw5QwDQYJKoZIhvcNAQEFBQAwVzELM...-----END CERTIFICATE-----",
            "metadata": {...}
        }
    }
"""

import ansible_collections.netapp.storagegrid.plugins.module_utils.netapp as netapp_utils
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.netapp.storagegrid.plugins.module_utils.netapp_module import NetAppModule
from ansible_collections.netapp.storagegrid.plugins.module_utils.netapp import SGRestAPI


class SgGridGateway:
    """
    Create, modify and delete Gateway entries for StorageGRID
    """

    def __init__(self):
        """
        Parse arguments, setup state variables,
        check parameters and ensure request module is installed
        """
        self.argument_spec = netapp_utils.na_storagegrid_host_argument_spec()
        self.argument_spec.update(
            dict(
                # Arguments for Creating Gateway Port
                state=dict(required=False, type="str", choices=["present", "absent"], default="present"),
                gateway_id=dict(required=False, type="str"),
                display_name=dict(required=False, type="str"),
                port=dict(required=True, type="int"),
                secure=dict(required=False, type="bool", default=True),
                enable_ipv4=dict(required=False, type="bool", default=True),
                enable_ipv6=dict(required=False, type="bool", default=True),
                binding_mode=dict(
                    required=False, type="str", choices=["global", "ha-groups", "node-interfaces"], default="global"
                ),
                ha_groups=dict(required=False, type="list", elements="str"),
                node_interfaces=dict(
                    required=False,
                    type="list",
                    elements="dict",
                    options=dict(
                        node=dict(required=False, type="str"),
                        interface=dict(required=False, type="str"),
                    ),
                ),
                # Arguments for setting Gateway Virtual Server
                default_service_type=dict(required=False, type="str", choices=["s3", "swift"], default="s3"),
                server_certificate=dict(required=False, type="str"),
                ca_bundle=dict(required=False, type="str"),
                private_key=dict(required=False, type="str", no_log=True),
            )
        )

        parameter_map_gateway = {
            "gateway_id": "id",
            "display_name": "displayName",
            "port": "port",
            "secure": "secure",
            "enable_ipv4": "enableIPv4",
            "enable_ipv6": "enableIPv6",
        }
        parameter_map_server = {
            "server_certificate": "serverCertificateEncoded",
            "ca_bundle": "caBundleEncoded",
            "private_key": "privateKeyEncoded",
        }
        self.module = AnsibleModule(
            argument_spec=self.argument_spec,
            required_if=[("state", "present", ["display_name"])],
            supports_check_mode=True,
        )

        self.na_helper = NetAppModule()

        # set up state variables
        self.parameters = self.na_helper.set_parameters(self.module.params)
        # Calling generic SG rest_api class
        self.rest_api = SGRestAPI(self.module)
        # Get API version
        self.rest_api.get_sg_product_version()

        # Checking for the parameters passed and create new parameters list

        # Parameters for creating a new gateway port configuration
        self.data_gateway = {}
        self.data_gateway["accountId"] = "0"

        for k in parameter_map_gateway.keys():
            if self.parameters.get(k) is not None:
                self.data_gateway[parameter_map_gateway[k]] = self.parameters[k]

        # Parameters for setting a gateway virtual server configuration for a gateway port
        self.data_server = {}
        self.data_server["defaultServiceType"] = self.parameters["default_service_type"]

        if self.parameters["secure"]:
            self.data_server["plaintextCertData"] = {}
            self.data_server["certSource"] = "plaintext"

            for k in parameter_map_server.keys():
                if self.parameters.get(k) is not None:
                    self.data_server["plaintextCertData"][parameter_map_server[k]] = self.parameters[k]

        if self.parameters["binding_mode"] != "global":
            self.rest_api.fail_if_not_sg_minimum_version("non-global binding mode", 11, 5)

        if self.parameters["binding_mode"] == "ha-groups":
            self.data_gateway["pinTargets"] = {}
            self.data_gateway["pinTargets"]["haGroups"] = self.build_ha_group_list()
            self.data_gateway["pinTargets"]["nodeInterfaces"] = []

        elif self.parameters["binding_mode"] == "node-interfaces":
            self.data_gateway["pinTargets"] = {}
            self.data_gateway["pinTargets"]["nodeInterfaces"] = self.build_node_interface_list()
            self.data_gateway["pinTargets"]["haGroups"] = []

        else:
            self.data_gateway["pinTargets"] = {}
            self.data_gateway["pinTargets"]["haGroups"] = []
            self.data_gateway["pinTargets"]["nodeInterfaces"] = []

    def build_ha_group_list(self):
        ha_group_ids = []

        api = "api/v3/private/ha-groups"
        ha_groups, error = self.rest_api.get(api)
        if error:
            self.module.fail_json(msg=error)

        for param in self.parameters["ha_groups"]:
            ha_group = next(
                (item for item in ha_groups["data"] if (item["name"] == param or item["id"] == param)), None
            )
            if ha_group is not None:
                ha_group_ids.append(ha_group["id"])
            else:
                self.module.fail_json(msg="HA Group '%s' is invalid" % param)

        return ha_group_ids

    def build_node_interface_list(self):
        node_interfaces = []

        api = "api/v3/grid/node-health"
        nodes, error = self.rest_api.get(api)

        if error:
            self.module.fail_json(msg=error)

        for node_interface in self.parameters["node_interfaces"]:
            node_dict = {}
            node = next((item for item in nodes["data"] if item["name"] == node_interface["node"]), None)
            if node is not None:
                node_dict["nodeId"] = node["id"]
                node_dict["interface"] = node_interface["interface"]
                node_interfaces.append(node_dict)
            else:
                self.module.fail_json(msg="Node '%s' is invalid" % node_interface["node"])

        return node_interfaces

    def get_grid_gateway_config(self, gateway_id):
        api = "api/v3/private/gateway-configs/%s" % gateway_id
        response, error = self.rest_api.get(api)

        if error:
            self.module.fail_json(msg=error)

        gateway = response["data"]
        gateway_config = self.get_grid_gateway_server_config(gateway["id"])

        return gateway, gateway_config

    def get_grid_gateway_server_config(self, gateway_id):
        api = "api/v3/private/gateway-configs/%s/server-config" % gateway_id
        response, error = self.rest_api.get(api)

        if error:
            self.module.fail_json(msg=error)

        return response["data"]

    def get_grid_gateway_ports(self, target_port):

        configured_ports = []
        gateway = {}
        gateway_config = {}

        api = "api/v3/private/gateway-configs"
        response, error = self.rest_api.get(api)

        if error:
            self.module.fail_json(msg=error)

        grid_gateway_ports = response["data"]

        # Get only a list of used ports
        configured_ports = [data["port"] for data in grid_gateway_ports]

        for index, port in enumerate(configured_ports):
            # if port already exists then get gateway ID and get the gateway port server configs
            if target_port == port and grid_gateway_ports[index]["displayName"] == self.parameters["display_name"]:
                gateway = grid_gateway_ports[index]
                gateway_config = self.get_grid_gateway_server_config(gateway["id"])
                break

        return gateway, gateway_config

    def create_grid_gateway(self):
        api = "api/v3/private/gateway-configs"
        response, error = self.rest_api.post(api, self.data_gateway)

        if error:
            self.module.fail_json(msg=error)

        return response["data"]

    def delete_grid_gateway(self, gateway_id):
        api = "api/v3/private/gateway-configs/" + gateway_id
        self.data = None
        response, error = self.rest_api.delete(api, self.data)

        if error:
            self.module.fail_json(msg=error)

    def update_grid_gateway(self, gateway_id):
        api = "api/v3/private/gateway-configs/%s" % gateway_id
        response, error = self.rest_api.put(api, self.data_gateway)

        if error:
            self.module.fail_json(msg=error)

        return response["data"]

    def update_grid_gateway_server(self, gateway_id):
        api = "api/v3/private/gateway-configs/%s/server-config" % gateway_id
        response, error = self.rest_api.put(api, self.data_server)

        if error:
            self.module.fail_json(msg=error)

        return response["data"]

    def apply(self):
        gateway = None
        gateway_config = None

        update_gateway = False
        update_gateway_server = False

        if self.parameters.get("gateway_id"):
            gateway, gateway_config = self.get_grid_gateway_config(self.parameters["gateway_id"])

        else:
            # Get list of all gateway port configurations
            gateway, gateway_config = self.get_grid_gateway_ports(self.data_gateway["port"])

        cd_action = self.na_helper.get_cd_action(gateway.get("id"), self.parameters)

        if cd_action is None and self.parameters["state"] == "present":
            update = False

            if self.data_server.get("plaintextCertData"):
                if self.data_server["plaintextCertData"].get("privateKeyEncoded") is not None:
                    update = True
                    self.module.warn("This module is not idempotent when private_key is present.")

            if gateway_config.get("plaintextCertData"):
                # If certificate private key supplied, update
                if gateway_config["plaintextCertData"].get("metadata"):
                    # remove metadata because we can't compare that
                    del gateway_config["plaintextCertData"]["metadata"]

            # compare current and desired state
            # gateway config cannot be modified until StorageGRID 11.5
            if self.rest_api.meets_sg_minimum_version(11, 5):
                update_gateway = self.na_helper.get_modified_attributes(gateway, self.data_gateway)
            update_gateway_server = self.na_helper.get_modified_attributes(gateway_config, self.data_server)

            if update:
                self.na_helper.changed = True

        result_message = ""
        resp_data = {}

        if self.na_helper.changed and not self.module.check_mode:
            if cd_action == "delete":
                self.delete_grid_gateway(gateway["id"])
                result_message = "Load Balancer Gateway Port Deleted"

            elif cd_action == "create":
                resp_data = self.create_grid_gateway()
                gateway["id"] = resp_data["id"]
                resp_data_server = self.update_grid_gateway_server(gateway["id"])
                resp_data.update(resp_data_server)
                result_message = "Load Balancer Gateway Port Created"

            else:
                resp_data = gateway
                if update_gateway:
                    resp_data = self.update_grid_gateway(gateway["id"])
                    resp_data.update(gateway_config)

                if update_gateway_server:
                    resp_data_server = self.update_grid_gateway_server(gateway["id"])
                    resp_data.update(resp_data_server)
                result_message = "Load Balancer Gateway Port Updated"

        self.module.exit_json(changed=self.na_helper.changed, msg=result_message, resp=resp_data)


def main():
    """
    Main function
    """
    na_sg_grid_gateway = SgGridGateway()
    na_sg_grid_gateway.apply()


if __name__ == "__main__":
    main()