#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2017 Google
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
# ----------------------------------------------------------------------------
#
#     ***     AUTO GENERATED CODE    ***    Type: MMv1     ***
#
# ----------------------------------------------------------------------------
#
#     This file is automatically generated by Magic Modules and manual
#     changes will be clobbered when the file is regenerated.
#
#     Please read more about how to change this file at
#     https://www.github.com/GoogleCloudPlatform/magic-modules
#
# ----------------------------------------------------------------------------

from __future__ import absolute_import, division, print_function

__metaclass__ = type

################################################################################
# Documentation
################################################################################

ANSIBLE_METADATA = {'metadata_version': '1.1', 'status': ["preview"], 'supported_by': 'community'}

DOCUMENTATION = '''
---
module: gcp_compute_network_endpoint_group
description:
- Network endpoint groups (NEGs) are zonal resources that represent collections of
  IP address and port combinations for GCP resources within a single subnet. Each
  IP address and port combination is called a network endpoint.
- Network endpoint groups can be used as backends in backend services for HTTP(S),
  TCP proxy, and SSL proxy load balancers. You cannot use NEGs as a backend with internal
  load balancers. Because NEG backends allow you to specify IP addresses and ports,
  you can distribute traffic in a granular fashion among applications or containers
  running within VM instances.
- Recreating a network endpoint group that's in use by another resource will give
  a `resourceInUseByAnotherResource` error. Use `lifecycle.create_before_destroy`
  to avoid this type of error.
short_description: Creates a GCP NetworkEndpointGroup
author: Google Inc. (@googlecloudplatform)
requirements:
- python >= 2.6
- requests >= 2.18.4
- google-auth >= 1.3.0
options:
  state:
    description:
    - Whether the given object should exist in GCP
    choices:
    - present
    - absent
    default: present
    type: str
  name:
    description:
    - Name of the resource; provided by the client when the resource is created. The
      name must be 1-63 characters long, and comply with RFC1035. Specifically, the
      name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?`
      which means the first character must be a lowercase letter, and all following
      characters must be a dash, lowercase letter, or digit, except the last character,
      which cannot be a dash.
    required: true
    type: str
  description:
    description:
    - An optional description of this resource. Provide this property when you create
      the resource.
    required: false
    type: str
  network_endpoint_type:
    description:
    - Type of network endpoints in this network endpoint group.
    - 'Some valid choices include: "GCE_VM_IP_PORT"'
    required: false
    default: GCE_VM_IP_PORT
    type: str
  network:
    description:
    - The network to which all network endpoints in the NEG belong.
    - Uses "default" project network if unspecified.
    - 'This field represents a link to a Network resource in GCP. It can be specified
      in two ways. First, you can place a dictionary with key ''selfLink'' and value
      of your resource''s selfLink Alternatively, you can add `register: name-of-resource`
      to a gcp_compute_network task and then set this network field to "{{ name-of-resource
      }}"'
    required: true
    type: dict
  subnetwork:
    description:
    - Optional subnetwork to which all network endpoints in the NEG belong.
    - 'This field represents a link to a Subnetwork resource in GCP. It can be specified
      in two ways. First, you can place a dictionary with key ''selfLink'' and value
      of your resource''s selfLink Alternatively, you can add `register: name-of-resource`
      to a gcp_compute_subnetwork task and then set this subnetwork field to "{{ name-of-resource
      }}"'
    required: false
    type: dict
  default_port:
    description:
    - The default port used if the port number is not specified in the network endpoint.
    required: false
    type: int
  zone:
    description:
    - Zone where the network endpoint group is located.
    required: true
    type: str
  project:
    description:
    - The Google Cloud Platform project to use.
    type: str
  auth_kind:
    description:
    - The type of credential used.
    type: str
    required: true
    choices:
    - application
    - machineaccount
    - serviceaccount
    - accesstoken
  service_account_contents:
    description:
    - The contents of a Service Account JSON file, either in a dictionary or as a
      JSON string that represents it.
    type: jsonarg
  service_account_file:
    description:
    - The path of a Service Account JSON file if serviceaccount is selected as type.
    type: path
  service_account_email:
    description:
    - An optional service account email address if machineaccount is selected and
      the user does not wish to use the default email.
    type: str
  access_token:
    description:
    - An OAuth2 access token if credential type is accesstoken.
    type: str
  scopes:
    description:
    - Array of scopes to be used
    type: list
    elements: str
  env_type:
    description:
    - Specifies which Ansible environment you're running this module within.
    - This should not be set unless you know what you're doing.
    - This only alters the User Agent string for any API requests.
    type: str
notes:
- 'API Reference: U(https://cloud.google.com/compute/docs/reference/rest/beta/networkEndpointGroups)'
- 'Official Documentation: U(https://cloud.google.com/load-balancing/docs/negs/)'
- for authentication, you can set service_account_file using the C(GCP_SERVICE_ACCOUNT_FILE)
  env variable.
- for authentication, you can set service_account_contents using the C(GCP_SERVICE_ACCOUNT_CONTENTS)
  env variable.
- For authentication, you can set service_account_email using the C(GCP_SERVICE_ACCOUNT_EMAIL)
  env variable.
- For authentication, you can set access_token using the C(GCP_ACCESS_TOKEN)
  env variable.
- For authentication, you can set auth_kind using the C(GCP_AUTH_KIND) env variable.
- For authentication, you can set scopes using the C(GCP_SCOPES) env variable.
- Environment variables values will only be used if the playbook values are not set.
- The I(service_account_email) and I(service_account_file) options are mutually exclusive.
'''

EXAMPLES = '''
- name: create a network
  google.cloud.gcp_compute_network:
    name: "{{ resource_name }}"
    auto_create_subnetworks: 'false'
    project: "{{ gcp_project }}"
    auth_kind: "{{ gcp_cred_kind }}"
    service_account_file: "{{ gcp_cred_file }}"
    state: present
  register: network

- name: create a subnetwork
  google.cloud.gcp_compute_subnetwork:
    name: "{{ resource_name }}"
    ip_cidr_range: 10.0.0.0/16
    region: us-central1
    network: "{{ network }}"
    project: "{{ gcp_project }}"
    auth_kind: "{{ gcp_cred_kind }}"
    service_account_file: "{{ gcp_cred_file }}"
    state: present
  register: subnetwork

- name: create a network endpoint group
  google.cloud.gcp_compute_network_endpoint_group:
    name: test_object
    network: "{{ network }}"
    subnetwork: "{{ subnetwork }}"
    default_port: 90
    zone: us-central1-a
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
'''

RETURN = '''
id:
  description:
  - The unique identifier for the resource.
  returned: success
  type: int
name:
  description:
  - Name of the resource; provided by the client when the resource is created. The
    name must be 1-63 characters long, and comply with RFC1035. Specifically, the
    name must be 1-63 characters long and match the regular expression `[a-z]([-a-z0-9]*[a-z0-9])?`
    which means the first character must be a lowercase letter, and all following
    characters must be a dash, lowercase letter, or digit, except the last character,
    which cannot be a dash.
  returned: success
  type: str
description:
  description:
  - An optional description of this resource. Provide this property when you create
    the resource.
  returned: success
  type: str
networkEndpointType:
  description:
  - Type of network endpoints in this network endpoint group.
  returned: success
  type: str
size:
  description:
  - Number of network endpoints in the network endpoint group.
  returned: success
  type: int
network:
  description:
  - The network to which all network endpoints in the NEG belong.
  - Uses "default" project network if unspecified.
  returned: success
  type: dict
subnetwork:
  description:
  - Optional subnetwork to which all network endpoints in the NEG belong.
  returned: success
  type: dict
defaultPort:
  description:
  - The default port used if the port number is not specified in the network endpoint.
  returned: success
  type: int
zone:
  description:
  - Zone where the network endpoint group is located.
  returned: success
  type: str
'''

################################################################################
# Imports
################################################################################

from ansible_collections.google.cloud.plugins.module_utils.gcp_utils import navigate_hash, GcpSession, GcpModule, GcpRequest, replace_resource_dict
import json
import time

################################################################################
# Main
################################################################################


def main():
    """Main function"""

    module = GcpModule(
        argument_spec=dict(
            state=dict(default='present', choices=['present', 'absent'], type='str'),
            name=dict(required=True, type='str'),
            description=dict(type='str'),
            network_endpoint_type=dict(default='GCE_VM_IP_PORT', type='str'),
            network=dict(required=True, type='dict'),
            subnetwork=dict(type='dict'),
            default_port=dict(type='int'),
            zone=dict(required=True, type='str'),
        )
    )

    if not module.params['scopes']:
        module.params['scopes'] = ['https://www.googleapis.com/auth/compute']

    state = module.params['state']
    kind = 'compute#networkEndpointGroup'

    fetch = fetch_resource(module, self_link(module), kind)
    changed = False

    if fetch:
        if state == 'present':
            if is_different(module, fetch):
                update(module, self_link(module), kind)
                fetch = fetch_resource(module, self_link(module), kind)
                changed = True
        else:
            delete(module, self_link(module), kind)
            fetch = {}
            changed = True
    else:
        if state == 'present':
            fetch = create(module, collection(module), kind)
            changed = True
        else:
            fetch = {}

    fetch.update({'changed': changed})

    module.exit_json(**fetch)


def create(module, link, kind):
    auth = GcpSession(module, 'compute')
    return wait_for_operation(module, auth.post(link, resource_to_request(module)))


def update(module, link, kind):
    delete(module, self_link(module), kind)
    create(module, collection(module), kind)


def delete(module, link, kind):
    auth = GcpSession(module, 'compute')
    return wait_for_operation(module, auth.delete(link))


def resource_to_request(module):
    request = {
        u'kind': 'compute#networkEndpointGroup',
        u'name': module.params.get('name'),
        u'description': module.params.get('description'),
        u'networkEndpointType': module.params.get('network_endpoint_type'),
        u'network': replace_resource_dict(module.params.get(u'network', {}), 'selfLink'),
        u'subnetwork': replace_resource_dict(module.params.get(u'subnetwork', {}), 'selfLink'),
        u'defaultPort': module.params.get('default_port'),
    }
    return_vals = {}
    for k, v in request.items():
        if v or v is False:
            return_vals[k] = v

    return return_vals


def fetch_resource(module, link, kind, allow_not_found=True):
    auth = GcpSession(module, 'compute')
    return return_if_object(module, auth.get(link), kind, allow_not_found)


def self_link(module):
    return "https://compute.googleapis.com/compute/v1/projects/{project}/zones/{zone}/networkEndpointGroups/{name}".format(**module.params)


def collection(module):
    return "https://compute.googleapis.com/compute/v1/projects/{project}/zones/{zone}/networkEndpointGroups".format(**module.params)


def return_if_object(module, response, kind, allow_not_found=False):
    # If not found, return nothing.
    if allow_not_found and response.status_code == 404:
        return None

    # If no content, return nothing.
    if response.status_code == 204:
        return None

    try:
        module.raise_for_status(response)
        result = response.json()
    except getattr(json.decoder, 'JSONDecodeError', ValueError):
        module.fail_json(msg="Invalid JSON response with error: %s" % response.text)

    if navigate_hash(result, ['error', 'errors']):
        module.fail_json(msg=navigate_hash(result, ['error', 'errors']))

    return result


def is_different(module, response):
    request = resource_to_request(module)
    response = response_to_hash(module, response)

    # Remove all output-only from response.
    response_vals = {}
    for k, v in response.items():
        if k in request:
            response_vals[k] = v

    request_vals = {}
    for k, v in request.items():
        if k in response:
            request_vals[k] = v

    return GcpRequest(request_vals) != GcpRequest(response_vals)


# Remove unnecessary properties from the response.
# This is for doing comparisons with Ansible's current parameters.
def response_to_hash(module, response):
    return {
        u'id': response.get(u'id'),
        u'name': response.get(u'name'),
        u'description': response.get(u'description'),
        u'networkEndpointType': response.get(u'networkEndpointType'),
        u'size': response.get(u'size'),
        u'network': response.get(u'network'),
        u'subnetwork': response.get(u'subnetwork'),
        u'defaultPort': response.get(u'defaultPort'),
    }


def async_op_url(module, extra_data=None):
    if extra_data is None:
        extra_data = {}
    url = "https://compute.googleapis.com/compute/v1/projects/{project}/zones/{zone}/operations/{op_id}"
    combined = extra_data.copy()
    combined.update(module.params)
    return url.format(**combined)


def wait_for_operation(module, response):
    op_result = return_if_object(module, response, 'compute#operation')
    if op_result is None:
        return {}
    status = navigate_hash(op_result, ['status'])
    wait_done = wait_for_completion(status, op_result, module)
    return fetch_resource(module, navigate_hash(wait_done, ['targetLink']), 'compute#networkEndpointGroup')


def wait_for_completion(status, op_result, module):
    op_id = navigate_hash(op_result, ['name'])
    op_uri = async_op_url(module, {'op_id': op_id})
    while status != 'DONE':
        raise_if_errors(op_result, ['error', 'errors'], module)
        time.sleep(1.0)
        op_result = fetch_resource(module, op_uri, 'compute#operation', False)
        status = navigate_hash(op_result, ['status'])
    return op_result


def raise_if_errors(response, err_path, module):
    errors = navigate_hash(response, err_path)
    if errors is not None:
        module.fail_json(msg=errors)


if __name__ == '__main__':
    main()
