#!/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    ***    AUTO GENERATED CODE     ***
#
# ----------------------------------------------------------------------------
#
#     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_address
description:
- Represents an Address resource.
- Each virtual machine instance has an ephemeral internal IP address and, optionally,
  an external IP address. To communicate between instances on the same network, you
  can use an instance's internal IP address. To communicate with the Internet and
  instances outside of the same network, you must specify the instance's external
  IP address.
- Internal IP addresses are ephemeral and only belong to an instance for the lifetime
  of the instance; if the instance is deleted and recreated, the instance is assigned
  a new internal IP address, either by Compute Engine or by you. External IP addresses
  can be either ephemeral or static.
short_description: Creates a GCP Address
version_added: 2.6
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
  address:
    description:
    - The static external IP address represented by this resource. Only IPv4 is supported.
      An address may only be specified for INTERNAL address types. The IP address
      must be inside the specified subnetwork, if any.
    required: false
    type: str
  address_type:
    description:
    - The type of address to reserve, either INTERNAL or EXTERNAL.
    - If unspecified, defaults to EXTERNAL.
    - 'Some valid choices include: "INTERNAL", "EXTERNAL"'
    required: false
    default: EXTERNAL
    type: str
    version_added: 2.7
  description:
    description:
    - An optional description of this resource.
    required: false
    type: str
  name:
    description:
    - Name of the resource. 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
  network_tier:
    description:
    - 'The networking tier used for configuring this address. This field can take
      the following values: PREMIUM or STANDARD. If this field is not specified, it
      is assumed to be PREMIUM.'
    - 'Some valid choices include: "PREMIUM", "STANDARD"'
    required: false
    type: str
    version_added: 2.8
  subnetwork:
    description:
    - The URL of the subnetwork in which to reserve the address. If an IP address
      is specified, it must be within the subnetwork's IP range.
    - This field can only be used with INTERNAL type with GCE_ENDPOINT/DNS_RESOLVER
      purposes.
    - '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
    version_added: 2.7
  region:
    description:
    - URL of the region where the regional address resides.
    - This field is not applicable to global addresses.
    required: true
    type: str
extends_documentation_fragment: gcp
notes:
- 'API Reference: U(https://cloud.google.com/compute/docs/reference/beta/addresses)'
- 'Reserving a Static External IP Address: U(https://cloud.google.com/compute/docs/instances-and-network)'
- 'Reserving a Static Internal IP Address: U(https://cloud.google.com/compute/docs/ip-addresses/reserve-static-internal-ip-address)'
'''

EXAMPLES = '''
- name: create a address
  gcp_compute_address:
    name: test-address1
    region: us-west1
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
'''

RETURN = '''
address:
  description:
  - The static external IP address represented by this resource. Only IPv4 is supported.
    An address may only be specified for INTERNAL address types. The IP address must
    be inside the specified subnetwork, if any.
  returned: success
  type: str
addressType:
  description:
  - The type of address to reserve, either INTERNAL or EXTERNAL.
  - If unspecified, defaults to EXTERNAL.
  returned: success
  type: str
creationTimestamp:
  description:
  - Creation timestamp in RFC3339 text format.
  returned: success
  type: str
description:
  description:
  - An optional description of this resource.
  returned: success
  type: str
id:
  description:
  - The unique identifier for the resource.
  returned: success
  type: int
name:
  description:
  - Name of the resource. 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
networkTier:
  description:
  - 'The networking tier used for configuring this address. This field can take the
    following values: PREMIUM or STANDARD. If this field is not specified, it is assumed
    to be PREMIUM.'
  returned: success
  type: str
subnetwork:
  description:
  - The URL of the subnetwork in which to reserve the address. If an IP address is
    specified, it must be within the subnetwork's IP range.
  - This field can only be used with INTERNAL type with GCE_ENDPOINT/DNS_RESOLVER
    purposes.
  returned: success
  type: dict
users:
  description:
  - The URLs of the resources that are using this address.
  returned: success
  type: list
region:
  description:
  - URL of the region where the regional address resides.
  - This field is not applicable to global addresses.
  returned: success
  type: str
'''

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

from ansible.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'),
            address=dict(type='str'),
            address_type=dict(default='EXTERNAL', type='str'),
            description=dict(type='str'),
            name=dict(required=True, type='str'),
            network_tier=dict(type='str'),
            subnetwork=dict(type='dict'),
            region=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#address'

    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#address',
        u'address': module.params.get('address'),
        u'addressType': module.params.get('address_type'),
        u'description': module.params.get('description'),
        u'name': module.params.get('name'),
        u'networkTier': module.params.get('network_tier'),
        u'subnetwork': replace_resource_dict(module.params.get(u'subnetwork', {}), 'selfLink'),
    }
    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://www.googleapis.com/compute/v1/projects/{project}/regions/{region}/addresses/{name}".format(**module.params)


def collection(module):
    return "https://www.googleapis.com/compute/v1/projects/{project}/regions/{region}/addresses".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'address': response.get(u'address'),
        u'addressType': response.get(u'addressType'),
        u'creationTimestamp': response.get(u'creationTimestamp'),
        u'description': response.get(u'description'),
        u'id': response.get(u'id'),
        u'name': response.get(u'name'),
        u'networkTier': response.get(u'networkTier'),
        u'subnetwork': response.get(u'subnetwork'),
        u'users': response.get(u'users'),
    }


def async_op_url(module, extra_data=None):
    if extra_data is None:
        extra_data = {}
    url = "https://www.googleapis.com/compute/v1/projects/{project}/regions/{region}/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#address')


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()
