#!/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_health_check
description:
    - An HealthCheck resource. This resource defines a template for how individual virtual
      machines should be checked for health, via one of the supported protocols.
short_description: Creates a GCP HealthCheck
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'
    check_interval_sec:
        description:
            - How often (in seconds) to send a health check. The default value is 5 seconds.
        required: false
        default: 5
    description:
        description:
            - An optional description of this resource. Provide this property when you create
              the resource.
        required: false
    healthy_threshold:
        description:
            - A so-far unhealthy instance will be marked healthy after this many consecutive successes.
              The default value is 2.
        required: false
    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: false
    timeout_sec:
        description:
            - How long (in seconds) to wait before claiming failure.
            - The default value is 5 seconds.  It is invalid for timeoutSec to have greater value
              than checkIntervalSec.
        required: false
        default: 5
        aliases: [timeout_seconds]
    unhealthy_threshold:
        description:
            - A so-far healthy instance will be marked unhealthy after this many consecutive failures.
              The default value is 2.
        required: false
        default: 2
    type:
        description:
            - Specifies the type of the healthCheck, either TCP, SSL, HTTP or HTTPS. If not specified,
              the default is TCP. Exactly one of the protocol-specific health check field must
              be specified, which must match type field.
        required: false
        choices: ['TCP', 'SSL', 'HTTP']
    http_health_check:
        description:
            - A nested object resource.
        required: false
        suboptions:
            host:
                description:
                    - The value of the host header in the HTTP health check request.
                    - If left empty (default value), the public IP on behalf of which this health check
                      is performed will be used.
                required: false
            request_path:
                description:
                    - The request path of the HTTP health check request.
                    - The default value is /.
                required: false
            port:
                description:
                    - The TCP port number for the HTTP health check request.
                    - The default value is 80.
                required: false
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                required: false
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                required: false
                choices: ['NONE', 'PROXY_V1']
    https_health_check:
        description:
            - A nested object resource.
        required: false
        suboptions:
            host:
                description:
                    - The value of the host header in the HTTPS health check request.
                    - If left empty (default value), the public IP on behalf of which this health check
                      is performed will be used.
                required: false
            request_path:
                description:
                    - The request path of the HTTPS health check request.
                    - The default value is /.
                required: false
            port:
                description:
                    - The TCP port number for the HTTPS health check request.
                    - The default value is 443.
                required: false
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                required: false
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                required: false
                choices: ['NONE', 'PROXY_V1']
    tcp_health_check:
        description:
            - A nested object resource.
        required: false
        suboptions:
            request:
                description:
                    - The application data to send once the TCP connection has been established (default
                      value is empty). If both request and response are empty, the connection establishment
                      alone will indicate health. The request data can only be ASCII.
                required: false
            response:
                description:
                    - The bytes to match against the beginning of the response data. If left empty (the
                      default value), any response will indicate health. The response data can only be
                      ASCII.
                required: false
            port:
                description:
                    - The TCP port number for the TCP health check request.
                    - The default value is 443.
                required: false
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                required: false
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                required: false
                choices: ['NONE', 'PROXY_V1']
    ssl_health_check:
        description:
            - A nested object resource.
        required: false
        suboptions:
            request:
                description:
                    - The application data to send once the SSL connection has been established (default
                      value is empty). If both request and response are empty, the connection establishment
                      alone will indicate health. The request data can only be ASCII.
                required: false
            response:
                description:
                    - The bytes to match against the beginning of the response data. If left empty (the
                      default value), any response will indicate health. The response data can only be
                      ASCII.
                required: false
            port:
                description:
                    - The TCP port number for the SSL health check request.
                    - The default value is 443.
                required: false
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                required: false
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                required: false
                choices: ['NONE', 'PROXY_V1']
extends_documentation_fragment: gcp
'''

EXAMPLES = '''
- name: create a health check
  gcp_compute_health_check:
      name: "test_object"
      type: TCP
      tcp_health_check:
        port_name: service-health
        request: ping
        response: pong
      healthy_threshold: 10
      timeout_sec: 2
      unhealthy_threshold: 5
      project: "test_project"
      auth_kind: "service_account"
      service_account_file: "/tmp/auth.pem"
      state: present
'''

RETURN = '''
    check_interval_sec:
        description:
            - How often (in seconds) to send a health check. The default value is 5 seconds.
        returned: success
        type: int
    creation_timestamp:
        description:
            - Creation timestamp in RFC3339 text format.
        returned: success
        type: str
    description:
        description:
            - An optional description of this resource. Provide this property when you create
              the resource.
        returned: success
        type: str
    healthy_threshold:
        description:
            - A so-far unhealthy instance will be marked healthy after this many consecutive successes.
              The default value is 2.
        returned: success
        type: int
    id:
        description:
            - The unique identifier for the resource. This identifier is defined by the server.
        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
    timeout_sec:
        description:
            - How long (in seconds) to wait before claiming failure.
            - The default value is 5 seconds.  It is invalid for timeoutSec to have greater value
              than checkIntervalSec.
        returned: success
        type: int
    unhealthy_threshold:
        description:
            - A so-far healthy instance will be marked unhealthy after this many consecutive failures.
              The default value is 2.
        returned: success
        type: int
    type:
        description:
            - Specifies the type of the healthCheck, either TCP, SSL, HTTP or HTTPS. If not specified,
              the default is TCP. Exactly one of the protocol-specific health check field must
              be specified, which must match type field.
        returned: success
        type: str
    http_health_check:
        description:
            - A nested object resource.
        returned: success
        type: complex
        contains:
            host:
                description:
                    - The value of the host header in the HTTP health check request.
                    - If left empty (default value), the public IP on behalf of which this health check
                      is performed will be used.
                returned: success
                type: str
            request_path:
                description:
                    - The request path of the HTTP health check request.
                    - The default value is /.
                returned: success
                type: str
            port:
                description:
                    - The TCP port number for the HTTP health check request.
                    - The default value is 80.
                returned: success
                type: int
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                returned: success
                type: str
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                returned: success
                type: str
    https_health_check:
        description:
            - A nested object resource.
        returned: success
        type: complex
        contains:
            host:
                description:
                    - The value of the host header in the HTTPS health check request.
                    - If left empty (default value), the public IP on behalf of which this health check
                      is performed will be used.
                returned: success
                type: str
            request_path:
                description:
                    - The request path of the HTTPS health check request.
                    - The default value is /.
                returned: success
                type: str
            port:
                description:
                    - The TCP port number for the HTTPS health check request.
                    - The default value is 443.
                returned: success
                type: int
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                returned: success
                type: str
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                returned: success
                type: str
    tcp_health_check:
        description:
            - A nested object resource.
        returned: success
        type: complex
        contains:
            request:
                description:
                    - The application data to send once the TCP connection has been established (default
                      value is empty). If both request and response are empty, the connection establishment
                      alone will indicate health. The request data can only be ASCII.
                returned: success
                type: str
            response:
                description:
                    - The bytes to match against the beginning of the response data. If left empty (the
                      default value), any response will indicate health. The response data can only be
                      ASCII.
                returned: success
                type: str
            port:
                description:
                    - The TCP port number for the TCP health check request.
                    - The default value is 443.
                returned: success
                type: int
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                returned: success
                type: str
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                returned: success
                type: str
    ssl_health_check:
        description:
            - A nested object resource.
        returned: success
        type: complex
        contains:
            request:
                description:
                    - The application data to send once the SSL connection has been established (default
                      value is empty). If both request and response are empty, the connection establishment
                      alone will indicate health. The request data can only be ASCII.
                returned: success
                type: str
            response:
                description:
                    - The bytes to match against the beginning of the response data. If left empty (the
                      default value), any response will indicate health. The response data can only be
                      ASCII.
                returned: success
                type: str
            port:
                description:
                    - The TCP port number for the SSL health check request.
                    - The default value is 443.
                returned: success
                type: int
            port_name:
                description:
                    - Port name as defined in InstanceGroup#NamedPort#name. If both port and port_name
                      are defined, port takes precedence.
                returned: success
                type: str
            proxy_header:
                description:
                    - Specifies the type of proxy header to append before sending data to the backend,
                      either NONE or PROXY_V1. The default is NONE.
                returned: success
                type: str
'''

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

from ansible.module_utils.gcp_utils import navigate_hash, GcpSession, GcpModule, GcpRequest, remove_nones_from_dict, 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'),
            check_interval_sec=dict(default=5, type='int'),
            description=dict(type='str'),
            healthy_threshold=dict(type='int'),
            name=dict(type='str'),
            timeout_sec=dict(default=5, type='int', aliases=['timeout_seconds']),
            unhealthy_threshold=dict(default=2, type='int'),
            type=dict(type='str', choices=['TCP', 'SSL', 'HTTP']),
            http_health_check=dict(type='dict', options=dict(
                host=dict(type='str'),
                request_path=dict(type='str'),
                port=dict(type='int'),
                port_name=dict(type='str'),
                proxy_header=dict(type='str', choices=['NONE', 'PROXY_V1'])
            )),
            https_health_check=dict(type='dict', options=dict(
                host=dict(type='str'),
                request_path=dict(type='str'),
                port=dict(type='int'),
                port_name=dict(type='str'),
                proxy_header=dict(type='str', choices=['NONE', 'PROXY_V1'])
            )),
            tcp_health_check=dict(type='dict', options=dict(
                request=dict(type='str'),
                response=dict(type='str'),
                port=dict(type='int'),
                port_name=dict(type='str'),
                proxy_header=dict(type='str', choices=['NONE', 'PROXY_V1'])
            )),
            ssl_health_check=dict(type='dict', options=dict(
                request=dict(type='str'),
                response=dict(type='str'),
                port=dict(type='int'),
                port_name=dict(type='str'),
                proxy_header=dict(type='str', choices=['NONE', 'PROXY_V1'])
            ))
        )
    )

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

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

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

    if fetch:
        if state == 'present':
            if is_different(module, fetch):
                fetch = update(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):
    auth = GcpSession(module, 'compute')
    return wait_for_operation(module, auth.put(link, resource_to_request(module)))


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#healthCheck',
        u'checkIntervalSec': module.params.get('check_interval_sec'),
        u'description': module.params.get('description'),
        u'healthyThreshold': module.params.get('healthy_threshold'),
        u'name': module.params.get('name'),
        u'timeoutSec': module.params.get('timeout_sec'),
        u'unhealthyThreshold': module.params.get('unhealthy_threshold'),
        u'type': module.params.get('type'),
        u'httpHealthCheck': HealthCheckHttpHealthCheck(module.params.get('http_health_check', {}), module).to_request(),
        u'httpsHealthCheck': HealthCheckHttpsHealthCheck(module.params.get('https_health_check', {}), module).to_request(),
        u'tcpHealthCheck': HealthCheckTcpHealthCheck(module.params.get('tcp_health_check', {}), module).to_request(),
        u'sslHealthCheck': HealthCheckSslHealthCheck(module.params.get('ssl_health_check', {}), module).to_request()
    }
    return_vals = {}
    for k, v in request.items():
        if v:
            return_vals[k] = v

    return return_vals


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


def self_link(module):
    return "https://www.googleapis.com/compute/v1/projects/{project}/global/healthChecks/{name}".format(**module.params)


def collection(module):
    return "https://www.googleapis.com/compute/v1/projects/{project}/global/healthChecks".format(**module.params)


def return_if_object(module, response, kind):
    # If not found, return nothing.
    if 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) as inst:
        module.fail_json(msg="Invalid JSON response with error: %s" % inst)

    if navigate_hash(result, ['error', 'errors']):
        module.fail_json(msg=navigate_hash(result, ['error', 'errors']))
    if result['kind'] != kind:
        module.fail_json(msg="Incorrect result: {kind}".format(**result))

    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'checkIntervalSec': response.get(u'checkIntervalSec'),
        u'creationTimestamp': response.get(u'creationTimestamp'),
        u'description': response.get(u'description'),
        u'healthyThreshold': response.get(u'healthyThreshold'),
        u'id': response.get(u'id'),
        u'name': response.get(u'name'),
        u'timeoutSec': response.get(u'timeoutSec'),
        u'unhealthyThreshold': response.get(u'unhealthyThreshold'),
        u'type': response.get(u'type'),
        u'httpHealthCheck': HealthCheckHttpHealthCheck(response.get(u'httpHealthCheck', {}), module).from_response(),
        u'httpsHealthCheck': HealthCheckHttpsHealthCheck(response.get(u'httpsHealthCheck', {}), module).from_response(),
        u'tcpHealthCheck': HealthCheckTcpHealthCheck(response.get(u'tcpHealthCheck', {}), module).from_response(),
        u'sslHealthCheck': HealthCheckSslHealthCheck(response.get(u'sslHealthCheck', {}), module).from_response()
    }


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


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'], 'message')
        time.sleep(1.0)
        if status not in ['PENDING', 'RUNNING', 'DONE']:
            module.fail_json(msg="Invalid result %s" % status)
        op_result = fetch_resource(module, op_uri, 'compute#operation')
        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)


class HealthCheckHttpHealthCheck(object):
    def __init__(self, request, module):
        self.module = module
        if request:
            self.request = request
        else:
            self.request = {}

    def to_request(self):
        return remove_nones_from_dict({
            u'host': self.request.get('host'),
            u'requestPath': self.request.get('request_path'),
            u'port': self.request.get('port'),
            u'portName': self.request.get('port_name'),
            u'proxyHeader': self.request.get('proxy_header')
        })

    def from_response(self):
        return remove_nones_from_dict({
            u'host': self.request.get(u'host'),
            u'requestPath': self.request.get(u'requestPath'),
            u'port': self.request.get(u'port'),
            u'portName': self.request.get(u'portName'),
            u'proxyHeader': self.request.get(u'proxyHeader')
        })


class HealthCheckHttpsHealthCheck(object):
    def __init__(self, request, module):
        self.module = module
        if request:
            self.request = request
        else:
            self.request = {}

    def to_request(self):
        return remove_nones_from_dict({
            u'host': self.request.get('host'),
            u'requestPath': self.request.get('request_path'),
            u'port': self.request.get('port'),
            u'portName': self.request.get('port_name'),
            u'proxyHeader': self.request.get('proxy_header')
        })

    def from_response(self):
        return remove_nones_from_dict({
            u'host': self.request.get(u'host'),
            u'requestPath': self.request.get(u'requestPath'),
            u'port': self.request.get(u'port'),
            u'portName': self.request.get(u'portName'),
            u'proxyHeader': self.request.get(u'proxyHeader')
        })


class HealthCheckTcpHealthCheck(object):
    def __init__(self, request, module):
        self.module = module
        if request:
            self.request = request
        else:
            self.request = {}

    def to_request(self):
        return remove_nones_from_dict({
            u'request': self.request.get('request'),
            u'response': self.request.get('response'),
            u'port': self.request.get('port'),
            u'portName': self.request.get('port_name'),
            u'proxyHeader': self.request.get('proxy_header')
        })

    def from_response(self):
        return remove_nones_from_dict({
            u'request': self.request.get(u'request'),
            u'response': self.request.get(u'response'),
            u'port': self.request.get(u'port'),
            u'portName': self.request.get(u'portName'),
            u'proxyHeader': self.request.get(u'proxyHeader')
        })


class HealthCheckSslHealthCheck(object):
    def __init__(self, request, module):
        self.module = module
        if request:
            self.request = request
        else:
            self.request = {}

    def to_request(self):
        return remove_nones_from_dict({
            u'request': self.request.get('request'),
            u'response': self.request.get('response'),
            u'port': self.request.get('port'),
            u'portName': self.request.get('port_name'),
            u'proxyHeader': self.request.get('proxy_header')
        })

    def from_response(self):
        return remove_nones_from_dict({
            u'request': self.request.get(u'request'),
            u'response': self.request.get(u'response'),
            u'port': self.request.get(u'port'),
            u'portName': self.request.get(u'portName'),
            u'proxyHeader': self.request.get(u'proxyHeader')
        })


if __name__ == '__main__':
    main()
