#!/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_iam_role
description:
- A role in the Identity and Access Management API .
short_description: Creates a GCP Role
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:
    - The name of the role.
    required: true
    type: str
  title:
    description:
    - A human-readable title for the role. Typically this is limited to 100 UTF-8
      bytes.
    required: false
    type: str
  description:
    description:
    - Human-readable description for the role.
    required: false
    type: str
  included_permissions:
    description:
    - Names of permissions this role grants when bound in an IAM policy.
    elements: str
    required: false
    type: list
  stage:
    description:
    - The current launch stage of the role.
    - 'Some valid choices include: "ALPHA", "BETA", "GA", "DEPRECATED", "DISABLED",
      "EAP"'
    required: false
    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
"""

EXAMPLES = """
- name: create a role
  google.cloud.gcp_iam_role:
    name: myCustomRole2
    title: My Custom Role
    description: My custom role description
    included_permissions:
    - iam.roles.list
    - iam.roles.create
    - iam.roles.delete
    project: test_project
    auth_kind: serviceaccount
    service_account_file: "/tmp/auth.pem"
    state: present
"""

RETURN = """
name:
  description:
  - The name of the role.
  returned: success
  type: str
title:
  description:
  - A human-readable title for the role. Typically this is limited to 100 UTF-8 bytes.
  returned: success
  type: str
description:
  description:
  - Human-readable description for the role.
  returned: success
  type: str
includedPermissions:
  description:
  - Names of permissions this role grants when bound in an IAM policy.
  returned: success
  type: list
stage:
  description:
  - The current launch stage of the role.
  returned: success
  type: str
deleted:
  description:
  - The current deleted state of the role.
  returned: success
  type: bool
"""

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

from ansible_collections.google.cloud.plugins.module_utils.gcp_utils import (
    navigate_hash,
    GcpSession,
    GcpModule,
    GcpRequest,
)
import json

################################################################################
# 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"),
            title=dict(type="str"),
            description=dict(type="str"),
            included_permissions=dict(type="list", elements="str"),
            stage=dict(type="str"),
        )
    )

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

    state = module.params["state"]

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

    if fetch:
        if state == "present":
            if fetch.get("deleted"):
                undelete(module, self_link(module), fetch["etag"])
                changed = True
            elif is_different(module, fetch):
                update(module, self_link(module), fetch)
                fetch = fetch_resource(module, self_link(module))
                changed = True
        elif not fetch.get("deleted"):
            delete(module, self_link(module))
            fetch = {}
            changed = True
    else:
        if state == "present":
            fetch = create(module, collection(module))
            changed = True
        else:
            fetch = {}

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

    module.exit_json(**fetch)


def create(module, link):
    auth = GcpSession(module, "iam")
    return return_if_object(module, auth.post(link, resource_to_create(module)))


def undelete(module, link, etag):
    auth = GcpSession(module, "iam")
    return return_if_object(module, auth.post(link + ":undelete", {
        "etag": etag
    }))


def update(module, link, fetch):
    auth = GcpSession(module, "iam")
    params = {
        "updateMask": updateMask(
            resource_to_request(module), response_to_hash(module, fetch)
        )
    }
    request = resource_to_request(module)
    del request["name"]
    return return_if_object(module, auth.patch(link, request, params=params))


def updateMask(request, response):
    update_mask = []
    if request.get("name") != response.get("name"):
        update_mask.append("name")
    if request.get("title") != response.get("title"):
        update_mask.append("title")
    if request.get("description") != response.get("description"):
        update_mask.append("description")
    if request.get("includedPermissions") != response.get("includedPermissions"):
        update_mask.append("includedPermissions")
    if request.get("stage") != response.get("stage"):
        update_mask.append("stage")
    return ",".join(update_mask)


def delete(module, link):
    auth = GcpSession(module, "iam")
    return return_if_object(module, auth.delete(link), allow_not_found=True)


def resource_to_request(module):
    request = {
        "name": module.params.get("name"),
        "title": module.params.get("title"),
        "description": module.params.get("description"),
        "includedPermissions": module.params.get("included_permissions"),
        "stage": module.params.get("stage"),
    }
    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, allow_not_found=True):
    auth = GcpSession(module, "iam")
    return return_if_object(module, auth.get(link), allow_not_found)


def self_link(module):
    return "https://iam.googleapis.com/v1/projects/{project}/roles/{name}".format(
        **module.params
    )


def collection(module):
    return "https://iam.googleapis.com/v1/projects/{project}/roles".format(
        **module.params
    )


def return_if_object(module, response, 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

    # catches and edge case specific to IAM roles where the role not
    # existing returns 400.
    if (allow_not_found and response.status_code == 400
       and "You can't delete role_id" in response.text):
        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)

    result = decode_response(result, module)

    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)
    request = decode_response(request, module)

    # 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 {
        "name": response.get("name"),
        "title": response.get("title"),
        "description": response.get("description"),
        "includedPermissions": response.get("includedPermissions"),
        "stage": response.get("stage"),
        "deleted": response.get("deleted"),
    }


def resource_to_create(module):
    role = resource_to_request(module)
    del role["name"]
    return {"roleId": module.params["name"], "role": role}


def decode_response(response, module):
    if "name" in response:
        response["name"] = response["name"].split("/")[-1]
    return response


if __name__ == "__main__":
    main()
