# Copyright: Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type


DOCUMENTATION = r'''
---
module: ec2_vpc_igw_info
version_added: 1.0.0
short_description: Gather information about internet gateways in AWS
description:
    - Gather information about internet gateways in AWS.
author: "Nick Aslanidis (@naslanidis)"
options:
  filters:
    description:
      - A dict of filters to apply. Each dict item consists of a filter key and a filter value.
        See U(https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeInternetGateways.html) for possible filters.
    type: dict
    default: {}
  internet_gateway_ids:
    description:
      - Get details of specific Internet Gateway ID. Provide this value as a list.
    type: list
    elements: str
  convert_tags:
    description:
      - Convert tags from boto3 format (list of dictionaries) to the standard dictionary format.
      - Prior to release 4.0.0 this defaulted to C(False).
    default: True
    type: bool
    version_added: 1.3.0
extends_documentation_fragment:
- amazon.aws.aws
- amazon.aws.ec2
- amazon.aws.boto3
'''

EXAMPLES = r'''
# # Note: These examples do not set authentication details, see the AWS Guide for details.

- name: Gather information about all Internet Gateways for an account or profile
  amazon.aws.ec2_vpc_igw_info:
    region: ap-southeast-2
    profile: production
  register: igw_info

- name: Gather information about a filtered list of Internet Gateways
  amazon.aws.ec2_vpc_igw_info:
    region: ap-southeast-2
    profile: production
    filters:
        "tag:Name": "igw-123"
  register: igw_info

- name: Gather information about a specific internet gateway by InternetGatewayId
  amazon.aws.ec2_vpc_igw_info:
    region: ap-southeast-2
    profile: production
    internet_gateway_ids: igw-c1231234
  register: igw_info
'''

RETURN = r'''
changed:
    description: True if listing the internet gateways succeeds.
    type: bool
    returned: always
    sample: "false"
internet_gateways:
    description: The internet gateways for the account.
    returned: always
    type: complex
    contains:
        attachments:
            description: Any VPCs attached to the internet gateway.
            returned: I(state=present)
            type: complex
            contains:
                state:
                    description: The current state of the attachment.
                    returned: I(state=present)
                    type: str
                    sample: available
                vpc_id:
                    description: The ID of the VPC.
                    returned: I(state=present)
                    type: str
                    sample: vpc-02123b67
        internet_gateway_id:
            description: The ID of the internet gateway.
            returned: I(state=present)
            type: str
            sample: igw-2123634d
        tags:
            description: Any tags assigned to the internet gateway.
            returned: I(state=present)
            type: dict
            sample:
                tags:
                    "Ansible": "Test"
'''

try:
    import botocore
except ImportError:
    pass  # Handled by AnsibleAWSModule

from ansible_collections.amazon.aws.plugins.module_utils.core import AnsibleAWSModule
from ansible_collections.amazon.aws.plugins.module_utils.core import is_boto3_error_code
from ansible_collections.amazon.aws.plugins.module_utils.ec2 import AWSRetry
from ansible_collections.amazon.aws.plugins.module_utils.ec2 import boto3_tag_list_to_ansible_dict
from ansible_collections.amazon.aws.plugins.module_utils.ec2 import ansible_dict_to_boto3_filter_list
from ansible_collections.amazon.aws.plugins.module_utils.ec2 import camel_dict_to_snake_dict


def get_internet_gateway_info(internet_gateway, convert_tags):
    if convert_tags:
        tags = boto3_tag_list_to_ansible_dict(internet_gateway['Tags'])
        ignore_list = ["Tags"]
    else:
        tags = internet_gateway['Tags']
        ignore_list = []
    internet_gateway_info = {'InternetGatewayId': internet_gateway['InternetGatewayId'],
                             'Attachments': internet_gateway['Attachments'],
                             'Tags': tags}

    internet_gateway_info = camel_dict_to_snake_dict(internet_gateway_info, ignore_list=ignore_list)
    return internet_gateway_info


def list_internet_gateways(connection, module):
    params = dict()

    params['Filters'] = ansible_dict_to_boto3_filter_list(module.params.get('filters'))
    convert_tags = module.params.get('convert_tags')

    if module.params.get("internet_gateway_ids"):
        params['InternetGatewayIds'] = module.params.get("internet_gateway_ids")

    try:
        all_internet_gateways = connection.describe_internet_gateways(aws_retry=True, **params)
    except is_boto3_error_code('InvalidInternetGatewayID.NotFound'):
        module.fail_json('InternetGateway not found')
    except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:  # pylint: disable=duplicate-except
        module.fail_json_aws(e, 'Unable to describe internet gateways')

    return [get_internet_gateway_info(igw, convert_tags)
            for igw in all_internet_gateways['InternetGateways']]


def main():
    argument_spec = dict(
        filters=dict(type='dict', default=dict()),
        internet_gateway_ids=dict(type='list', default=None, elements='str'),
        convert_tags=dict(type='bool', default=True),
    )

    module = AnsibleAWSModule(argument_spec=argument_spec, supports_check_mode=True)

    # Validate Requirements
    try:
        connection = module.client('ec2', retry_decorator=AWSRetry.jittered_backoff())
    except (botocore.exceptions.ClientError, botocore.exceptions.BotoCoreError) as e:
        module.fail_json_aws(e, msg='Failed to connect to AWS')

    # call your function here
    results = list_internet_gateways(connection, module)

    module.exit_json(internet_gateways=results)


if __name__ == '__main__':
    main()