#!/usr/bin/python
# -*- coding: utf-8 -*-
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

ANSIBLE_METADATA = {'metadata_version': '1.0',
                    'status': ['preview'],
                    'supported_by': 'community'}


DOCUMENTATION = '''
---
module: ec2_ami_copy
short_description: copies AMI between AWS regions, return new image id
description:
    - Copies AMI from a source region to a destination region. B(Since version 2.3 this module depends on boto3.)
version_added: "2.0"
options:
  source_region:
    description:
      - The source region the AMI should be copied from.
    required: true
  source_image_id:
    description:
      - The ID of the AMI in source region that should be copied.
    required: true
  name:
    description:
      - The name of the new AMI to copy. (As of 2.3 the default is 'default', in prior versions it was 'null'.)
    required: false
    default: "default"
  description:
    description:
      - An optional human-readable string describing the contents and purpose of the new AMI.
    required: false
    default: null
  encrypted:
    description:
      - Whether or not the destination snapshots of the copied AMI should be encrypted.
    required: false
    default: null
    version_added: "2.2"
  kms_key_id:
    description:
      - KMS key id used to encrypt image. If not specified, uses default EBS Customer Master Key (CMK) for your account.
    required: false
    default: null
    version_added: "2.2"
  wait:
    description:
      - Wait for the copied AMI to be in state 'available' before returning.
    required: false
    default: "no"
    choices: [ "yes", "no" ]
  wait_timeout:
    description:
      - How long before wait gives up, in seconds. (As of 2.3 this option is deprecated. See boto3 Waiters)
    required: false
    default: 1200
  tags:
    description:
      - A hash/dictionary of tags to add to the new copied AMI; '{"key":"value"}' and '{"key":"value","key":"value"}'
    required: false
    default: null
author: "Amir Moulavi <amir.moulavi@gmail.com>, Tim C <defunct@defunct.io>"
extends_documentation_fragment:
    - aws
    - ec2
requirements:
    - boto3
'''

EXAMPLES = '''
# Basic AMI Copy
- ec2_ami_copy:
    source_region: us-east-1
    region: eu-west-1
    source_image_id: ami-xxxxxxx

# AMI copy wait until available
- ec2_ami_copy:
    source_region: us-east-1
    region: eu-west-1
    source_image_id: ami-xxxxxxx
    wait: yes
  register: image_id

# Named AMI copy
- ec2_ami_copy:
    source_region: us-east-1
    region: eu-west-1
    source_image_id: ami-xxxxxxx
    name: My-Awesome-AMI
    description: latest patch

# Tagged AMI copy
- ec2_ami_copy:
    source_region: us-east-1
    region: eu-west-1
    source_image_id: ami-xxxxxxx
    tags:
        Name: My-Super-AMI
        Patch: 1.2.3

# Encrypted AMI copy
- ec2_ami_copy:
    source_region: us-east-1
    region: eu-west-1
    source_image_id: ami-xxxxxxx
    encrypted: yes

# Encrypted AMI copy with specified key
- ec2_ami_copy:
    source_region: us-east-1
    region: eu-west-1
    source_image_id: ami-xxxxxxx
    encrypted: yes
    kms_key_id: arn:aws:kms:us-east-1:XXXXXXXXXXXX:key/746de6ea-50a4-4bcb-8fbc-e3b29f2d367b
'''

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.ec2 import (boto3_conn, ec2_argument_spec, get_aws_connection_info)

try:
    import boto
    import boto.ec2
    HAS_BOTO = True
except ImportError:
    HAS_BOTO = False

try:
    import boto3
    from botocore.exceptions import ClientError, NoCredentialsError, NoRegionError, WaiterError
    HAS_BOTO3 = True
except ImportError:
    HAS_BOTO3 = False



def copy_image(module, ec2):
    """
    Copies an AMI

    module : AnsibleModule object
    ec2: ec2 connection object
    """

    tags = module.params.get('tags')

    params = {'SourceRegion': module.params.get('source_region'),
              'SourceImageId': module.params.get('source_image_id'),
              'Name': module.params.get('name'),
              'Description': module.params.get('description'),
              'Encrypted': module.params.get('encrypted'),
              }
    if module.params.get('kms_key_id'):
        params['KmsKeyId'] = module.params.get('kms_key_id')

    try:
        image_id = ec2.copy_image(**params)['ImageId']
        if module.params.get('wait'):
            ec2.get_waiter('image_available').wait(ImageIds=[image_id])
        if module.params.get('tags'):
            ec2.create_tags(
                Resources=[image_id],
                Tags=[{'Key' : k, 'Value': v} for k,v in module.params.get('tags').items()]
                )

        module.exit_json(changed=True, image_id=image_id)
    except WaiterError as we:
        module.fail_json(msg='An error occured waiting for the image to become available. (%s)' %  we.reason)
    except ClientError as ce:
        module.fail_json(msg=ce.message)
    except NoCredentialsError:
        module.fail_json(msg='Unable to authenticate, AWS credentials are invalid.')
    except Exception as e:
        module.fail_json(msg='Unhandled exception. (%s)' % str(e))


def main():
    argument_spec = ec2_argument_spec()
    argument_spec.update(dict(
        source_region=dict(required=True),
        source_image_id=dict(required=True),
        name=dict(default='default'),
        description=dict(default=''),
        encrypted=dict(type='bool', default=False, required=False),
        kms_key_id=dict(type='str', required=False),
        wait=dict(type='bool', default=False),
        wait_timeout=dict(default=1200),
        tags=dict(type='dict')))

    module = AnsibleModule(argument_spec=argument_spec)

    if not HAS_BOTO:
        module.fail_json(msg='boto required for this module')
    # TODO: Check botocore version
    region, ec2_url, aws_connect_params = get_aws_connection_info(module, boto3=True)

    if HAS_BOTO3:

        try:
            ec2 = boto3_conn(module, conn_type='client', resource='ec2', region=region, endpoint=ec2_url,
                             **aws_connect_params)
        except NoRegionError:
            module.fail_json(msg='AWS Region is required')
    else:
        module.fail_json(msg='boto3 required for this module')

    copy_image(module, ec2)


if __name__ == '__main__':
    main()
