#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# (c) 2015, René Moser <mail@renemoser.net>
#
# 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/>.

DOCUMENTATION = '''
---
module: cs_instancegroup
short_description: Manages instance groups on Apache CloudStack based clouds.
description:
    - Create and remove instance groups.
version_added: '2.0'
author: "René Moser (@resmo)"
options:
  name:
    description:
      - Name of the instance group.
    required: true
  domain:
    description:
      - Domain the instance group is related to.
    required: false
    default: null
  account:
    description:
      - Account the instance group is related to.
    required: false
    default: null
  project:
    description:
      - Project the instance group is related to.
    required: false
    default: null
  state:
    description:
      - State of the instance group.
    required: false
    default: 'present'
    choices: [ 'present', 'absent' ]
extends_documentation_fragment: cloudstack
'''

EXAMPLES = '''
# Create an instance group
- local_action:
    module: cs_instancegroup
    name: loadbalancers

# Remove an instance group
- local_action:
    module: cs_instancegroup
    name: loadbalancers
    state: absent
'''

RETURN = '''
---
id:
  description: UUID of the instance group.
  returned: success
  type: string
  sample: 04589590-ac63-4ffc-93f5-b698b8ac38b6
name:
  description: Name of the instance group.
  returned: success
  type: string
  sample: webservers
created:
  description: Date when the instance group was created.
  returned: success
  type: string
  sample: 2015-05-03T15:05:51+0200
domain:
  description: Domain the instance group is related to.
  returned: success
  type: string
  sample: example domain
account:
  description: Account the instance group is related to.
  returned: success
  type: string
  sample: example account
project:
  description: Project the instance group is related to.
  returned: success
  type: string
  sample: example project
'''

try:
    from cs import CloudStack, CloudStackException, read_config
    has_lib_cs = True
except ImportError:
    has_lib_cs = False

# import cloudstack common
from ansible.module_utils.cloudstack import *


class AnsibleCloudStackInstanceGroup(AnsibleCloudStack):

    def __init__(self, module):
        super(AnsibleCloudStackInstanceGroup, self).__init__(module)
        self.instance_group = None


    def get_instance_group(self):
        if self.instance_group:
            return self.instance_group

        name = self.module.params.get('name')

        args                = {}
        args['account']     = self.get_account('name')
        args['domainid']    = self.get_domain('id')
        args['projectid']   = self.get_project('id')

        instance_groups = self.cs.listInstanceGroups(**args)
        if instance_groups:
            for g in instance_groups['instancegroup']:
                if name in [ g['name'], g['id'] ]:
                    self.instance_group = g
                    break
        return self.instance_group


    def present_instance_group(self):
        instance_group = self.get_instance_group()
        if not instance_group:
            self.result['changed'] = True

            args                = {}
            args['name']        = self.module.params.get('name')
            args['account']     = self.get_account('name')
            args['domainid']    = self.get_domain('id')
            args['projectid']   = self.get_project('id')

            if not self.module.check_mode:
                res = self.cs.createInstanceGroup(**args)
                if 'errortext' in res:
                    self.module.fail_json(msg="Failed: '%s'" % res['errortext'])
                instance_group = res['instancegroup']
        return instance_group


    def absent_instance_group(self):
        instance_group = self.get_instance_group()
        if instance_group:
            self.result['changed'] = True
            if not self.module.check_mode:
                res = self.cs.deleteInstanceGroup(id=instance_group['id'])
                if 'errortext' in res:
                    self.module.fail_json(msg="Failed: '%s'" % res['errortext'])
        return instance_group


def main():
    argument_spec = cs_argument_spec()
    argument_spec.update(dict(
        name = dict(required=True),
        state = dict(default='present', choices=['present', 'absent']),
        domain = dict(default=None),
        account = dict(default=None),
        project = dict(default=None),
    ))

    module = AnsibleModule(
        argument_spec=argument_spec,
        required_together=cs_required_together(),
        supports_check_mode=True
    )

    if not has_lib_cs:
        module.fail_json(msg="python library cs required: pip install cs")

    try:
        acs_ig = AnsibleCloudStackInstanceGroup(module)

        state = module.params.get('state')
        if state in ['absent']:
            instance_group = acs_ig.absent_instance_group()
        else:
            instance_group = acs_ig.present_instance_group()

        result = acs_ig.get_result(instance_group)

    except CloudStackException, e:
        module.fail_json(msg='CloudStackException: %s' % str(e))

    module.exit_json(**result)

# import module snippets
from ansible.module_utils.basic import *
if __name__ == '__main__':
    main()