#!/usr/bin/python -tt
# 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: rax_cdb_database
short_description: create / delete a database in the Cloud Databases
description:
  - create / delete a database in the Cloud Databases.
version_added: "1.88888888ns:
  api_key:
    description:
      - Rackspace API key (overrides I(credentials))
    aliases:
      - password
  credentials:
    description:
      - File to find the Rackspace credentials in (ignored if I(api_key) and
        I(username) are provided)
    default: null
    aliases:
      - creds_file
  region:
    description:
      - Region to create an instance in
    default: DFW
  username:
    description:
      - Rackspace username (overrides I(credentials))
  cdb_id:
    description:
      - The databases server UUID
    default: null
  name:
    description:
      - Name to give to the database
    default: null
  character_set:
    description:
      - Set of symbols and encodings
    default: 'utf8'
  collate:
    description:
      - Set of rules for comparing characters in a character set
    default: 'utf8_general_ci'
  state:
    description:
      - Indicate desired state of the resource
    choices: ['present', 'absent']
    default: present
requirements: [ "pyrax" ]
author: Simon JAILLET
notes:
  - The following environment variables can be used, C(RAX_USERNAME),
    C(RAX_API_KEY), C(RAX_CREDS_FILE), C(RAX_CREDENTIALS), C(RAX_REGION).
  - C(RAX_CREDENTIALS) and C(RAX_CREDS_FILE) points to a credentials file
    appropriate for pyrax. See U(https://github.com/rackspace/pyrax/blob/master/docs/getting_started.md#authenticating)
  - C(RAX_USERNAME) and C(RAX_API_KEY) obviate the use of a credentials file
  - C(RAX_REGION) defines a Rackspace Public Cloud region (DFW, ORD, LON, ...)
'''

EXAMPLES = '''
- name: Build a database in Cloud Databases
  tasks:
    - name: Database build request
      local_action:
        module: rax_cdb_database
        credentials: ~/.raxpub
        region: IAD
        cdb_id: 323e7ce0-9cb0-11e3-a5e2-0800200c9a66
        name: db1
        state: present
      register: rax_db_database
'''

import sys
from types import NoneType

try:
    import pyrax
except ImportError:
    print("failed=True msg='pyrax is required for this module'")
    sys.exit(1)

NON_CALLABLES = (basestring, bool, dict, int, list, NoneType)


def to_dict(obj):
    instance = {}
    for key in dir(obj):
        value = getattr(obj, key)
        if (isinstance(value, NON_CALLABLES) and not key.startswith('_')):
            instance[key] = value
    return instance


def find_database(instance, name):
    try:
        database = instance.get_database(name)
    except Exception:
        return False

    return database


def save_database(module, cdb_id, name, character_set, collate):

    for arg, value in dict(cdb_id=cdb_id, name=name).iteritems():
        if not value:
            module.fail_json(msg='%s is required for the "rax_cdb_database" '
                                 'module' % arg)

    cdb = pyrax.cloud_databases

    try:
        instance = cdb.get(cdb_id)
    except Exception, e:
        module.fail_json(msg='%s' % e.message)

    changed = False

    database = find_database(instance, name)

    if not database:
        try:
            database = instance.create_database(name=name,
                                                character_set=character_set,
                                                collate=collate)
        except Exception, e:
            module.fail_json(msg='%s' % e.message)
        else:
            changed = True

    module.exit_json(
      changed=changed,
      action='create',
      database=to_dict(database)
    )


def delete_database(module, cdb_id, name):

    for arg, value in dict(cdb_id=cdb_id, name=name).iteritems():
        if not value:
            module.fail_json(msg='%s is required for the "rax_cdb_database" '
                                 'module' % arg)

    cdb = pyrax.cloud_databases

    try:
        instance = cdb.get(cdb_id)
    except Exception, e:
        module.fail_json(msg='%s' % e.message)

    changed = False

    database = find_database(instance, name)

    if database:
        try:
            database.delete()
        except Exception, e:
            module.fail_json(msg='%s' % e.message)
        else:
            changed = True

    module.exit_json(changed=changed, action='delete')


def rax_cdb_database(module, state, cdb_id, name, character_set, collate):

    # act on the state
    if state == 'present':
        save_database(module, cdb_id, name, character_set, collate)
    elif state == 'absent':
        delete_database(module, cdb_id, name)


def main():
    argument_spec = rax_argument_spec()
    argument_spec.update(
        dict(
            cdb_id=dict(type='str', required=True),
            name=dict(type='str', required=True),
            character_set=dict(type='str', default='utf8'),
            collate=dict(type='str', default='utf8_general_ci'),
            state=dict(default='present', choices=['present', 'absent'])
        )
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
        required_together=rax_required_together(),
    )

    cdb_id = module.params.get('cdb_id')
    name = module.params.get('name')
    character_set = module.params.get('character_set')
    collate = module.params.get('collate')
    state = module.params.get('state')

    setup_rax_module(module, pyrax)
    rax_cdb_database(module, state, cdb_id, name, character_set, collate)


# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.rax import *

### invoke the module
main()