#!/usr/bin/python
#
# Create a webfaction database using Ansible and the Webfaction API
#
# ------------------------------------------
#
# (c) Quentin Stafford-Fraser 2015, with contributions gratefully acknowledged from:
#     * Andy Baker
#     * Federico Tarantini
#
# 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 = {'status': ['preview'],
                    'supported_by': 'community',
                    'version': '1.0'}

DOCUMENTATION = '''
---
module: webfaction_db
short_description: Add or remove a database on Webfaction
description:
    - Add or remove a database on a Webfaction host. Further documentation at http://github.com/quentinsf/ansible-webfaction.
author: Quentin Stafford-Fraser (@quentinsf)
version_added: "2.0"
notes:
    - "You can run playbooks that use this on a local machine, or on a Webfaction host, or elsewhere, since the scripts use the remote webfaction API - the location is not important. However, running them on multiple hosts I(simultaneously) is best avoided. If you don't specify I(localhost) as your host, you may want to add C(serial: 1) to the plays."
    - See `the webfaction API <http://docs.webfaction.com/xmlrpc-api/>`_ for more info.
options:

    name:
        description:
            - The name of the database
        required: true

    state:
        description:
            - Whether the database should exist
        required: false
        choices: ['present', 'absent']
        default: "present"

    type:
        description:
            - The type of database to create.
        required: true
        choices: ['mysql', 'postgresql']

    password:
        description:
            - The password for the new database user.
        required: false
        default: None

    login_name:
        description:
            - The webfaction account to use
        required: true

    login_password:
        description:
            - The webfaction password to use
        required: true

    machine:
        description:
            - The machine name to use (optional for accounts with only one machine)
        required: false
'''

EXAMPLES = '''
  # This will also create a default DB user with the same
  # name as the database, and the specified password.
  
  - name: Create a database
    webfaction_db:
      name: "{{webfaction_user}}_db1"
      password: mytestsql
      type: mysql
      login_name: "{{webfaction_user}}"
      login_password: "{{webfaction_passwd}}"
      machine: "{{webfaction_machine}}"

  # Note that, for symmetry's sake, deleting a database using
  # 'state: absent' will also delete the matching user.

'''

import socket
import xmlrpclib

webfaction = xmlrpclib.ServerProxy('https://api.webfaction.com/')

def main():

    module = AnsibleModule(
        argument_spec = dict(
            name = dict(required=True),
            state = dict(required=False, choices=['present', 'absent'], default='present'),
            # You can specify an IP address or hostname.
            type = dict(required=True),
            password = dict(required=False, default=None),
            login_name = dict(required=True),
            login_password = dict(required=True),
            machine = dict(required=False, default=False),
        ),
        supports_check_mode=True
    )
    db_name  = module.params['name']
    db_state = module.params['state']
    db_type  = module.params['type']
    db_passwd = module.params['password']

    if module.params['machine']:
        session_id, account = webfaction.login(
            module.params['login_name'],
            module.params['login_password'],
            module.params['machine']
        )
    else:
        session_id, account = webfaction.login(
            module.params['login_name'],
            module.params['login_password']
        )

    db_list = webfaction.list_dbs(session_id)
    db_map = dict([(i['name'], i) for i in db_list])
    existing_db = db_map.get(db_name)

    user_list = webfaction.list_db_users(session_id)
    user_map = dict([(i['username'], i) for i in user_list])
    existing_user = user_map.get(db_name)

    result = {}
    
    # Here's where the real stuff happens

    if db_state == 'present':

        # Does a database with this name already exist?
        if existing_db:
            # Yes, but of a different type - fail
            if existing_db['db_type'] != db_type:
                module.fail_json(msg="Database already exists but is a different type. Please fix by hand.")

            # If it exists with the right type, we don't change anything.
            module.exit_json(
                changed = False,
            )


        if not module.check_mode:
            # If this isn't a dry run, create the db
            # and default user.
            result.update(
                webfaction.create_db(
                    session_id, db_name, db_type, db_passwd
                )
            )

    elif db_state == 'absent':

        # If this isn't a dry run...
        if not module.check_mode:
  
            if not (existing_db or existing_user):
                module.exit_json(changed = False,)
                
            if existing_db:
                # Delete the db if it exists
                result.update(
                    webfaction.delete_db(session_id, db_name, db_type)
                )
                    
            if existing_user:
                # Delete the default db user if it exists
                result.update(
                    webfaction.delete_db_user(session_id, db_name, db_type)
                )

    else:
        module.fail_json(msg="Unknown state specified: {}".format(db_state))

    module.exit_json(
        changed = True,
        result = result
    )

from ansible.module_utils.basic import *

if __name__ == '__main__':
    main()
