#!/usr/bin/python
#
# Create a Webfaction application using Ansible and the Webfaction API
#
# Valid application types can be found by looking here:
# http://docs.webfaction.com/xmlrpc-api/apps.html#application-types
#
# ------------------------------------------
#
# (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_app
short_description: Add or remove applications on a Webfaction host
description:
    - Add or remove applications 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 application
        required: true

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

    type:
        description:
            - The type of application to create. See the Webfaction docs at http://docs.webfaction.com/xmlrpc-api/apps.html for a list.
        required: true

    autostart:
        description:
            - Whether the app should restart with an autostart.cgi script
        required: false
        default: "no"

    extra_info:
        description:
            - Any extra parameters required by the app
        required: false
        default: null

    port_open:
        description:
            - IF the port should be opened
        required: false
        default: false

    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 = '''
  - name: Create a test app
    webfaction_app:
      name="my_wsgi_app1"
      state=present
      type=mod_wsgi35-python27 
      login_name={{webfaction_user}}
      login_password={{webfaction_passwd}}
      machine={{webfaction_machine}}
'''

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'),
            type = dict(required=True),
            autostart = dict(required=False, type='bool', default=False),
            extra_info = dict(required=False, default=""),
            port_open = dict(required=False, type='bool', default=False),
            login_name = dict(required=True),
            login_password = dict(required=True),
            machine = dict(required=False, default=False),
        ),
        supports_check_mode=True
    )
    app_name  = module.params['name']
    app_type = module.params['type']
    app_state = module.params['state']

    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']
        )

    app_list = webfaction.list_apps(session_id)
    app_map = dict([(i['name'], i) for i in app_list])
    existing_app = app_map.get(app_name)

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

    if app_state == 'present':

        # Does an app with this name already exist?
        if existing_app:
            if existing_app['type'] != app_type:
                module.fail_json(msg="App already exists with different type. Please fix by hand.")

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

        if not module.check_mode:
            # If this isn't a dry run, create the app
            result.update(
                webfaction.create_app(
                    session_id, app_name, app_type, 
                    module.boolean(module.params['autostart']), 
                    module.params['extra_info'],
                    module.boolean(module.params['port_open'])
                )
            )

    elif app_state == 'absent':

        # If the app's already not there, nothing changed.
        if not existing_app:
            module.exit_json(
                changed = False,
            )

        if not module.check_mode:
            # If this isn't a dry run, delete the app
            result.update(
                webfaction.delete_app(session_id, app_name)
            )

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


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

from ansible.module_utils.basic import *

if __name__ == '__main__':
    main()
