#!/usr/bin/python
#coding: utf-8 -*-

# (c) 2013, Benno Joy <benno@ansibleworks.com>
#
# This module 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.
#
# This software 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 this software.  If not, see <http://www.gnu.org/licenses/>.

try:
    from novaclient.v1_1 import client as nova_client
    import time
except ImportError:
    print("failed=True msg='novaclient is required for this module'")

DOCUMENTATION = '''
---
module: nova_compute
short_description: Create/Delete VMs from OpenStack
description:
   - Create or Remove virtual machines from Openstack.
options:
   login_username:
     description:
        - login username to authenticate to keystone
     required: true
     default: admin
   login_password:
     description:
        - Password of login user
     required: true
     default: 'yes'
   login_tenant_name:
     description:
        - The tenant name of the login user
     required: true
     default: 'yes'
   auth_url:
     description:
        - The keystone url for authentication
     required: false
     default: 'http://127.0.0.1:35357/v2.0/'
   region_name:
     description:
        - Name of the region
     required: false
     default: None
   state:
     description:
        - Indicate desired state of the resource
     choices: ['present', 'absent']
     default: present
   name:
     description:
        - Name that has to be given to the image
     required: true
     default: None
   image_id:
     description:
        - The id of the image that has to be cloned
     required: true
     default: None
   flavor_id:
     description:
        - The id of the flavor in which the new VM has to be created
     required: false
     default: 1
   key_name:
     description:
        - The key pair name to be used when creating a VM
     required: false
     default: None
   security_groups:
     description:
        - The name of the security group to which the VM should be added
     required: false
     default: None
   nics:
     description:
        - A list of network id's to which the VM's interface should be attached 
     required: false
     default: None
   meta:
     description:
        - A list of key value pairs that should be provided as a metadata to the new VM
     required: false
     default: None
   wait:
     description:
        - If the module should wait for the VM to be created.
     required: false
     default: 'yes'
   wait_for:
     description:
        - The amount of time the module should wait for the VM to get into active state
     required: false
     default: 180
requirements: ["novaclient"]
'''

EXAMPLES = '''
# Creates a new VM and attaches to a network and passes metadata to the instance
- nova_compute:
       state: present
       login_username: admin
       login_password: admin
       login_tenant_name: admin
       name: vm1
       image_id: 4f905f38-e52a-43d2-b6ec-754a13ffb529
       key_name: ansible_key
       wait_for: 200
       flavor_id: 4
       nics:
         - net-id: 34605f38-e52a-25d2-b6ec-754a13ffb723
       meta:
         hostname: test1
         group: uge_master
'''

def _delete_server(module, nova):
    name = None
    try:
        server = nova.servers.list(True, {'name': module.params['name']}).pop()
        nova.servers.delete(server)
    except Exception as e:
        module.fail_json( msg = "Error in deleting vm: %s" % e.message)
    if module.params['wait'] == 'no':
        module.exit_json(changed = True, result = "deleted")
    expire = time.time() + module.params['wait_for']
    while time.time() < expire:
        name = nova.servers.list(True, {'name': module.params['name']})
        if not name:
            module.exit_json(changed = True, result = "deleted")
        time.sleep(5)
    module.fail_json(msg = "Timed out waiting for server to get deleted, please check manually")


def _create_server(module, nova):
    bootargs = [module.params['name'], module.params['image_id'], module.params['flavor_id']]
    bootkwargs = {
                'nics' : module.params['nics'],
                'meta' : module.params['meta'],
                'key_name': module.params['key_name'],
                'security_groups': module.params['security_groups'].split(','),
    }
    if not module.params['key_name']:
        del bootkwargs['key_name']
    try:
        server = nova.servers.create(*bootargs, **bootkwargs)
        server = nova.servers.get(server.id)
    except Exception as e:
            module.fail_json( msg = "Error in creating instance: %s " % e.message)
    if module.params['wait'] == 'yes':
        expire = time.time() + module.params['wait_for']
        while time.time() < expire:
            try:
                server = nova.servers.get(server.id)
            except Exception as e:
                    module.fail_json( msg = "Error in getting info from instance: %s " % e.message)
            if server.status == 'ACTIVE':
                private = [ x['addr'] for x in getattr(server, 'addresses').itervalues().next() if x['OS-EXT-IPS:type'] == 'fixed']
                public  = [ x['addr'] for x in getattr(server, 'addresses').itervalues().next() if x['OS-EXT-IPS:type'] == 'floating']
                module.exit_json(changed = True, id = server.id, private_ip=''.join(private), public_ip=''.join(public), status = server.status, info = server._info)
            if server.status == 'ERROR':
                module.fail_json(msg = "Error in creating the server, please check logs")
            time.sleep(2)
                
        module.fail_json(msg = "Timeout waiting for the server to come up.. Please check manually")
    if server.status == 'ERROR':
            module.fail_json(msg = "Error in creating the server.. Please check manually")
    private = [ x['addr'] for x in getattr(server, 'addresses').itervalues().next() if x['OS-EXT-IPS:type'] == 'fixed']
    public  = [ x['addr'] for x in getattr(server, 'addresses').itervalues().next() if x['OS-EXT-IPS:type'] == 'floating']
    module.exit_json(changed = True, id = info['id'], private_ip=''.join(private), public_ip=''.join(public), status = server.status, info = server._info)

         
def _get_server_state(module, nova):
    server = None
    try:
        servers = nova.servers.list(True, {'name': module.params['name']})
        if servers:
            server = servers.pop()
    except Exception as e:
        module.fail_json(msg = "Error in getting the server list: %s" % e.message)
    if server and module.params['state'] == 'present':
        if server.status != 'ACTIVE':
            module.fail_json( msg="The VM is available but not Active. state:" + server.status)
        private = [ x['addr'] for x in getattr(server, 'addresses').itervalues().next() if x['OS-EXT-IPS:type'] == 'fixed']
        public  = [ x['addr'] for x in getattr(server, 'addresses').itervalues().next() if x['OS-EXT-IPS:type'] == 'floating']
        module.exit_json(changed = False, id = server.id, public_ip = ''.join(public), private_ip = ''.join(private), info = server._info)      
    if server and module.params['state'] == 'absent':
        return True
    if module.params['state'] == 'absent':
        module.exit_json(changed = False, result = "not present")
    return True
                

        
def main():
    module = AnsibleModule(
        argument_spec                   = dict(
        login_username                  = dict(default='admin'),
        login_password                  = dict(required=True),
        login_tenant_name               = dict(required='True'),
        auth_url                        = dict(default='http://127.0.0.1:35357/v2.0/'),
        region_name                     = dict(default=None),
        name                            = dict(required=True),
        image_id                        = dict(required=True), 
        flavor_id                       = dict(default=1),
        key_name                        = dict(default=None),
        security_groups                 = dict(default='default'),
        nics                            = dict(default=None),
        meta                            = dict(default=None),
        wait                            = dict(default='yes', choices=['yes', 'no']),
        wait_for                        = dict(default=120),
        state                           = dict(default='present', choices=['absent', 'present'])
        ),
    )
        
    try:
        nova = nova_client.Client( module.params['login_username'], 
                                           module.params['login_password'], 
                                           module.params['login_tenant_name'], 
                                           module.params['auth_url'], 
                                           service_type='compute')
    except Exception as e:
        module.fail_json( msg = "Error in authenticating to nova: %s" % e.message)
    if module.params['state'] == 'present':
        _get_server_state(module, nova)
        _create_server(module, nova)
    if module.params['state'] == 'absent':
        _get_server_state(module, nova)
        _delete_server(module, nova)
                
# this is magic, see lib/ansible/module.params['common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()

