#!/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_template
short_description: Manages templates on Apache CloudStack based clouds.
description:
  - Register a template from URL, create a template from a ROOT volume of a stopped VM or its snapshot, extract and delete templates.
version_added: '2.0'
author: "René Moser (@resmo)"
options:
  name:
    description:
      - Name of the template.
    required: true
  url:
    description:
      - URL of where the template is hosted on C(state=present).
      - URL to which the template would be extracted on C(state=extracted).
      - Mutually exclusive with C(vm).
    required: false
    default: null
  vm:
    description:
      - VM name the template will be created from its volume or alternatively from a snapshot.
      - VM must be in stopped state if created from its volume.
      - Mutually exclusive with C(url).
    required: false
    default: null
  snapshot:
    description:
      - Name of the snapshot, created from the VM ROOT volume, the template will be created from.
      - C(vm) is required together with this argument.
    required: false
    default: null
  os_type:
    description:
      - OS type that best represents the OS of this template.
    required: false
    default: null
  checksum:
    description:
      - The MD5 checksum value of this template.
      - If set, we search by checksum instead of name.
    required: false
    default: false
  is_ready:
    description:
      - This flag is used for searching existing templates.
      - If set to C(true), it will only list template ready for deployment e.g. successfully downloaded and installed.
      - Recommended to set it to C(false).
    required: false
    default: false
  is_public:
    description:
      - Register the template to be publicly available to all users.
      - Only used if C(state) is present.
    required: false
    default: false
  is_featured:
    description:
      - Register the template to be featured.
      - Only used if C(state) is present.
    required: false
    default: false
  is_dynamically_scalable:
    description:
      - Register the template having XS/VMWare tools installed in order to support dynamic scaling of VM CPU/memory.
      - Only used if C(state) is present.
    required: false
    default: false
  cross_zones:
    description:
      - Whether the template should be syned or removed across zones.
      - Only used if C(state) is present or absent.
    required: false
    default: false
  mode:
    description:
      - Mode for the template extraction.
      - Only used if C(state=extracted).
    required: false
    default: 'http_download'
    choices: [ 'http_download', 'ftp_upload' ]
  domain:
    description:
      - Domain the template, snapshot or VM is related to.
    required: false
    default: null
  account:
    description:
      - Account the template, snapshot or VM is related to.
    required: false
    default: null
  project:
    description:
      - Name of the project the template to be registered in.
    required: false
    default: null
  zone:
    description:
      - Name of the zone you wish the template to be registered or deleted from.
      - If not specified, first found zone will be used.
    required: false
    default: null
  template_filter:
    description:
      - Name of the filter used to search for the template.
    required: false
    default: 'self'
    choices: [ 'featured', 'self', 'selfexecutable', 'sharedexecutable', 'executable', 'community' ]
  hypervisor:
    description:
      - Name the hypervisor to be used for creating the new template.
      - Relevant when using C(state=present).
    required: false
    default: none
    choices: [ 'KVM', 'VMware', 'BareMetal', 'XenServer', 'LXC', 'HyperV', 'UCS', 'OVM' ]
  requires_hvm:
    description:
      - true if this template requires HVM.
    required: false
    default: false
  password_enabled:
    description:
      - True if the template supports the password reset feature.
    required: false
    default: false
  template_tag:
    description:
      - the tag for this template.
    required: false
    default: null
  sshkey_enabled:
    description:
      - True if the template supports the sshkey upload feature.
    required: false
    default: false
  is_routing:
    description:
      - True if the template type is routing i.e., if template is used to deploy router.
      - Only considered if C(url) is used.
    required: false
    default: false
  format:
    description:
      - The format for the template.
      - Relevant when using C(state=present).
    required: false
    default: null
    choices: [ 'QCOW2', 'RAW', 'VHD', 'OVA' ]
  is_extractable:
    description:
      - True if the template or its derivatives are extractable.
    required: false
    default: false
  details:
    description:
      - Template details in key/value pairs.
    required: false
    default: null
  bits:
    description:
      - 32 or 64 bits support.
    required: false
    default: '64'
  display_text:
    description:
      - Display text of the template.
    required: false
    default: null
  state:
    description:
      - State of the template.
    required: false
    default: 'present'
    choices: [ 'present', 'absent', 'extacted' ]
  poll_async:
    description:
      - Poll async jobs until job has finished.
    required: false
    default: true
extends_documentation_fragment: cloudstack
'''

EXAMPLES = '''
# Register a systemvm template
- local_action:
    module: cs_template
    name: systemvm-vmware-4.5
    url: "http://packages.shapeblue.com/systemvmtemplate/4.5/systemvm64template-4.5-vmware.ova"
    hypervisor: VMware
    format: OVA
    cross_zones: yes
    os_type: Debian GNU/Linux 7(64-bit)

# Create a template from a stopped virtual machine's volume
- local_action:
    module: cs_template
    name: debian-base-template
    vm: debian-base-vm
    os_type: Debian GNU/Linux 7(64-bit)
    zone: tokio-ix
    password_enabled: yes
    is_public: yes

# Create a template from a virtual machine's root volume snapshot
- local_action:
    module: cs_template
    name: debian-base-template
    vm: debian-base-vm
    snapshot: ROOT-233_2015061509114
    os_type: Debian GNU/Linux 7(64-bit)
    zone: tokio-ix
    password_enabled: yes
    is_public: yes

# Remove a template
- local_action:
    module: cs_template
    name: systemvm-4.2
    cross_zones: yes
    state: absent
'''

RETURN = '''
---
id:
  description: UUID of the template.
  returned: success
  type: string
  sample: a6f7a5fc-43f8-11e5-a151-feff819cdc9f
name:
  description: Name of the template.
  returned: success
  type: string
  sample: Debian 7 64-bit
display_text:
  description: Display text of the template.
  returned: success
  type: string
  sample: Debian 7.7 64-bit minimal 2015-03-19
checksum:
  description: MD5 checksum of the template.
  returned: success
  type: string
  sample: 0b31bccccb048d20b551f70830bb7ad0
status:
  description: Status of the template.
  returned: success
  type: string
  sample: Download Complete
is_ready:
  description: True if the template is ready to be deployed from.
  returned: success
  type: boolean
  sample: true
is_public:
  description: True if the template is public.
  returned: success
  type: boolean
  sample: true
is_featured:
  description: True if the template is featured.
  returned: success
  type: boolean
  sample: true
is_extractable:
  description: True if the template is extractable.
  returned: success
  type: boolean
  sample: true
format:
  description: Format of the template.
  returned: success
  type: string
  sample: OVA
os_type:
  description: Typo of the OS.
  returned: success
  type: string
  sample: CentOS 6.5 (64-bit)
password_enabled:
  description: True if the reset password feature is enabled, false otherwise.
  returned: success
  type: boolean
  sample: false
sshkey_enabled:
  description: true if template is sshkey enabled, false otherwise.
  returned: success
  type: boolean
  sample: false
cross_zones:
  description: true if the template is managed across all zones, false otherwise.
  returned: success
  type: boolean
  sample: false
template_type:
  description: Type of the template.
  returned: success
  type: string
  sample: USER
created:
  description: Date of registering.
  returned: success
  type: string
  sample: 2015-03-29T14:57:06+0200
template_tag:
  description: Template tag related to this template.
  returned: success
  type: string
  sample: special
hypervisor:
  description: Hypervisor related to this template.
  returned: success
  type: string
  sample: VMware
mode:
  description: Mode of extraction
  returned: success
  type: string
  sample: http_download
state:
  description: State of the extracted template
  returned: success
  type: string
  sample: DOWNLOAD_URL_CREATED
url:
  description: Url to which the template is extracted to
  returned: success
  type: string
  sample: "http://1.2.3.4/userdata/eb307f13-4aca-45e8-b157-a414a14e6b04.ova"
tags:
  description: List of resource tags associated with the template.
  returned: success
  type: dict
  sample: '[ { "key": "foo", "value": "bar" } ]'
zone:
  description: Name of zone the template is registered in.
  returned: success
  type: string
  sample: zuerich
domain:
  description: Domain the template is related to.
  returned: success
  type: string
  sample: example domain
account:
  description: Account the template is related to.
  returned: success
  type: string
  sample: example account
project:
  description: Name of project the template is related to.
  returned: success
  type: string
  sample: Production
'''

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 AnsibleCloudStackTemplate(AnsibleCloudStack):

    def __init__(self, module):
        super(AnsibleCloudStackTemplate, self).__init__(module)
        self.returns = {
            'checksum':         'checksum',
            'status':           'status',
            'isready':          'is_ready',
            'templatetag':      'template_tag',
            'sshkeyenabled':    'sshkey_enabled',
            'passwordenabled':  'password_enabled',
            'tempaltetype':     'template_type',
            'ostypename':       'os_type',
            'crossZones':       'cross_zones',
            'isextractable':    'is_extractable',
            'isfeatured':       'is_featured',
            'ispublic':         'is_public',
            'format':           'format',
            'hypervisor':       'hypervisor',
            'url':              'url',
            'extractMode':      'mode',
            'state':            'state',
        }


    def _get_args(self):
        args                            = {}
        args['name']                    = self.module.params.get('name')
        args['displaytext']             = self.get_or_fallback('display_text', 'name')
        args['bits']                    = self.module.params.get('bits')
        args['isdynamicallyscalable']   = self.module.params.get('is_dynamically_scalable')
        args['isextractable']           = self.module.params.get('is_extractable')
        args['isfeatured']              = self.module.params.get('is_featured')
        args['ispublic']                = self.module.params.get('is_public')
        args['passwordenabled']         = self.module.params.get('password_enabled')
        args['requireshvm']             = self.module.params.get('requires_hvm')
        args['templatetag']             = self.module.params.get('template_tag')
        args['ostypeid']                = self.get_os_type(key='id')

        if not args['ostypeid']:
            self.module.fail_json(msg="Missing required arguments: os_type")

        return args


    def get_root_volume(self, key=None):
        args                        = {}
        args['account']             = self.get_account(key='name')
        args['domainid']            = self.get_domain(key='id')
        args['projectid']           = self.get_project(key='id')
        args['virtualmachineid']    = self.get_vm(key='id')
        args['type']                = "ROOT"

        volumes = self.cs.listVolumes(**args)
        if volumes:
            return self._get_by_key(key, volumes['volume'][0])
        self.module.fail_json(msg="Root volume for '%s' not found" % self.get_vm('name'))


    def get_snapshot(self, key=None):
        snapshot = self.module.params.get('snapshot')
        if not snapshot:
            return None

        args                = {}
        args['account']     = self.get_account(key='name')
        args['domainid']    = self.get_domain(key='id')
        args['projectid']   = self.get_project(key='id')
        args['volumeid']    = self.get_root_volume('id')
        snapshots = self.cs.listSnapshots(**args)
        if snapshots:
            for s in snapshots['snapshot']:
                if snapshot in [ s['name'], s['id'] ]:
                    return self._get_by_key(key, s)
        self.module.fail_json(msg="Snapshot '%s' not found" % snapshot)


    def create_template(self):
        template = self.get_template()
        if not template:
            self.result['changed'] = True

            args = self._get_args()
            snapshot_id = self.get_snapshot(key='id')
            if snapshot_id:
                args['snapshotid'] = snapshot_id
            else:
                args['volumeid']  = self.get_root_volume('id')

            if not self.module.check_mode:
                template = self.cs.createTemplate(**args)

                if 'errortext' in template:
                    self.module.fail_json(msg="Failed: '%s'" % template['errortext'])

                poll_async = self.module.params.get('poll_async')
                if poll_async:
                    template = self._poll_job(template, 'template')
        return template


    def register_template(self):
        required_params = [
            'format',
            'url',
            'hypervisor',
        ]
        self.module.fail_on_missing_params(required_params=required_params)
        template = self.get_template()
        if not template:
            self.result['changed'] = True
            args                    = self._get_args()
            args['url']             = self.module.params.get('url')
            args['format']          = self.module.params.get('format')
            args['checksum']        = self.module.params.get('checksum')
            args['isextractable']   = self.module.params.get('is_extractable')
            args['isrouting']       = self.module.params.get('is_routing')
            args['sshkeyenabled']   = self.module.params.get('sshkey_enabled')
            args['hypervisor']      = self.get_hypervisor()
            args['domainid']        = self.get_domain(key='id')
            args['account']         = self.get_account(key='name')
            args['projectid']       = self.get_project(key='id')

            if not self.module.params.get('cross_zones'):
                args['zoneid'] = self.get_zone(key='id')
            else:
                args['zoneid'] = -1

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


    def get_template(self):
        args                    = {}
        args['isready']         = self.module.params.get('is_ready')
        args['templatefilter']  = self.module.params.get('template_filter')
        args['domainid']        = self.get_domain(key='id')
        args['account']         = self.get_account(key='name')
        args['projectid']       = self.get_project(key='id')

        if not self.module.params.get('cross_zones'):
            args['zoneid'] = self.get_zone(key='id')

        # if checksum is set, we only look on that.
        checksum = self.module.params.get('checksum')
        if not checksum:
            args['name'] = self.module.params.get('name')

        templates = self.cs.listTemplates(**args)
        if templates:
            # if checksum is set, we only look on that.
            if not checksum:
                return templates['template'][0]
            else:
                for i in templates['template']:
                    if 'checksum' in i and i['checksum'] == checksum:
                        return i
        return None


    def extract_template(self):
        template = self.get_template()
        if not template:
            self.module.fail_json(msg="Failed: template not found")

        args           = {}
        args['id']     = template['id']
        args['url']    = self.module.params.get('url')
        args['mode']   = self.module.params.get('mode')
        args['zoneid'] = self.get_zone(key='id')

        self.result['changed'] = True

        if not self.module.check_mode:
            template = self.cs.extractTemplate(**args)

            if 'errortext' in template:
                self.module.fail_json(msg="Failed: '%s'" % template['errortext'])

            poll_async = self.module.params.get('poll_async')
            if poll_async:
                template = self._poll_job(template, 'template')
        return template


    def remove_template(self):
        template = self.get_template()
        if template:
            self.result['changed'] = True

            args            = {}
            args['id']      = template['id']

            if not self.module.params.get('cross_zones'):
                args['zoneid']  = self.get_zone(key='id')

            if not self.module.check_mode:
                res = self.cs.deleteTemplate(**args)

                if 'errortext' in res:
                    self.module.fail_json(msg="Failed: '%s'" % res['errortext'])

                poll_async = self.module.params.get('poll_async')
                if poll_async:
                    res = self._poll_job(res, 'template')
        return template



def main():
    argument_spec = cs_argument_spec()
    argument_spec.update(dict(
        name = dict(required=True),
        display_text = dict(default=None),
        url = dict(default=None),
        vm = dict(default=None),
        snapshot = dict(default=None),
        os_type = dict(default=None),
        is_ready = dict(type='bool', default=False),
        is_public = dict(type='bool', default=True),
        is_featured = dict(type='bool', default=False),
        is_dynamically_scalable = dict(type='bool', default=False),
        is_extractable = dict(type='bool', default=False),
        is_routing = dict(type='bool', default=False),
        checksum = dict(default=None),
        template_filter = dict(default='self', choices=['featured', 'self', 'selfexecutable', 'sharedexecutable', 'executable', 'community']),
        hypervisor = dict(choices=CS_HYPERVISORS, default=None),
        requires_hvm = dict(type='bool', default=False),
        password_enabled = dict(type='bool', default=False),
        template_tag = dict(default=None),
        sshkey_enabled = dict(type='bool', default=False),
        format = dict(choices=['QCOW2', 'RAW', 'VHD', 'OVA'], default=None),
        details = dict(default=None),
        bits = dict(type='int', choices=[ 32, 64 ], default=64),
        state = dict(choices=['present', 'absent', 'extracted'], default='present'),
        cross_zones = dict(type='bool', default=False),
        mode = dict(choices=['http_download', 'ftp_upload'], default='http_download'),
        zone = dict(default=None),
        domain = dict(default=None),
        account = dict(default=None),
        project = dict(default=None),
        poll_async = dict(type='bool', default=True),
    ))

    module = AnsibleModule(
        argument_spec=argument_spec,
        required_together=cs_required_together(),
        mutually_exclusive = (
            ['url', 'vm'],
            ['zone', 'cross_zones'],
        ),
        supports_check_mode=True
    )

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

    try:
        acs_tpl = AnsibleCloudStackTemplate(module)

        state = module.params.get('state')
        if state in ['absent']:
            tpl = acs_tpl.remove_template()

        elif state in ['extracted']:
            tpl = acs_tpl.extract_template()

        else:
            if module.params.get('url'):
                tpl = acs_tpl.register_template()
            elif module.params.get('vm'):
                tpl = acs_tpl.create_template()
            else:
                module.fail_json(msg="one of the following is required on state=present: url,vm")

        result = acs_tpl.get_result(tpl)

    except CloudStackException as 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()
