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

# Copyright: (c) 2019, Dag Wieers (@dagwieers) <dag@wieers.com>
# GNU General Public License v3.0+ (see LICENSE or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type

ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'community'}

DOCUMENTATION = r'''
---
module: mso_schema_site_anp_epg
short_description: Manage site-local Endpoint Groups (EPGs) in schema template
description:
- Manage site-local EPGs in schema template on Cisco ACI Multi-Site.
author:
- Dag Wieers (@dagwieers)
options:
  schema:
    description:
    - The name of the schema.
    type: str
    required: yes
  site:
    description:
    - The name of the site.
    type: str
    required: yes
  template:
    description:
    - The name of the template.
    type: str
    required: yes
  anp:
    description:
    - The name of the ANP.
    type: str
    required: yes
  epg:
    description:
    - The name of the EPG to manage.
    type: str
    aliases: [ name ]
  private_link_label:
    description:
    - The private link label used to represent this subnet.
    - This parameter is available for MSO version greater than 3.3.
    type: str
  state:
    description:
    - Use C(present) or C(absent) for adding or removing.
    - Use C(query) for listing an object or multiple objects.
    type: str
    choices: [ absent, present, query ]
    default: present
seealso:
- module: cisco.mso.mso_schema_site_anp
- module: cisco.mso.mso_schema_site_anp_epg_subnet
- module: cisco.mso.mso_schema_template_anp_epg
extends_documentation_fragment: cisco.mso.modules
'''

EXAMPLES = r'''
- name: Add a new site EPG
  cisco.mso.mso_schema_site_anp_epg:
    host: mso_host
    username: admin
    password: SomeSecretPassword
    schema: Schema1
    site: Site1
    template: Template1
    anp: ANP1
    epg: EPG1
    state: present
  delegate_to: localhost

- name: Remove a site EPG
  cisco.mso.mso_schema_site_anp_epg:
    host: mso_host
    username: admin
    password: SomeSecretPassword
    schema: Schema1
    site: Site1
    template: Template1
    anp: ANP1
    epg: EPG1
    state: absent
  delegate_to: localhost

- name: Query a specific site EPGs
  cisco.mso.mso_schema_site_anp_epg:
    host: mso_host
    username: admin
    password: SomeSecretPassword
    schema: Schema1
    site: Site1
    template: Template1
    anp: ANP1
    epg: EPG1
    state: query
  delegate_to: localhost
  register: query_result

- name: Query all site EPGs
  cisco.mso.mso_schema_site_anp_epg:
    host: mso_host
    username: admin
    password: SomeSecretPassword
    schema: Schema1
    site: Site1
    template: Template1
    anp: ANP1
    state: query
  delegate_to: localhost
  register: query_result
'''

RETURN = r'''
'''

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.cisco.mso.plugins.module_utils.mso import MSOModule, mso_argument_spec


def main():
    argument_spec = mso_argument_spec()
    argument_spec.update(
        schema=dict(type='str', required=True),
        site=dict(type='str', required=True),
        template=dict(type='str', required=True),
        anp=dict(type='str', required=True),
        epg=dict(type='str', aliases=['name']),  # This parameter is not required for querying all objects
        private_link_label=dict(type='str'),
        state=dict(type='str', default='present', choices=['absent', 'present', 'query']),
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
        supports_check_mode=True,
        required_if=[
            ['state', 'absent', ['epg']],
            ['state', 'present', ['epg']],
        ],
    )

    schema = module.params.get('schema')
    site = module.params.get('site')
    template = module.params.get('template').replace(' ', '')
    anp = module.params.get('anp')
    epg = module.params.get('epg')
    private_link_label = module.params.get('private_link_label')
    state = module.params.get('state')

    mso = MSOModule(module)

    # Get schema objects
    schema_id, schema_path, schema_obj = mso.query_schema(schema)

    # Get template
    templates = [t.get('name') for t in schema_obj.get('templates')]
    if template not in templates:
        mso.fail_json(msg="Provided template '{0}' does not exist. Existing templates: {1}".format(template, ', '.join(templates)))
    template_idx = templates.index(template)

    # Get site
    site_id = mso.lookup_site(site)

    # Get site_idx
    if 'sites' not in schema_obj:
        mso.fail_json(msg="No site associated with template '{0}'. Associate the site with the template using mso_schema_site.".format(template))
    sites = [(s.get('siteId'), s.get('templateName')) for s in schema_obj.get('sites')]
    sites_list = [s.get('siteId') + '/' + s.get('templateName') for s in schema_obj.get('sites')]
    if (site_id, template) not in sites:
        mso.fail_json(msg="Provided site/siteId/template '{0}/{1}/{2}' does not exist. "
                          "Existing siteIds/templates: {3}".format(site, site_id, template, ', '.join(sites_list)))

    # Schema-access uses indexes
    site_idx = sites.index((site_id, template))
    # Path-based access uses site_id-template
    site_template = '{0}-{1}'.format(site_id, template)

    payload = {}
    ops = []
    op_path = ''

    # Get ANP
    anp_ref = mso.anp_ref(schema_id=schema_id, template=template, anp=anp)
    anps = [a.get('anpRef') for a in schema_obj['sites'][site_idx]['anps']]
    anps_in_temp = [a.get('name') for a in schema_obj['templates'][template_idx]['anps']]
    if anp not in anps_in_temp:
        mso.fail_json(msg="Provided anp '{0}' does not exist. Existing anps: {1}".format(anp, ', '.join(anps_in_temp)))
    else:
        # Get anp index at template level
        template_anp_idx = anps_in_temp.index(anp)

    # If anp not at site level but exists at template level
    if anp_ref not in anps:
        op_path = '/sites/{0}/anps'.format(site_template)
        payload = dict(
            anpRef=dict(
                schemaId=schema_id,
                templateName=template,
                anpName=anp,
            ),
        )
    else:
        # Get anp index at site level
        anp_idx = anps.index(anp_ref)

    if epg is not None:
        # Get EPG
        epg_ref = mso.epg_ref(schema_id=schema_id, template=template, anp=anp, epg=epg)
        new_epg = dict(
            epgRef=dict(
                schemaId=schema_id,
                templateName=template,
                anpName=anp,
                epgName=epg,
            )
        )

        # If anp exists at site level
        if 'anpRef' not in payload:
            epgs = [e.get('epgRef') for e in schema_obj['sites'][site_idx]['anps'][anp_idx]['epgs']]

        # If anp already at site level AND if epg not at site level (or) anp not at site level?
        if ('anpRef' not in payload and epg_ref not in epgs) or 'anpRef' in payload:
            epgs_in_temp = [e.get('name') for e in schema_obj['templates'][template_idx]['anps'][template_anp_idx]['epgs']]

            # If EPG not at template level - Fail
            if epg not in epgs_in_temp:
                mso.fail_json(msg="Provided EPG '{0}' does not exist. Existing EPGs: {1}".format(epg, ', '.join(epgs_in_temp)))

            # EPG at template level but not at site level. Create payload at site level for EPG
            else:
                # If anp not in payload then, anp already exists at site level. New payload will only have new EPG payload
                if 'anpRef' not in payload:
                    op_path = '/sites/{0}/anps/{1}/epgs'.format(site_template, anp)
                    payload = new_epg
                else:
                    # If anp in payload, anp exists at site level. Update payload with EPG payload
                    payload['epgs'] = [new_epg]

        # Get index of EPG at site level
        else:
            epg_idx = epgs.index(epg_ref)
            epg_path = '/sites/{0}/anps/{1}/epgs/{2}'.format(site_template, anp, epg)
            mso.existing = schema_obj.get('sites')[site_idx]['anps'][anp_idx]['epgs'][epg_idx]
            payload = new_epg

    ops = []

    if state == 'query':
        if anp_ref not in anps:
            mso.fail_json(msg="Provided anp '{0}' does not exist at site level.".format(anp))
        if epg is None:
            mso.existing = schema_obj.get('sites')[site_idx]['anps'][anp_idx]['epgs']
        elif not mso.existing:
            mso.fail_json(msg="EPG '{epg}' not found".format(epg=epg))
        mso.exit_json()

    mso.previous = mso.existing

    if state == 'absent':
        if mso.existing:
            mso.sent = mso.existing = {}
            ops.append(dict(op='remove', path=epg_path))

    elif state == 'present':

        if private_link_label is not None:
            payload['privateLinkLabel'] = dict(name=private_link_label)

        mso.sanitize(payload, collate=True)

        if mso.existing:
            ops.append(dict(op='replace', path=epg_path, value=mso.sent))
        else:
            ops.append(dict(op='add', path=op_path + '/-', value=mso.sent))

        mso.existing = mso.proposed

    if not module.check_mode:
        mso.request(schema_path, method='PATCH', data=ops)

    mso.exit_json()


if __name__ == "__main__":
    main()