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

# (c) 2022, Johanna Dorothea Reichmann <transcaffeine@finally.coffee>

__metaclass__ = type

import json

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.finallycoffee.proxmox.plugins.module_utils.common import *
from ansible_collections.finallycoffee.proxmox.plugins.module_utils.proxmox_node_iface import *

DOCUMENTATION = r'''
---
module: node_interface
author:
- Johanna Dorothea Reichmann (transcaffeine@finally.coffee)
requirements:
    - python >= 3.9
short_description: Configures an authentication realm in a proxmox node
description:
    - "Configue realm in a proxmox instance"
options:
    proxmox_instance:
        description: Location of the proxmox API with scheme, domain name/ip and port, e.g. https://localhost:8006
        type: str
        required: true
    proxmox_api_token_id:
        description: The token ID containing username, realm and token name (format: user@realm!name)
        type: str
        required: true
    proxmox_api_secret:
        description: The secret
        type: str
        required: true
    proxmox_api_verify_cert:
        description: If the certificate presented for `proxmox_instance_url` should be verified
        type: bool
        required: false
        default: true
    node:
        description: Node to retrieve information about.
        type: str
        required: true
    name:
        description: Interface to retrieve information about. If left omitted, return all realms
        type: str
        required: false
    config:
        description: Configuration of the interface, see https://pve.proxmox.com/pve-docs/api-viewer/index.html#/nodes/{node}/network/{iface} for parameters
        type: dict[str, str]
        required: false
    state:
        description: If the realm should be present or absent
        type: str
        choices: [present, absent]
        default: present
        required: false
'''

EXAMPLES = r'''
- name: Add and configure a new interface of type 'bond' on node 'hostname'
  finallycoffee.proxmox.node_interface:
    proxmox_instance: https://my.proxmox-node.local:8006
    promox_api_token_id: root@pam!token
    proxmox_api_secret: supersecuretokencontent
    node: hostname
    name: my_bond_iface
    type: bond
      config: bond_mode: balance-rr
      bond-primary: enp0s1
      config:
        slaves: enp0s1 enp0s2 enp0s3

- name: Change CIDR range on interface 'vmbr0' on 'other_pm_host'
  finallycoffee.proxmox.node_interface:
    proxmox_instance: https://my.proxmox-node.local:8006
    promox_api_token_id: root@pam!token
    proxmox_api_secret: supersecuretokencontent
    node: other_pm_host
    name: vmbr0
    type: bridge
    config:
      cidr: "1.2.3.4/8"
'''

RETURN = r'''
interfaces:
    description: The retrieved interfaces on the specified nodes
    returned: When interfaces are present on a node
    type: list
    elements: dict[str, str]

'''


def main():
    _ = dict
    module = AnsibleModule(
        argument_spec=_(
            proxmox_instance=_(required=True, type='str'),
            proxmox_api_token_id=_(required=True, type='str'),
            proxmox_api_secret=_(type='str', required=True, no_log=True),
            proxmox_api_verify_cert=_(type='bool', required=False, default=True),
            node=_(required=True, type='str'),
            name=_(required_if=['state', 'present'], type='str'),
            type=_(type='str', choices=PM_ACCEPTED_IFACE_TYPES),
            config=_(required_if=['state', 'present'], type='dict'),
            state=_(type='str', required=False, default='present', choices=['present', 'absent'])
        ),
        supports_check_mode=True
    )

    result = _(
        changed=False,
        diff={},
        message=''
    )

    realms = []
    try:
        interfaces = set_interface_config(ProxmoxAuthInfo(
            module.params['proxmox_instance'],
            module.params['proxmox_api_token_id'],
            module.params['proxmox_api_secret'],
            module.params['proxmox_api_verify_cert'],
        ), module.params['node'], module.params['name'], module.params['type'], module.params['config'],
            module.check_mode,
            module.params['state'])
    except IOError as owie:
        result['msg'] = owie
        module.exit_json(**result)

    result['interfaces'] = interfaces
    diff_rendered = _render_diff(interfaces[0], interfaces[1])
    result['diff'] = {
        'before_header': _render_diff_header(interfaces[0], module),
        'after_header': _render_diff_header(interfaces[1], module),
        'before': diff_rendered[0],
        'after': diff_rendered[1],
    }
    result['changed'] = interfaces[0] != interfaces[1]

    module.exit_json(**result)


def _render_diff_header(iface: dict[str, str], module: AnsibleModule) -> str:
    return (f"{iface.get('name', module.params['name'])}@{iface.get('node', module.params['node'])}"
            if iface else '')


def _render_diff(before: dict[str, str] | None, after: dict[str, str] | None) -> (str, str):
    is_update: bool = (before and after)
    after = after or {}
    before = before or {}
    diff_excluded_keys = {'name', 'digest', 'node', 'iface'}

    after_filtered = {k: v for k, v in after.items() if k not in diff_excluded_keys}
    before_filtered = {k: v for k, v in before.items() if k not in diff_excluded_keys}

    before_clean = {k: v for k, v in before_filtered.items() if (k in after_filtered.keys() if is_update else True)}

    before_str = "\n".join([f"{k}: {v}" for k, v in sorted(before_clean.items(), key=lambda e: e[0])])
    after_str = "\n".join([f"{k}: {v}" for k, v in sorted(after_filtered.items(), key=lambda e: e[0])])
    return before_str + ("\n" if before_str else ''), after_str + ("\n" if after_str else '')


if __name__ == '__main__':
    main()