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

# (c) 2017, Ansible by Red Hat, inc
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function

__metaclass__ = type


DOCUMENTATION = """
module: eos_lldp
author: Ganesh Nalawade (@ganeshrn)
short_description: Manage LLDP configuration on Arista EOS network devices
description:
- This module provides declarative management of LLDP service on Arista EOS network
  devices.
version_added: 1.0.0
notes:
- Tested against EOS 4.15
options:
  state:
    description:
    - State of the LLDP configuration. If value is I(present) lldp will be enabled
      else if it is I(absent) it will be disabled.
    default: present
    type: str
    choices:
    - present
    - absent
    - enabled
    - disabled
extends_documentation_fragment:
- arista.eos.eos
"""

EXAMPLES = """
- name: Enable LLDP service
  arista.eos.eos_lldp:
    state: present

- name: Disable LLDP service
  arista.eos.eos_lldp:
    state: absent
"""

RETURN = """
commands:
  description: The list of configuration mode commands to send to the device
  returned: always, except for the platforms that use Netconf transport to manage the device.
  type: list
  sample:
    - lldp run
"""
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.arista.eos.plugins.module_utils.network.eos.eos import (
    get_config,
    load_config,
)
from ansible_collections.arista.eos.plugins.module_utils.network.eos.eos import (
    eos_argument_spec,
)


def has_lldp(module):
    config = get_config(module, flags=["| section lldp"])

    is_lldp_enable = False
    if "no lldp run" not in config:
        is_lldp_enable = True

    return is_lldp_enable


def main():
    """ main entry point for module execution
    """
    argument_spec = dict(
        state=dict(
            default="present",
            choices=["present", "absent", "enabled", "disabled"],
        )
    )

    argument_spec.update(eos_argument_spec)

    module = AnsibleModule(
        argument_spec=argument_spec, supports_check_mode=True
    )

    warnings = list()

    result = {"changed": False}

    if warnings:
        result["warnings"] = warnings

    HAS_LLDP = has_lldp(module)

    commands = []

    if module.params["state"] == "absent" and HAS_LLDP:
        commands.append("no lldp run")
    elif module.params["state"] == "present" and not HAS_LLDP:
        commands.append("lldp run")

    result["commands"] = commands

    if commands:
        commit = not module.check_mode
        response = load_config(module, commands, commit=commit)
        if response.get("diff") and module._diff:
            result["diff"] = {"prepared": response.get("diff")}
        result["session_name"] = response.get("session")
        result["changed"] = True

    module.exit_json(**result)


if __name__ == "__main__":
    main()