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

# (c) 2018, Simon Dodsley (simon@purestorage.com)
# 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

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

DOCUMENTATION = r"""
---
module: purefa_banner
version_added: '1.0.0'
short_description: Configure Pure Storage FlashArray GUI and SSH MOTD message
description:
- Configure MOTD for Pure Storage FlashArrays.
- This will be shown during an SSH or GUI login to the array.
- Multiple line messages can be achieved using \\n.
author:
- Pure Storage Ansible Team (@sdodsley) <pure-ansible-team@purestorage.com>
options:
  state:
    description:
    - Set ot delete the MOTD
    default: present
    type: str
    choices: [ present, absent ]
  banner:
    description:
    - Banner text, or MOTD, to use
    type: str
    default: "Welcome to the machine..."
extends_documentation_fragment:
- purestorage.flasharray.purestorage.fa
"""

EXAMPLES = r"""
- name: Set new banner text
  purestorage.flasharray.purefa_banner:
    banner: "Banner over\ntwo lines"
    state: present
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592

- name: Delete banner text
  purestorage.flasharray.purefa_banner:
    state: absent
    fa_url: 10.10.10.2
    api_token: e31060a7-21fc-e277-6240-25983c6c4592
"""

RETURN = r"""
"""

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.purestorage.flasharray.plugins.module_utils.purefa import (
    get_system,
    purefa_argument_spec,
)


def set_banner(module, array):
    """Set MOTD banner text"""
    changed = True
    if not module.params["banner"]:
        module.fail_json(msg="Invalid MOTD banner given")
    if not module.check_mode:
        try:
            array.set(banner=module.params["banner"])
        except Exception:
            module.fail_json(msg="Failed to set MOTD banner text")

    module.exit_json(changed=changed)


def delete_banner(module, array):
    """Delete MOTD banner text"""
    changed = True
    if not module.check_mode:
        try:
            array.set(banner="")
        except Exception:
            module.fail_json(msg="Failed to delete current MOTD banner text")
    module.exit_json(changed=changed)


def main():
    argument_spec = purefa_argument_spec()
    argument_spec.update(
        dict(
            banner=dict(type="str", default="Welcome to the machine..."),
            state=dict(type="str", default="present", choices=["present", "absent"]),
        )
    )

    required_if = [("state", "present", ["banner"])]

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

    state = module.params["state"]
    array = get_system(module)
    current_banner = array.get(banner=True)["banner"]
    # set banner if empty value or value differs
    if state == "present" and (
        not current_banner or current_banner != module.params["banner"]
    ):
        set_banner(module, array)
    # clear banner if it has a value
    elif state == "absent" and current_banner:
        delete_banner(module, array)

    module.exit_json(changed=False)


if __name__ == "__main__":
    main()