#!/usr/bin/python
#
# Copyright (c) 2018, Luca 'remix_tj' Lorenzetto <lorenzetto.luca@gmail.com>
#
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
#

from __future__ import annotations

DOCUMENTATION = r"""
module: emc_vnx_sg_member

short_description: Manage storage group member on EMC VNX


description:
  - This module manages the members of an existing storage group.
extends_documentation_fragment:
  - community.general.emc.emc_vnx
  - community.general.attributes

attributes:
  check_mode:
    support: full
  diff_mode:
    support: none

options:
  name:
    description:
      - Name of the Storage group to manage.
    required: true
    type: str
  lunid:
    description:
      - LUN ID to be added.
    required: true
    type: int
  state:
    description:
      - Indicates the desired lunid state.
      - V(present) ensures specified O(lunid) is present in the Storage Group.
      - V(absent) ensures specified O(lunid) is absent from Storage Group.
    default: present
    choices: ["present", "absent"]
    type: str


author:
  - Luca 'remix_tj' Lorenzetto (@remixtj)
"""

EXAMPLES = r"""
- name: Add lun to storage group
  community.general.emc_vnx_sg_member:
    name: sg01
    sp_address: sp1a.fqdn
    sp_user: sysadmin
    sp_password: sysadmin
    lunid: 100
    state: present

- name: Remove lun from storage group
  community.general.emc_vnx_sg_member:
    name: sg01
    sp_address: sp1a.fqdn
    sp_user: sysadmin
    sp_password: sysadmin
    lunid: 100
    state: absent
"""

RETURN = r"""
hluid:
  description: LUNID visible to hosts attached to the storage group.
  type: int
  returned: success
"""

import traceback

from ansible.module_utils.basic import AnsibleModule, missing_required_lib

from ansible_collections.community.general.plugins.module_utils.storage.emc.emc_vnx import emc_vnx_argument_spec

LIB_IMP_ERR = None
try:
    from storops import VNXSystem
    from storops.exception import (
        VNXAluAlreadyAttachedError,
        VNXAttachAluError,
        VNXCredentialError,
        VNXDetachAluNotFoundError,
        VNXStorageGroupError,
    )

    HAS_LIB = True
except Exception:
    LIB_IMP_ERR = traceback.format_exc()
    HAS_LIB = False


def run_module():
    module_args = dict(
        name=dict(type="str", required=True),
        lunid=dict(type="int", required=True),
        state=dict(default="present", choices=["present", "absent"]),
    )

    module_args.update(emc_vnx_argument_spec)

    result = dict(changed=False, hluid=None)

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

    if not HAS_LIB:
        module.fail_json(msg=missing_required_lib("storops >= 0.5.10"), exception=LIB_IMP_ERR)

    sp_user = module.params["sp_user"]
    sp_address = module.params["sp_address"]
    sp_password = module.params["sp_password"]
    alu = module.params["lunid"]

    # if the user is working with this module in only check mode we do not
    # want to make any changes to the environment, just return the current
    # state with no modifications
    if module.check_mode:
        return result

    try:
        vnx = VNXSystem(sp_address, sp_user, sp_password)
        sg = vnx.get_sg(module.params["name"])
        if sg.existed:
            if module.params["state"] == "present":
                if not sg.has_alu(alu):
                    try:
                        result["hluid"] = sg.attach_alu(alu)
                        result["changed"] = True
                    except VNXAluAlreadyAttachedError:
                        result["hluid"] = sg.get_hlu(alu)
                    except (VNXAttachAluError, VNXStorageGroupError) as e:
                        module.fail_json(msg=f"Error attaching {alu}: {e} ", **result)
                else:
                    result["hluid"] = sg.get_hlu(alu)
            if module.params["state"] == "absent" and sg.has_alu(alu):
                try:
                    sg.detach_alu(alu)
                    result["changed"] = True
                except VNXDetachAluNotFoundError:
                    # being not attached when using absent is OK
                    pass
                except VNXStorageGroupError as e:
                    module.fail_json(msg=f"Error detaching alu {alu}: {e} ", **result)
        else:
            module.fail_json(msg=f"No such storage group named {module.params['name']}", **result)
    except VNXCredentialError as e:
        module.fail_json(msg=f"{e}", **result)

    module.exit_json(**result)


def main():
    run_module()


if __name__ == "__main__":
    main()