# SPDX-FileCopyrightText: 2026 Slavi Pantaleev
#
# SPDX-License-Identifier: AGPL-3.0-or-later

---

# Makes the declared bot list authoritative: anything Meowlnir still knows about but which is no longer declared gets removed.
# Meowlnir's own records are re-read first, because the provisioning that just ran will have changed them.

- name: Re-read Meowlnir's bots before pruning
  ansible.builtin.include_tasks: "{{ role_path }}/tasks/util/read_meowlnir_state.yml"

- name: Determine which Meowlnir bots are no longer declared
  ansible.builtin.set_fact:
    matrix_bot_meowlnir_undeclared_bots: >-
      {{
        matrix_bot_meowlnir_live_bots
        | rejectattr('username', 'in', matrix_bot_meowlnir_bots | map(attribute='username') | list)
        | list
      }}

- name: Fail if pruning would remove every Meowlnir bot
  ansible.builtin.fail:
    msg: >-
      No bots are declared in `matrix_bot_meowlnir_bots`, but Meowlnir still has
      {{ matrix_bot_meowlnir_undeclared_bots | length }} of them
      ({{ matrix_bot_meowlnir_undeclared_bots | map(attribute='username') | join(', ') }}).
      Removing them would make Meowlnir forget them along with their management rooms, so the
      playbook will not act on what is far more often a mistake (a commented-out block, an
      unset variable) than an instruction.
      If you really do want them all gone, set
      `matrix_bot_meowlnir_bots_pruning_on_empty_roster_enabled: true`.
      To stop the playbook managing bots at all, set
      `matrix_bot_meowlnir_bots_pruning_enabled: false`.
  when: >-
    matrix_bot_meowlnir_bots | length == 0
    and matrix_bot_meowlnir_undeclared_bots | length > 0
    and not matrix_bot_meowlnir_bots_pruning_on_empty_roster_enabled | bool

- name: Remove management rooms which are no longer declared
  ansible.builtin.include_tasks: "{{ role_path }}/tasks/util/prune_bot_management_rooms.yml"
  with_items: "{{ matrix_bot_meowlnir_live_bots }}"
  loop_control:
    loop_var: live_bot

- name: Remove Meowlnir bots which are no longer declared
  ansible.builtin.include_tasks: "{{ role_path }}/tasks/util/prune_bot.yml"
  with_items: "{{ matrix_bot_meowlnir_undeclared_bots }}"
  loop_control:
    loop_var: live_bot