---
- name: Validate k3s_state parameter
  ansible.builtin.assert:
    that:
      - k3s_state in ['installed', 'latest', 'absent']
    fail_msg: "k3s_state must be one of: installed, latest, absent"
    quiet: true
  tags: always

- name: Check if k3s binary exists
  ansible.builtin.stat:
    path: /usr/local/bin/k3s
  register: _k3s_binary
  tags: always

- name: Set k3s installation fact
  ansible.builtin.set_fact:
    _k3s_installed: "{{ _k3s_binary.stat.exists }}"
  tags: always

- name: Display k3s state
  ansible.builtin.debug:
    msg:
      - "Desired state: {{ k3s_state }}"
      - "Currently installed: {{ _k3s_installed }}"
    verbosity: 1
  tags: always

# The actual k3s installation/management is handled by the external
# k3s-io/k3s-ansible collection (k3s.orchestration.k3s_server) which
# is invoked directly from containers.yaml. This role only provides
# detection and state validation as a lightweight wrapper.

- name: Uninstall k3s
  when:
    - k3s_state == 'absent'
    - _k3s_installed | bool
  tags: k3s, uninstall
  block:
    - name: Run k3s uninstall script
      ansible.builtin.command:
        cmd: /usr/local/bin/k3s-uninstall.sh
        removes: /usr/local/bin/k3s-uninstall.sh
      register: _k3s_uninstall
      changed_when: _k3s_uninstall.rc == 0

    - name: Run k3s agent uninstall script (if present)
      ansible.builtin.command:
        cmd: /usr/local/bin/k3s-agent-uninstall.sh
        removes: /usr/local/bin/k3s-agent-uninstall.sh
      register: _k3s_agent_uninstall
      changed_when: _k3s_agent_uninstall.rc == 0

    - name: Verify k3s binary is removed
      ansible.builtin.stat:
        path: /usr/local/bin/k3s
      register: _k3s_post_uninstall

    - name: Confirm k3s removal
      ansible.builtin.assert:
        that:
          - not _k3s_post_uninstall.stat.exists
        fail_msg: "k3s binary still exists after uninstall"
        quiet: true

- name: Show skip message when already installed
  ansible.builtin.debug:
    msg: "k3s is already installed — use the k3s.orchestration collection for upgrades"
  when:
    - k3s_state in ['installed', 'latest']
    - _k3s_installed | bool
  tags: k3s

- name: Show skip message when not installed and absent requested
  ansible.builtin.debug:
    msg: "k3s is not installed — nothing to remove"
  when:
    - k3s_state == 'absent'
    - not (_k3s_installed | bool)
  tags: k3s