---
- name: Assert QMD is only supported on Debian family
  ansible.builtin.assert:
    that:
      - ansible_facts.os_family == "Debian"
    fail_msg: "roles/vhosts/qmd currently supports Debian-based hosts only."

- name: Ensure QMD config and cache directories exist
  ansible.builtin.file:
    path: "{{ item.path }}"
    state: directory
    owner: "{{ qmd_user }}"
    group: "{{ qmd_group }}"
    mode: "{{ item.mode }}"
  loop:
    - path: "{{ qmd_config_dir }}"
      mode: "{{ qmd_config_dir_mode }}"
    - path: "{{ qmd_cache_dir }}"
      mode: "{{ qmd_cache_dir_mode }}"
    - path: "{{ qmd_mcp_service_unit_path | dirname }}"
      mode: "0755"

- name: Deploy QMD collection index config
  ansible.builtin.template:
    src: index.yml.j2
    dest: "{{ qmd_index_config_path }}"
    owner: "{{ qmd_user }}"
    group: "{{ qmd_group }}"
    mode: "{{ qmd_index_config_mode }}"

- name: Deploy QMD external embedding environment
  ansible.builtin.template:
    src: qmd.env.j2
    dest: "{{ qmd_env_path }}"
    owner: "{{ qmd_user }}"
    group: "{{ qmd_group }}"
    mode: "0600"
  diff: false

- name: Inspect QMD binary
  ansible.builtin.stat:
    path: "{{ qmd_binary_path }}"
  register: qmd_binary

- name: Fail when QMD binary is missing or not executable
  ansible.builtin.assert:
    that:
      - qmd_binary.stat.exists | default(false)
      - qmd_binary.stat.executable | default(false)
    fail_msg: "QMD binary is missing or not executable: {{ qmd_binary_path }}"

- name: Deploy QMD MCP user systemd unit
  ansible.builtin.template:
    src: qmd-mcp.user.service.j2
    dest: "{{ qmd_mcp_service_unit_path }}"
    owner: "{{ qmd_user }}"
    group: "{{ qmd_group }}"
    mode: "0644"
  register: qmd_mcp_user_service_unit

- name: Enable QMD service user linger
  ansible.builtin.command:
    cmd: "loginctl enable-linger {{ qmd_user }}"
    creates: "/var/lib/systemd/linger/{{ qmd_user }}"
  when:
    - not ansible_check_mode

- name: Ensure QMD service user manager is running
  ansible.builtin.systemd:
    name: "user@{{ qmd_service_uid }}.service"
    state: started
  when:
    - not ansible_check_mode

- name: Reload QMD user systemd manager
  ansible.builtin.command:
    cmd: systemctl --user daemon-reload
  environment:
    HOME: "{{ qmd_home }}"
    XDG_RUNTIME_DIR: "/run/user/{{ qmd_service_uid }}"
    DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ qmd_service_uid }}/bus"
  become: true
  become_user: "{{ qmd_user }}"
  changed_when: false
  when:
    - not ansible_check_mode

- name: Ensure QMD MCP daemon is enabled and running
  ansible.builtin.command:
    cmd: >-
      systemctl --user enable
      {{ '--now' if not (qmd_mcp_user_service_unit.changed | default(false)) else '' }}
      {{ qmd_mcp_service_name }}.service
  environment:
    HOME: "{{ qmd_home }}"
    XDG_RUNTIME_DIR: "/run/user/{{ qmd_service_uid }}"
    DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ qmd_service_uid }}/bus"
  become: true
  become_user: "{{ qmd_user }}"
  register: qmd_mcp_service_enable
  changed_when: >-
    'Created symlink' in (qmd_mcp_service_enable.stdout | default('')) or
    'Created symlink' in (qmd_mcp_service_enable.stderr | default(''))
  when:
    - not ansible_check_mode

- name: Restart QMD MCP daemon after unit changes
  ansible.builtin.command:
    cmd: "systemctl --user restart {{ qmd_mcp_service_name }}.service"
  environment:
    HOME: "{{ qmd_home }}"
    XDG_RUNTIME_DIR: "/run/user/{{ qmd_service_uid }}"
    DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ qmd_service_uid }}/bus"
  become: true
  become_user: "{{ qmd_user }}"
  when:
    - qmd_mcp_user_service_unit.changed | default(false)
    - not ansible_check_mode

- name: Validate QMD status
  ansible.builtin.command:
    cmd: "{{ qmd_binary_path }} status"
  environment:
    HOME: "{{ qmd_home }}"
    QMD_EMBED_API_BASE_URL: "{{ qmd_embed_api_base_url }}"
    QMD_EMBED_MODEL: "{{ qmd_embed_model }}"
  become: true
  become_user: "{{ qmd_user }}"
  register: qmd_status
  changed_when: false
  check_mode: false

- name: Show QMD validation summary
  ansible.builtin.debug:
    msg:
      - "QMD MCP URL: {{ qmd_mcp_url }}"
      - "QMD index config: {{ qmd_index_config_path }}"
      - "QMD embedding model: {{ qmd_embed_model }}"
      - "{{ qmd_status.stdout | default('') }}"