---
- name: Crea cartella app
  ansible.builtin.file:
    path: /opt/application-consumption-demo-algorithm
    state: directory
    mode: '0755'

- name: Render env file applicativo
  ansible.builtin.template:
    src: app.env.j2
    dest: /opt/application-consumption-demo-algorithm/app.env
    mode: '0600'

- name: Ferma eventuale container precedente
  community.docker.docker_container:
    name: "{{ container_name }}"
    state: absent

- name: Calcola platform effettiva
  ansible.builtin.set_fact:
    effective_image_platform: >-
      {{
        (image_platform | default(''))
        if (image_platform | default('')) != 'auto'
        else
        ('linux/amd64' if ansible_architecture in ['x86_64', 'amd64']
         else ('linux/arm64' if ansible_architecture in ['aarch64', 'arm64'] else ''))
      }}

- name: Pull immagine primaria (digest o tag)
  ansible.builtin.command: >-
    docker pull{% if effective_image_platform | length > 0 %} --platform {{ effective_image_platform }}{% endif %} {{ container_image_ref }}
  register: primary_pull
  changed_when: primary_pull.rc == 0
  failed_when: false

- name: Fallback pull tramite tag se digest non compatibile
  ansible.builtin.command: >-
    docker pull{% if effective_image_platform | length > 0 %} --platform {{ effective_image_platform }}{% endif %} {{ container_image }}:{{ image_tag }}
  register: fallback_pull
  changed_when: fallback_pull.rc == 0
  failed_when: false
  when:
    - primary_pull.rc != 0
    - image_digest | default('') | length > 0

- name: Valida esito pull immagine
  ansible.builtin.assert:
    that:
      - primary_pull.rc == 0 or (fallback_pull is defined and fallback_pull.rc == 0)
    fail_msg: >-
      Pull fallito sia per {{ container_image_ref }} sia per {{ container_image }}:{{ image_tag }}
      su platform {{ effective_image_platform | default('default') }}.
      Verifica manifest compatibile con l'architettura host oppure pubblica immagine multi-arch.

- name: Seleziona riferimento immagine effettivo
  ansible.builtin.set_fact:
    pulled_image_ref: >-
      {{
        container_image_ref
        if primary_pull.rc == 0
        else (container_image ~ ':' ~ image_tag)
      }}

- name: Avvia container ML app
  community.docker.docker_container:
    name: "{{ container_name }}"
    image: "{{ pulled_image_ref }}"
    state: started
    restart_policy: unless-stopped
    ports:
      - "{{ app_port }}:5000"
    env_file: /opt/application-consumption-demo-algorithm/app.env