# ============================================================
# Docker Image Management Playbook
# ============================================================

- name: Docker Image Management
  hosts: "{{ target | default('all_managed') }}"
  become: true
  gather_facts: true

  vars:
    app_name:    mywebapp
    app_version: "1.0.0"

    # Images που χρειαζόμαστε
    required_images:
      - name:   nginx
        tag:    "1.25.3-alpine"
      - name:   postgres
        tag:    "15.4-alpine"
      - name:   redis
        tag:    "7.2-alpine"

  tasks:

    # ── Pull required images ───────────────────
    - name: Pull required images
      community.docker.docker_image:
        name:   "{{ item.name }}"
        tag:    "{{ item.tag }}"
        source: pull
      loop: "{{ required_images }}"
      loop_control:
        label: "{{ item.name }}:{{ item.tag }}"
      tags: [pull, images]

    # ── Verify images ──────────────────────────
    - name: Verify images are available
      community.docker.docker_image_info:
        name: "{{ required_images | map(attribute='name') | list }}"
      register: image_check
      tags: [verify, images]

    - name: Image verification report
      ansible.builtin.debug:
        msg:
          - "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
          - "Available Images"
          - "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
          - "{% for img in image_check.images %}\
             {{ img.RepoTags | first | default('untagged') }}: \
             {{ (img.Size / 1048576) | round(1) }}MB\
             {% endfor %}"
          - "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
      tags: [verify, images]

    # ── Prune old images ───────────────────────
    - name: Prune dangling images
      community.docker.docker_prune:
        images:         true
        images_filters:
          dangling: true
      tags: [cleanup, images]

    # ── Docker disk usage ─────────────────────
    - name: Show Docker disk usage
      ansible.builtin.command:
        cmd: docker system df
      register:     disk_usage
      changed_when: false
      tags: [verify, disk]

    - name: Disk usage report
      ansible.builtin.debug:
        msg: "{{ disk_usage.stdout_lines }}"
      tags: [verify, disk]