#- name: Check if docker is already installed
#  stat:
#    path: /usr/bin/docker
#  register: docker_file

- name: Install Packages
#  when: docker_file.stat.exists == False
  package:
      name:
          - gpg
          - gpg-agent
          - python3-debian
  tags: docker_repo

- name: Create apt keyrings directory
  file:
      path: /etc/apt/keyrings
      state: directory
      mode: "0755"
  tags: docker_repo

- name: Add docker-key
  get_url:
      url: "https://download.docker.com/linux/{{ ansible_facts.distribution | lower }}/gpg"
      dest: /etc/apt/keyrings/docker.asc
      mode: "0644"
  tags: docker_repo

- name: Remove one-line docker-repository
  file:
      path: /etc/apt/sources.list.d/docker.list
      state: absent
  tags: docker_repo

- name: Add docker-repository
  deb822_repository:
      name: docker
      types: deb
      uris: "https://download.docker.com/linux/{{ ansible_facts.distribution | lower }}"
      suites: "{{ ansible_facts.distribution_release }}"
      components: stable
      signed_by: /etc/apt/keyrings/docker.asc
  register: docker_repo
  tags: docker_repo

- name: Update apt cache after docker-repository change
  apt:
      update_cache: yes
  when: docker_repo.changed
  tags: docker_repo

- name: Install docker
  package:
      name:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-compose-plugin
          - pass
      state: latest

- name: Read daemon.json
  ansible.builtin.slurp:
      path: /etc/docker/daemon.json
  register: docker_daemon_json
  failed_when: false
  tags: docker_daemon

- name: Merge daemon options into daemon.json
  vars:
      docker_daemon_current: "{{ (docker_daemon_json.content | b64decode | from_json) if docker_daemon_json.content is defined else {} }}"
      docker_daemon_merged: "{{ docker_daemon_current | combine(docker.daemon) }}"
  ansible.builtin.copy:
      content: "{{ docker_daemon_merged | to_nice_json(indent=4, sort_keys=False) }}\n"
      dest: /etc/docker/daemon.json
      owner: root
      group: root
      mode: "0644"
      validate: dockerd --validate --config-file=%s
  # Rewritten only on a value change, so hand-written formatting survives otherwise.
  when: docker_daemon_merged != docker_daemon_current
  notify: reload_docker
  tags: docker_daemon

- name: Deploy docker-compose command to new docker compose plugin
  ansible.builtin.copy:
    src: docker-compose
    dest: "/usr/local/bin/docker-compose"
    mode: "0755"

- name: Check for docker binary
  ansible.builtin.stat:
      path: /usr/bin/docker
  register: docker_binary
  tags: docker_prune

- name: Deploy docker-prune script
  ansible.builtin.copy:
      src: docker-prune
      dest: /usr/local/sbin/docker-prune
      owner: root
      group: root
      mode: "0755"
  when: docker_binary.stat.exists
  tags: docker_prune

- name: Schedule hourly docker-prune
  ansible.builtin.cron:
      name: docker prune
      cron_file: docker-prune
      user: root
      minute: "0"
      job: /usr/local/sbin/docker-prune
  when: docker_binary.stat.exists
  tags: docker_prune