---

- name: Disable pinned Docker version
  file:
    dest: "/etc/apt/preferences.d/docker-ce.pref"
    state: "absent"
  when: not docker__version | d()

- name: Enable pinned Docker version
  template:
    src: "etc/apt/preferences.d/docker-ce.pref.j2"
    dest: "/etc/apt/preferences.d/docker-ce.pref"
    owner: "root"
    group: "root"
    mode: "0644"
  when: docker__version | d()

- name: Install Docker's dependencies
  apt:
    name: "{{ docker__package_dependencies + docker__pip_dependencies }}"

- name: Add Docker's public PGP key to the APT keyring
  apt_key:
    id: "{{ docker__apt_key_id }}"
    url: "{{ docker__apt_key_url }}"

- name: Configure Docker's upstream APT repository
  apt_repository:
    repo: "{{ docker__apt_repository }}"
    update_cache: true

- name: Install Docker
  apt:
    name: "docker-{{ docker__edition }}"
    state: "{{ docker__state }}"

- name: Check for existing Docker Compose file
  stat:
    path: "/usr/local/bin/docker-compose"
  register: docker__register_docker_compose

- name: Remove Docker Compose if it's been installed without PIP
  file:
    path: "/usr/local/bin/docker-compose"
    state: "absent"
  when:
    - docker__register_docker_compose.stat.exists
    - docker__register_docker_compose.stat.isreg | d(false)

- name: Install Virtualenv
  pip:
    name: "virtualenv"

- name: Install Python packages
  pip:
    name: >
      {{ item.name }}{% if item.version | d() %}=={{ item.version }}{% endif %}
    virtualenv: "{{ docker__pip_virtualenv }}"
    state: "{{ item.state | d('present') }}"
  loop: "{{ docker__default_pip_packages + docker__pip_packages }}"
  when: item.name | d()

- name: Symlink Python binary to /usr/local/bin/python-docker
  file:
    path: "/usr/local/bin/python-docker"
    src: "{{ docker__pip_virtualenv }}/bin/python"
    state: "link"

- name: Symlink selected Python package binaries to /usr/local/bin
  file:
    path: "{{ item.path }}"
    src: "{{ item.src }}"
    state: "link"
  loop: "{{ docker__default_pip_packages + docker__pip_packages }}"
  when:
    - item.state | d("present") != "absent"
    - item.path | d() and item.src | d()

- name: Add user(s) to "docker" group
  user:
    name: "{{ item }}"
    groups: "docker"
    append: true
  loop: "{{ docker__users }}"

- name: Create Docker configuration directories
  file:
    path: "{{ item }}"
    state: "directory"
    owner: "root"
    group: "root"
    mode: "0755"
  loop:
    - "/etc/docker"
    - "/etc/systemd/system/docker.service.d"

- name: Configure Docker daemon options (json)
  template:
    src: "etc/docker/daemon.json.j2"
    dest: "/etc/docker/daemon.json"
    owner: "root"
    group: "root"
    mode: "0644"
  when: docker__default_daemon_json or docker__daemon_json
  notify: ["Restart Docker"]

- name: Configure Docker daemon options (flags)
  template:
    src: "etc/systemd/system/docker.service.d/options.conf.j2"
    dest: "/etc/systemd/system/docker.service.d/options.conf"
    owner: "root"
    group: "root"
    mode: "0644"
  register: docker__register_daemon_flags
  when: docker__daemon_flags
  notify: ["Restart Docker"]

- name: Configure Docker daemon environment variables
  template:
    src: "etc/systemd/system/docker.service.d/environment.conf.j2"
    dest: "/etc/systemd/system/docker.service.d/environment.conf"
    owner: "root"
    group: "root"
    mode: "0644"
  register: docker__register_daemon_environment
  when: docker__daemon_environment
  notify: ["Restart Docker"]

- name: Configure custom systemd unit file override
  template:
    src: "etc/systemd/system/docker.service.d/custom.conf.j2"
    dest: "/etc/systemd/system/docker.service.d/custom.conf"
    owner: "root"
    group: "root"
    mode: "0644"
  register: docker__register_custom_override
  when: docker__systemd_override | d()
  notify: ["Restart Docker"]

- name: Reload systemd daemon
  systemd:
    daemon_reload: true
  when: (docker__register_daemon_flags | d() and
         docker__register_daemon_flags is changed)
         or (docker__register_daemon_environment | d() and
         docker__register_daemon_environment is changed)
         or (docker__register_custom_override | d() and
         docker__register_custom_override is changed)
  notify: ["Restart Docker"]

- name: Restart Docker now to make sure `docker login` works
  meta: "flush_handlers"

- name: Manage Docker registry login credentials
  docker_login:
    registry_url: "{{ item.registry_url | d(omit) }}"
    username: "{{ item.username }}"
    password: "{{ item.password }}"
    email: "{{ item.email | d(omit) }}"
    reauthorize: "{{ item.reauthorize | d(omit) }}"
    config_path: "{{ item.config_path | d((ansible_env.PWD | d('/root')) + '/.docker/config.json') }}"
    state: "{{ item.state | d('present') }}"
  loop: "{{ docker__registries }}"
  when: item.username | d() and item.password | d()
  vars:
    ansible_python_interpreter: "{{ '/usr/bin/env python-docker' if docker__pip_virtualenv | d() else ansible_python.executable }}"

- name: Remove Docker related cron jobs
  file:
    path: "/etc/cron.d/{{ item.cron_file }}"
    state: "absent"
  loop: "{{ docker__cron_jobs }}"
  when:
    - item.state | d("present") == "absent"
    - item.name | d() and item.job | d()
    - item.schedule | d() and item.cron_file | d()

- name: Create Docker related cron jobs
  cron:
    name: "{{ item.name }}"
    job: "{{ item.job }}"
    minute: "{{ item.schedule[0] }}"
    hour: "{{ item.schedule[1] }}"
    day: "{{ item.schedule[2] }}"
    month: "{{ item.schedule[3] }}"
    weekday: "{{ item.schedule[4] }}"
    cron_file: "{{ item.cron_file }}"
    user: "{{ item.user | d('root') }}"
  loop: "{{ docker__cron_jobs }}"
  when:
    - item.state | d("present") != "absent"
    - item.name | d() and item.job | d()
    - item.schedule | d() and item.cron_file | d()