---
- name: Debug distribution information
  debug:
    msg: 
      - "Distribution: {{ ansible_facts['distribution'] }}"
      - "Distribution Release: {{ ansible_facts['distribution_release'] }}"
      - "Distribution Version: {{ ansible_facts['distribution_version'] }}"
      - "OS Family: {{ ansible_facts['os_family'] }}"

- name: Check if Docker is already installed
  command: docker --version
  register: docker_check
  ignore_errors: true
  changed_when: false

- name: Check if Docker packages are installed via apt
  apt:
    list: docker-ce
  register: docker_apt_check
  changed_when: false

- name: Install Docker requirements
  apt:
    name:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg
      - lsb-release
    state: present
    update_cache: yes

- name: Remove old Docker repository files
  file:
    path: "{{ item }}"
    state: absent
  loop:
    - /etc/apt/sources.list.d/docker.list
    - /etc/apt/sources.list.d/docker-ce.list
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Create keyrings directory
  file:
    path: /etc/apt/keyrings
    state: directory
    mode: '0755'
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Download Docker's official GPG key
  get_url:
    url: https://download.docker.com/linux/ubuntu/gpg
    dest: /etc/apt/keyrings/docker.gpg
    mode: '0644'
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Add Docker repository for Ubuntu
  apt_repository:
    repo: "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
    state: present
  when: 
    - ansible_facts['distribution'] == "Ubuntu"
    - docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Add Docker repository for Debian
  apt_repository:
    repo: "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/debian {{ ansible_distribution_release }} stable"
    state: present
  when: 
    - ansible_facts['distribution'] == "Debian"
    - docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Add Docker repository for Linux Mint
  apt_repository:
    repo: "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
    state: present
  when: 
    - ansible_facts['distribution'] == "Linux Mint"
    - docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Update apt cache after Docker repo add
  apt:
    update_cache: yes
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Install Docker CE
  apt:
    name:
      - docker-ce
      - docker-ce-cli
      - containerd.io
      - docker-buildx-plugin
      - docker-compose-plugin
    state: present
    update_cache: yes
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Start and enable Docker service
  systemd:
    name: docker
    state: started
    enabled: yes
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Add user to docker group
  user:
    name: "{{ ansible_user }}"
    groups: docker
    append: yes
  when: docker_check.rc != 0 or docker_apt_check.results[0].installed is not defined

- name: Display Docker status
  debug:
    msg: 
      - "Docker already installed: {{ docker_check.stdout if docker_check.rc == 0 else 'Not found' }}"
      - "Docker CE package installed: {{ 'Yes' if docker_apt_check.results[0].installed is defined else 'No' }}"
      - "Actions taken: {{ 'None - Docker already present' if docker_check.rc == 0 and docker_apt_check.results[0].installed is defined else 'Docker installation/configuration performed' }}"