---
- name: Set Ubuntu codename for Linux Mint
  ansible.builtin.set_fact:
    docker_ubuntu_codename: >
      {{ 'jammy' if ansible_distribution_version is version('22', '>=') else
         'focal' if ansible_distribution_version is version('21', '>=') else
         'focal' if ansible_distribution_version is version('20', '>=') else
         'bionic' }}

- name: Check if Docker repository exists and is correct
  ansible.builtin.shell: |
    if [ -f /etc/apt/sources.list.d/docker.list ]; then
      if grep -q "deb \[arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg\] https://download.docker.com/linux/ubuntu" /etc/apt/sources.list.d/docker.list; then
        echo "correct_config"
      else
        echo "wrong_config"
      fi
    else
      echo "not_exists"
    fi
  register: docker_repo_check
  failed_when: false
  changed_when: false

- name: Remove incorrect Docker repository
  ansible.builtin.file:
    path: /etc/apt/sources.list.d/docker.list
    state: absent
  become: true
  when: docker_repo_check.stdout == "wrong_config"

- name: Add Docker repository for Linux Mint (using Ubuntu base) only if needed
  ansible.builtin.apt_repository:
    repo: "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu {{ docker_ubuntu_codename }} stable"
    state: present
    update_cache: false
  when: docker_repo_check.stdout in ["not_exists", "wrong_config"]

- name: Update apt cache after adding Docker repository
  ansible.builtin.apt:
    update_cache: true
  become: true
  when: docker_repo_check.stdout in ["not_exists", "wrong_config"]