---

- name: Install MariaDB
  apt:
    name:
      - mariadb-client
      - mariadb-server
      - python-mysqldb
    state: present

- name: Enable MariaDB service on boot (workaround for systemctl broken handling of SysV)
  command: rcconf -on mysql
  register: result
  changed_when: not result.stderr

- name: Enable and start MariaDB
  service:
    name: mysql
    state: started

- name: Set password for the root database user
  mysql_user:
    check_implicit_admin: true
    name: root
    password: "{{ db_root_password }}"

- name: Deploy username and password for the root database user
  template:
    src: "root_my.cnf.j2"
    dest: "/root/.my.cnf"
    owner: root
    group: root
    mode: 0400

- name: Check if root user authentication is based on use of unix_socket module
  command: mysql --skip-column-names -B -e "select 1 from mysql.user where user='root' and plugin='unix_socket';"
  register: "root_using_unix_socket_authentication"
  changed_when: false

# @TODO: This is essentially a leftover from the days of Debian
#        Jessie, which by default did not use unix socket
#        authentication for the root account. To make the deployment
#        the same on both distros, unix socket authentication was
#        disabled on Debian Stretch at the time. It might be worth the
#        effort to revisit this and figure out if unix socket
#        authentication should be reenabled instead (and whether
#        password for the root account should be used at all).
- name: Disable use of unix socket login
  command: "mysql -B -e \"update mysql.user set plugin='' where user='root' and plugin='unix_socket'; flush privileges;\""
  when: "root_using_unix_socket_authentication.stdout"

- name: Set UTF-8 encoding as default for MariaDB
  copy:
    src: "utf8.cnf"
    dest: "/etc/mysql/mariadb.conf.d/90-utf8.cnf"
    owner: root
    group: root
    mode: 0644
  register: mariadb_utf8_configuration

- name: Restart MariaDB in order to use UTF-8 as default character set
  service:
    name: mysql
    state: restarted
  when: mariadb_utf8_configuration.changed
  tags:
    # [ANSIBLE0016] Tasks that run when changed should likely be handlers
    #   UTF-8 configuration must be applied immediatelly in order to ensure that
    #   subsequent tasks that create databases will end-up with correct (UTF-8)
    #   encoding. Otherwise they will be created using default latin1.
    - skip_ansible_lint

- name: Explicitly run all handlers
  include: ../handlers/main.yml
  when: "run_handlers | default(False) | bool()"
  tags:
    - handlers