---
- name: Sanity check
  ansible.builtin.assert:
    that:
      - hostname_replication_primary is defined
      - db_server_id is defined

- name: Install software
  ansible.builtin.package:
    name: "{{ item }}"
    state: present
  with_items: "{{ db_packages }}"

- name: "Quick-Fix MariaDB/systemd problems"
  ansible.builtin.lineinfile:
    path: /usr/lib/systemd/system/mariadb.service
    regexp: "^SendSIGKILL=no"
    line: "SendSIGKILL=yes"
    backup: true
  register: db_systemd_fix
  when: ansible_virtualization_type == "lxc"

- name: Reload systemd daemon # noqa: no-handler
  ansible.builtin.systemd:
    daemon_reload: true
  when: db_systemd_fix is changed

- name: 'Enable service "{{ db_servicename }}"'
  ansible.builtin.service:
    name: "{{ db_servicename }}"
    state: started
    enabled: true

- name: "Config: Listen on all ip addresses"
  ansible.builtin.lineinfile:
    path: /etc/mysql/mariadb.conf.d/50-server.cnf
    regexp: "^ *#* *bind-address"
    line: "bind-address = 0.0.0.0"
    backup: true
  notify: 'Restart MariaDB'

- name: "Config: Set server-id"
  ansible.builtin.lineinfile:
    dest: /etc/mysql/mariadb.conf.d/50-server.cnf
    regexp: "^ *#* *server-id"
    line: "server-id = {{ db_server_id }}"
    backup: true
  notify: 'Restart MariaDB'

- name: Ensure log directory is present
  ansible.builtin.file:
    path: /var/log/mysql
    state: directory
    owner: mysql
    group: mysql
    mode: "0770"

- name: "Config: Enable binlog"
  ansible.builtin.lineinfile:
    dest: /etc/mysql/mariadb.conf.d/50-server.cnf
    regexp: "^ *#* *log_bin"
    line: "log_bin = /var/log/mysql/mysql-bin.log"
    backup: true
  when: db_server_id == 1
  notify: 'Restart MariaDB'

- name: MariaDB create replication user
  community.mysql.mysql_user:
    name: "{{ db_repl_user }}"
    password: "{{ db_repl_password }}"
    priv: '*.*:REPLICATION SLAVE'
    host: "%"
    column_case_sensitive: true
    state: present
    login_unix_socket: /var/run/mysqld/mysqld.sock
  notify: 'Restart MariaDB'

- name: Get MariaDB master state
  community.mysql.mysql_info:
    filter: master_status
    login_unix_socket: /var/run/mysqld/mysqld.sock
  register: db_master_status

- name: "DEBUG»»» db_server_id / db_master_status.master_status"
  ansible.builtin.debug:
    msg:
      - "db_server_id: {{ db_server_id }}"
      - "db_master_status.master_status: {{ db_master_status.master_status }}"
  when: db_debug|default(false)

- name: "(Maybe) Restart MariaDB"
  ansible.builtin.meta: flush_handlers

- name: Get MariaDB master state
  community.mysql.mysql_info:
    filter: master_status
    login_unix_socket: /var/run/mysqld/mysqld.sock
  register: db_master_status_new

- name: "DEBUG»»» db_server_id / db_master_status_new.master_status"
  ansible.builtin.debug:
    msg:
      - "db_server_id: {{ db_server_id }}"
      - "db_master_status_new.master_status: {{ db_master_status_new.master_status|to_nice_json }}"
  when: db_debug|default(false)

- name: "(Master) Reset binlog" # noqa: no-changed-when
  ansible.builtin.command:
    cmd: '/usr/bin/mysql -u root -e "RESET MASTER"'
  when: db_server_id == 1 and db_master_status.master_status == {}

- name: "(Replica) Get status"
  community.mysql.mysql_replication:
    mode: getreplica
    login_unix_socket: /var/run/mysqld/mysqld.sock
  register: db_replica_status

- name: "DEBUG»»» db_replica_status"
  ansible.builtin.debug:
    var: db_replica_status
  when: db_debug|default(false)

- name: "(Replica) Block for replicas"
  when: db_server_id != 1 and db_replica_status.Slave_IO_Running|default("No") == "No"
  block:

  - name: "(Replica) Setup replication" # noqa: no-changed-when
    ansible.builtin.command:
      cmd: '/usr/bin/mysql -u root -e "CHANGE MASTER TO master_host=\"{{ hostvars[hostname_replication_primary]["ansible_default_ipv4"].address }}\", master_user=\"{{ db_repl_user }}\", master_password=\"{{ db_repl_password }}\", master_use_gtid=current_pos"' # noqa: yaml[line-length]

  - name: "(Replica) Start replica"
    community.mysql.mysql_replication:
      mode: startreplica
      login_unix_socket: /var/run/mysqld/mysqld.sock