---

- name: Install the MySQL dependencies on RedHat
  package:
    name: "{{ item }}"
    state: present
  with_items:
    - mysql
    - MySQL-python
  when: ansible_facts.os_family == 'RedHat'

- name: Install the MySQL dependencies on Debian
  package:
    name: "{{ item }}"
    state: present
  with_items:
    - mysql-client
    - python-mysqldb
  when: ansible_facts.os_family == 'Debian'

- name: Create the PowerDNS Authoritative Server MySQL databases
  mysql_db:
    login_user: "{{ item['value']['priv_user'] }}"
    login_password: "{{ item['value']['priv_password'] }}"
    login_host: "{{ item['value']['host'] }}"
    login_port: "{{ item['value']['port'] | default('3306') }}"
    name: "{{ item['value']['dbname'] }}"
    state: present
  when: "item.key.split(':')[0] == 'gmysql'"
  with_dict: "{{ pdns_backends | combine(pdns_mysql_databases_credentials, recursive=True) }}"

- name: Grant the PowerDNS Authoritative Server access to the MySQL databases
  mysql_user:
    login_user: "{{ item[0]['priv_user'] }}"
    login_password: "{{ item[0]['priv_password'] }}"
    login_host: "{{ item[0]['host'] }}"
    login_port: "{{ item[0]['port'] | default('3306') }}"
    name: "{{ item[0]['user'] }}"
    password: "{{ item[0]['password'] }}"
    host: "{{ item[1] }}"
    priv: "{{ item[0]['dbname'] }}.*:ALL"
    append_privs: yes
    state: present
  with_subelements:
    - "{{ pdns_backends | combine(pdns_mysql_databases_credentials, recursive=True) }}"
    - priv_host
    - skip_missing: yes

- name: Check if the PowerDNS Authoritative Server MySQL databases are empty
  command: >
    mysql --user="{{ item['value']['user'] }}" --password="{{ item['value']['password'] }}"
    --host="{{ item['value']['host'] }}" --port "{{ item['value']['port'] | default('3306') }}" --batch --skip-column-names
    --execute="SELECT COUNT(DISTINCT table_name) FROM information_schema.columns WHERE table_schema = '{{ item['value']['dbname'] }}'"
  when: item.key.split(':')[0] == 'gmysql'
  with_dict: "{{ pdns_backends }}"
  register: _pdns_check_mysql_db
  changed_when: False

- name: Define the PowerDNS Authoritative Server database MySQL schema file path on RedHat < 7
  set_fact:
    _pdns_mysql_schema_file: "/usr/share/doc/pdns/schema.mysql.sql"
  when: ansible_facts.os_family == 'RedHat' and ansible_facts.distribution_major_version | int < 7

- name: Define the PowerDNS Authoritative Server database MySQL schema file path on RedHat >= 7
  set_fact:
    _pdns_mysql_schema_file: "/usr/share/doc/pdns-backend-mysql-{{ _pdns_running_version | regex_replace('-rc[\\d]*$', '') }}/schema.mysql.sql"
  when: ansible_facts.os_family == 'RedHat' and ansible_facts.distribution_major_version | int >= 7

- name: Define the PowerDNS Authoritative Server database MySQL schema file path on Debian
  set_fact:
    _pdns_mysql_schema_file: "/usr/share/dbconfig-common/data/pdns-backend-mysql/install/mysql"
  when: ansible_facts.os_family == 'Debian' and pdns_install_repo == ''

- name: Define the PowerDNS Authoritative Server database MySQL schema file path on Debian
  set_fact:
    _pdns_mysql_schema_file: "/usr/share/doc/pdns-backend-mysql/schema.mysql.sql"
  when: ansible_facts.os_family == 'Debian' and pdns_install_repo != ''

- name: Import the PowerDNS Authoritative Server MySQL schema
  mysql_db:
    login_user: "{{ item['item']['value']['user'] }}"
    login_password: "{{ item['item']['value']['password'] }}"
    login_host: "{{ item['item']['value']['host'] }}"
    login_port: "{{ item['item']['port'] | default('3306') }}"
    name: "{{ item.item['value']['dbname'] }}"
    state: import
    target: "{{ _pdns_mysql_schema_file }}"
  when: "item['item']['key'].split(':')[0] == 'gmysql' and item['stdout'] == '0'"
  with_items: "{{ _pdns_check_mysql_db['results'] }}"