# TO DO:
# - Validate input vars mysql_install & mysql_enabled
# - Put ~12 stanzas just below into install.yml
#   - Triggered by... 'when: mysql_installed is undefined'
#   - Eliminate stale Fedora/CentOS code & gratuitous when: is_debuntu clauses?
# - Consider putting ~8 stanzas below that into enable.yml or similar?

- name: 'Install MySQL packages: mariadb-server, mariadb-client, and 8 php packages (debuntu)'
  package:
    name:
      - mariadb-server
      - mariadb-client
      - php{{ php_version }}
      - php{{ php_version }}-mysql
      - php-pear
      - php{{ php_version }}-gd
      - php{{ php_version }}-imap
      - php{{ php_version }}-ldap
      - php{{ php_version }}-odbc
      #- php{{ php_version }}-xml
      - php{{ php_version }}-xmlrpc
    state: present
  when: is_debuntu | bool

- name: Install package 'php{{ php_version }}-xml' (debuntu)    # WAS: (ubuntu or debian 9+)
  package:
    name: "php{{ php_version }}-xml"
    state: present
  when: is_debuntu | bool
  #when: is_ubuntu or (is_debian and not is_debian_8)

#- name: Install php-xml-parser (debian-8)
#  package:
#    name: php-xml-parser
#    state: present
#  when: is_debian_8 | bool

- name: "Install packages: mysql, MySQL-python and 9 php packages (OS's other than debuntu)"
  package:
    name:
      - MySQL-python
      - mysql
      - php
      - php-mysql
      - php-pear
      - php-gd
      - php-imap
      - php-ldap
      - php-odbc
      - php-xml
      - php-xmlrpc
    state: present
  when: not is_debuntu

- include_tasks: centos.yml
  when: ansible_distribution == "CentOS"

- include_tasks: fedora.yml
  when: ansible_distribution == "Fedora"


# 2019-07-03 @jvonau @holta: the next 50 lines (6 stanzas) double MariaDB's
# default boot timeout (90s to 180s) for slow CPUs like this Ubuntu 18.04.2 VM:
# https://github.com/iiab/iiab/issues/1802
# https://mariadb.com/kb/en/library/what-to-do-if-mariadb-doesnt-start/#systemd

- name: Check if /lib/systemd/system/mariadb.service exists
  stat:
    path: /lib/systemd/system/mariadb.service
  register: mariadb_unit_file

- name: Copy pkg's /lib/systemd/system/mariadb.service to /etc/systemd/system/ to be customized (CREATES TIMESTAMPED BACKUPS OF /etc/systemd/system/mariadb.service e.g. IF OPERATOR CUSTOMIZED IT, EVEN DESPITE WARNING BELOW!)
  copy:
    force: yes
    backup: yes
    src: /lib/systemd/system/mariadb.service
    dest: /etc/systemd/system/
  when: mariadb_unit_file.stat.exists

- name: Symlink /etc/systemd/system/mysql.service -> /etc/systemd/system/mariadb.service
  file:
    state: link
    force: yes
    src: /etc/systemd/system/mariadb.service
    path: /etc/systemd/system/mysql.service
  when: mariadb_unit_file.stat.exists

- name: Symlink /etc/systemd/system/mysqld.service -> /etc/systemd/system/mariadb.service
  file:
    state: link
    force: yes
    src: /etc/systemd/system/mariadb.service
    path: /etc/systemd/system/mysqld.service
  when: mariadb_unit_file.stat.exists

- name: "WARN OPERATOR: Changes made to /etc/systemd/system/mariadb.service WILL BE LOST whenever 'mysql' playbook is run"
  lineinfile:
    path: /etc/systemd/system/mariadb.service
    insertbefore: BOF    # Beginning of file
    line: "# WARNING: CHANGES TO THIS FILE WILL BE REGULARLY *OVERWRITTEN* BY:\n# /opt/iiab/iiab/roles/mysql/tasks/main.yml\n"
  when: mariadb_unit_file.stat.exists

- name: Set systemd boot timeout to 180 seconds for slow machines, in /etc/systemd/system/mariadb.service
  lineinfile:
    path: /etc/systemd/system/mariadb.service
    insertafter: '^\[Service\]$'
    regexp: "^TimeoutStartSec="
    line: "\n# 2019-07-03: @jvonau @holta doubled MariaDB's default boot timeout, from\n# 90 seconds to 180 seconds, for slow machines like this Ubuntu 18.04.2 VM:\n# https://github.com/iiab/iiab/issues/1802\n# https://mariadb.com/kb/en/library/what-to-do-if-mariadb-doesnt-start/#systemd\nTimeoutStartSec=180\n"
    # If the line above were to be run repeatedly (never happens here!) Ansible
    # would pollute MariaDB's systemd unit file.  As multi-line regexp's are
    # not allowed (both regexp's should match, for idempotency).  If nec, use
    # the 1-liner below, or Ansible's 'blockinfile' which pollutes config files
    # in its own way...surrounding blocks with marker lines.
    # line: "TimeoutStartSec=180"
  when: mariadb_unit_file.stat.exists

- name: "Add 'mysql_installed: True' to {{ iiab_state_file }}"
  lineinfile:
    dest: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
    regexp: '^mysql_installed'
    line: 'mysql_installed: True'


# Name of MySQL service varies by OS, so hardcoded in /opt/iiab/iiab/vars/<OS>.yml (formerly in roles/0-init/tasks/main.yml)
- name: Enable & Start MySQL systemd service ({{ mysql_service }}) if mysql_enabled
  systemd:
    name: "{{ mysql_service }}"
    daemon_reload: yes
    state: restarted
    enabled: yes
  when: mysql_enabled | bool

- name: Install /root/.my.cnf file from template, with root password credentials, if mysql_enabled
  template:
    src: my.cnf.j2
    dest: /root/.my.cnf
    owner: root
    mode: '0600'
  when: mysql_enabled | bool

# 'localhost' needs to be the last item for idempotency, see
# http://ansible.cc/docs/modules.html#mysql-user
# unfortunately it still doesn't work
- name: Update MySQL root password for localhost root accounts, if mysql_enabled
  mysql_user:
    name: root
    host: localhost
    password: "{{ mysql_root_password }}"
    priv: "*.*:ALL,GRANT"
  when: mysql_enabled | bool

- name: Update MySQL root password for all remaining root accounts (127.0.0.1, ::1) if mysql_enabled
  mysql_user:
    name: root
    host: "{{ item }}"
    password: "{{ mysql_root_password }}"
    priv: "*.*:ALL,GRANT"
  with_items:
    #- "{{ iiab_hostname }}.{{ iiab_domain }}"
    - 127.0.0.1
    - ::1
  when: mysql_enabled | bool

- name: Delete anonymous MySQL server user for {{ ansible_hostname }}, if mysql_enabled
  mysql_user:
    user: ""
    host: "{{ ansible_hostname }}"
    state: absent
  when: mysql_enabled | bool

- name: Delete anonymous MySQL server user for localhost, if mysql_enabled
  mysql_user:
    user: ""
    state: absent
  when: mysql_enabled | bool

- name: Remove the MySQL 'test' database, if mysql_enabled
  mysql_db:
    db: test
    state: absent
  when: mysql_enabled | bool

# we had to start mysql in order to configure it, now turn if off if not enabled
- name: Config is done but now DISABLE MySQL service, if not mysql_enabled
  systemd:
    name: "{{ mysql_service }}"
    enabled: no
    state: stopped
  when: not mysql_enabled


- name: Add 'mysql' variable values to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"
    section: mysql
    option: "{{ item.option }}"
    value: "{{ item.value | string }}"
  with_items:
    - option: name
      value: MySQL
    - option: description
      value: '"MySQL is a widely used free and open source (GPLv2) database, offered by most web hosting services, on a diversity of platforms."'
    - option: enabled
      value: "{{ mysql_enabled }}"