- name: Install 'postgresql' package
  package:
    name: postgresql
    state: present

- name: Install 'postgresql-client' package (debuntu)
  package:
    name: postgresql-client
    state: present
  when: is_debuntu

- name: Install 'postgresql-server' package (OS's other than debuntu)
  package:
    name: postgresql-server
    state: present
  when: not is_debuntu

- name: Install /etc/systemd/system/postgresql-iiab.service from template
  template:
    src: postgresql-iiab.service
    dest: /etc/systemd/system/postgresql-iiab.service
    # owner: root
    # group: root
    # mode: '0644'

- name: Create PostgreSQL data dir /library/pgsql-iiab, owned by postgres:postgres
  file:
    path: /library/pgsql-iiab
    owner: postgres
    group: postgres
    mode: '0700'
    state: directory

- name: Make sure locale {{ postgresql_locale }} is enabled (debuntu)    # en_US.UTF-8
  lineinfile:
    dest: /etc/locale.gen
    line: "{{ postgresql_locale }} UTF-8"
  when: is_debuntu

- name: Generate locales (debuntu)
  command: /usr/sbin/locale-gen
  when: is_debuntu

- name: Initialize the PostgreSQL db, creating /library/pgsql-iiab/pg_hba.conf (debuntu)
  #command: su - postgres -c "/usr/lib/postgresql/{{ postgresql_version }}/bin/initdb -E 'UTF-8' --locale={{ postgresql_locale }} -D /library/pgsql-iiab"
  command: /usr/lib/postgresql/{{ postgresql_version }}/bin/initdb -E 'UTF-8' --locale={{ postgresql_locale }} -D /library/pgsql-iiab
  args:
    creates: /library/pgsql-iiab/pg_hba.conf
  become: yes
  become_user: postgres
  when: is_debuntu

- name: Initialize the PostgreSQL db, creating /library/pgsql-iiab/pg_hba.conf (OS's other than debuntu)
  #command: su - postgres -c "/usr/bin/initdb -E 'UTF-8' --lc-collate={{ postgresql_locale }} --lc-ctype={{ postgresql_locale }} -D /library/pgsql-iiab"
  command: /usr/bin/initdb -E 'UTF-8' --lc-collate={{ postgresql_locale }} --lc-ctype={{ postgresql_locale }} -D /library/pgsql-iiab
  args:
    creates: /library/pgsql-iiab/pg_hba.conf
  become: yes
  become_user: postgres
  when: not is_debuntu

- name: Install /library/pgsql-iiab/postgresql.conf owned by postgres:postgres, from template
  template:
    backup: yes
    src: postgresql.conf.j2
    dest: /library/pgsql-iiab/postgresql.conf
    owner: postgres
    group: postgres
    mode: '0640'

- name: Disable & Stop stock 'postgresql' (parent) systemd service
  systemd:
    name: postgresql
    state: stopped
    enabled: no

# Above parent service postgresql.service uses template postgresql@.service to
# start/stop` child service e.g. postgresql@11-main.service on Debian 10, or
# postgresql@13-main.service on Debian 11. So these 2 stanzas dont do anything:

# 'systemctl is-enabled postgresql@' shows 'indirect' before + after
#- name: Disable stock 'postgresql@' (template) if real Debian
#  systemd:
#    name: postgresql@
#    #state: stopped    # Error if you attempt to stop template
#    enabled: no        # Doesn't do anything
#  when: is_debian and not is_raspbian

# 'systemctl is-enabled postgresql@13-main.service' shows 'enabled-runtime' before + after
#- name: Disable & Stop stock 'postgresql@{{ postgresql_version }}-main.service' (child service) if real Debian
#  systemd:
#    name: "postgresql@{{ postgresql_version }}-main.service"
#    state: stopped    # Already done by parent above
#    enabled: no       # Doesn't do anything
#  when: is_debian and not is_raspbian


# RECORD PostgreSQL AS INSTALLED

- name: "Set 'postgresql_installed: True'"
  set_fact:
    postgresql_installed: True

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