---
- name: install requirements for postgresql
  apt:
    update_cache: yes
    state: "{% if cloud_update | bool %}latest{% else %}present{% endif %}"
    install_recommends: yes
    pkg:
      - apt-transport-https
      - ca-certificates
      - gnupg2
      - software-properties-common
      - curl

- name: setup PostgreSQL repository
  copy:
    content: "deb http://apt.postgresql.org/pub/repos/apt {{ ansible_lsb.codename }}-pgdg main"
    dest: "/etc/apt/sources.list.d/pgdg.list"

- name: setup PostgreSQL repository signing key
  apt_key: 
    url: https://www.postgresql.org/media/keys/ACCC4CF8.asc
    state: present

- name: install PostgreSQL packages
  apt:
    name: "{{ pkg }}"
    state: "{% if cloud_update | bool %}latest{% else %}present{% endif %}"
    install_recommends: yes
    update_cache: yes
  loop: 
    - "{{ postgresql_version }}"
  loop_control:
    loop_var: pkg
    label: "{{ pkg }}"

- name: adjust postgresql configuration
  lineinfile:
    path: "{{ postgresql_config_path }}/postgresql.conf"
    regexp: '^#?\s*{{ item.opt }}\s*='
    line: "{{ item.opt }} = '{{ item.val }}'"
    backrefs: yes
  loop:
    - opt: data_directory
      val: "{{ postgresql_data_directory }}"
    - opt: listen_addresses
      val: "{% if postgresql_listen_addr is not string and postgresql_listen_addr is iterable %}{{ postgresql_listen_addr | join(',') }}{% else %}{{ postgresql_listen_addr }}{% endif %}"
  loop_control:
    label: "{{ item.opt}} = '{{ item.val }}'"
  register: postgres_config_change

- name: adjust pg_hba.conf
  blockinfile:
    path: "{{ postgresql_config_path }}/pg_hba.conf"
    block: "{{ postgresql_pghba_network }}"
  register: postgres_config_change_pg_hba
  when: postgresql_pghba_network | length > 0

- name: setup datalocation
  file:
    state: directory
    path: "{{ postgresql_data_directory }}"
    owner: postgres
    group: postgres
    mode: 0750
  register: postgres_db_location

- name: setup new database cluster
  command:
    cmd: "pg_createcluster -d {{ postgresql_data_directory }} {{ postgresql_version_major }} {{ postgresql_cluster_name }}" 
    creates: "{{ postgresql_data_directory }}/base"
  when: postgres_db_location.changed and postgres_config_change.changed

- name: restart postgresql
  systemd:
    name: postgresql
    state: restarted
  when: postgres_config_change.changed or postgres_config_change_pg_hba.changed

- name: Setup databases based on PostgreSQL conf
  include_tasks: setup_db.yml
  loop: "{{ db_configs | json_query('[?type==`pgsql`]') }}"
  loop_control:
    loop_var: db
    label: "{% if 'dbname' in db %}{{ db.dbname }}{% elif 'dbuser' in db %}{{ db.dbuser }}{% else %}::pass_redacted::{% endif %}"