- name: set pg_cfg
  set_fact:
    pg_cfg: "{{ postgresql_default_config | d({}) |
      combine(postgresql_config | d({}), recursive=true) }}"


- name: install dependencies
  include_tasks: tasks/install_packages.yml
  vars:
    package:
      - postgresql
      - postgresql-contrib
      - py3-psycopg2


- name: create user and group
  include_tasks: tasks/create_user.yml
  vars:
    user:
      name: "{{ postgresql_user }}"
      group: "{{ postgresql_group }}"


- name: create config directory
  file:
    path: "{{ postgresql_conf_dir }}"
    state: directory
    mode: 0770
    owner: "{{ postgresql_user }}"
    group: "{{ postgresql_group }}"


- block:
    - name: create data directory
      file:
        path: "{{ postgresql_data_dir }}"
        state: directory
        mode: 0700
        owner: "{{ postgresql_user }}"
        group: "{{ postgresql_group }}"
  rescue:
    - meta: noop


- name: include custom config in default postgres config
  lineinfile:
    path: "{{ postgresql_conf_dir }}/postgresql.conf"
    line: "include 'custom.conf'"
    create: yes
    mode: 0400
    owner: "{{ postgresql_user }}"
    group: "{{ postgresql_group }}"
  notify: restart postgresql


- name: template custom config
  template:
    src: postgresql.j2
    dest: "{{ postgresql_conf_dir }}/custom.conf"
    force: yes
    mode: 0400
    owner: "{{ postgresql_user }}"
    group: "{{ postgresql_group }}"
    lstrip_blocks: yes
  notify: restart postgresql
  vars:
    config: "{{ pg_cfg }}"


- name: template pg_hba.conf if it does not exist
  template:
    src: pg_hba.j2
    dest: "{{ postgresql_conf_dir }}/pg_hba.conf"
    force: no
    mode: 0400
    owner: "{{ postgresql_user }}"
    group: "{{ postgresql_group }}"
  notify: restart postgresql


- name: ensure postgres hba allows local connections
  community.postgresql.postgresql_pg_hba:
    dest: "{{ postgresql_conf_dir }}/pg_hba.conf"
    contype: local
    databases: all
    users: all
    method: trust
  notify: restart postgresql


- name: edit service config
  lineinfile:
    path: /etc/conf.d/postgresql
    regexp: "^{{ item.name }}="
    line: '{{ item.name }}="{{ item.value }}"'
  notify: restart postgresql
  loop:
    - name: conf_dir
      value: "{{ postgresql_conf_dir }}"
    - name: data_dir
      value: "{{ postgresql_data_dir }}"
    - name: pg_opts
      value: -c log_destination='syslog'
    - name: initdb_opts
      value: --locale=en_US.UTF-8


- name: disable logfile in service config
  lineinfile:
    path: /etc/conf.d/postgresql
    regexp: '^logfile=(.*)$'
    line: '#logfile=\1'
    backrefs: yes
  notify: restart postgresql


- name: collect .new files
  find:
    paths: "{{ postgresql_conf_dir }}"
    patterns: "*.new"
  register: new_files


- name: remove .new files
  file:
    path: "{{ item.path }}"
    state: absent
  loop: "{{ new_files.files | flatten(levels=1) }}"


- name: remove old postgres log file
  file:
    path: /var/log/postgresql/postmaster.log
    state: absent
  changed_when: no


- name: flush handlers
  meta: flush_handlers


# TODO: backup configuration for postgres


- name: enable and start postgres
  service:
    name: postgresql
    state: started
    enabled: yes
  environment:
    LANG: 'en_US.UTF-8'