---
# Role: postgresql
# Installiert und konfiguriert PostgreSQL 16 auf DBS01
# Daten werden vom Default-Cluster nach {{ postgresql_data_dir }} verschoben

- name: "de_DE.UTF-8 Locale generieren"
  locale_gen:
    name: de_DE.UTF-8
    state: present

- name: "rsync installieren (für Datenmigration)"
  apt:
    name: rsync
    state: present

- name: "PostgreSQL GPG Key hinzufügen"
  apt_key:
    url: https://www.postgresql.org/media/keys/ACCC4CF8.asc
    state: present

- name: "PostgreSQL Repository hinzufügen"
  apt_repository:
    repo: "deb http://apt.postgresql.org/pub/repos/apt {{ ansible_distribution_release }}-pgdg main"
    state: present
    filename: pgdg

- name: "PostgreSQL {{ postgresql_version }} installieren"
  apt:
    name:
      - "postgresql-{{ postgresql_version }}"
      - "postgresql-client-{{ postgresql_version }}"
      - "postgresql-contrib-{{ postgresql_version }}"
      - python3-psycopg2
    state: present
    update_cache: true

- name: "Prüfen ob Data-Dir bereits PostgreSQL-Daten enthält"
  stat:
    path: "{{ postgresql_data_dir }}/PG_VERSION"
  register: pg_data_exists

- name: "PostgreSQL Service stoppen (für Datenmigration in /data)"
  service:
    name: "postgresql@{{ postgresql_version }}-main"
    state: stopped
  when:
    - postgresql_data_dir != '/var/lib/postgresql/' ~ postgresql_version ~ '/main'
    - not pg_data_exists.stat.exists

- name: "PostgreSQL Data-Verzeichnis anlegen"
  file:
    path: "{{ postgresql_data_dir }}"
    state: directory
    owner: postgres
    group: postgres
    mode: '0700'
  when:
    - postgresql_data_dir != '/var/lib/postgresql/' ~ postgresql_version ~ '/main'
    - not pg_data_exists.stat.exists

- name: "PostgreSQL Default-Cluster nach {{ postgresql_data_dir }} kopieren"
  command: >
    rsync -a --delete
    /var/lib/postgresql/{{ postgresql_version }}/main/
    {{ postgresql_data_dir }}/
  when:
    - postgresql_data_dir != '/var/lib/postgresql/' ~ postgresql_version ~ '/main'
    - not pg_data_exists.stat.exists

- name: "Berechtigungen auf Data-Dir sicherstellen"
  file:
    path: "{{ postgresql_data_dir }}"
    owner: postgres
    group: postgres
    mode: '0700'
  when: postgresql_data_dir != '/var/lib/postgresql/' ~ postgresql_version ~ '/main'

- name: "postgresql.conf konfigurieren (inkl. data_directory)"
  template:
    src: postgresql.conf.j2
    dest: "/etc/postgresql/{{ postgresql_version }}/main/postgresql.conf"
    owner: postgres
    group: postgres
    mode: '0644'
  notify: restart postgresql

- name: "pg_hba.conf konfigurieren"
  template:
    src: pg_hba.conf.j2
    dest: "/etc/postgresql/{{ postgresql_version }}/main/pg_hba.conf"
    owner: postgres
    group: postgres
    mode: '0640'
  notify: reload postgresql

- name: "PostgreSQL Service aktivieren und starten"
  service:
    name: "postgresql@{{ postgresql_version }}-main"
    state: started
    enabled: true

- name: "Warten bis PostgreSQL bereit ist"
  wait_for:
    host: localhost
    port: "{{ postgresql_port | default(5432) }}"
    timeout: 30

- name: "PostgreSQL INSIGHT Datenbanken anlegen"
  become_user: postgres
  postgresql_db:
    name: "{{ item }}"
    encoding: UTF8
    lc_collate: de_DE.UTF-8
    lc_ctype: de_DE.UTF-8
    template: template0
    state: present
  loop: "{{ postgresql_databases }}"
  when: postgresql_databases is defined

- name: "PostgreSQL INSIGHT User anlegen"
  become_user: postgres
  postgresql_user:
    name: "{{ item.name }}"
    password: "{{ item.password }}"
    role_attr_flags: "{{ item.role_attr_flags | default('LOGIN') }}"
    state: present
  loop: "{{ postgresql_users }}"
  when: postgresql_users is defined
  no_log: true

- name: "PostgreSQL Datenbankberechtigungen setzen"
  become_user: postgres
  postgresql_privs:
    db: "{{ item.db }}"
    role: "{{ item.role }}"
    privs: "{{ item.privs }}"
    type: database
    state: present
  loop: "{{ postgresql_grants }}"
  when: postgresql_grants is defined

- name: "PostgreSQL Version ausgeben"
  become_user: postgres
  command: psql --version
  register: pg_version
  changed_when: false

- name: "PostgreSQL bereit"
  debug:
    msg: "{{ pg_version.stdout }} — Data-Dir: {{ postgresql_data_dir }}"