- name: install postgresql
  apt:
    name: "{{ item }}"
    state: present
    update_cache: yes
    cache_valid_time: 3600
  with_items:
      - postgresql
      - postgresql-contrib
      - python-psycopg2
      - ca-certificates

- name: generate mattermost DB password
  gen_passwd:
     length: 20
  register: new_password

- block:
    - name: create mattermost DB
      postgresql_db:
        name: mattermost
    - name: create mattermost DB user
      postgresql_user:
        name: mmuser
        password: "{{ new_password.passwd }}"
        db: mattermost
        priv: ALL
  become: true
  become_method: su
  become_user: postgres

- name: download latest mattermost
  get_url:
      url: "https://releases.mattermost.com/{{ mattermost_version }}/mattermost-team-{{ mattermost_version }}-linux-amd64.tar.gz"
      dest: "/opt/mattermost.tar.gz"
  register: new_download

- name: unpack mattermost
  unarchive:
    src: /opt/mattermost.tar.gz
    dest: /opt
    copy: no
  when: new_download.changed

- name: create mattermost data directory
  file:
    path: /opt/mattermost/data
    state: directory

- name: create mattermost group
  group:
    name: mattermost
    system: true

- name: create mattermost user and group
  user:
    name: mattermost
    group: mattermost
    system: true

- name: set mattermost directory permissions
  file:
      path: /opt/mattermost
      owner: mattermost
      group: mattermost
      mode: g+w
      recurse: true

- name: configure mattermost (driver name)
  json_file:
      path: /opt/mattermost/config/config.json
      key: "SqlSettings.DriverName"
      value: "postgres"

- name: configure mattermost (data source)
  json_file:
      path: /opt/mattermost/config/config.json
      key: "SqlSettings.DataSource"
      value: "postgres://mmuser:{{ new_password.passwd }}@127.0.0.1:5432/mattermost?sslmode=disable&connect_timeout=10"

- name: install mattermost systemd unit
  template:
      src: mattermost.service.j2
      dest: /etc/systemd/system/mattermost.service

- name: enable mattermost service
  service:
    name: mattermost
    enabled: yes
    state: started