---
- name: add debian repository
  include_role:
    name: apt-repo/grafana

- name: generate apt pin file for grafana package
  when: grafana_version is defined
  copy:
    dest: "/etc/apt/preferences.d/grafana.pref"
    content: |
      Package: grafana
      Pin: version {{ grafana_version }}
      Pin-Priority: 1001

- name: remove apt pin file for grafana package
  when: grafana_version is not defined
  file:
    path: "/etc/apt/preferences.d/grafana.pref"
    state: absent

- name: install apt packages
  apt:
    name: "grafana{% if grafana_version is defined %}={{ grafana_version }}{% endif %}"
    state: present
    allow_downgrade: yes

- name: configure grafana server
  loop: "{{ grafana_config_server | dict2items }}"
  loop_control:
    label: "{{ item.key }}"
  ini_file:
    path: /etc/grafana/grafana.ini
    section: server
    option: "{{ item.key }}"
    value: "{{ item.value | string }}"
  notify: restart grafana

- name: configure grafana analytics
  loop: "{{ grafana_config_analytics | dict2items }}"
  loop_control:
    label: "{{ item.key }}"
  ini_file:
    path: /etc/grafana/grafana.ini
    section: analytics
    option: "{{ item.key }}"
    value: "{{ item.value | string }}"
  notify: restart grafana

- name: configure grafana security
  loop: "{{ grafana_config_security | dict2items }}"
  loop_control:
    label: "{{ item.key }}"
  ini_file:
    path: /etc/grafana/grafana.ini
    section: security
    option: "{{ item.key }}"
    value: "{{ item.value | string }}"
  notify: restart grafana

- name: configure grafana users
  loop: "{{ grafana_config_users | dict2items }}"
  loop_control:
    label: "{{ item.key }}"
  ini_file:
    path: /etc/grafana/grafana.ini
    section: users
    option: "{{ item.key }}"
    value: "{{ item.value | string }}"
  notify: restart grafana


- name: install datasources
  copy:
    dest: "/etc/grafana/provisioning/datasources/ansible.yml"
    content: |
      apiVersion: 1
      deleteDatasources: []
      {{ {'datasources': grafana_datasources} | to_nice_yaml(indent=2) }}
    group: grafana
    mode: 0640
  no_log: yes
  notify: restart grafana

- name: configure dashboard provisioning
  copy:
    dest: "/etc/grafana/provisioning/dashboards/ansible.yml"
    content: |
      apiVersion: 1
      providers:
      - name: ansible'
        folder: ''
        options:
          path: /var/lib/grafana/dashboards/ansible
          foldersFromFilesStructure: true
    group: grafana
    mode: 0640
  notify: restart grafana

- name: create directory for dashboards
  file:
    path: /var/lib/grafana/dashboards/ansible
    state: directory
    group: grafana
    mode: 0750

- name: install dashboards from file
  loop: "{{ grafana_dashboards | selectattr('file', 'defined') }}"
  loop_control:
    label: "{{ item.file }} -> {{ item.datasource }}"
  copy:
    content: "{{ lookup('file', 'dashboard-'+item.file+'.json') | regex_replace('\"(?:\\${)?DS_[A-Z0-9_-]+(?:})?\"', '\"'+item.datasource+'\"') }}\n"
    dest: "/var/lib/grafana/dashboards/ansible/{{ item.datasource }}_{{ item.file }}.json"
  register: grafana_dasboards_from_file

- name: install dashboards from content
  loop: "{{ grafana_dashboards | selectattr('content', 'defined') }}"
  loop_control:
    label: "{{ item.name }} -> {{ item.datasource }}"
  copy:
    content: "{{ item.content | regex_replace('\"(?:\\${)?DS_[A-Z0-9_-]+(?:})?\"', '\"'+item.datasource+'\"') }}\n"
    dest: "/var/lib/grafana/dashboards/ansible/{{ item.datasource }}_{{ item.name }}.json"
  register: grafana_dasboards_from_content

  ## TODO: implement this
- name: install dashboards from grafana.com
  loop: "{{ grafana_dashboards | selectattr('id', 'defined') }}"
  loop_control:
    label: "https://grafana.com/api/dashboards/{{ item.id }} -> {{ item.datasource }}"
  debug:
    msg: 'installing dashboards from grafana.com is not yet supported!'
  # register: grafana_dasboards_from_grafanacom

- name: fetch list of installed dashboards
  find:
    paths: /var/lib/grafana/dashboards/ansible
    patterns: "*.json"
  register: grafana_dashboards_installed

- name: remove superfluous dashboards
  loop: "{{ grafana_dashboards_installed.files | map(attribute='path') | difference(grafana_dasboards_from_file.results | map(attribute='dest')) | difference(grafana_dasboards_from_content.results | map(attribute='dest')) | list }}"
  file:
    path: "{{ item }}"
    state: absent

- name: make sure grafana-server is enabled and started
  systemd:
    name: grafana-server
    state: started
    enabled: yes

- name: manage grafana users
  include_tasks: users.yml