# TO DO: (2020-02-13)
# - Look at analogous NGINX logic for http://box/usb in
#   nginx/templates/iiab.conf.j2 and make that visually meaningful for teachers:
# https://github.com/iiab/iiab/blob/master/roles/nginx/templates/iiab.conf.j2#L5-L8


# "How do i fail a task in Ansible if the variable contains a boolean value?
# I want to perform input validation for Ansible playbooks"
# https://stackoverflow.com/questions/46664127/how-do-i-fail-a-task-in-ansible-if-the-variable-contains-a-boolean-value-i-want/46667499#46667499

# We assume 0-init/tasks/validate_vars.yml has DEFINITELY been run, so no need
# to re-check whether vars are defined here.  As Ansible vars cannot be unset:
# https://serverfault.com/questions/856729/how-to-destroy-delete-unset-a-variable-value-in-ansible

- name: Assert that "usb_lib_install is sameas true" (boolean not string etc)
  assert:
    that: usb_lib_install is sameas true
    fail_msg: "PLEASE SET 'usb_lib_install: True' e.g. IN: /etc/iiab/local_vars.yml"
    quiet: yes

- name: Assert that "usb_lib_enabled | type_debug == 'bool'" (boolean not string etc)
  assert:
    that: usb_lib_enabled | type_debug == 'bool'
    fail_msg: "PLEASE GIVE VARIABLE 'usb_lib_enabled' A PROPER (UNQUOTED) ANSIBLE BOOLEAN VALUE e.g. IN: /etc/iiab/local_vars.yml"
    quiet: yes


- name: Install USB_LIB if 'usb_lib_installed' not defined, e.g. in {{ iiab_state_file }}    # /etc/iiab/iiab_state.yml
  include_tasks: install.yml
  when: usb_lib_installed is undefined


# If setup.yml becomes the norm in future, put the 2-3 stanzas below in there:

- name: "Set 'umask=0000' for {VFAT/FAT32, NTFS, exFAT} using var FS_MOUNTOPTIONS in /etc/usbmount/usbmount.conf, so Kolibri exports work"
  lineinfile:
    regexp: '^FS_MOUNTOPTIONS=.*'
    line: 'FS_MOUNTOPTIONS="-fstype=vfat,umask=0000 -fstype=ntfs,umask=0000 -fstype=exfat,umask=0000"'
    path: /etc/usbmount/usbmount.conf
  when: usb_lib_umask0000_for_kolibri

# Setting 'umask=0000' for all filesystems: (much the same thing as above, as
# the mount command does not use this umask setting for filesystems like ext4)
#- name: "Add ',umask=0000' to MOUNTOPTIONS var in /etc/usbmount/usbmount.conf, so Kolibri exports work"
#  lineinfile:
#    regexp: '^MOUNTOPTIONS=.*'
#    line: 'MOUNTOPTIONS="sync,noexec,nodev,noatime,nodiratime,umask=0000"'
#    path: /etc/usbmount/usbmount.conf
#  when: usb_lib_umask0000_for_kolibri

- name: 'Set FS_MOUNTOPTIONS="" in /etc/usbmount/usbmount.conf, e.g. if Kolibri will not be used'
  lineinfile:
    regexp: '^FS_MOUNTOPTIONS=.*'
    line: 'FS_MOUNTOPTIONS=""'    # Restore apt pkg default, e.g. for runrole
    path: /etc/usbmount/usbmount.conf
  when: not usb_lib_umask0000_for_kolibri


- name: Enable/Disable/Restart NGINX
  include_tasks: nginx.yml


# 2021-04-29: Clean up here to catch the already installed users, remove for the next release (PR #2760)
- name: Remove /etc/usbmount/mount.d/00_create_model_symlink
  file:
    path: /etc/usbmount/mount.d/00_create_model_symlink
    state: absent

- name: Put variable in iiab.env that enables display of content at root of USB
  lineinfile:
    path: "{{ iiab_env_file }}"
    regexp: "^IIAB_USB_LIB_SHOW_ALL.*"
    line: "IIAB_USB_LIB_SHOW_ALL={{ iiab_usb_lib_show_all }}"


- name: Add 'usb_lib' variable values to {{ iiab_ini_file }}
  ini_file:
    path: "{{ iiab_ini_file }}"    # /etc/iiab/iiab.ini
    section: usb_lib
    option: "{{ item.option }}"
    value: "{{ item.value | string }}"
  with_items:
    - option: name
      value: USB_LIB
    - option: description
      value: '"USB_LIB automounts Teacher Content on USB drives to /library/www/html/local_content, so students can browse it almost immediately at http://box/usb"'
    - option: usb_lib_install
      value: "{{ usb_lib_install }}"
    - option: usb_lib_enabled
      value: "{{ usb_lib_enabled }}"
    - option: usb_lib_umask0000_for_kolibri
      value: "{{ usb_lib_umask0000_for_kolibri }}"