# 1. CREATE/VERIFY CRITICAL DIRECTORIES & FILES ARE IN PLACE

- name: Create various directories for Kiwix's ZIM files
  file:
    path: "{{ item }}"
    owner: root
    group: root
    mode: 0755
    state: directory
  with_items:
  - "{{ iiab_zim_path }}"
  - "{{ iiab_zim_path }}/content"
  - "{{ iiab_zim_path }}/index"

- name: Check for /library/zims/library.xml
  stat:
    path: "{{ kiwix_library_xml }}"
  register: kiwix_xml

- name: Place a stub /library/zims/library.xml if file does not exist
  template:
    src: "{{ item }}"
    dest: "{{ kiwix_library_xml }}"
    mode: 0644
    owner: root
    group: root
    force: no
  with_items:
  - library.xml
  when: not kiwix_xml.stat.exists

- name: Check for /opt/iiab/kiwix/bin/kiwix-serve binary
  stat:
    path: "{{ iiab_base }}/kiwix/bin/kiwix-serve"
  register: kiwix_bin

- name: Set kiwix_first_pass if kiwix-serve not found
  set_fact:
    kiwix_first_pass: True
  when: kiwix_bin.stat.exists is defined and not kiwix_bin.stat.exists

- name: Copy test.zim file if 1st pass
  copy:
    src: test.zim
    dest: "{{ iiab_zim_path }}/content/test.zim"
    mode: 0644
    owner: root
    group: root
    force: no
  when: kiwix_first_pass

- name: Create /opt/iiab/kiwix/bin directory
  file:
    path: "{{ iiab_base }}/kiwix/bin"
    owner: root
    group: root
    mode: 0755
    state: directory

# 2. INSTALL KIWIX-TOOLS EXECUTABLES IF 1ST PASS: we get a whole web server for i686 but only the kiwix execs for linux64 & armhf

- name: Unarchive Kiwix to permanent location if 1st pass (bin_only, i.e. not i686)
  unarchive:
    src: "{{ downloads_dir }}/{{ kiwix_src_file }}"
    dest: "{{ iiab_base }}/kiwix/bin"
    owner: root
    group: root
  when: kiwix_src_bin_only and kiwix_first_pass

# EXPERIMENTAL i686 CODE PATH: as of Nov 2017 bunzip2 then untar unpacks
# to /tmp/kiwix-0.10-i686/bin WHOSE CONTENTS NEEDS TO BE MOVED TO
# /opt/iiab/kiwix/bin (STANZA FURTHER BELOW).  All i686 code needs testing.
# ALSO: code below may need to be revived to chown -R root:root & chmod
- name: Unarchive kiwix-*-linux-i686.tar.bz2 to /tmp if 1st pass (not bin_only, i.e. i686)
  unarchive:
    src: "{{ downloads_dir }}/{{ kiwix_src_file }}"
    dest: /tmp
    # dest: "{{ iiab_base }}"
    owner: root
    group: root
  when: not kiwix_src_bin_only and kiwix_first_pass

# EXPERIMENTAL i686 CODE PATH
- name: Move /tmp/kiwix*i686/bin/* to permanent location /opt/iiab/kiwix/bin if 1st pass (not bin_only, i.e. i686)
  shell: "mv /tmp/kiwix*i686/bin/* /opt/iiab/kiwix/bin/"
  when: not kiwix_src_bin_only and kiwix_first_pass

# MIGHT BE RESTORED LATER FOR i686?  Unused as of Nov 2017:
# # workaround because unarchive does not set ownership properly
# - name: "Set ownership as if: 'chown -R root:root /opt/iiab/kiwix'"
#   file:
#     path: "{{ iiab_base }}/kiwix"
#     owner: root
#     group: root
#     recurse: yes
#     mode: ????

# 3. ENABLE MODS FOR APACHE PROXY IF DEBUNTU

- name: Enable the mods which permit Apache to proxy (debuntu)
  apache2_module:
    name: "{{ item }}"
  with_items:
  - proxy
  - proxy_html
  - proxy_http
  - rewrite
  when: is_debuntu

# 4. CREATE/ENABLE/DISABLE KIWIX SERVICE & ITS CRON JOB

- name: Create 'kiwix-serve' service
  template:
    backup: no
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
    owner: root
    group: root
    mode: "{{ item.mode }}"
  with_items:
  - { src: 'kiwix-serve.service.j2', dest: '/etc/systemd/system/kiwix-serve.service', mode: '0644'}
#   - { src: 'kiwix-serve-init.j2', dest: '/usr/libexec/kiwix-serve-init', mode: '0755'}
  - { src: 'iiab-make-kiwix-lib', dest: '/usr/bin/iiab-make-kiwix-lib', mode: '0755'}
  - { src: 'iiab-make-kiwix-lib.py', dest: '/usr/bin/iiab-make-kiwix-lib.py', mode: '0755'}
  - { src: 'iiab-make-apache-config.py', dest: '/usr/bin/iiab-make-apache-config.py', mode: '0755'}

- name: Disable 'kiwix-serve' service
  service:
    name: kiwix-serve
    enabled: no
    state: stopped
  when: not kiwix_enabled

- name: Enable 'kiwix-serve' service
  service:
    name: kiwix-serve
    enabled: yes
    state: restarted
  when: kiwix_enabled

# In the past kiwix-serve did not stay running, so we'd been doing this hourly.
# @mgautierfr & others suggest kiwix-serve might be auto-restarted w/o cron in
# future, whenever service fails, if this really catches all cases?
# https://github.com/iiab/iiab/issues/484#issuecomment-342151726
- name: Make a crontab entry to restart kiwix-serve at 4AM (debuntu)
  lineinfile:
         # mn hr dy mo day-of-week[Sunday=0] username command-to-be-executed
    line: "0  4  *  *  * root /bin/systemctl restart kiwix-serve.service"
    dest: /etc/crontab
  when: kiwix_enabled and is_debuntu

- name: Make a crontab entry to restart kiwix-serve at 4AM (redhat)
# *  *  *  *  * user-name  command to be executed
  lineinfile:
         # mn hr dy mo day-of-week[Sunday=0] username command-to-be-executed
    line: "0  4  *  *  * root /usr/bin/systemctl restart kiwix-serve.service"
    dest: /etc/crontab
  when: kiwix_enabled and is_redhat

# 5. FINALIZE

- name: Add 'kiwix-serve' to list of services at /etc/iiab/iiab.ini
  ini_file:
    dest: "{{ service_filelist }}"
    section: kiwix-serve
    option: "{{ item.option }}"
    value: "{{ item.value }}"
  with_items:
  - option: name
    value: kiwix-serve
  - option: description
    value: '"Part of https://github.com/kiwix/kiwix-tools/ - kiwix-serve is the most used web server for ZIM files."'
# The following 4 lines are unused as of Nov 2017:
#   - option: kiwix_url
#     value: "{{ kiwix_url }}"
#   - option: kiwix_path
#     value: "{{ kiwix_path }}"
  - option: kiwix_port
    value: "{{ kiwix_port }}"
  - option: iiab_zim_path
    value: "{{ iiab_zim_path }}"
  - option: kiwix_library_xml
    value: "{{ kiwix_library_xml }}"
# The following 2 lines are unused as of Nov 2017:
#   - option: kiwix_content_path
#     value: "{{ kiwix_content_path }}"
  - option: enabled
    value: "{{ kiwix_enabled }}"