# MongoDB Install Docs:
# https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/
# https://www.mongodb.com/docs/manual/installation/


# 1. INSTALL MongoDB PACKAGES AND/OR BINARIES

# 2019-02-02: Sugarizer with Node.js 10.x requires MongoDB 2.6+ so
# https://andyfelong.com/2017/08/mongodb-3-0-14-for-raspbian-stretch/ is
# being used on Raspbian, all I found! (Raspbian's apt pkg is MongoDB 2.4.14)
#
# mongodb_stretch_3_0_14_core.zip (20M) & mongodb_stretch_3_0_14_tools.zip (15M)
# were backed up from andyfelong.com to https://download.iiab.io/packages/
#
# CLARIF: mongodb_stretch_3_0_14_core.zip IS IN FACT 3.0.14 (core) BUT...
#         mongodb_stretch_3_0_14_tools.zip IS REALLY 3.0.15 (tools)

- block:
  - name: Create dir /tmp/mongodb-3.0.1x (aarch32)
    file:
      path: /tmp/mongodb-3.0.1x
      state: directory

  - name: Download & unzip 20MB https://download.iiab.io/packages/mongodb_stretch_3_0_14_core.zip to /tmp/mongodb-3.0.1x (aarch32)
    unarchive:
      remote_src: yes
      src: "{{ iiab_download_url }}/mongodb_stretch_3_0_14_core.zip"    # https://download.iiab.io/packages
      dest: /tmp/mongodb-3.0.1x

  - name: Install (move) its 3 CORE binaries from /tmp/mongodb-3.0.1x/core to /usr/bin (aarch32)
    shell: mv /tmp/mongodb-3.0.1x/core/* /usr/bin

  - name: Download & unzip 15MB https://download.iiab.io/packages/mongodb_stretch_3_0_14_tools.zip [IN FACT THIS ONE'S 3.0.15] to /tmp/mongodb-3.0.1x (aarch32)
    unarchive:
      remote_src: yes
      src: "{{ iiab_download_url }}/mongodb_stretch_3_0_14_tools.zip"
      dest: /tmp/mongodb-3.0.1x

  - name: Install (move) its 9 TOOLS binaries from /opt/iiab/downloads/mongodb-3.0.1x/tools to /usr/bin (aarch32)
    shell: mv /tmp/mongodb-3.0.1x/tools/* /usr/bin

  - name: Create Linux group mongodb (aarch32)
    group:
      name: mongodb
      state: present

  - name: Create Linux user mongodb (aarch32)
    user:
      name: mongodb
      group: mongodb    # primary group
      groups: mongodb
      home: /var/lib/mongodb
      shell: /usr/sbin/nologin

  - name: Install {{ mongodb_conf }} from template (aarch32)
    template:
      src: mongod.conf.j2
      dest: "{{ mongodb_conf }}"    # /etc/mongod.conf

  - name: 'Create 2 dirs: /var/lib/mongodb, /var/log/mongodb (mongodb:mongodb)'
    file:
      state: directory
      path: "{{ item }}"
      owner: mongodb
      group: mongodb
    with_items:
      - /var/lib/mongodb
      - /var/log/mongodb

  # end block
  when: not (ansible_architecture == "x86_64" or ansible_architecture == "aarch64")

# 32-bit OS's are handled above: this should handle aarch32 including 32-bit
# Ubuntu from https://ubuntu.com/download/raspberry-pi but Ubuntu 20.04+ and
# 22.04+ 32-bit might fail untested, and 32-bit Intel might puke as this was
# orginally deployed for Raspbian.  (Haven't seen bootable 32-bit Intel
# installers for a while now.)  64-bit OS's proceed below.

- block:
  - name: Add mongodb.org signing key (only 64-bit support available) for MongoDB version {{ mongodb_64bit_version }}
    shell: wget -qO - https://www.mongodb.org/static/pgp/server-{{ mongodb_64bit_version }}.asc | apt-key add -
    #shell: wget -qO - https://pgp.mongodb.com/server-{{ mongodb_64bit_version }}.asc | apt-key add -
    args:
      warn: false

  - name: Install mongodb-org's Debian bullseye source/repo (we only use x86_64 i.e. arm64) for MongoDB version {{ mongodb_64bit_version }}
    apt_repository:
      # 2020-10-28 and 2022-06-09: https://repo.mongodb.org/apt/debian/dists/
      # supports only {Buster 10, Stretch 9, Jessie 8, Wheezy 7}.  So Bullseye
      # 11 and Bookworm 12 (testing branch) revert to buster for now:
      # 2022-09-27: Changed from 'buster' to 'bullseye' (i.e. Debian 11) as
      # this was recently added to https://repo.mongodb.org/apt/debian/dists/
      repo: deb https://repo.mongodb.org/apt/debian bullseye/mongodb-org/{{ mongodb_64bit_version }} main
      #repo: deb https://repo.mongodb.org/apt/debian {{ ansible_distribution_release }}/mongodb-org/4.4 main
      state: present
      filename: mongodb-org
    when: is_debian and ansible_architecture == "x86_64"

  # 2022-09-27: Soon to change from 'focal' to 'jammy'
  - name: Otherwise install mongodb-org's Ubuntu focal source/repo [ arch=amd64,arm64 ] for MongoDB version {{ mongodb_64bit_version }}
    apt_repository:
      repo: deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/{{ mongodb_64bit_version }} multiverse
      state: present
      filename: mongodb-org
    when: not (is_debian and ansible_architecture == "x86_64")

  # # Debian 10 aarch64 might work below but is blocked in main.yml
  # - name: Use mongodb-org's Ubuntu focal repo for RasPiOS-aarch64
  #   apt_repository:
  #     repo: deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse
  #     state: present
  #     filename: mongodb-org
  #   when: is_raspbian and ansible_architecture == "aarch64"

  # - name: Use mongodb-org's Ubuntu focal repo for Linux Mint - 64bit only
  #   apt_repository:
  #     repo: deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse
  #     state: present
  #     filename: mongodb-org
  #   when: is_linuxmint

  # - name: Use mongodb-org's Ubuntu repo for all non-Mint Ubuntu - 64bit only
  #   apt_repository:
  #     # 2020-10-27: https://repo.mongodb.org/apt/ubuntu/dists/ supports only
  #     # {focal 20.04, bionic 18.04, xenial 16.04, trusty 14.04, precise 12.04}
  #     # so other Ubuntu's like groovy 20.10 need to revert to recent LTS repo:
  #     repo: deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse
  #     #repo: deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu {{ ansible_distribution_release }}/mongodb-org/4.4 multiverse
  #     state: present
  #     filename: mongodb-org
  #   when: is_ubuntu and not is_linuxmint

  - name: "Install packages: mongodb-org, mongodb-org-server"
    package:
      name:
        - mongodb-org    # Meta-package that's auto-installed anyway (SO PROB UNNEC HERE?)
        - mongodb-org-server
      state: present

  - name: Establish {{ mongodb_conf }} dbPath {{ mongodb_db_path }} -- instead of /var/lib/mongodb default -- takes effect on next (re)start of mongodb.service -- via enable-or-disable.yml or via sugarizer.service auto-starting MongoDB on demand
    lineinfile:
      path: "{{ mongodb_conf }}"
      regexp: '^\s*dbPath:'    # \s = any whitespace char. stackoverflow.com/a/38491899
      line: "  dbPath: {{ mongodb_db_path }}"    # /library/dbdata/mongodb

  # GRATUITOUS (port 27017 is already the default)
  - name: Establish {{ mongodb_conf }} port {{ mongodb_port }} -- takes effect on next (re)start of mongodb.service -- via enable-or-disable.yml or via sugarizer.service auto-starting MongoDB on demand
    lineinfile:
      path: "{{ mongodb_conf }}"
      regexp: '^\s*port:'
      line: "  port: {{ mongodb_port }}"    # 27017

  # 2022-06-07 #3236 MongoDB 5.0.9 "Illegal instruction" on RPi 4...
  # https://www.mongodb.com/community/forums/t/core-dump-on-mongodb-5-0-on-rpi-4/115291/14
  # ...as ARM v8-A < ARM v8.2-A ...also reveals:
  #
  # (1) For Intel x86_64, MongoDB 5.x requires Sandy Bridge or later.
  #     For AMD x86_64, MongoDB 5.x requires Bulldozer or later.
  #     Roughly speaking, this means post-2011 CPUs with AVX instructions:
  #     https://github.com/docker-library/mongo/issues/485#issuecomment-891991814
  # (2) dbPath needed fixing in /etc/mongod.conf (~16 lines above) from
  #     /var/lib/mongodb to /library/dbdata/mongodb
  # (3) mongod.lock is effectively NO LONGER A LOCK FILE -- but rather a PID
  #     file (it may be zero bytes, but never goes away) as confirmed with
  #     MongoDB 4.4.14 on RPi 4 and 5.0.9 Ubuntu 22.04 on x86_64.  And now
  #     'mongod --repair --dbpath /library/dbdata/mongodb/' IGNORES mongod.lock
  # (4) mongodb.service needed a more graceful way to shut down than
  #     'killall mongod' (MongoDB 5+ shuts down w/ 15sec quiesce period).
  # (5) MongoDB 6.0 is likely imminent; meantime a 2022-01-12 option (~12
  #     lines below) is MongoDB 5.0.5 compiled for 64-bit RPi 4 and RPi 400:
  # https://andyfelong.com/downloads/raspbian_mongodb_5.0.5.gz
  # https://andyfelong.com/2021/08/mongodb-4-4-under-raspberry-pi-os-64-bit-raspbian64/

  - name: If hardware is Raspberry Pi and mongodb_64bit_version >= 5.0, run 'apt-mark hold mongodb-org mongodb-org-server' -- so MongoDB 5.0.5 binaries {mongo, mongod, mongos} can be installed without apt interfering in future
    command: apt-mark hold mongodb-org mongodb-org-server
    when: rpi_model != "none" and mongodb_64bit_version is version('5.0', '>=')

  - name: If hardware is Raspberry Pi and mongodb_64bit_version >= 5.0, unarchive 76MB {{ iiab_download_url }}//packages/raspbian_mongodb_5.0.5.gz OVERWRITING 5.0.9+ {mongo, mongod, mongos} in /usr/bin
    unarchive:
      remote_src: yes
      src: "{{ iiab_download_url }}/raspbian_mongodb_5.0.5.gz"
      dest: /usr/bin
    when: rpi_model != "none" and mongodb_64bit_version is version('5.0', '>=')

  # end block
  when: ansible_architecture == "aarch64" or ansible_architecture == "x86_64"


# 2. CONFIGURE MongoDB FOR IIAB

# - name: 'Create 3 dirs for MongoDB: /var/lib/mongodb, /var/log/mongodb, {{ mongodb_db_path }}'
#   file:
#     state: directory
#     path: "{{ item }}"
#     owner: mongodb
#     group: mongodb
#   with_items:
#     #- { path: '/var/run/mongodb' }
#     - /var/lib/mongodb
#     - /var/log/mongodb
#     - "{{ mongodb_db_path }}"    # /library/dbdata/mongodb

- name: 'Create dir {{ mongodb_db_path }} (mongodb:mongodb)'
  file:
    state: directory
    path: "{{ mongodb_db_path }}"    # /library/dbdata/mongodb
    owner: mongodb
    group: mongodb

- name: Install mongodb.service, /usr/bin/iiab-mongodb-repair-if-no-lock from templates
  template:
    src: "{{ item.src }}"
    dest: "{{ item.dest }}"
    mode: "{{ item.mode }}"
    #owner: root
    #group: root
  with_items:
    - { src: 'mongodb.service.j2', dest: '/etc/systemd/system/mongodb.service', mode: '0644' }
    - { src: 'iiab-mongodb-repair-if-no-lock.j2', dest: '/usr/bin/iiab-mongodb-repair-if-no-lock', mode: '0755' }

- name: systemctl daemon_reload, so systemd (re)reads mongodb.service
  systemd:
    daemon_reload: yes


# 3. RECORD MongoDB AS INSTALLED

- name: "Set 'mongodb_installed: True'"
  set_fact:
    mongodb_installed: True

- name: "Add 'mongodb_installed: True' to {{ iiab_state_file }}"
  lineinfile:
    path: "{{ iiab_state_file }}"    # /etc/iiab/iiab_state.yml
    regexp: '^mongodb_installed'
    line: 'mongodb_installed: True'