#! /usr/bin/env bash


# Make sure the /usr/share/keyrings dir exists
sudo mkdir -p /usr/share/keyrings 2>&1 > /dev/null

# Make sure all of the basic required tools are installed for the code
# below to work
sudo apt-get install --yes --no-install-recommends \
    curl gnupg software-properties-common apt-transport-https

# some utility variables, _YES is optionally '--yes'
[[ ! -z "$1" && "$1" == '--yes' ]] && _YES='--yes'
_OS=$(lsb_release -is | awk '{ print tolower($0) }')
[[ $_OS == 'pop' ]] && _OS='ubuntu'
_REL=$(lsb_release -rs) # Release
_CNM=$(lsb_release -cs) # CodeName
_ARC=$(dpkg --print-architecture) # Architecture

# The function that does the _Heavy Lifting_.
# see the code that follows for the parameter signature
function add_repo() {
    REPO_FQDN=$1 #'download.docker.com'
    GPG_KEY_URL=${2:-https:\/\/$REPO_FQDN\/gpg}
    GPG_KEY_PATH=/usr/share/keyrings/$REPO_FQDN.gpg
    REPO_ARCH=${3:-${_ARC}}
    [[ $REPO_ARCH == '-' ]] && REPO_ARCH='' || REPO_ARCH="arch=$REPO_ARCH"
    REPO_URL=${4:-https:\/\/$REPO_FQDN}
    REPO_SUITE=${5:-$_CNM}
    REPO_CMP=${6:-main}
    
    curl -fsSL $GPG_KEY_URL | sudo gpg --dearmor -o $GPG_KEY_PATH $_YES
    echo "Key created: $GPG_KEY_PATH"
    echo "deb [$(echo "$REPO_ARCH signed-by=$GPG_KEY_PATH" | xargs )] $REPO_URL $REPO_SUITE $REPO_CMP" | \
                sudo tee /etc/apt/sources.list.d/$REPO_FQDN.list > /dev/null
    echo "APT source list added: /etc/apt/sources.list.d/$REPO_FQDN.list"
}

#Long line - 197 characters long
#add_repo  REPO_FQDN/Name                GPG_KEY_URL                                             REPO_ARCH  REPO_URL                                         REPO_SUITE  REPO_CMP # TBD: PIN_PRIORITY
#defaults: <required>                   'https://$REPO_FQDN/gpg'                                 $_ARC     'https://$REPO_FQDN'                              $_CNM      'main'    #      <optional>
#         ----------------------------  ------------------------------------------------------- ---------- ------------------------------------------------ ----------- ---------
# for: docker-ce docker-ce-cli containerd.io docker-compose-plugin
# Also don't forget:
#   remove: docker docker-engine docker.io containerd runc 
#   possibly remove docker-compose and install: https://github.com/docker/compose-switch
add_repo  'download.docker.com'         "https://download.docker.com/linux/$_OS/gpg"            ''         "https://download.docker.com/linux/$_OS"         ''          'stable'
# for: anydesk
add_repo  'deb.anydesk.com'             'https://keys.anydesk.com/repos/DEB-GPG-KEY'            '-'        'http://deb.anydesk.com/'                        'all'       ''
# for: google-cloud-cli
add_repo  'packages.cloud.google.com'   'https://packages.cloud.google.com/apt/doc/apt-key.gpg' '-'        'https://packages.cloud.google.com/apt'          'cloud-sdk' ''
# for: code (optionally: powershell dotnet-*)
add_repo  'packages.microsoft.com'      'https://packages.microsoft.com/keys/microsoft.asc'     ''         "https://packages.microsoft.com/$_OS/$_REL/prod" ''          ''
# for: microsoft-edge-stable
add_repo  'packages.microsoft.com-edge' 'https://packages.microsoft.com/keys/microsoft.asc'     ''         'http://packages.microsoft.com/repos/edge'       'stable'    ''
# for: terraform
add_repo  'apt.releases.hashicorp.com'  'https://apt.releases.hashicorp.com/gpg'                ''         'https://apt.releases.hashicorp.com'             ''          ''

# I really LOVE xscreensavers, but it's been stuck in limbo on the
# `stable` repos, so I install it from the `unstable`, aka `sid`, suite.
# To do that safely, I make sure the repo is pinned to a lower priority.
# I do this BEFORE I add the repo.

# # Debian sid (unstable) as low-priority option
(echo 'Package: *'; echo 'Pin: release a=unstable'; echo 'Pin-Priority: 200') | sudo tee /etc/apt/preferences.d/unstable > /dev/null
# # pin xscreensaver to unstable
(echo 'Package: xscreenaver*'; echo 'Pin: release a=unstable'; echo 'Pin-Priority: 2000') | sudo tee /etc/apt/preferences.d/xscreensaver > /dev/null

# for: xscreensaver xscreensaver-data xscreensaver-data-extra
#      xscreensaver-screensaver-bsod xscreensaver-screensaver-webcollage
# Add the unstable/sid repo - THIS IS DANGEROUS without the pinning via
# /etc/apt/preferences.d files created by the code above.
sudo apt-add-repository $_YES --no-update "deb [arch=amd64] http://http.us.debian.org/debian sid main non-free contrib"

# Finally, run `apt update` to check that everything completed successfully
sudo apt update