#!/bin/bash

export DEBIAN_FRONTEND=noninteractive

DISTRO="bullseye"
RELEASE="stable"
NODEREPO="node_20.x"

try() {
    bash -c "$1"
}

catch() {
    echo "error executing command"

    exit 1
}

execute() {
    try "$1" || catch
}

alternates() {
    if [ "|${DISTRO}|" == "|${1}|" ]; then
        DISTRO="${2}"
    fi
}

reset() {
    rm -f /usr/share/keyrings/nodesource.gpg
    rm -f /usr/share/keyrings/yarnkey.gpg
    rm -f /usr/share/keyrings/hoobs.gpg

    rm -f /etc/apt/sources.list.d/nodesource.list
    rm -f /etc/apt/sources.list.d/yarn.list
    rm -f /etc/apt/sources.list.d/hoobs.list
}

validate() {
    if $(uname -m | grep -Eq ^armv6); then
        echo "device specifies an unsupported architecture"

        exit 1
    fi

    DISTRO=$(lsb_release -c -s)

    alternates "solydxk-9" "stretch"
    alternates "sana" "jessie"
    alternates "kali-rolling" "bullseye"
    alternates "Tyche" "stretch"
    alternates "Nibiru" "buster"
    alternates "Horizon" "stretch"
    alternates "Continuum" "stretch"
    alternates "patito feo" "buster"
    alternates "maya" "precise"
    alternates "qiana" "trusty"
    alternates "rafaela" "trusty"
    alternates "rebecca" "trusty"
    alternates "rosa" "trusty"
    alternates "sarah" "xenial"
    alternates "serena" "xenial"
    alternates "sonya" "xenial"
    alternates "sylvia" "xenial"
    alternates "tara" "bionic"
    alternates "tessa" "bionic"
    alternates "tina" "bionic"
    alternates "tricia" "bionic"
    alternates "ulyana" "focal"
    alternates "ulyssa" "focal"
    alternates "uma" "focal"
    alternates "betsy" "jessie"
    alternates "cindy" "stretch"
    alternates "debbie" "buster"
    alternates "luna" "precise"
    alternates "freya" "trusty"
    alternates "loki" "xenial"
    alternates "juno" "bionic"
    alternates "hera" "bionic"
    alternates "odin" "focal"
    alternates "toutatis" "precise"
    alternates "belenos" "trusty"
    alternates "flidas" "xenial"
    alternates "etiona" "bionic"
    alternates "lugalbanda" "xenial"
    alternates "anokha" "wheezy"
    alternates "anoop" "jessie"
    alternates "drishti" "stretch"
    alternates "unnati" "buster"
    alternates "bunsen-hydrogen" "jessie"
    alternates "helium" "stretch"
    alternates "lithium" "buster"
    alternates "chromodoris" "jessie"
    alternates "green" "sid"
    alternates "amber" "buster"
    alternates "jessie" "jessie"
    alternates "ascii" "stretch"
    alternates "beowulf" "buster"
    alternates "ceres" "sid"
    alternates "panda" "sid"
    alternates "unstable" "sid"
    alternates "stable" "buster"
    alternates "onyedi" "stretch"
    alternates "lemur-3" "stretch"
    alternates "orel" "stretch"
    alternates "dolcetto" "stretch"

    if [ "|${DISTRO}|" == "|debian|" ]; then
        FOUND=$([ -e /etc/debian_version ] && cut -d/ -f1 < /etc/debian_version)

        if [ "|${NEWDISTRO}|" != "||" ]; then
            DISTRO=$FOUND
        fi
    fi
}

availability() {
    try "curl -sLf -o /dev/null 'https://deb.nodesource.com/${NODEREPO}/dists/${DISTRO}/Release'"

    if [[ $? != 0 ]]; then
        DISTRO="bullseye"
    fi
}

prerequisites() {
    PREREQUISITES=" ca-certificates libgnutls30"

    if [ ! -e /usr/lib/apt/methods/https ]; then
        PREREQUISITES="${PREREQUISITES} apt-transport-https"
    fi

    if [ ! -x /usr/bin/lsb_release ]; then
        PREREQUISITES="${PREREQUISITES} lsb-release"
    fi

    if [ ! -x /usr/bin/curl ]; then
        PREREQUISITES="${PREREQUISITES} curl"
    fi

    if [ ! -x /usr/bin/gpg ]; then
        PREREQUISITES="${PREREQUISITES} gnupg"
    fi

    execute "apt-get update --allow-releaseinfo-change"

    if [ "|${PREREQUISITES}|" != "||" ]; then
        execute "apt-get install -y${PREREQUISITES} > /dev/null 2>&1"
    fi
}

setup() {
    if [ -f "/etc/apt/sources.list.d/chris-lea-node_js-$DISTRO.list" ]; then
        try "add-apt-repository -y -r ppa:chris-lea/node.js"
        execute "rm -f /etc/apt/sources.list.d/chris-lea-node_js-${DISTRO}.list"
    fi

    execute "curl -ks https://deb.nodesource.com/gpgkey/nodesource.gpg.key | gpg --dearmor | tee /usr/share/keyrings/nodesource.gpg > /dev/null"
    execute "curl -ks https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor | tee /usr/share/keyrings/yarnkey.gpg > /dev/null"
    execute "curl -ks https://dl.hoobs.org/debian/pubkey.gpg.key | gpg --dearmor | tee /usr/share/keyrings/hoobs.gpg > /dev/null"

    execute "echo 'deb [signed-by=/usr/share/keyrings/nodesource.gpg] https://deb.nodesource.com/${NODEREPO} ${DISTRO} main' | tee /etc/apt/sources.list.d/nodesource.list"
    execute "echo 'deb-src [signed-by=/usr/share/keyrings/nodesource.gpg] https://deb.nodesource.com/${NODEREPO} ${DISTRO} main' | tee -a /etc/apt/sources.list.d/nodesource.list"
    execute "echo 'deb [signed-by=/usr/share/keyrings/yarnkey.gpg] https://dl.yarnpkg.com/debian/ stable main' | tee /etc/apt/sources.list.d/yarn.list"
    execute "echo 'deb [signed-by=/usr/share/keyrings/hoobs.gpg] https://dl.hoobs.org/debian/ ${RELEASE} main' | tee /etc/apt/sources.list.d/hoobs.list"

    execute 'apt-get update'
}

validate
reset
prerequisites
availability
setup