#!/bin/bash

# This script is run before the box code is switched. This means that we can
# put network related/curl downloads here. If the script fails, the old code
# will continue to run

set -eu -o pipefail

if [[ ${EUID} -ne 0 ]]; then
    echo "This script should be run as root." > /dev/stderr
    exit 1
fi

function log() {
  echo -e "$(date +'%Y-%m-%dT%H:%M:%S')" "==> installer: $1"
}

apt_ready="no"
function prepare_apt_once() {
    [[ "${apt_ready}" == "yes" ]] && return

    log "Making sure apt is in a good state"

    log "Waiting for all dpkg tasks to finish..."
    while fuser /var/lib/dpkg/lock; do
        sleep 1
    done

    # it's unclear what needs to be run first or whether both these command should be run. so keep trying both
    for count in {1..3}; do
        # alternative to apt-install -y --fix-missing ?
        if ! dpkg --force-confold --configure -a; then
            log "dpkg reconfigure failed (try $count)"
            dpkg_configure="no"
        else
            dpkg_configure="yes"
        fi

        if ! apt update -y; then
            log "apt update failed (try $count)"
            apt_update="no"
        else
            apt_update="yes"
        fi

        [[ "${dpkg_configure}" == "yes" && "${apt_update}" == "yes" ]] && break

        sleep 1
    done

    apt_ready="yes"

    if [[ "${dpkg_configure}" == "yes" && "${apt_update}" == "yes" ]]; then
        log "apt is ready"
    else
        log "apt is not ready but proceeding anyway"
    fi
}

readonly user=yellowtent
readonly box_src_dir=/home/${user}/box

readonly curl="curl --fail --connect-timeout 20 --retry 10 --retry-delay 2 --max-time 2400"
readonly script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
readonly box_src_tmp_dir="$(realpath ${script_dir}/..)"

readonly ubuntu_version=$(lsb_release -rs)
readonly ubuntu_codename=$(lsb_release -cs)

readonly is_update=$(systemctl is-active -q box && echo "yes" || echo "no")

log "Updating from $(cat $box_src_dir/VERSION 2>/dev/null) to $(cat $box_src_tmp_dir/VERSION 2>/dev/null)"

# https://docs.docker.com/engine/installation/linux/ubuntulinux/
readonly docker_version=20.10.21
readonly containerd_version=1.6.10-1
if ! which docker 2>/dev/null || [[ $(docker version --format {{.Client.Version}}) != "${docker_version}" ]]; then
    log "installing/updating docker"

    # create systemd drop-in file already to make sure images are with correct driver
    mkdir -p /etc/systemd/system/docker.service.d
    echo -e "[Service]\nExecStart=\nExecStart=/usr/bin/dockerd -H fd:// --log-driver=journald --exec-opt native.cgroupdriver=cgroupfs --storage-driver=overlay2 --experimental --ip6tables" > /etc/systemd/system/docker.service.d/cloudron.conf

    # there are 3 packages for docker - containerd, CLI and the daemon (https://download.docker.com/linux/ubuntu/dists/jammy/pool/stable/amd64/)
    $curl -sL "https://download.docker.com/linux/ubuntu/dists/${ubuntu_codename}/pool/stable/amd64/containerd.io_${containerd_version}_amd64.deb" -o /tmp/containerd.deb
    $curl -sL "https://download.docker.com/linux/ubuntu/dists/${ubuntu_codename}/pool/stable/amd64/docker-ce-cli_${docker_version}~3-0~ubuntu-${ubuntu_codename}_amd64.deb" -o /tmp/docker-ce-cli.deb
    $curl -sL "https://download.docker.com/linux/ubuntu/dists/${ubuntu_codename}/pool/stable/amd64/docker-ce_${docker_version}~3-0~ubuntu-${ubuntu_codename}_amd64.deb" -o /tmp/docker.deb

    log "installing docker"
    prepare_apt_once
    apt install -y /tmp/containerd.deb  /tmp/docker-ce-cli.deb /tmp/docker.deb
    rm /tmp/containerd.deb /tmp/docker-ce-cli.deb /tmp/docker.deb
fi

# we want atleast nginx 1.14 for TLS v1.3 support. Ubuntu 20/22 already has nginx 1.18
# Ubuntu 18 OpenSSL does not have TLS v1.3 support, so we use the upstream nginx packages
readonly nginx_version=$(nginx -v 2>&1)
if [[ "${ubuntu_version}" == "20.04" ]]; then
    if [[ "${nginx_version}" == *"Ubuntu"* ]]; then
        log "switching nginx to ubuntu package"
        prepare_apt_once
        apt remove -y nginx
        apt install -y nginx-full
    fi
elif [[ "${ubuntu_version}" == "18.04" ]]; then
    if [[ "${nginx_version}" != *"1.18."* ]]; then
        log "installing/updating nginx 1.18"
        $curl -sL http://nginx.org/packages/ubuntu/pool/nginx/n/nginx/nginx_1.18.0-2~${ubuntu_codename}_amd64.deb -o /tmp/nginx.deb

        prepare_apt_once

        # apt install with install deps (as opposed to dpkg -i)
        apt install -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" --force-yes /tmp/nginx.deb
        rm /tmp/nginx.deb
    fi
fi

readonly node_version=16.18.1
if ! which node 2>/dev/null || [[ "$(node --version)" != "v${node_version}" ]]; then
    log "installing/updating node ${node_version}"
    mkdir -p /usr/local/node-${node_version}
    $curl -sL https://nodejs.org/dist/v${node_version}/node-v${node_version}-linux-x64.tar.gz -o /tmp/node.tar.gz
    tar zxvf /tmp/node.tar.gz --strip-components=1 -C /usr/local/node-${node_version}
    rm /tmp/node.tar.gz
    ln -sf /usr/local/node-${node_version}/bin/node /usr/bin/node
    ln -sf /usr/local/node-${node_version}/bin/npm /usr/bin/npm
    rm -rf /usr/local/node-16.14.2
fi

# obsolete module
rm -rf /usr/local/cloudron-syslog

# note that rebuild requires the above node
for try in `seq 1 10`; do
    # for reasons unknown, the dtrace package will fail. but rebuilding second time will work

    # We need --unsafe-perm as we run as root and the folder is owned by root,
    # however by default npm drops privileges for npm rebuild
    # https://docs.npmjs.com/misc/config#unsafe-perm
    if cd "${box_src_tmp_dir}" && npm rebuild --unsafe-perm; then break; fi
    log "Failed to rebuild, trying again"
    sleep 5
done

if [[ ${try} -eq 10 ]]; then
    log "npm rebuild failed, giving up"
    exit 4
fi

log "downloading new addon images"
images=$(node -e "let i = require('${box_src_tmp_dir}/src/infra_version.js'); console.log(i.baseImages.map(function (x) { return x.tag; }).join(' '), Object.keys(i.images).map(function (x) { return i.images[x].tag; }).join(' '));")

log "\tPulling docker images: ${images}"
if ! curl -s --fail --connect-timeout 2 --max-time 2 https://ipv4.api.cloudron.io/api/v1/helper/public_ip; then
    docker_registry=registry.ipv6.docker.com
else
    docker_registry=registry-1.docker.io
fi
log "\tUsing ${docker_registry} as the docker registry"

for image in ${images}; do
    while ! docker pull "${docker_registry}/${image}"; do           # this pulls the image using the sha256
        log "Could not pull ${image}"
        sleep 5
    done
    while ! docker pull "${docker_registry}/${image%@sha256:*}"; do  # this will tag the image for readability
        log "Could not pull ${image%@sha256:*}"
        sleep 5
   done
done

log "creating cloudron-support user"
if ! id cloudron-support 2>/dev/null; then
    useradd --system --comment "Cloudron Support (support@cloudron.io)" --create-home --no-user-group --shell /bin/bash cloudron-support
fi

log "locking the ${user} account"
usermod --shell /usr/sbin/nologin "${user}"
passwd --lock "${user}"

if [[ "${is_update}" == "yes" ]]; then
    log "stop box service for update"
    ${box_src_dir}/setup/stop.sh
fi

# ensure we are not inside the source directory, which we will remove now
cd /root

log "switching the box code"
rm -rf "${box_src_dir}"
mv "${box_src_tmp_dir}" "${box_src_dir}"
chown -R "${user}:${user}" "${box_src_dir}"

log "calling box setup script"
"${box_src_dir}/setup/start.sh"