#!/bin/bash

set -eu

readonly CMD=${1:-help}
readonly RELEASE=${2:-stable}
readonly DEBIAN_VERSION=${3:-bullseye}
readonly ARCH=${4:-$(dpkg --print-architecture)}
readonly CONTAINER=$RELEASE-$DEBIAN_VERSION-$ARCH
readonly IN_CONTAINER="incus exec $CONTAINER --"
[[ "$DEBIAN_VERSION" == "bullseye" ]] && gitbranch="dev" || gitbranch="$DEBIAN_VERSION"

function help()
{
    cat << EOF

Usage: ./image_builder [command] [additional args...]

  The 'base' image is after yunohost install script, but before postinstall. It is fetched by ynh-dev for local development.
  The 'appci' image is after postinstall, with a first user named 'package_checker' as expected by the CI (package_check)

Commands:

  - rebuild                [RELEASE] [DEBIAN_VERSION]  Rebuild the base and appci image for RELEASE on DEBIAN_VERSION
  - update_appci           [RELEASE] [DEBIAN_VERSION]  Update the appci image for RELEASE on DEBIAN_VERSION
  - rebuild_build_and_lint [RELEASE] [DEBIAN_VERSION]  Rebuild the special 'build-and-lint' image for core CI

Arguments:

  - RELEASE                        stable, testing or unstable
  - DEBIAN_VERSION                 bullseye, or bookworm

EOF
}

function main()
{

    KNOWN_COMMANDS=$(declare -F | awk '{print $3}')
    if [ "$CMD" == "help" ] || [ "$CMD" == "--help" ]
    then
        help
    elif grep -q -w "$1" <<< "$KNOWN_COMMANDS"
    then
        cmd="$1"
        set -x
        $cmd
    else
        echo "Unknown command '$1', check --help to list available commands"
        exit 1
    fi
}

function _publish_as()
{
    local shortname="$1"
    local alias="ynh-$shortname-$DEBIAN_VERSION-$ARCH-$RELEASE-base"

    # Save the finger print to delete the old image later
    #local finger_print_to_delete=$(incus image info "$alias" | grep Fingerprint | awk '{print $2}')
    local should_restart=0

    # If the container is running, stop it
    if [ "$(incus info $CONTAINER | grep Status | awk '{print tolower($2)}')" = "running" ]
    then
        should_restart=1
        incus stop "$CONTAINER"
    fi

    # Create image before install
    incus publish "$CONTAINER" --alias "$alias" --reuse --public "os=YunoHost" "ynh-release=$RELEASE" "release=${DEBIAN_VERSION^}" "architecture=$ARCH" "stage=ynh-$shortname" "description=YunoHost $DEBIAN_VERSION $RELEASE ynh-$shortname $ARCH ($(date '+%Y%m%d'))"

    # Remove old image
    #incus image delete "$finger_print_to_delete"

    if [ $should_restart = 1 ]
    then
        incus start "$CONTAINER"
        sleep 5
        # 240501: fix because the container was not getting an IP
        $IN_CONTAINER dhclient eth0
    fi
}

function rebuild_build_and_lint()
{
    incus info $CONTAINER >/dev/null && incus delete $CONTAINER --force
    incus launch images:debian/$DEBIAN_VERSION/$ARCH $CONTAINER
    sleep 5
    $IN_CONTAINER dhclient eth0

    # Needed to build and access artefacts on core CI ...
    incus file push ./gitlab-runner-light.deb $CONTAINER/root/
    $IN_CONTAINER /bin/bash -c "apt-get update"
    $IN_CONTAINER /bin/bash -c "DEBIAN_FRONTEND=noninteractive apt-get --assume-yes install ca-certificates git curl"
    $IN_CONTAINER /bin/bash -c "dpkg -i /root/gitlab-runner-light.deb"
    $IN_CONTAINER /bin/bash -c "rm /root/gitlab-runner-light.deb"

    # This is for
    # a) building .debs
    TOOLING_APT_DEPENDENCIES="devscripts build-essential debhelper dpkg-dev dh-python wget"
    TOOLING_APT_DEPENDENCIES+=" python3 python3-all python3-yaml python3-jinja2 python3-pip python-is-python3"
    $IN_CONTAINER /bin/bash -c "apt-get update"
    $IN_CONTAINER /bin/bash -c "DEBIAN_FRONTEND=noninteractive SUDO_FORCE_REMOVE=yes apt-get --assume-yes install $TOOLING_APT_DEPENDENCIES --no-install-recommends"
    $IN_CONTAINER /bin/bash -c "apt-get clean"

    # b) running tox, black, mypy, flake8, i18n string consistency check, bot sending PRs
    TOOLING_PIP_DEPENDENCIES=' hub pip pyOpenSSL tox ansi2html toml black jinja2 types-ipaddress types-enum34 types-cryptography types-toml types-requests types-PyYAML types-pyOpenSSL types-mock "packaging<22"'
    [[ $DEBIAN_VERSION == "bullseye" ]] || TOOLING_PIP_DEPENDENCIES+=" --break-system-packages"
    $IN_CONTAINER /bin/bash -c "PIP_PROGRESS_BAR='off' python3 -m pip install -U $TOOLING_PIP_DEPENDENCIES"

    # Disable mandb because zzzzz: https://stackoverflow.com/questions/69974259/fully-disable-man-db
    $IN_CONTAINER /bin/bash -c "mv /usr/bin/mandb /usr/bin/mandb-OFF"
    $IN_CONTAINER /bin/bash -c "cp -p /bin/true /usr/bin/mandb"
    $IN_CONTAINER /bin/bash -c "rm -r /var/cache/man"
    $IN_CONTAINER /bin/bash -c "rm /var/lib/man-db/auto-update"
    $IN_CONTAINER /bin/bash -c "apt-mark hold man-db"

    # Other tricks to save up space (at least 100MB or even 200MB wtf?!)
    # https://stackoverflow.com/questions/59794891/how-does-debian-differ-from-debian-slim
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/doc"
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/info"
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/locale"
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/man"

    # Disable apt annoyances
    $IN_CONTAINER systemctl -q disable apt-daily.timer --now
    $IN_CONTAINER systemctl -q disable apt-daily-upgrade.timer --now
    $IN_CONTAINER systemctl -q disable apt-daily.service --now
    $IN_CONTAINER systemctl -q disable apt-daily-upgrade.service --now
    $IN_CONTAINER rm -f /etc/cron.daily/apt-compat
    $IN_CONTAINER cp /bin/true /usr/lib/apt/apt.systemd.daily

    ###########################################################################
    _publish_as "build-and-lint"
    ###########################################################################

    incus stop $CONTAINER
    incus delete $CONTAINER
}

function _dependencies_to_preinstall()
{
    curl https://raw.githubusercontent.com/YunoHost/yunohost/$gitbranch/debian/control 2> /dev/null | sed -n '/^Depends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | grep -v "moulinette\|ssowat\|yunohost-portal"
    curl https://raw.githubusercontent.com/YunoHost/yunohost/$gitbranch/debian/control 2> /dev/null | sed -n '/^Recommends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | grep -v "yunohost-admin"
    curl https://raw.githubusercontent.com/YunoHost/moulinette/$gitbranch/debian/control 2> /dev/null | sed -n '/^Depends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g"
    # Same as above, except that all dependencies are in the same line
    curl https://raw.githubusercontent.com/YunoHost/ssowat/$gitbranch/debian/control 2> /dev/null | grep '^Depends:' | sed 's/Depends://' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g"
}

function rebuild()
{
    incus info $CONTAINER >/dev/null && incus delete $CONTAINER --force
    incus launch images:debian/$DEBIAN_VERSION/$ARCH $CONTAINER -c security.privileged=true -c security.nesting=true

    sleep 5
    $IN_CONTAINER dhclient eth0

    # Needed to build and access artefacts on core CI ...
    incus file push ./gitlab-runner-light.deb $CONTAINER/root/
    $IN_CONTAINER /bin/bash -c "apt update"
    $IN_CONTAINER /bin/bash -c "DEBIAN_FRONTEND=noninteractive apt-get --assume-yes install ca-certificates git curl"
    $IN_CONTAINER /bin/bash -c "dpkg -i /root/gitlab-runner-light.deb"
    $IN_CONTAINER /bin/bash -c "rm /root/gitlab-runner-light.deb"

    local INSTALL_SCRIPT="https://raw.githubusercontent.com/YunoHost/install_script/main/$DEBIAN_VERSION"

    # Download the YunoHost install script
    $IN_CONTAINER /bin/bash -c "curl $INSTALL_SCRIPT > install.sh"

    # Disable the install of yunohost itself, because we need this for the core CI
    $IN_CONTAINER /bin/bash -c "sed -i -E 's/(step\s+install_yunohost_packages)/#\1/' install.sh"
    $IN_CONTAINER /bin/bash -c "sed -i -E 's/(^\s+install_yunohost_packages)/#\1/'    install.sh"

    # Trick to disable restarting the service during install
    $IN_CONTAINER /bin/bash -c "sed -i -E 's/(step\s+restart_services)/echo skip restart service #\1/' install.sh"
    $IN_CONTAINER /bin/bash -c "echo exit 101 > /usr/sbin/policy-rc.d"
    $IN_CONTAINER /bin/bash -c "chmod +x /usr/sbin/policy-rc.d"

    # Actual install of everything...except yunohost itself
    $IN_CONTAINER /bin/bash -c "cat install.sh | bash -s -- -a -d $RELEASE"

    # To extract the dependencies, we want to retrieve the lines between "^Dependencies:" and the new line that doesn't start with a space (exclusively) . Then, we remove ",", then we remove the version specifiers "(>= X.Y)", then we add simple quotes to packages when there is a pipe (or) 'php-mysql|php-mysqlnd'.
    $IN_CONTAINER /bin/bash -c "apt update"
    $IN_CONTAINER /bin/bash -c "DEBIAN_FRONTEND=noninteractive SUDO_FORCE_REMOVE=yes apt-get --assume-yes install python3-all $(_dependencies_to_preinstall | tr '\n' ' ')"
    $IN_CONTAINER /bin/bash -c "apt clean"

    $IN_CONTAINER /bin/bash -c "rm /usr/sbin/policy-rc.d"

    $IN_CONTAINER systemctl -q disable apt-daily.timer --now
    $IN_CONTAINER systemctl -q disable apt-daily-upgrade.timer --now
    $IN_CONTAINER systemctl -q disable apt-daily.service --now
    $IN_CONTAINER systemctl -q disable apt-daily-upgrade.service --now
    $IN_CONTAINER rm -f /etc/cron.daily/apt-compat
    $IN_CONTAINER cp /bin/true /usr/lib/apt/apt.systemd.daily

    # Disable mandb because zzzzz: https://stackoverflow.com/questions/69974259/fully-disable-man-db
    $IN_CONTAINER /bin/bash -c "mv /usr/bin/mandb /usr/bin/mandb-OFF"
    $IN_CONTAINER /bin/bash -c "cp -p /bin/true /usr/bin/mandb"
    $IN_CONTAINER /bin/bash -c "rm -r /var/cache/man"
    $IN_CONTAINER /bin/bash -c "rm /var/lib/man-db/auto-update"
    $IN_CONTAINER /bin/bash -c "apt-mark hold man-db"

    # Other tricks to save up space (at least 100MB or even 200MB wtf?!)
    # https://stackoverflow.com/questions/59794891/how-does-debian-differ-from-debian-slim
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/doc"
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/info"
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/locale"
    $IN_CONTAINER /bin/bash -c "rm -rf /usr/share/man"

    # Disable services that are useless in the vast majority of cases to try to improve perfs
    $IN_CONTAINER systemctl -q disable rspamd --now || true
    $IN_CONTAINER systemctl -q disable dovecot --now || true
    $IN_CONTAINER systemctl -q disable postsrsd --now || true
    $IN_CONTAINER systemctl -q disable metronome --now || true
    $IN_CONTAINER systemctl -q disable fake-hwclock.service --now || true
    $IN_CONTAINER systemctl -q disable haveged.service --now || true
    $IN_CONTAINER systemctl -q disable unattended-upgrades.service --now || true
    $IN_CONTAINER systemctl -q disable e2scrub_all.timer --now || true
    $IN_CONTAINER systemctl -q disable logrotate.timer --now || true
    $IN_CONTAINER systemctl -q disable phpsessionclean.timer --now || true
    $IN_CONTAINER systemctl -q disable systemd-tmpfiles-clean.timer --now || true

    # FIXME: where does this comes from x_x / why
    $IN_CONTAINER sed -i 's/worker_processes.*;/worker_processes 4;/g' /etc/nginx/nginx.conf

    $IN_CONTAINER reboot 0
    sleep 5

    ###########################################################################
    _publish_as "before-install"
    ###########################################################################

    # Publish ynh-dev image
    YUNOHOST_PACKAGES="yunohost yunohost-admin"
    if [[ $DEBIAN_VERSION == "bookworm" ]]; then
        YUNOHOST_PACKAGES+=" yunohost-portal"
    fi
    $IN_CONTAINER /bin/bash -c "apt update"
    $IN_CONTAINER /bin/bash -c "DEBIAN_FRONTEND=noninteractive SUDO_FORCE_REMOVE=yes apt-get --assume-yes install $YUNOHOST_PACKAGES"
    $IN_CONTAINER /bin/bash -c "apt clean"
    $IN_CONTAINER systemctl -q disable yunohost-api --now
    $IN_CONTAINER systemctl -q disable yunoprompt --now

    ###########################################################################
    _publish_as "dev"
    ###########################################################################

    local YUNO_PWD="SomeSuperStrongPassword"
    local DOMAIN="domain.tld"
    local SUBDOMAIN="sub.$DOMAIN"
    local TEST_USER="package_checker"
    local TEST_USER_DISPLAY=${TEST_USER//"_"/""}

    # Disable password strength check
    $IN_CONTAINER yunohost tools postinstall --domain $DOMAIN --password $YUNO_PWD --username $TEST_USER --fullname "$TEST_USER_DISPLAY"

    $IN_CONTAINER /bin/bash -c "echo 'admin_strength: -1' >> /etc/yunohost/settings.yml"
    $IN_CONTAINER /bin/bash -c "echo 'user_strength: -1' >> /etc/yunohost/settings.yml"

    $IN_CONTAINER yunohost domain add $SUBDOMAIN

    $IN_CONTAINER yunohost --version

    ###########################################################################
    _publish_as "appci"
    ###########################################################################

    CORE_TESTS_APT_DEPENDENCIES="python3-pip"
    CORE_TESTS_PIP_DEPENCENDIES='mock pip pyOpenSSL pytest pytest-cov pytest-mock pytest-sugar requests-mock "packaging<22"'

    if [[ "$DEBIAN_VERSION" == "bookworm" ]]
    then
            # We add php8.2-cli, mariadb-client and mariadb-server to the dependencies for test_app_resources
            CORE_TESTS_APT_DEPENDENCIES+=" php8.2-cli mariadb-client mariadb-server"
            CORE_TESTS_PIP_DEPENCENDIES+=" --break-system-packages"
    fi

    $IN_CONTAINER /bin/bash -c "apt-get update"
    $IN_CONTAINER /bin/bash -c "DEBIAN_FRONTEND=noninteractive SUDO_FORCE_REMOVE=yes apt-get --assume-yes install --no-install-recommends $CORE_TESTS_APT_DEPENDENCIES"
    $IN_CONTAINER /bin/bash -c "apt-get clean"
    $IN_CONTAINER /bin/bash -c "PIP_PROGRESS_BAR='off' python3 -m pip install -U $CORE_TESTS_PIP_DEPENCENDIES"

    ###########################################################################
    _publish_as "core-tests"
    ###########################################################################

    incus stop $CONTAINER
    incus delete $CONTAINER
}

function update_appci()
{
    local BASE="ynh-dev-$DEBIAN_VERSION-$ARCH-$RELEASE-base"
    incus launch $BASE $CONTAINER -c security.privileged=true -c security.nesting=true

    sleep 3

    echo "nameserver 8.8.8.8" | $IN_CONTAINER tee /etc/resolv.conf

    sleep 3

    $IN_CONTAINER ping -c3 deb.debian.org || exit 1

    $IN_CONTAINER apt-get update
    $IN_CONTAINER apt-get dist-upgrade -y

    local YUNO_PWD="SomeSuperStrongPassword"
    local DOMAIN="domain.tld"
    local SUBDOMAIN="sub.$DOMAIN"
    local TEST_USER="package_checker"
    local TEST_USER_DISPLAY=${TEST_USER//"_"/""}

    # Disable password strength check
    $IN_CONTAINER yunohost tools postinstall --domain $DOMAIN --password $YUNO_PWD --username $TEST_USER --fullname "$TEST_USER_DISPLAY"

    $IN_CONTAINER /bin/bash -c "echo 'admin_strength: -1' >> /etc/yunohost/settings.yml"
    $IN_CONTAINER /bin/bash -c "echo 'user_strength: -1' >> /etc/yunohost/settings.yml"

    $IN_CONTAINER yunohost domain add $SUBDOMAIN

    $IN_CONTAINER yunohost --version


    incus stop $CONTAINER
    _publish_as "appci"
    incus delete $CONTAINER
}

main $@