#!/bin/sh

set -e

ucf_register_templates() {
    for template in /etc/pmg/templates/*; do
        [ -e "$template" ] || continue;
        template_base=$(basename "${template}")
        if echo "${template_base}" | grep -q '\.ucf-'; then
            continue
        fi
        if [ -e "/var/lib/pmg/templates/${template_base}" ]; then
            ucf "/var/lib/pmg/templates/${template_base}" "${template}"
            ucfr pmg-api "${template}"
        else
            echo "template '${template}' not shipped by pmg-api."
        fi
    done
}

migrate_apt_auth_conf() {
    output=""
    removed=""
    match=0

    while read -r l; do
        if echo "$l" | grep -q "^machine enterprise.proxmox.com/debian/pmg"; then
            match=1
        elif echo "$l" | grep -q "machine"; then
            match=0
        fi

        if test "$match" = "1"; then
            removed="$removed\n$l"
        else
            output="$output\n$l"
        fi
    done < /etc/apt/auth.conf

    if test -n "$removed"; then
        if test ! -e /etc/apt/auth.conf.d/pmg.conf; then
            echo "Migrating APT auth config for enterprise.proxmox.com to /etc/apt/auth.conf.d/pmg.conf .."
            echo "$removed" > /etc/apt/auth.conf.d/pmg.conf
        else
            echo "Removing stale APT auth config from /etc/apt/auth.conf"
        fi
        echo "$output" > /etc/apt/auth.conf
    fi
}

case "$1" in
    triggered)

        test -e /proxmox_install_mode && exit 0;

        # Note: reload-or-try-restart fails if service is not active
        for service in pmgdaemon pmgproxy pmg-smtp-filter pmgpolicy pmgtunnel pmgmirror; do
            if systemctl --quiet is-active $service.service ; then
                deb-systemd-invoke reload-or-try-restart $service.service >/dev/null || true
            fi
        done

        exit 0
    ;;

    configure)
        # FIXME: remove in PMG 8.0
        if test ! -e /proxmox_install_mode && test -n "$2" && dpkg --compare-versions "$2" 'lt' '7.0-2~'; then
            # PMG 5 ISOs had a bug and did not generated a unique machine-id. below is a list of
            # all machine-ids from all ISOs (released, tests & internal) possibly affected
            if grep -q \
                -e e378bde63ac54872a85af23a8e4dac73 \
                -e 932b668d1fad4709b4976d54152d223c \
                -e 931a8410cd034202a26b0e19d56e157a \
                -e 9a1f3c5284e1423c9b0e0ee5819db6c9 \
                -e 5472a49c6436426fbebd7881f7b7f13b \
                /etc/machine-id
            then
                echo "found static machine-id bug from Proxmox Mail Gateway ISO installer <= 5.4, regenerating machine-id"
                systemd-id128 new | tee /etc/machine-id.new /var/lib/dbus/machine-id.new
                # atomically replace
                mv /etc/machine-id.new /etc/machine-id
                mv /var/lib/dbus/machine-id.new /var/lib/dbus/machine-id
                echo "new machine-id generated, a reboot is recommended"
            else
                echo "machine-id check OK"
            fi
        fi

        if test ! -e /proxmox_install_mode ; then

            pmgconfig init
            pmgdb init

            ucf_register_templates
            pmgconfig sync --restart

            if [ -z "$2" ]; then
                if systemctl --quiet is-active pmgpolicy.service ; then
                    deb-systemd-invoke reload-or-try-restart postgresql.service >/dev/null || true
                fi
                deb-systemd-invoke restart postfix.service >/dev/null || true
            fi

            pmgdb update  >/dev/null 2>&1 &

            update-mime-database /usr/share/mime

        else
            # rewrite banner
            pmgbanner || true
        fi

        if test ! -e /proxmox_install_mode && test -n "$2" && dpkg --compare-versions "$2" 'lt' '7.1-7~'; then
            if test -e /etc/apt/auth.conf ; then
                migrate_apt_auth_conf
            fi
        fi
    ;;

    abort-upgrade)
        ucf_register_templates
    ;;

    abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

if test ! -e /proxmox_install_mode ; then
    for service in pmgdaemon pmgproxy; do
        if [ -n "$2" ]; then
            # Note: reload-or-try-restart fails if service is not active
            if systemctl --quiet is-active $service.service ; then
                deb-systemd-invoke reload-or-try-restart $service.service >/dev/null || true
            fi
        else
            deb-systemd-invoke start $service.service > /dev/null || true
        fi
    done
fi

exit 0