#!/bin/bash

set -e

if ! dpkg --list | grep -q 'ii *metronome '
then
    echo 'metronome is not installed, skipping'
    exit 0
fi

do_pre_regen() {
    pending_dir=$1

    cd /usr/share/yunohost/conf/metronome

    # create directories for pending conf
    metronome_dir="${pending_dir}/etc/metronome"
    metronome_conf_dir="${metronome_dir}/conf.d"
    mkdir -p "$metronome_conf_dir"

    # retrieve variables
    main_domain=$(cat /etc/yunohost/current_host)

    # install main conf file
    cat metronome.cfg.lua \
        | sed "s/{{ main_domain }}/${main_domain}/g" \
            >"${metronome_dir}/metronome.cfg.lua"

    # Trick such that old conf files are flagged as to remove
    for domain in $YNH_DOMAINS; do
        touch "${metronome_conf_dir}/${domain}.cfg.lua"
    done

    # add domain conf files
    domain_list="$(yunohost domain list --features xmpp --output-as json | jq -r ".domains[]")"
    for domain in $domain_list; do
        cat domain.tpl.cfg.lua \
            | sed "s/{{ domain }}/${domain}/g" \
                >"${metronome_conf_dir}/${domain}.cfg.lua"
    done

    # remove old domain conf files
    conf_files=$(ls -1 /etc/metronome/conf.d \
        | awk '/^[^\.]+\.[^\.]+.*\.cfg\.lua$/ { print $1 }')
    for file in $conf_files; do
        domain=${file%.cfg.lua}
        [[ $YNH_DOMAINS =~ $domain ]] \
            || touch "${metronome_conf_dir}/${file}"
    done
}

do_post_regen() {
    regen_conf_files=$1

    # retrieve variables
    main_domain=$(cat /etc/yunohost/current_host)

    # create metronome directories for domains
    for domain in $YNH_MAIN_DOMAINS; do
        mkdir -p "/var/lib/metronome/${domain//./%2e}/pep"
        # http_upload directory must be writable by metronome and readable by nginx
        mkdir -p "/var/xmpp-upload/${domain}/upload"
        # sgid bit allows that file created in that dir will be owned by www-data
        # despite the fact that metronome ain't in the www-data group
        chmod g+s "/var/xmpp-upload/${domain}/upload"
    done

    # fix some permissions
    [ ! -e '/var/xmpp-upload' ] || chown -R metronome:www-data "/var/xmpp-upload/"
    [ ! -e '/var/xmpp-upload' ] || chmod 750 "/var/xmpp-upload/"

    # metronome should be in ssl-cert group to let it access SSL certificates
    usermod -aG ssl-cert metronome
    chown -R metronome: /var/lib/metronome/
    chown -R metronome: /etc/metronome/conf.d/

    if [[ -z "$(ls /etc/metronome/conf.d/*.cfg.lua 2>/dev/null)" ]]
    then
        if systemctl is-enabled metronome &>/dev/null
        then
            systemctl disable metronome --now 2>/dev/null
        fi
    else
        if ! systemctl is-enabled metronome &>/dev/null
        then
            systemctl enable metronome --now 2>/dev/null
            sleep 3
        fi

        [[ -z "$regen_conf_files" ]] \
            || systemctl restart metronome
    fi
}

do_$1_regen ${@:2}