#!/bin/bash

function check() {
    PREFIX="recipe:mariadb:check"
    dpkg -l mariadb-client | grep -q ^ii || return 9
    container_running "$CONTAINER" || return 10
    cat <<EOF | lxc_exec "$CONTAINER" || return 20
        set -Eeuo pipefail
        systemctl is-active mariadb.service &>/dev/null
        ss -tlnp | grep 0.0.0.0:3306 | grep -q maria

        test -f /etc/default/automysqlbackup
        grep -q BACKUPDIR=\"/mnt/BACKUP/mariadb\" /etc/default/automysqlbackup
EOF
    echo "container <$CONTAINER> approved successfully!"
    return 0
}

function build_device_backup() {
    PREFIX="recipe:mariadb:backup"
    if ! (lxc config device list "$CONTAINER" | grep -q BACKUP); then
        local backup_dir="$HOME/LXD/BACKUP/databases-$CONTAINER"
        mkdir -p "$backup_dir"
        lxc config device add "$CONTAINER" BACKUP disk source=$backup_dir path=mnt/BACKUP
    fi
}

function install() {
    sudo_required
    PREFIX="recipe:mariadb:install"
    : $PREFIX

    sudo /opt/debian-bash/tools/idem_apt_install mariadb-client
    echowarn "initializing ..."
    launch_container "$CONTAINER"
    build_device_backup
    echowarn "executing various commands onto container <$CONTAINER>, please be patient ..."
    lxc exec "$CONTAINER" -- bash <<EOF
        set -Eeuo pipefail
        cloud-init status --wait >/dev/null
        . /opt/debian-bash/lib/functions.sh
        apt update && apt dist-upgrade -y
        /opt/debian-bash/tools/idem_apt_install mariadb-server automysqlbackup
        echo "change bind-adress"
        /opt/debian-bash/tools/append_or_replace "^bind-address.*$" "bind-address = 0.0.0.0" /etc/mysql/mariadb.conf.d/50-server.cnf
        systemctl restart mariadb.service

        function systemctl-exists() ([ \$(systemctl list-unit-files "\${1}*" | wc -l) -gt 3 ])
        systemctl-exists exim4.service && systemctl stop exim4.service && systemctl disable exim4.service
        /opt/debian-bash/tools/append_or_replace "^BACKUPDIR=.*$" "BACKUPDIR=\"/mnt/BACKUP/mariadb\"" /etc/default/automysqlbackup
        exit 0
EOF
    echo DONE
}

# MAIN
. "$MIAOU_BASEDIR/lib/init.sh"

arg1_required "$@"
readonly CONTAINER="$1"

check || (
    install
    check
)