#!/bin/bash

function check_database_exists() {
    db-psql list | grep -q "$longname"
}

function check_port_used() {
    # shellcheck disable=SC2034
    usedport=$(lxc exec "$container" -- cat /etc/nginx/sites-enabled/"$longname".conf | grep listen | cut -d ' ' -f2)
    [[ "$usedport" == "$port" ]]
}

function check_directory_exists() {
    lxc exec "$container" -- test -d /var/www/"$longname"
}

function check_service_running() {
    lxc exec "$container" -- bash -c "systemctl is-active --quiet nginx.service"
}

function _read() {
    disable_trace
    check_database_exists
    check_container "$container"
    check_port_used
    check_directory_exists
    check_service_running
    enable_trace
    return 0
}

function _create() {
    PREFIX="recipe:dolibarr:create"
    : $PREFIX

    echo "create a Dolibarr instance for $shortname"

    lxc exec "$container" -- bash <<EOF
        set -Eeuo pipefail
        echo "install latest release ... "
        cd /var/www
        PATH="\$PATH:/opt/miaou-bash/tools"
        VERSION="\$(wget_semver github Dolibarr/dolibarr)"
        if [[ ! -f "dolibarr-\$VERSION.tgz" ]]; then
            wget_release github Dolibarr/dolibarr
        else
            echo "dolibarr version=\$VERSION already downloaded!"
        fi

        if [[ ! -d "$longname" ]]; then
            tar -xzvf "dolibarr-\$VERSION.tgz"
            mv dolibarr-\$VERSION $longname
            chown www-data:www-data -R $longname
        else
            echo "$longname already created!"
        fi

EOF

    echo "generating configuration files from templates... "
    mkdir -p "$MIAOU_CONFIGDIR/apps/dolibarr/$shortname"
    PHP_VERSION=$(lxc exec "$container" -- dpkg -l php-fpm | grep "^ii" | cut -d ':' -f2 | cut -d '+' -f1)
    APP_PORT=$port APP_NAME=$longname PHP_VERSION=$PHP_VERSION tera -e -t "$MIAOU_BASEDIR/templates/apps/dolibarr/host.j2" -o "$MIAOU_CONFIGDIR/apps/dolibarr/$shortname/host.conf" "$MIAOU_CONFIGDIR/miaou.expanded.yaml" >/dev/null

    echo "copying configuration files onto container <$container>... "
    lxc file push --uid 0 --gid 0 "$MIAOU_CONFIGDIR/apps/dolibarr/$shortname/host.conf" "$container/etc/nginx/sites-available/$longname.conf"
    echo "copying files over container <$container> ... OK"

    if ! (db-psql list | grep -q "$longname"); then
        echo "create empty database <$longname> ... "
        db-psql create "$longname"
        echo "create empty database <$longname> ... OK"

    else
        echo "database already exists!"
    fi

    echo "enable host config..."
    lxc exec "$container" -- bash <<EOF
        set -Eeuo pipefail
        cd /etc/nginx/sites-enabled
        ln -sf ../sites-available/$longname.conf
        mkdir -p /var/log/nginx/$longname
        nginx -t
        systemctl reload nginx
EOF
    echo "enable host config... OK"
}

function _update() {
    echo "TODO: update"
}

function _delete() {
    echo "TODO: delete"
}

function usage() {
    echo "Usage: $COMMAND_NAME -c|r|u|d --port PORT --container CONTAINER --name NAME"
    exit 2
}

### MAIN

# init_strict

COMMAND_NAME=$(basename "$0")

# read the options

TEMP=$(getopt -n "$COMMAND_NAME" -o crud --long port:,container:,name:,fqdn: -- "$@")
# shellcheck disable=SC2181
[[ "$?" -eq 0 ]] || usage
eval set -- "$TEMP"

action="unset"
port="unset"
container="unset"
shortname="unset"
longname="unset"

# extract options and their arguments into variables.
while true; do
    case "$1" in
    --port)
        port=$2
        shift 2
        ;;
    --fqdn)
        shift 2
        ;;
    --container)
        container=$2
        shift 2
        ;;
    --name)
        shortname=$2
        longname="dolibarr-$shortname"
        shift 2
        ;;
    -c)
        [[ "$action" == "unset" ]] || usage
        action="_create"
        shift 1
        ;;
    -r)
        [[ "$action" == "unset" ]] || usage
        action="_read"
        shift 1
        ;;
    -u)
        [[ "$action" == "unset" ]] || usage
        action="_update"
        shift 1
        ;;
    -d)
        [[ "$action" == "unset" ]] || usage
        action="_delete"
        shift 1
        ;;
    --)
        shift
        break
        ;;
    *)
        echo "Internal error!"
        exit 1
        ;;
    esac
done

[[ 
    "$action" != unset &&
    "$port" != unset &&
    "$container" != unset &&
    "$shortname" != unset ]] || usage

. "$MIAOU_BASEDIR/lib/init.sh"

$action