#!/bin/bash

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

function check_port_used() {
    # shellcheck disable=SC2034
    usedport=$(lxc exec "$container" -- bash -c "grep listen /etc/nginx/sites-enabled/$longname.conf | cut -d' ' -f6")
    [[ "$usedport" == "$port" ]]
}

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_service_running
    enable_trace
    return 0
}

function _create() {

    echo "creating limesurvey instance for <$shortname> ..."

    admin_username=$(echo -e "$data" | yq '.admin.username')
    [[ $admin_username = 'null' ]] && echoerr "limesurver recipe requires \`data:admin:username\` into miaou.yaml service definition of <$fqdn>" && exit 1

    admin_email=$(echo -e "$data" | yq '.admin.email')
    [[ $admin_email = 'null' ]] && echoerr "limesurver recipe requires \`data:admin:email\` into miaou.yaml service definition of <$fqdn>" && exit 1
    echo "admin_email = [$admin_email]"

    admin_password=$(echo -e "$data" | yq '.admin.password')
    [[ $admin_password = 'null' ]] && echoerr "limesurver recipe requires \`data:admin:password\` into miaou.yaml service definition of <$fqdn>" && exit 1

    mkdir -p "$MIAOU_CONFIGDIR/apps/limesurvey"
    APP_PORT=$port APP_NAME=$shortname tera -e --env-key env -t "$MIAOU_BASEDIR/templates/apps/limesurvey/limesurvey-host.j2" -o "$MIAOU_CONFIGDIR/apps/limesurvey/$shortname.conf" "$MIAOU_CONFIGDIR/miaou.expanded.yaml"
    echo "creating templates ... OK"

    echo "copying files to container <$container> ... "
    lxc file push --uid 0 --gid 0 "$MIAOU_CONFIGDIR/apps/limesurvey/$shortname.conf" "$container/etc/nginx/sites-available/$longname.conf"
    echo "copying files to container <$container> ... OK"

    if ! (db-maria list | grep -q "$longname"); then
        echo "create empty database <$longname> ... "
        db-maria create "$longname"
        echo "create empty database <$longname> ... OK"
    else
        echo "database already exists!"
    fi

    echo "initialize limesurvey $shortname $longname ..."
    lxc exec "$container" -- bash <<EOF
        set -Eeuo pipefail
        if [[ ! -d /var/www/limesurvey/$shortname ]]; then
            echo "installing new instance of limesurvey into /var/www/limesurvey/$shortname"
            unzip -q /var/www/limesurvey-latest.zip -d /var/www/limesurvey/$shortname
            mv /var/www/limesurvey/$shortname/limesurvey/* /var/www/limesurvey/$shortname
            rm -rf /var/www/limesurvey/$shortname/limesurvey
        else
            echo "instance of limesurvey /var/www/limesurvey/$shortname already defined!"
        fi

        if [[ ! -f /var/www/limesurvey/$shortname/application/config/config.php ]]; then
            echo "create config.php"
            cat << 'EOT2' > /var/www/limesurvey/$shortname/application/config/config.php
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
return array(
	'components' => array(
		'db' => array(
			'connectionString' => 'mysql:host=ct1.lxd;port=3306;dbname=$longname;',
			'username' => '$longname',
			'password' => '$longname',
			'charset' => 'utf8mb4',
			'emulatePrepare' => true,
			'tablePrefix' => '',
		),
		
		 'session' => array (
			'sessionName'=>'$(genpasswd 10)',
		 ),
		
		'urlManager' => array(
			'urlFormat' => 'get',
			'rules' => array(),
			'showScriptName' => true,
		),
	
	),
	'config'=>array(
		'debug'=>0,
		'debugsql'=>0, // Set this to 1 to enanble sql logging, only active when debug = 2
		'mysqlEngine' => 'MYISAM',
        'force_ssl'=> true,
	)
);
EOT2
            echo 'initializing admin...'
            cd /var/www/limesurvey/$shortname/application/commands
            set +e
            php console.php install $admin_username $admin_password $admin_username $admin_email
            [[ \$? -ne 0 ]] && echo 'already initialized!'
            set -e
            echo OK
            echo 'Please visit URL with ?r=admin to log in!'

        else
            echo "config.php already defined!"
        fi

        chown -R www-data:www-data /var/www/limesurvey/$shortname

        echo "enabling limesurvey host into nginx"
        ln -sf "/etc/nginx/sites-available/$longname.conf" "/etc/nginx/sites-enabled/$longname.conf"

        echo "reloading nginx"
        nginx -tq && systemctl reload nginx
EOF
    echo "initialize limesurvey $shortname $longname ... OK"
}

function _update() {
    echo "update"
}

function _delete() {
    echo "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:,domain:,subdomain:,data: -- "$@")
# shellcheck disable=SC2181
[[ "$?" -eq 0 ]] || usage
eval set -- "$TEMP"

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

# extract options and their arguments into variables.
while true; do
    case "$1" in
    --port)
        port=$2
        shift 2
        ;;
    --fqdn)
        fqdn=$2
        shift 2
        ;;
    --container)
        container=$2
        shift 2
        ;;
    --name)
        shortname=$2
        longname="limesurvey-$shortname"
        shift 2
        ;;
    --domain)
        shift 2
        ;;
    --subdomain)
        shift 2
        ;;
    --data)
        data=$2
        shift 2
        ;;
    -c)
        [[ "$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
        ;;
    *)
        echoerr "Internal error: unrecognized option: <$1>"
        exit 1
        ;;
    esac
done

. "$MIAOU_BASEDIR/lib/init.sh"
[[ 
    "$action" != unset &&
    "$port" != unset &&
    "$container" != unset &&
    "$data" != unset &&
    "$fqdn" != unset &&
    "$shortname" != unset ]] || usage

$action