#!/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 wordpress instance for <$shortname> ... "

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

    echo "copying files over container <$container> ... "
    lxc file push --uid 0 --gid 0 "$MIAOU_CONFIGDIR/apps/wordpress/$longname.conf" "$container/etc/nginx/sites-available/$longname.conf"
    echo "copying files over container <$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 wordpress $shortname $longname ..."
    lxc exec "$container" -- bash <<EOF
        set -Eeuo pipefail
        if [[ ! -d /var/www/wordpress/$shortname ]]; then
            echo "installing new instance of wordpress into /var/www/wordpress/$shortname"
            mkdir -p /tmp/$shortname
            tar -xzf /var/www/wordpress-latest.tgz -C /tmp/$shortname
            mv /tmp/$shortname/wordpress /var/www/wordpress/$shortname
        else
            echo "instance of wordpress /var/www/wordpress/$shortname already defined!"
        fi

        if [[ ! -f /var/www/wordpress/$shortname/wp-config.php ]]; then
            echo "create wp-config.php"
            cat << 'EOT2' > /var/www/wordpress/$shortname/wp-config.php
<?php

define( 'DB_NAME', '$longname' );
define( 'DB_USER', '$longname' );
define( 'DB_PASSWORD', '$longname' );
define( 'DB_HOST', 'ct1.lxd' );

define( 'DB_CHARSET', 'utf8' );
define( 'DB_COLLATE', '' );

define( 'AUTH_KEY',         '$(genpasswd 20)' );
define( 'SECURE_AUTH_KEY',  '$(genpasswd 20)' );
define( 'LOGGED_IN_KEY',    '$(genpasswd 20)' );
define( 'NONCE_KEY',        '$(genpasswd 20)' );
define( 'AUTH_SALT',        '$(genpasswd 20)' );
define( 'SECURE_AUTH_SALT', '$(genpasswd 20)' );
define( 'LOGGED_IN_SALT',   '$(genpasswd 20)' );
define( 'NONCE_SALT',       '$(genpasswd 20)' );

\$table_prefix = 'wp_';
define( 'WP_DEBUG', false );

/* Add any custom values between this line and the "stop editing" line. */
\$_SERVER['HTTPS'] = 'on';

/* That's all, stop editing! Happy publishing. */

/** Absolute path to the WordPress directory. */
if ( ! defined( 'ABSPATH' ) ) {
	define( 'ABSPATH', __DIR__ . '/' );
}

/** Sets up WordPress vars and included files. */
require_once ABSPATH . 'wp-settings.php';
EOT2

        else
            echo "wp-config.php already defined!"
        fi

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

        echo "enabling wordpress host into nginx"
        mkdir -p /var/log/nginx/$shortname
        ln -sf "/etc/nginx/sites-available/$longname.conf" "/etc/nginx/sites-enabled/$longname.conf"

        echo "reloading nginx"
        nginx -tq && systemctl reload nginx
EOF
    echo "initialize wordpress $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: -- "$@")
# shellcheck disable=SC2181
[[ "$?" -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=$2
        longname="wp-$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

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