#!/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/apache2/sites-enabled/$longname.conf | cut -d' ' -f2")

    [[ "$usedport" == "$port" ]]
}

function check_service_running() {
    lxc exec "$container" -- bash -c "systemctl is-active --quiet apache2.service"
}

function check_config_defined() {
    lxc exec "$container" -- bash -c "test -f /var/www/cagettepei/$shortname/config.xml"
}

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

function _create() {
    echo "creating CagettePéi instance for <$shortname> ... "

    mkdir -p "$MIAOU_CONFIGDIR/apps/cagettepei"
    APP_PORT=$port APP_NAME=$shortname tera -e --env-key env -t "$MIAOU_BASEDIR/templates/apps/cagettepei/cagettepei-host.j2" -o "$MIAOU_CONFIGDIR/apps/cagettepei/$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/cagettepei/$longname.conf" "$container/etc/apache2/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"
        DB_INIT=true
    else
        echo "database already exists!"
        DB_INIT=false
    fi

    credential_username=$(load_yaml_from_expanded credential.username)
    credential_email=$(load_yaml_from_expanded credential.email)

    echo "initialize cagettepei $shortname $longname ..."
    lxc exec "$container" -- bash <<EOF
        set -Eeuo pipefail
        if [[ ! -d /var/www/cagettepei/$shortname ]]; then
            echo "installing new instance of cagettepei into /var/www/cagettepei/$shortname"
            cd /tmp
            if [[ -d cagettepei ]]; then
                echo "refreshing previous clone"
                cd cagettepei
                git pull
                cd ..
            else
                echo "cloning"
                git clone https://git.artcode.re/cagetters/cagettepei.git
            fi
            cp -r cagettepei /var/www/cagettepei/$shortname
            cd /var/www/cagettepei/$shortname
            echo COMPILING...
            export HAXE_STD_PATH=/opt/haxe_20180221160843_bb7b827/std
            haxelib setup .haxelib
            make install ENV=dev
            echo OK
        else
            echo "instance of cagettepei /var/www/cagettepei/$shortname already defined!"
        fi

        if diff -q /var/www/cagettepei/$shortname/config.xml /var/www/cagettepei/$shortname/config.xml.dist; then
            echo "create config.xml"
            cat << 'EOT2' > /var/www/cagettepei/$shortname/config.xml
<config
	database="mysql://cagettepei-$shortname:cagettepei-$shortname@ct1.lxd/cagettepei-$shortname"

	host="$fqdn"
	name = "$shortname"
	default_email = "postmaster@artcode.re"
	webmaster_email = "postmaster@artcode.re"

	key="carotteMagique"

	lang="fr"
	langs="fr"
  	langnames="Français"
	sqllog="0"
	debug="0"
	cache="0"
	maintain="0"
	cachetpl="0"
/>
EOT2
        else
            echo "config.xml already defined!"
        fi

        a2ensite $longname.conf
        mkdir -p /var/log/apache2/cagettepei/$shortname
        systemctl restart apache2

        if [[ $DB_INIT == true ]]; then
            echo "Force TABLES initialization"
            curl localhost:$port
            echo "Set administrator password..."
            echo "insert into User values (1,'fr','c3513c793b13471f3a49bdb22acb66de',1,'$credential_username','Admin', '$credential_email', null, null, null, null, null, null, null, null, null, now(), now(),6,null, null);" | mariadb cagettepei-$shortname -u cagettepei-$shortname -pcagettepei-$shortname -h ct1.lxd
            echo "TODO: password \`cagette\` should be changed soon!!!"
        fi
EOF
    echo "initialize cagettepei $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"
fqdn="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=$2
        longname="cagettepei-$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 &&
    "$container" != unset &&
    "$fqdn" != unset &&
    "$shortname" != unset ]] || usage

. "$MIAOU_BASEDIR/lib/init.sh"

$action