function print_help {
    echo "Usage: `basename $0` command [options]"
    echo ""
    echo "Commands:"
    echo "  status [site]    return status information about site configurations"
    echo "  init <site>      initialize site structure"
    echo "  update <site>    update to new version"
    echo ""
}

function clear_redis_cache {
    echo "running redis FLUSHDB ..."
    echo "FLUSHDB" | redis-cli -h 127.0.0.1 -p $REDIS_PORT -a "$REDIS_PASSWORD"
    echo "running redis FLUSHALL ..."
    echo "FLUSHALL" | redis-cli -h 127.0.0.1 -p $REDIS_PORT -a "$REDIS_PASSWORD"
}

function clear_orm_cache {
    echo "clearing doctrine metadata"
    php artisan doctrine:clear:metadata:cache
    echo "clearing doctrine query cache"
    php artisan doctrine:clear:query:cache
    echo "clearing doctrine result cache"
    php artisan doctrine:clear:result:cache
    echo "generating doctrine proxies"
    php artisan doctrine:generate:proxies
}

function clear_laravel_cache {
    php artisan route:clear
    php artisan route:cache
    php artisan config:cache
    php artisan view:clear
    php artisan view:cache
}

function check_laravel_storage_structure {
    # check for new storage structure ( LV 5.x)
    if [[ ! -d $SITE_ROOT/storage/framework ]]; then
        mkdir -p $SITE_ROOT/storage/framework
        mkdir -p $SITE_ROOT/storage/framework/cache
        mkdir -p $SITE_ROOT/storage/framework/views
        mkdir -p $SITE_ROOT/storage/framework/sessions
    fi
    if [[ ! -d $SITE_ROOT/storage/app ]]; then
        mkdir -p $SITE_ROOT/storage/app
        mkdir -p $SITE_ROOT/storage/app/public
    fi
    if [[ ! -d $SITE_ROOT/storage/logs ]]; then
        mkdir -p $SITE_ROOT/storage/logs
    fi
}

function set_laravel_storage_permissions {
    chown -R $FILE_OWNER:$FILE_GROUP $SITE_ROOT/storage
    chmod 02770 $SITE_ROOT/storage;
    find $SITE_ROOT/storage/ -type d -exec chmod 0775 {} \;
    find $SITE_ROOT/storage/ -type f -exec chmod 0664 {} \;
    # set html purifier cache permission
    chmod 0770 vendor/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/Serializer
}

function set_python_venv {
    chmod 0775 $target_dir/app/Console/Commands/SpammerProcess
    chown :www-data $target_dir/app/Console/Commands/SpammerProcess
    cd $target_dir/app/Console/Commands/SpammerProcess
    python3 -m venv env
    source env/bin/activate
    pip install  "pip==20.3.4"
    pip install --upgrade setuptools
    pip install wheel
    pip install -r requirements.txt
    deactivate
    cd $target_dir
}

function site_init {
    if [ ! $1 ]; then
        echo "ERROR: site parameter mandatory"
        exit 1
    fi
    CONF_PATH="$CONF_DIR/conf.d/$1.conf"
    if [ ! -f $CONF_PATH ]; then
        echo "Site configuration not found: " $1
        exit 1
    fi
    source $CONF_PATH
    if [ -f "$SITE_ROOT/w/public/index.php" ]; then
        echo "Cannot override an existing deployment: $SITE_ROOT/w"
        exit 1
    fi
    # cleanup previous broken deployment
    rm -rf $SITE_ROOT/slot0
    # create directory structure
    for dir in slot0 slot1; do
        mkdir -p $SITE_ROOT/$dir
        chown $FILE_OWNER:$FILE_GROUP $SITE_ROOT/$dir
    done
    target_dir="$SITE_ROOT/slot0"
    # fetch catalog and write actual version
    fetch_catalog
    RELEASE_VERSION=`catalog_get_version`
    echo $RELEASE_VERSION > $SITE_ROOT/slot0/release
    # fetch and extract release tarball
    umask 0027
    if [[ $SOURCE_TARBALL == http* ]]; then
        echo "Download from http!"
        curl $SOURCE_TARBALL | tar -xzv -C $target_dir --strip-components 1 --no-same-permissions
    else
        echo "extract from local file system"
        if [ ! -f $SOURCE_TARBALL ]; then
            echo "Source tarball not found: $SOURCE_TARBALL"
            exit 1
        fi
        tar -xzvf $SOURCE_TARBALL -C $target_dir --strip-components 1 --no-same-permissions
    fi
    chown -R $FILE_OWNER:$FILE_GROUP $target_dir
    umask 0022
    # link configuration files managed by puppet

    ln -sf /etc/openstackid/.env $target_dir/.env

    # convert app/storage into symlink and set permissions
    mv $target_dir/storage $SITE_ROOT/

    # link shared app/storage directory
    rm -rf $target_dir/storage
    ln -s $SITE_ROOT/storage $target_dir
    check_laravel_storage_structure

    # set artisan execution permissions
    cd $target_dir && chmod 0770 artisan

    clear_redis_cache

    clear_orm_cache

    clear_laravel_cache

    echo "running db migrations";
    php artisan doctrine:migrations:migrate --connection=model --force --env=$LARAVEL_ENV

    if [[ $USE_DB_SEEDING -eq 1 ]]; then
        php artisan db:seed --env=$LARAVEL_ENV --force
    fi

    sudo npm install
    sudo npm run build

    set_laravel_storage_permissions

    set_python_venv

    # activate site
    rm -rf $SITE_ROOT/w
    ln -s $SITE_ROOT/slot0 $SITE_ROOT/w

    echo "Restarting laravel queue worker ..."
    php artisan queue:restart

    echo "supervisorctl reload"
    supervisorctl reload

}

function site_status {
    if [ ! $1 ]; then
        echo "ERROR: site parameter mandatory"
        exit 1
    fi
    CONF_PATH="$CONF_DIR/conf.d/$1.conf"
    if [ ! -f $CONF_PATH ]; then
        echo "Site configuration not found: $1"
        exit 0
    fi
    source $CONF_PATH
    if [ ! -f "$SITE_ROOT/w/public/index.php" ]; then
        if [ -d "$SITE_ROOT/slot0" ]; then
            echo "PENDING"
        else
            echo "N/A"
            exit 1
        fi
    else
        fetch_catalog
        REMOTE_VERSION=`catalog_get_version`
        RELEASE_VERSION=$(head -n 1 $SITE_ROOT/w/release)
        if [ "$REMOTE_VERSION" == "$RELEASE_VERSION" ]; then
            echo "INSTALLED [$RELEASE_VERSION]"
        else
            echo "UPDATE AVAILABLE [$RELEASE_VERSION-$REMOTE_VERSION]"
        fi
    fi
}

function fetch_catalog {
    curl --silent $SOURCE_ROOT > $SITE_ROOT/releases.lst
    grep -q "^<!DOCTYPE HTML PUBLIC" $SITE_ROOT/releases.lst
}

function catalog_get_version {
    RAW_LINE=`cat $SITE_ROOT/releases.lst | grep "$RELEASE_NAME" | sed "s/<[^>]\+>//g" | sed -r "s/^$RELEASE_NAME//"`
    RELEASE_DATE=`echo $RAW_LINE | awk '{ print $1 " " $2}'`
    echo $RELEASE_DATE
}

function site_update {
    if [ ! $1 ]; then
        echo "ERROR: missing site parameter"
        exit 1
    fi
    CONF_PATH="$CONF_DIR/conf.d/$1.conf"
    if [ ! -f $CONF_PATH ]; then
        echo "Site configuration not found: $1"
        exit 0
    fi
    source $CONF_PATH
    SITE_LINK=`readlink -f $SITE_ROOT/w`
    ACTIVE_SLOT=`basename $SITE_LINK`
    case $ACTIVE_SLOT in
        slot0)
            TARGET_SLOT='slot1'
            ;;
        slot1)
            TARGET_SLOT='slot0'
            ;;
        *)
            echo "Invalid active slot"
            exit 1
    esac
    echo "Target slot: $TARGET_SLOT"
    target_dir="$SITE_ROOT/$TARGET_SLOT"
    rm -rf $target_dir
    mkdir $target_dir
    # fetch catalog and write actual version
    fetch_catalog
    RELEASE_VERSION=`catalog_get_version`
    echo $RELEASE_VERSION > $target_dir/release
    # fetch and extract release tarball
    umask 0027
    if [[ $SOURCE_TARBALL == http* ]]; then
        echo "Download from http!"
        curl $SOURCE_TARBALL | tar -xzv -C $target_dir --strip-components 1 --no-same-permissions
    else
        echo "extract from local file system"
        if [ ! -f $SOURCE_TARBALL ]; then
            echo "Source tarball not found: $SOURCE_TARBALL"
            exit 1
        fi
        tar -xzvf $SOURCE_TARBALL -C $target_dir --strip-components 1 --no-same-permissions
    fi

    chown -R $FILE_OWNER:$FILE_GROUP $target_dir
    umask 0022

    # link configuration files managed by puppet
    ln -sf /etc/openstackid/.env $target_dir/.env
    # link shared app/storage directory
    rm -rf $target_dir/storage
    ln -s $SITE_ROOT/storage $target_dir
    check_laravel_storage_structure
    # set artisan exec permissions
    cd $target_dir
    chmod 0770 artisan

    clear_redis_cache

    clear_orm_cache

    clear_laravel_cache

    echo "running db migrations"
    php artisan doctrine:migrations:migrate --connection=model --force --env=$LARAVEL_ENV

    sudo npm install
    sudo npm run build

    set_laravel_storage_permissions

    set_python_venv

    # activate site
    rm -rf $SITE_ROOT/w
    ln -s $target_dir $SITE_ROOT/w
    # to reset op cache
    /usr/sbin/service $PHP_SERVICE_NAME restart

    echo "Restarting laravel queue worker ..."
    php artisan queue:restart

    echo "supervisorctl reload"
    supervisorctl reload
}