# lib/podman_exporter
# Functions to control the installation and configuration of podman_exporter

# Save trace setting
_XTRACE_PODMAN_EXPORTER=$(set +o | grep xtrace)
set +o xtrace

PODMAN_EXPORTER_BINARY="/usr/local/bin/prometheus-podman-exporter"
PODMAN_EXPORTER_SYSTEMD_SERVICE="devstack@podman-exporter.service"
PODMAN_EXPORTER_PORT=${PODMAN_EXPORTER_PORT:-9882}
PE_REPO=${PE_REPO:-https://github.com/containers/prometheus-podman-exporter.git}
PE_REPO_NAME=${PE_REPO_NAME:-prometheus-podman-exporter}

function pre_install_podman_exporter {
    # Install OS packages
    install_package libgpgme-dev libassuan-dev libbtrfs-dev libdevmapper-dev pkg-config build-essential golang podman uidmap netavark
}

function install_podman_exporter {

    # Clone prometheus-podman-exporter
    PE_DIR=$DEST/$PE_REPO_NAME
    git_timed clone $PE_REPO $PE_DIR

    # Generate Binary
    cd $PE_DIR
    make binary

    # Move binaries to /usr/local/bin
    sudo mv $PE_DIR/bin/prometheus-podman-exporter /usr/local/bin/

    # Set ownership
    sudo chown $(whoami):$(whoami) ${NODE_EXPORTER_BINARY}
}

function init_podman_exporter {

    podman_exporter_cmd=${PODMAN_EXPORTER_BINARY}
    podman_exporter_cmd+=" --collector.enable-all"

    write_user_unit_file $PODMAN_EXPORTER_SYSTEMD_SERVICE "$podman_exporter_cmd" "" "$STACK_USER"

    enable_service $PODMAN_EXPORTER_SYSTEMD_SERVICE
}

function start_podman_exporter {
    start_service $PODMAN_EXPORTER_SYSTEMD_SERVICE
}

function stop_podman_exporter {
    stop_service $PODMAN_EXPORTER_SYSTEMD_SERVICE
}

function cleanup_podman_exporter {
    stop_podman_exporter
    disable_service $PODMAN_EXPORTER_SYSTEMD_SERVICE

    # Remove systemd unit files
    local unitfile="$SYSTEMD_DIR/$PODMAN_EXPORTER_SYSTEMD_SERVICE"
    sudo rm -f $unitfile
    $SYSTEMCTL daemon-reload

    # Remove Node Exporter binaries
    sudo rm -rf $PODMAN_EXPORTER_BINARY
}

function wait_for_podman_data {
    # Adding sleep time so that metrics is pushed by podman exporter
    sleep 60
}

function check_data_podman_exporter {
    if curl -s --head  --request  GET "http://$HOST_IP:$PODMAN_EXPORTER_PORT/metrics" | grep "200 OK" > /dev/null; then
        echo "#### Metrics data ####"
        curl "http://$HOST_IP:$PODMAN_EXPORTER_PORT/metrics"
    else
        die $LINENO "Couldn't get data from podman_exporter"
    fi
}

# Restore xtrace
$_XTRACE_PODMAN_EXPORTER