//! C-ITS CAM Evaluation

use c_its_parser::standards::cam_1_4_1::cam_pdu_descriptions::{self, HighFrequencyContainer};
use log::info;

pub fn handle_cam(etsi: &cam_pdu_descriptions::CAM) {
    // only POC output
    match &etsi.cam.cam_parameters.high_frequency_container {
        HighFrequencyContainer::basicVehicleContainerHighFrequency(obu) => {
            let station_id = etsi.header.station_id.0;
            let lat_deg = etsi
                .cam
                .cam_parameters
                .basic_container
                .reference_position
                .latitude
                .as_deg();
            let lon_deg = etsi
                .cam
                .cam_parameters
                .basic_container
                .reference_position
                .longitude
                .as_deg();

            if obu.speed.speed_value.is_unavailable() {
                info!(
                    "Got CAM from {station_id} at {lat_deg:.3}°N, {lon_deg:.3}°E, speed unavailable",
                );
            } else {
                info!(
                    "Got CAM from {station_id} at {lat_deg:.3}°N, {lon_deg:.3}°E, speed {:.2} km/h",
                    obu.speed.speed_value.as_kmh()
                );
            }
        }
        HighFrequencyContainer::rsuContainerHighFrequency(rsu) => {
            info!(
                "Got RSU from {} at {:.3}°N, {:.3}°E, {} protected zones",
                etsi.header.station_id.0,
                etsi.cam
                    .cam_parameters
                    .basic_container
                    .reference_position
                    .latitude
                    .as_deg(),
                etsi.cam
                    .cam_parameters
                    .basic_container
                    .reference_position
                    .longitude
                    .as_deg(),
                rsu.protected_communication_zones_rsu
                    .as_ref()
                    .map(|d| d.0.len())
                    .unwrap_or_default()
            );
        }

        _ => {
            // enum is non-exhaustive, so we need a default case
            // but this should never be reached in pactical applications
        }
    }
}