package m.prms.model;

import csip.Executable;
import csip.ModelDataService;
import csip.ServiceException;
import csip.annotations.*;
import static csip.annotations.ResourceType.*;
import javax.ws.rs.Path;
import org.apache.commons.io.FileUtils;
import static m.prms.model.V5_0.PRMS_EXE;

/**
 * PRMS Service. Execution of the original PRMS model.
 *
 * @author od
 */
@Name("PRMS")
@Description("Precipitation Runoff Modeling System.")
@State(State.UNSTABLE)
@Author(org = "USGS")
@Author(org = "CSU")
@Category("Hydrology")
@Path("m/prms/5.0")
@Polling(first = 5000, next = 2000)
@Resource(type = EXECUTABLE, file = "/bin/lin-amd64/prms-5.0", id = PRMS_EXE)
@Resource(type = OUTPUT, file = "*-stdout.txt *-stderr.txt recharge.* output/*")
public class V5_0 extends ModelDataService {

    static final String PARM_CONTROL_FILE = "controlfile";
    static final String PRMS_EXE = "prms";


    @Override
    protected void doProcess() throws Exception {

        if (!hasParam(PARM_CONTROL_FILE)) {
            throw new ServiceException("Missing parameter: " + PARM_CONTROL_FILE);
        }
        Executable e = getResourceExe(PRMS_EXE);
        e.setArguments(getStringParam(PARM_CONTROL_FILE));
        if (0 != e.exec()) {
            throw new ServiceException("Error executing prms: " + FileUtils.readFileToString(e.stderr()));
        }
    }
}