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package m.ecat;

import csip.ModelDataService;
import csip.ServiceException;
import csip.annotations.*;
import csip.utils.JSONUtils;
import javax.ws.rs.Path;
import static m.Constants.*;
import org.codehaus.jettison.json.JSONArray;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;
import rotation_utils.utils.TranslatorException;

/**
 *
 * @author Brad
 * @author  <a href="mailto:shaun.case@colostate.edu">Shaun Case</a>
 */
@Name("Energy-01: Compute Tillage Energy Consumption Awareness Output")
@Description("This service sums fuel use for each farming operation in a crop rotation, makes any necessary conversion to fuel type, and calculates rotation and crop interval fuel consumption and cost.")
@Path("m/ecat/1.0")

public class V1_0 extends ModelDataService {

    private ECAT ecat;
    private String fuelType;
    private double fuelConversion;

    @Override
    public void preProcess() throws ServiceException, TranslatorException, JSONException, Exception {
        double acres;
        double fuelCost;
        Fuel fuel;
        String warning;

        JSONObject crlmod = getJSONParam(KEY_CRLMOD);
        acres = getDoubleParam(AOA_ACRES);
        fuelCost = getDoubleParam(FUEL_COST);
        fuelType = getStringParam(FUEL_TYPE);

        fuel = new Fuel();
        fuel.setFuelType(fuelType);
        fuel.setCost(fuelCost);
        warning = fuel.getFuelConversion(LOG);
        if (!warning.isEmpty()) {
            setMetainfoWarning(warning);
        }

        ecat = new ECAT();
        ecat.setAcres(acres);
        ecat.setFuel(fuel);

        if (null != crlmod) {
            JSONArray rotations = crlmod.optJSONArray(KEY_ROTATION_FILES);
            if (null != rotations) {
                if (rotations.length() > 0) {
                    JSONObject rotation = rotations.getJSONObject(0).optJSONObject(KEY_ROTATION);
                    if (null != rotation) {
                        ecat.readManagements(rotation); // going to assume 1 rotation for now.  May need to change this later.
                    } else {
                        throw new ServiceException("No rotation JSON object, " + KEY_ROTATION + ", found in the input JSON.");
                    }
                }else{
                    throw new ServiceException("Rotation Files section found that contains no rotations.");
                }
            } else {
                throw new ServiceException("No rotation files JSON object, " + KEY_ROTATION_FILES + ", found in the input JSON.");
            }

        } else {
            throw new ServiceException("No CR_LMOD JSON object, " + KEY_CRLMOD + ", found in the input JSON.");
        }

    }

    @Override
    public void postProcess() throws ECATException {

        this.putResult(TOTAL_FUEL_USAGE, ecat.getTotalFuelUsage(), "Total fuel use for management.", "gallons");
        this.putResult(INTERVAL_FUEL_USAGE, ecat.getIntervalFuelUsage(), "Interval fuel use for crop intervals.", "gallons");
        this.putResult(TOTAL_FUEL_COST, ecat.getTotalFuelCost(), "Total fuel use for management.", "USD");
        this.putResult(INTERVAL_FUEL_COST, ecat.getIntervalFuelCost(), "Interval fuel use for crop intervals.", "USD");
    }
}