package dalclient;

import java.io.*;


/**
 * Call a cone search service and return the results as a VOTable.
 *
 * Usage:	cone3 ra dec sr [fname [serviceURL]]
 *
 * Or call with no args for the built-in unit test.
 */
public class cone3 {
    // Default query params if none specified on cmdline (for unit test).
    private static final String DEF_SERVICE =
	"http://chart.stsci.edu/GSCVO/GSC22VO.jsp?";
    private static final double DEF_RA=12.0, DEF_DEC=12.0, DEF_SR=0.1;
    private static final String FNAME = "cone3.xml";

    public static void main(String args[]) throws Exception {
	String service = DEF_SERVICE, fname = FNAME;
	double ra=DEF_RA, dec=DEF_DEC, sr=DEF_SR;
	int arg = 0;

	if (args.length == 0) {
	    // Built-in no-args unit test.
	} else if (args.length >= 3) {
	    ra = Double.parseDouble(args[arg++]);
	    dec = Double.parseDouble(args[arg++]);
	    sr = Double.parseDouble(args[arg++]);
	    fname = (arg < args.length) ? args[arg++] : "cone3.out"; 
	    if (arg < args.length) 
		service = args[arg++];
	} else {
	    System.out.println("Usage: cone3 ra dec sr [fname [coneURL]]");
	    System.exit(1);
	}

	callConeService(service, ra, dec, sr, fname);
    }

    /* Simple test routine to call a cone search service and summarize results.
     */
    static void callConeService(String service,
	    double ra, double dec, double sr, String fname) throws Exception {

	// Get a new connection to the service.
	ConeConnection cone = new ConeConnection(service);

	// Form the query.
	ConeQuery query = cone.getConeQuery(ra, dec, sr);

	// Execute the query.
	System.out.println("# Query: " + query.getQueryString(0));
	InputStream in = query.executeRaw();

	// Copy the query result VOTable to the name output file, overwriting
	// it if the file already exists.

	System.out.println("# copying query result VOTable to file " + fname);
	File file = new File(fname);  file.delete();
	FileOutputStream out = new FileOutputStream(file);

	byte buf[] = new byte[4096];  int n;
	while ((n = in.read(buf, 0, buf.length)) > 0)
	    out.write(buf, 0, n);
    }
}