/*
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 * and open the template in the editor.
 */

package org.das2.jythoncompletion;

import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.text.BadLocationException;
import javax.swing.text.JTextComponent;
import org.das2.jythoncompletion.support.CompletionResultSet;
import org.das2.jythoncompletion.support.CompletionTask;
import org.das2.util.monitor.NullProgressMonitor;
import org.autoplot.datasource.DataSetURI;
import org.autoplot.datasource.DataSetURI.CompletionResult;

/**
 *
 * @author jbf
 */
class DataSetUrlCompletionTask implements CompletionTask {

    private static final Logger logger= Logger.getLogger("jython.editor");
    
    JTextComponent editor;
    
    public DataSetUrlCompletionTask(JTextComponent arg1) {
        this.editor= arg1;
    }

    public void cancel() {

    }

    public static String popString( JTextComponent editor, int [] pos ) {
        try {
            int i0 = Utilities.getRowStart(editor, editor.getCaretPosition());
            int i1 = Utilities.getRowEnd(editor, editor.getCaretPosition())-1; // trim end of line
            String line = editor.getText(i0, i1 - i0);
            int ipos = editor.getCaretPosition() - i0;
            i0 = line.lastIndexOf('\'', ipos-1);
            boolean doubleQuotes=false;
            if (i0 == -1) {
                i0 = line.lastIndexOf('\"', ipos-1);
                if ( i0==-1 ) {
                    throw new IllegalArgumentException("expected single quote");
                } else {
                    doubleQuotes= true;
                }
            }
	    i0+=1;
            if ( doubleQuotes ) {
                i1 = line.indexOf('\"', ipos);
            } else {
                i1 = line.indexOf('\'', ipos);
            }
            if (i1 == -1) {
                i1 = line.length();
            }
            pos[0]= i0;
            pos[1]= i1;
            return line.substring(i0,i1);
        } catch ( BadLocationException ex) {
            logger.log(Level.SEVERE, ex.getMessage(), ex);
        } catch (Exception ex) {
            logger.log(Level.SEVERE, ex.getMessage(), ex);
        }
        return null;
    }
    
    public void query( CompletionResultSet arg0 ) {
        try {
            int i0 = Utilities.getRowStart(editor, editor.getCaretPosition());
            int ipos = editor.getCaretPosition() - i0;
            int[] pos= new int[2];
            String surl1 = popString(editor, pos);
            int carotPos = ipos - pos[0];

            List<CompletionResult> rs= DataSetURI.getCompletions( surl1, carotPos, new NullProgressMonitor() );
            
            for ( CompletionResult rs1:rs ) {
                arg0.addItem( new DataSetUrlCompletionItem(rs1) );
            }
        } catch (BadLocationException ex) {
            logger.log(Level.SEVERE, ex.getMessage(), ex);
        } catch (Exception ex) {
            logger.log(Level.SEVERE, ex.getMessage(), ex);
        }
    }

    public void refresh( CompletionResultSet arg0 ) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

}