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package org.netbeans.modules.profiler.oql.language;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import javax.swing.text.BadLocationException;
import javax.swing.text.JTextComponent;
import org.netbeans.api.editor.completion.Completion;
import org.netbeans.editor.BaseDocument;
import org.netbeans.spi.editor.completion.CompletionItem;
import org.netbeans.spi.editor.completion.CompletionTask;
import org.netbeans.spi.editor.completion.support.CompletionUtilities;

/**
 *
 * @author Jaroslav Bachorik
 */
public class KeywordCompletionItem implements CompletionItem {
    final private String text;
    final private String sortPrefix;
    final private int caret;
    final private int correction;

    final private static Color fieldColor = Color.decode("0x0000B2");

    public KeywordCompletionItem(String sortPrefix, String text, int caretOffset) {
        this(sortPrefix, text, caretOffset, 0);
    }

    public KeywordCompletionItem(String sortPrefix, String text, int caretOffset, int correction) {
        this.text = text;
        this.caret = caretOffset;
        this.correction = correction >= 0 ? correction : 0;
        this.sortPrefix = sortPrefix;
    }

    public CompletionTask createDocumentationTask() {
        return null;
    }

    public CompletionTask createToolTipTask() {
        return null;
    }

    public void defaultAction(JTextComponent component) {
        final BaseDocument doc = (BaseDocument) component.getDocument();
        doc.runAtomicAsUser(new Runnable() {

            @Override
            public void run() {
                try {
                    if (caret > doc.getLength()) {
                        doc.insertString(caret - 1, text.substring(correction), null);
                    } else {
                        doc.insertString(caret, text.substring(correction), null);
                    }
                } catch (BadLocationException ex) {
                    // shouldn't happen
                }
            }
        });
        //This statement will close the code completion box:
        Completion.get().hideAll();

    }

    public CharSequence getInsertPrefix() {
        return text;
    }

    public int getPreferredWidth(Graphics g, Font defaultFont) {
        return CompletionUtilities.getPreferredWidth(text, null, g, defaultFont);
    }

    public int getSortPriority() {
        return 0;
    }

    public CharSequence getSortText() {
        return sortPrefix + "_" + text;
    }

    public boolean instantSubstitution(JTextComponent component) {
        defaultAction(component);
        return true;
    }

    public void processKeyEvent(KeyEvent evt) {
        
    }

    public void render(Graphics g, Font defaultFont, Color defaultColor, Color backgroundColor, int width, int height, boolean selected) {
        CompletionUtilities.renderHtml(null, text, null, g, defaultFont, (selected ? Color.white : fieldColor), width, height, selected);
    }

}
