/*
 * Created on 25 janv. 2004
 *
 * (c)2004 Jérôme Nègre - http://www.jnegre.org/
 */

package net.sourceforge.phpeclipse.news.search;

import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Vector;

import net.sourceforge.phpeclipse.news.Channel;

import org.apache.xmlrpc.XmlRpcClient;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

/**
 * @author Jérôme Nègre
 *
 */
public class SearchDialog extends Dialog {

    private Label statusBar;
    private Text searchText;
    private List list;
    private Text name;
    private Text siteUrl;
    private Text feedUrl;
    private Text version;
    private Text description;
    
    private ArrayList resultChannels = new ArrayList();
    
    private XmlRpcClient xmlRpcClient;
    
    /**
     * @param parentShell
     */
    public SearchDialog(Shell parentShell) {
        super(parentShell);
        this.setShellStyle(SWT.DIALOG_TRIM | SWT.RESIZE | SWT.MODELESS);
    }

    protected void configureShell(Shell newShell) {
        super.configureShell(newShell);
        newShell.setText("Search using http://www.syndic8.com/");
    }

    /**
     * Adds the controls to the dialog
     * @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite)
     */
    protected Control createDialogArea(Composite parent) {
        Composite composite = (Composite)super.createDialogArea(parent);
        GridLayout gl = (GridLayout)composite.getLayout();
        gl.numColumns = 4;
        
        //Text to enter the searched words
        searchText = new Text(composite,SWT.BORDER);
        GridData gd = new GridData(GridData.FILL_HORIZONTAL);
        gd.horizontalSpan = 3;
        searchText.setLayoutData(gd);
        //Button "search!"
        Button searchButton = new Button(composite,0);
        searchButton.setText("Search!");
        searchButton.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                //TODO use a worker
            	Cursor waitCursor = new Cursor(SearchDialog.this.getContents().getDisplay(), SWT.CURSOR_WAIT);
                try {
                	SearchDialog.this.getContents().setCursor(waitCursor);
                    SearchDialog.this.searchNow();
                } catch (Exception x) {
                    setStatusMessage("Error: "+x.getMessage());
                } finally {
                	SearchDialog.this.getContents().setCursor(null);
                	waitCursor.dispose();
                }
            }
        });
        //List for the titles of the feeds
        list = new List(composite,SWT.BORDER|SWT.H_SCROLL|SWT.V_SCROLL|SWT.SINGLE);
        gd = new GridData(GridData.FILL_BOTH);
        list.setLayoutData(gd);
        list.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                SearchDialog.this.showFieldDetails((Hashtable)((ArrayList)list.getData()).get(list.getSelectionIndex()));
            }
        });
        
        //Description of the selected feed
        Group group = new Group(composite,0);
        group.setText("Selected Feed");
        gd = new GridData(GridData.FILL_BOTH);
        gd.horizontalSpan = 3;
        group.setLayoutData(gd);
        group.setLayout(new GridLayout(2,false));
        //name
        new Label(group,0).setText("Name:");
        name = new Text(group,SWT.BORDER|SWT.READ_ONLY);
        name.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        //site url
        new Label(group,0).setText("Site URL:");
        siteUrl = new Text(group,SWT.BORDER|SWT.READ_ONLY);
        siteUrl.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        //feed url
        new Label(group,0).setText("Feed URL:");
        feedUrl = new Text(group,SWT.BORDER|SWT.READ_ONLY);
        feedUrl.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        //RSS version
        new Label(group,0).setText("RSS version:");
        version = new Text(group,SWT.BORDER|SWT.READ_ONLY);
        version.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        //description
        new Label(group,0).setText("Description:");
        description = new Text(group,SWT.BORDER|SWT.READ_ONLY|SWT.MULTI|SWT.H_SCROLL|SWT.V_SCROLL|SWT.WRAP);
        description.setLayoutData(new GridData(GridData.FILL_BOTH));

        //status bar
        statusBar = new Label(composite,SWT.NONE);
        gd = new GridData(GridData.FILL_HORIZONTAL);
        gd.horizontalSpan = 4;
        statusBar.setLayoutData(gd);
        setStatusMessage("Ready.");
        return composite;
    }

    private XmlRpcClient getXmlRpcClient() throws MalformedURLException {
        if(this.xmlRpcClient == null) {
            this.xmlRpcClient = new XmlRpcClient("http://www.syndic8.com/xmlrpc.php");
        }
        return this.xmlRpcClient;
    }

    /**
     * 
     */
    protected void searchNow() throws Exception {
      clearFeedList();
      setStatusMessage("Connecting...");
      XmlRpcClient client = getXmlRpcClient();
      //Get the list of ids
      Vector args = new Vector();
      args.add(searchText.getText());
      args.add("sitename");
      //args.add(new Integer(30));
      Vector ids = (Vector)client.execute("syndic8.FindFeeds",args);
      setStatusMessage("Found "+ids.size()+" result(s), asking for details...");
      //Get the descriptions of the feeds
      Vector fields = new Vector();
      fields.add("sitename");
      fields.add("siteurl");
      fields.add("dataurl");
      fields.add("rss_version");
      fields.add("description");
      args.clear();
      args.add(ids);
      args.add(fields);
      Vector infos = (Vector)client.execute("syndic8.GetFeedInfo",args);
      setStatusMessage("Showing details...");
      Iterator iterator = infos.iterator();
      while(iterator.hasNext()) {
          Hashtable info = (Hashtable)iterator.next();
          addFeedInList(info);
      }
      setStatusMessage("Ready.");
    }
    
    protected void clearFeedList() {
        list.removeAll();
        showFieldDetails(null);
        list.setData(new ArrayList());
    }
    
    protected void showFieldDetails(Hashtable info) {
        name.setText(info==null?"":(String)info.get("sitename"));
        siteUrl.setText(info==null?"":(String)info.get("siteurl"));
        feedUrl.setText(info==null?"":(String)info.get("dataurl"));
        version.setText(info==null?"":(String)info.get("rss_version"));
        description.setText(info==null?"":(String)info.get("description"));
    }
    
    protected void addFeedInList(Hashtable info) {
        String name = (String)info.get("sitename");
        String dataurl = (String)info.get("dataurl");
        if("".equals(name) || "".equals(dataurl)) {
            //skip it
            return;
        }
        ArrayList al = (ArrayList)list.getData();
        al.add(info);
        list.add(name);
    }
    
    protected void setStatusMessage(String message) {
        statusBar.setText(message);
        //TODO remove next line
        System.out.println(message);
    }

    protected void createButtonsForButtonBar(Composite parent) {
        createButton(parent,IDialogConstants.OPEN_ID,"Add Selected",false);
        createButton(parent,IDialogConstants.OK_ID,IDialogConstants.OK_LABEL,false);
    }

	protected void buttonPressed(int buttonId) {
		super.buttonPressed(buttonId);
		if(buttonId == IDialogConstants.OPEN_ID) {
			String name = this.name.getText();
			String url = this.feedUrl.getText();
			if(!"".equals(name) && !"".equals(url)) {
				resultChannels.add(new Channel(name, url));
			}
		}
	}
	
	public Channel[] getChannels() {
		return (Channel[])resultChannels.toArray(new Channel[]{});
	}
}