EDIT

/**

* Copyright (C) 2014 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.view.search.specimen;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.util.ArrayList;

import org.eclipse.equinox.internal.p2.ui.misc.StringMatcher;

import org.eclipse.jface.fieldassist.ComboContentAdapter;

import org.eclipse.jface.fieldassist.ContentProposalAdapter;

import org.eclipse.jface.fieldassist.IContentProposal;

import org.eclipse.jface.fieldassist.IContentProposalProvider;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.DisposeEvent;

import org.eclipse.swt.events.DisposeListener;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Label;

import org.eclipse.ui.forms.widgets.FormToolkit;

import org.eclipse.ui.forms.widgets.TableWrapData;

import org.eclipse.ui.forms.widgets.TableWrapLayout;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

/**

 * @author pplitzner

 * @date 22.05.2014

 *

 */

public class SpecimenProviderSelectionComposite extends Composite {

    private final FormToolkit toolkit = new FormToolkit(Display.getCurrent());

    private final Combo txtAccessPoint;

    private final Button btnGbif;

    private final Button btnBioCaseProvider;

    private final Label lblAccessPointUrl;

    private String[] items;

    /**

     * Create the composite.

     * @param parent

     * @param style

     */

    public SpecimenProviderSelectionComposite(Composite parent, int style) {

        super(parent, style);

        addDisposeListener(new DisposeListener() {

            @Override

            public void widgetDisposed(DisposeEvent e) {

                toolkit.dispose();

            }

        });

        toolkit.adapt(this);

        toolkit.paintBordersFor(this);

        {

            TableWrapLayout tableWrapLayout = new TableWrapLayout();

            tableWrapLayout.numColumns = 2;

            setLayout(tableWrapLayout);

        }

        btnGbif = new Button(this, SWT.RADIO);

        toolkit.adapt(btnGbif, true, true);

        btnGbif.setText("GBIF");

        new Label(this, SWT.NONE);

        btnBioCaseProvider = new Button(this, SWT.RADIO);

        toolkit.adapt(btnBioCaseProvider, true, true);

        btnBioCaseProvider.setText("BioCASE Provider");

//        txtAccessPoint = new Combo(this, SWT.BORDER);

//        CdmPreference biocaseProvider = PreferencesUtil.getPreferenceFromDB(PreferencePredicate.BioCaseProvider);

//        if (biocaseProvider != null){

//            String items[] = biocaseProvider.getValue().split(";");

//            txtAccessPoint.setItems(items);

//        }

        txtAccessPoint = new Combo(this, SWT.BORDER);

        URL url;

        String response = null;

        try {

            url = new URL("http://www.biocase.org/whats_biocase/gbif_biocase.cgi");

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setRequestProperty("Accept", "application/json");

    //        conn.setConnectTimeout(TIMEOUT*9);

    //        conn.setReadTimeout(TIMEOUT*9);

            if (conn.getResponseCode() != 200) {

                throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());

            }

            BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));

            StringBuilder  builder = new StringBuilder();

            String line;

            while ((line = br.readLine()) != null) {

                builder.append(line);

            }

            conn.disconnect();

            response = builder.toString();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        JSONArray jsonResponseArray;

        try {

            jsonResponseArray =new JSONArray(response);

            int i = 0;

            String service_url = null;

            items = new String[jsonResponseArray.length()];

            while (i<jsonResponseArray.length()){

                JSONObject object = jsonResponseArray.getJSONObject(i);

                service_url = (String) object.get("service_url");

                if (service_url != null){

                    txtAccessPoint.add(service_url);

                    items[i] = service_url;

                }

                i++;

            }

        } catch (JSONException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        GridData dataProviderUri = new GridData();

        dataProviderUri.horizontalAlignment = GridData.FILL;

        dataProviderUri.horizontalSpan = 3;

        txtAccessPoint.setLayoutData(dataProviderUri);

      //  providerURI.setVisible(false);

        ContentProposalAdapter adapter = new ContentProposalAdapter(txtAccessPoint, new ComboContentAdapter(), getProposalProvider(), null, null);

        adapter.setPropagateKeys(true);

        adapter.setProposalAcceptanceStyle(ContentProposalAdapter.PROPOSAL_REPLACE);

//        String[] proposals = new String[providerURI.getItems().length];

        txtAccessPoint.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB, TableWrapData.TOP, 1, 1));

        toolkit.adapt(txtAccessPoint, true, true);

        lblAccessPointUrl = new Label(this, SWT.NONE);

        lblAccessPointUrl.setLayoutData(new TableWrapData(TableWrapData.LEFT, TableWrapData.MIDDLE, 1, 1));

        toolkit.adapt(lblAccessPointUrl, true, true);

        lblAccessPointUrl.setText("Access Point URL");

    }

    public Button getBtnGbif() {

        return btnGbif;

    }

    public Button getBtnBioCaseProvider() {

        return btnBioCaseProvider;

    }

    public Combo getTxtAccessPoint() {

        return txtAccessPoint;

    }

    public Label getLblAccessPointUrl() {

        return lblAccessPointUrl;

    }

    /**

     * @return

     */

    IContentProposalProvider getProposalProvider() {

        return new IContentProposalProvider() {

            @Override

            public IContentProposal[] getProposals(String contents, int position) {

                //String[] items = getStringItems();

                if (contents.length() == 0 || items.length == 0) {

                    return new IContentProposal[0];

                }

                StringMatcher matcher = new StringMatcher("*" + contents + "*", true, false); //$NON-NLS-1$ //$NON-NLS-2$

                ArrayList<String> matches = new ArrayList<String>();

                for (int i = 0; i < items.length; i++) {

                    if (matcher.match(items[i])) {

                        matches.add(items[i]);

                    }

                }

                // We don't want to autoactivate if the only proposal exactly matches

                // what is in the combo.  This prevents the popup from

                // opening when the user is merely scrolling through the combo values or

                // has accepted a combo value.

                if (matches.size() == 1 && matches.get(0).equals(txtAccessPoint.getText())) {

                    return new IContentProposal[0];

                }

                if (matches.isEmpty()) {

                    return new IContentProposal[0];

                }

                // Make the proposals

                IContentProposal[] proposals = new IContentProposal[matches.size()];

                for (int i = 0; i < matches.size(); i++) {

                    final String proposal = matches.get(i);

                    proposals[i] = new IContentProposal() {

                        @Override

                        public String getContent() {

                            return proposal;

                        }

                        @Override

                        public int getCursorPosition() {

                            return proposal.length();

                        }

                        @Override

                        public String getDescription() {

                            return null;

                        }

                        @Override

                        public String getLabel() {

                            return null;

                        }

                    };

                }

                return proposals;

            }

        };

    }

}