/*
 * Copyright (c) 2008-2019 Emmanuel Dupuy.
 * This project is distributed under the GPLv3 license.
 * This is a Copyleft license that gives the user the right to use,
 * copy and modify the code freely for non-commercial purposes.
 */

package org.jd.gui.view.component;

import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
import org.jd.gui.api.API;
import org.jd.gui.api.feature.IndexesChangeListener;
import org.jd.gui.api.feature.UriGettable;
import org.jd.gui.api.model.Container;
import org.jd.gui.api.model.Indexes;
import org.jd.gui.util.exception.ExceptionUtil;
import org.jd.gui.util.index.IndexesUtil;
import org.jd.gui.util.io.TextReader;

import java.awt.*;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Future;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class XmlFilePage extends TypeReferencePage implements UriGettable, IndexesChangeListener {
    protected API api;
    protected Container.Entry entry;
    protected Collection<Future<Indexes>> collectionOfFutureIndexes;

    public XmlFilePage(API api, Container.Entry entry) {
        this.api = api;
        this.entry = entry;
        // Load content file
        String text = TextReader.getText(entry.getInputStream());
        // Create hyperlinks
        Pattern pattern = Pattern.compile("(?s)<\\s*bean[^<]+class\\s*=\\s*\"([^\"]*)\"");
        Matcher matcher = pattern.matcher(textArea.getText());

        while (matcher.find()) {
            // Spring type reference found
            String value = matcher.group(1);
            String trim = value.trim();

            if (trim != null) {
                int startIndex = matcher.start(1) - 1;
                int endIndex = startIndex + value.length() + 2;
                String internalTypeName = trim.replace('.', '/');
                addHyperlink(new TypeHyperlinkData(startIndex, endIndex, internalTypeName));
            }
        }
        // Display
        setText(text);
    }

    public String getSyntaxStyle() { return SyntaxConstants.SYNTAX_STYLE_XML; }

    protected boolean isHyperlinkEnabled(HyperlinkData hyperlinkData) { return ((TypeHyperlinkData)hyperlinkData).enabled; }

    protected void openHyperlink(int x, int y, HyperlinkData hyperlinkData) {
        TypeHyperlinkData data = (TypeHyperlinkData)hyperlinkData;

        if (data.enabled) {
            try {
                // Save current position in history
                Point location = textArea.getLocationOnScreen();
                int offset = textArea.viewToModel(new Point(x-location.x, y-location.y));
                URI uri = entry.getUri();
                api.addURI(new URI(uri.getScheme(), uri.getAuthority(), uri.getPath(), "position=" + offset, null));

                // Open link
                String internalTypeName = data.internalTypeName;
                List<Container.Entry> entries = IndexesUtil.findInternalTypeName(collectionOfFutureIndexes, internalTypeName);
                String rootUri = entry.getContainer().getRoot().getUri().toString();
                ArrayList<Container.Entry> sameContainerEntries = new ArrayList<>();

                for (Container.Entry entry : entries) {
                    if (entry.getUri().toString().startsWith(rootUri)) {
                        sameContainerEntries.add(entry);
                    }
                }

                if (sameContainerEntries.size() > 0) {
                    api.openURI(x, y, sameContainerEntries, null, data.internalTypeName);
                } else if (entries.size() > 0) {
                    api.openURI(x, y, entries, null, data.internalTypeName);
                }
            } catch (URISyntaxException e) {
                assert ExceptionUtil.printStackTrace(e);
            }
        }
    }

    // --- UriGettable --- //
    public URI getUri() { return entry.getUri(); }

    // --- ContentSavable --- //
    public String getFileName() {
        String path = entry.getPath();
        int index = path.lastIndexOf('/');
        return path.substring(index+1);
    }

    // --- IndexesChangeListener --- //
    public void indexesChanged(Collection<Future<Indexes>> collectionOfFutureIndexes) {
        // Update the list of containers
        this.collectionOfFutureIndexes = collectionOfFutureIndexes;
        // Refresh links
        boolean refresh = false;

        for (Map.Entry<Integer, HyperlinkData> entry : hyperlinks.entrySet()) {
            TypeHyperlinkData data = (TypeHyperlinkData)entry.getValue();
            String internalTypeName = data.internalTypeName;
            boolean enabled = IndexesUtil.containsInternalTypeName(collectionOfFutureIndexes, internalTypeName);

            if (data.enabled != enabled) {
                data.enabled = enabled;
                refresh = true;
            }
        }

        if (refresh) {
            textArea.repaint();
        }
    }
}