import java.net.MalformedURLException;

import net.yacy.cora.document.ASCII;
import net.yacy.cora.protocol.RequestHeader;
import net.yacy.kelondro.data.meta.DigestURI;
import net.yacy.kelondro.data.meta.URIMetadata;
import net.yacy.kelondro.data.word.Word;
import net.yacy.search.Switchboard;
import net.yacy.search.index.Segment;
import net.yacy.server.serverObjects;
import net.yacy.server.serverSwitch;

public class HostBrowser {

    public static serverObjects respond(@SuppressWarnings("unused") final RequestHeader header, final serverObjects post, final serverSwitch env) {
        // return variable that accumulates replacements
        final Switchboard sb = (Switchboard) env;

        final serverObjects prop = new serverObjects();

        Segment segment = sb.index;

        // set default values
        prop.put("urlstring", "");
        prop.put("urlhash", "");
        prop.put("result", "");
        prop.putNum("ucount", segment.fulltext().size());
        prop.put("otherHosts", "");
        prop.put("genUrlProfile", 0);
        prop.put("statistics", 1);
        prop.put("statistics_lines", 100);
        prop.put("statisticslines", 0);

        if (post == null || env == null) {
            return prop; // nothing to do
        }

        // post values that are set on numerous input fields with same name
        String urlstring = post.get("urlstring", "").trim();

        if (!urlstring.startsWith("http://") &&
            !urlstring.startsWith("https://") &&
            !urlstring.startsWith("ftp://") &&
            !urlstring.startsWith("smb://") &&
            !urlstring.startsWith("file://")) { urlstring = "http://" + urlstring; }

        prop.putHTML("urlstring", urlstring);
        prop.put("result", " ");

        if (post.containsKey("urlstringsearch")) {
            try {
                final DigestURI url = new DigestURI(urlstring);
                String urlhash = ASCII.String(url.hash());
                prop.put("urlhash", urlhash);
                final URIMetadata entry = segment.fulltext().getMetadata(ASCII.getBytes(urlhash));
                if (entry == null) {
                    prop.putHTML("result", "No Entry for URL " + url.toNormalform(true, true));
                    prop.putHTML("urlstring", urlstring);
                    prop.put("urlhash", "");
                } else {
                    prop.putAll(genUrlProfile(segment, entry, urlhash));
                    prop.put("statistics", 0);
                }
            } catch (final MalformedURLException e) {
                prop.putHTML("result", "bad url: " + urlstring);
                prop.put("urlhash", "");
            }
            prop.put("lurlexport", 0);
        }

        // insert constants
        prop.putNum("ucount", segment.fulltext().size());
        // return rewrite properties
        return prop;
    }

    private static serverObjects genUrlProfile(final Segment segment, final URIMetadata entry, final String urlhash) {
        final serverObjects prop = new serverObjects();
        if (entry == null) {
            prop.put("genUrlProfile", "1");
            prop.put("genUrlProfile_urlhash", urlhash);
            return prop;
        }
        final URIMetadata le = (entry.referrerHash() == null || entry.referrerHash().length != Word.commonHashLength) ? null : segment.fulltext().getMetadata(entry.referrerHash());
        if (entry.url() == null) {
            prop.put("genUrlProfile", "1");
            prop.put("genUrlProfile_urlhash", urlhash);
            return prop;
        }
        prop.put("genUrlProfile", "2");
        prop.putHTML("genUrlProfile_urlNormalform", entry.url().toNormalform(false, true));
        prop.put("genUrlProfile_urlhash", urlhash);
        prop.put("genUrlProfile_urlDescr", entry.dc_title());
        prop.put("genUrlProfile_moddate", entry.moddate().toString());
        prop.put("genUrlProfile_loaddate", entry.loaddate().toString());
        prop.put("genUrlProfile_referrer", (le == null) ? 0 : 1);
        prop.putHTML("genUrlProfile_referrer_url", (le == null) ? "<unknown>" : le.url().toNormalform(false, true));
        prop.put("genUrlProfile_referrer_hash", (le == null) ? "" : ASCII.String(le.hash()));
        prop.put("genUrlProfile_doctype", String.valueOf(entry.doctype()));
        prop.put("genUrlProfile_language", entry.language());
        prop.put("genUrlProfile_size", entry.size());
        prop.put("genUrlProfile_wordCount", entry.wordCount());
        return prop;
    }

}