package org.eclipse.ecf.internal.bulletinboard.commons;

import java.net.URL;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.eclipse.ecf.bulletinboard.BBException;
import org.eclipse.ecf.bulletinboard.IBBObject;
import org.eclipse.ecf.bulletinboard.IMember;
import org.eclipse.ecf.bulletinboard.IMemberGroup;
import org.eclipse.ecf.bulletinboard.IThread;
import org.eclipse.ecf.core.identity.ID;
import org.eclipse.ecf.core.identity.IDCreateException;
import org.eclipse.ecf.core.identity.Namespace;
import org.eclipse.ecf.internal.bulletinboard.commons.parsing.GenericParser;
import org.eclipse.ecf.internal.bulletinboard.commons.parsing.IPatternDescriptor;
import org.eclipse.ecf.internal.bulletinboard.commons.util.StringUtil;

public abstract class AbstractParser {
	protected Namespace namespace;

	protected URL baseURL;

	protected GenericParser genericParser;

	protected AbstractParser(Namespace namespace, URL baseURL) {
		this.namespace = namespace;
		this.baseURL = baseURL;
		this.genericParser = new GenericParser(namespace, baseURL);
	}

	public abstract void throwException(String msg, CharSequence seq)
			throws BBException;

	public abstract Long parseTimestamp(CharSequence seq);

	public abstract IPatternDescriptor getThreadPattern();

	public abstract IBBObjectFactory getThreadFactory();

	public abstract IPatternDescriptor getAuthorInfoMemberPattern();

	public Map<ID, IThread> parseThreads(final CharSequence seq) {
		IPatternDescriptor pattern = getThreadPattern();
		IBBObjectFactory factory = getThreadFactory();
		Matcher m = pattern.getPattern().matcher(seq);
		Map<ID, IThread> threads = new LinkedHashMap<ID, IThread>();
		while (m.find()) {
			Map<String, Object> values = pattern.getValueMap(m);
			ID id = null;
			try {
				id = factory.createBBObjectId(namespace, baseURL,
						(String) values.get(IPatternDescriptor.ID_PARAM));
			} catch (IDCreateException e) {
				// TODO autogen e
				e.printStackTrace();
			}
			String name = StringUtil.stripHTMLTrim((String) values
					.get(IPatternDescriptor.NAME_PARAM));
			String authorInfo = (String) values.get("authorInfo");
			IBBObject member = genericParser.parseSingleIdName(
					getAuthorInfoMemberPattern(), authorInfo,
					getMemberFactory());
			if (member != null) {
				values.put("author", member);
			} else {
				IBBObjectFactory gf = getGuestFactory();
				String guestName = StringUtil.stripHTMLTrim(authorInfo);
				ID guestID = null;
				try {
					guestID = gf
							.createBBObjectId(namespace, baseURL, guestName);
				} catch (IDCreateException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				values.put("author", getGuestFactory().createBBObject(guestID,
						guestName, null));
			}
			IThread obj = (IThread) factory.createBBObject(id,
					new String(name), values);
			threads.put(id, obj);
		}
		return threads;
	}

	public abstract Pattern getMemberNamePattern();

	public abstract IBBObjectFactory getMemberFactory();

	public abstract IBBObjectFactory getGuestFactory();

	public IMember parseMemberPageForName(final CharSequence seq, ID memberID) {
		Matcher m = getMemberNamePattern().matcher(seq);
		if (m.find()) {
			return (IMember) getMemberFactory().createBBObject(memberID,
					new String(m.group(1)), null);
		}
		return null;
	}

	public abstract IPatternDescriptor getMemberPattern();

	public Map<ID, IMember> parseMembers(final CharSequence seq) {
		// TODO is stripHTMLTrim needed? GenericParser doesn't do it
		Map<ID, IBBObject> objects = genericParser.parseMultiIdName(
				getMemberPattern(), seq, getMemberFactory(), true);
		Map<ID, IMember> members = new LinkedHashMap<ID, IMember>(objects
				.size());
		for (IBBObject obj : objects.values()) {
			members.put(obj.getID(), (IMember) obj);
		}
		return members;
	}

	public abstract IBBObjectFactory getMemberGroupFactory();

	public abstract Pattern getMemberGroupContainerPattern();

	public abstract IPatternDescriptor getMemberGroupPattern();

	public Map<ID, IMemberGroup> parseMemberGroups(final CharSequence seq)
			throws BBException {
		Matcher m = getMemberGroupContainerPattern().matcher(seq);
		if (m.find()) {
			// TODO is stripHTMLTrim needed? GenericParser doesn't do it
			Map<ID, IBBObject> objects = genericParser.parseMultiIdName(
					getMemberGroupPattern(), m.group(0),
					getMemberGroupFactory(), true);
			Map<ID, IMemberGroup> members = new LinkedHashMap<ID, IMemberGroup>(
					objects.size());
			for (IBBObject obj : objects.values()) {
				members.put(obj.getID(), (IMemberGroup) obj);
			}
			return members;
		} else {
			throwException("Could not find member groups.", seq);
		}
		return Collections.emptyMap();
	}
}