/*******************************************************************************
 * Copyright (c) 2015 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser General Public
 * License v3.0 which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/lgpl.html
 * <p>
 * Contributors:
 * Jeff Martin - initial API and implementation
 ******************************************************************************/

package cuchaz.enigma.convert;

import com.google.common.collect.*;
import cuchaz.enigma.Deobfuscator;
import cuchaz.enigma.mapping.ClassEntry;
import cuchaz.enigma.mapping.Entry;

import java.util.Collection;
import java.util.Set;

public class MemberMatches<T extends Entry> {

	private BiMap<T, T> matches;
	private Multimap<ClassEntry, T> matchedSourceEntries;
	private Multimap<ClassEntry, T> unmatchedSourceEntries;
	private Multimap<ClassEntry, T> unmatchedDestEntries;
	private Multimap<ClassEntry, T> unmatchableSourceEntries;

	public MemberMatches() {
		matches = HashBiMap.create();
		matchedSourceEntries = HashMultimap.create();
		unmatchedSourceEntries = HashMultimap.create();
		unmatchedDestEntries = HashMultimap.create();
		unmatchableSourceEntries = HashMultimap.create();
	}

	public void addMatch(T srcEntry, T destEntry) {
		boolean wasAdded = matches.put(srcEntry, destEntry) == null;
		assert (wasAdded);
		wasAdded = matchedSourceEntries.put(srcEntry.getClassEntry(), srcEntry);
		assert (wasAdded);
	}

	public void addUnmatchedSourceEntry(T sourceEntry) {
		boolean wasAdded = unmatchedSourceEntries.put(sourceEntry.getClassEntry(), sourceEntry);
		assert (wasAdded);
	}

	public void addUnmatchedSourceEntries(Iterable<T> sourceEntries) {
		for (T sourceEntry : sourceEntries) {
			addUnmatchedSourceEntry(sourceEntry);
		}
	}

	public void addUnmatchedDestEntry(T destEntry) {
		if (destEntry.getName().equals("<clinit>") || destEntry.getName().equals("<init>"))
			return;
		boolean wasAdded = unmatchedDestEntries.put(destEntry.getClassEntry(), destEntry);
		assert (wasAdded);
	}

	public void addUnmatchedDestEntries(Iterable<T> destEntriesntries) {
		for (T entry : destEntriesntries) {
			addUnmatchedDestEntry(entry);
		}
	}

	public void addUnmatchableSourceEntry(T sourceEntry) {
		boolean wasAdded = unmatchableSourceEntries.put(sourceEntry.getClassEntry(), sourceEntry);
		assert (wasAdded);
	}

	public Set<ClassEntry> getSourceClassesWithUnmatchedEntries() {
		return unmatchedSourceEntries.keySet();
	}

	public Collection<ClassEntry> getSourceClassesWithoutUnmatchedEntries() {
		Set<ClassEntry> out = Sets.newHashSet();
		out.addAll(matchedSourceEntries.keySet());
		out.removeAll(unmatchedSourceEntries.keySet());
		return out;
	}

	public Collection<T> getUnmatchedSourceEntries() {
		return unmatchedSourceEntries.values();
	}

	public Collection<T> getUnmatchedSourceEntries(ClassEntry sourceClass) {
		return unmatchedSourceEntries.get(sourceClass);
	}

	public Collection<T> getUnmatchedDestEntries() {
		return unmatchedDestEntries.values();
	}

	public Collection<T> getUnmatchedDestEntries(ClassEntry destClass) {
		return unmatchedDestEntries.get(destClass);
	}

	public Collection<T> getUnmatchableSourceEntries() {
		return unmatchableSourceEntries.values();
	}

	public boolean hasSource(T sourceEntry) {
		return matches.containsKey(sourceEntry) || unmatchedSourceEntries.containsValue(sourceEntry);
	}

	public boolean hasDest(T destEntry) {
		return matches.containsValue(destEntry) || unmatchedDestEntries.containsValue(destEntry);
	}

	public BiMap<T, T> matches() {
		return matches;
	}

	public boolean isMatchedSourceEntry(T sourceEntry) {
		return matches.containsKey(sourceEntry);
	}

	public boolean isMatchedDestEntry(T destEntry) {
		return matches.containsValue(destEntry);
	}

	public boolean isUnmatchableSourceEntry(T sourceEntry) {
		return unmatchableSourceEntries.containsEntry(sourceEntry.getClassEntry(), sourceEntry);
	}

	public void makeMatch(T sourceEntry, T destEntry) {
		makeMatch(sourceEntry, destEntry, null, null);
	}

	public void makeMatch(T sourceEntry, T destEntry, Deobfuscator sourceDeobfuscator, Deobfuscator destDeobfuscator) {
		if (sourceDeobfuscator != null && destDeobfuscator != null) {
			makeMatch(sourceEntry, destEntry);
			sourceEntry = (T) sourceEntry.cloneToNewClass(sourceDeobfuscator.getJarIndex().getTranslationIndex().resolveEntryClass(sourceEntry, true));
			destEntry = (T) destEntry.cloneToNewClass(destDeobfuscator.getJarIndex().getTranslationIndex().resolveEntryClass(destEntry, true));
		}
		boolean wasRemoved = unmatchedSourceEntries.remove(sourceEntry.getClassEntry(), sourceEntry);
		assert (wasRemoved);
		wasRemoved = unmatchedDestEntries.remove(destEntry.getClassEntry(), destEntry);
		assert (wasRemoved);
		addMatch(sourceEntry, destEntry);
	}

	public boolean isMatched(T sourceEntry, T destEntry) {
		T match = matches.get(sourceEntry);
		return match != null && match.equals(destEntry);
	}

	public void unmakeMatch(T sourceEntry, T destEntry, Deobfuscator sourceDeobfuscator, Deobfuscator destDeobfuscator) {
		if (sourceDeobfuscator != null && destDeobfuscator != null) {
			unmakeMatch(sourceEntry, destEntry, null, null);
			sourceEntry = (T) sourceEntry.cloneToNewClass(
				sourceDeobfuscator.getJarIndex().getTranslationIndex().resolveEntryClass(sourceEntry, true));
			destEntry = (T) destEntry.cloneToNewClass(
				destDeobfuscator.getJarIndex().getTranslationIndex().resolveEntryClass(destEntry, true));
		}

		boolean wasRemoved = matches.remove(sourceEntry) != null;
		assert (wasRemoved);
		wasRemoved = matchedSourceEntries.remove(sourceEntry.getClassEntry(), sourceEntry);
		assert (wasRemoved);
		addUnmatchedSourceEntry(sourceEntry);
		addUnmatchedDestEntry(destEntry);
	}

	public void makeSourceUnmatchable(T sourceEntry, Deobfuscator sourceDeobfuscator) {
		if (sourceDeobfuscator != null) {
			makeSourceUnmatchable(sourceEntry, null);
			sourceEntry = (T) sourceEntry.cloneToNewClass(
				sourceDeobfuscator.getJarIndex().getTranslationIndex().resolveEntryClass(sourceEntry, true));
		}
		assert (!isMatchedSourceEntry(sourceEntry));
		boolean wasRemoved = unmatchedSourceEntries.remove(sourceEntry.getClassEntry(), sourceEntry);
		assert (wasRemoved);
		addUnmatchableSourceEntry(sourceEntry);
	}
}