/*******************************************************************************
 * 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.analysis;

import com.google.common.collect.Lists;
import cuchaz.enigma.mapping.entry.ClassEntry;
import cuchaz.enigma.mapping.entry.MethodEntry;
import cuchaz.enigma.mapping.Translator;

import javax.swing.tree.DefaultMutableTreeNode;
import java.util.List;

public class MethodImplementationsTreeNode extends DefaultMutableTreeNode {

	private Translator deobfuscatingTranslator;
	private MethodEntry entry;

	public MethodImplementationsTreeNode(Translator deobfuscatingTranslator, MethodEntry entry) {
		if (entry == null) {
			throw new IllegalArgumentException("Entry cannot be null!");
		}

		this.deobfuscatingTranslator = deobfuscatingTranslator;
		this.entry = entry;
	}

	public static MethodImplementationsTreeNode findNode(MethodImplementationsTreeNode node, MethodEntry entry) {
		// is this the node?
		if (node.getMethodEntry().equals(entry)) {
			return node;
		}

		// recurse
		for (int i = 0; i < node.getChildCount(); i++) {
			MethodImplementationsTreeNode foundNode = findNode((MethodImplementationsTreeNode) node.getChildAt(i), entry);
			if (foundNode != null) {
				return foundNode;
			}
		}
		return null;
	}

	public MethodEntry getMethodEntry() {
		return this.entry;
	}

	public String getDeobfClassName() {
		return this.deobfuscatingTranslator.getTranslatedClass(this.entry.getOwnerClassEntry()).getClassName();
	}

	public String getDeobfMethodName() {
		return this.deobfuscatingTranslator.getTranslatedMethod(this.entry).getName();
	}

	@Override
	public String toString() {
		String className = getDeobfClassName();
		if (className == null) {
			className = this.entry.getClassName();
		}

		String methodName = getDeobfMethodName();
		if (methodName == null) {
			methodName = this.entry.getName();
		}
		return className + "." + methodName + "()";
	}

	public void load(JarIndex index) {

		// get all method implementations
		List<MethodImplementationsTreeNode> nodes = Lists.newArrayList();
		for (String implementingClassName : index.getImplementingClasses(this.entry.getClassName())) {
			MethodEntry methodEntry = new MethodEntry(new ClassEntry(implementingClassName), this.entry.getName(), this.entry.getDesc());
			if (index.containsObfMethod(methodEntry)) {
				nodes.add(new MethodImplementationsTreeNode(this.deobfuscatingTranslator, methodEntry));
			}
		}

		// add them to this node
		nodes.forEach(this::add);
	}
}