/*******************************************************************************
 * Copyright (c) 2014 Jeff Martin.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Jeff Martin - initial API and implementation
 ******************************************************************************/
package cuchaz.enigma;

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.List;

import com.google.common.collect.Lists;
import com.strobel.decompiler.languages.java.ast.CompilationUnit;

import cuchaz.enigma.analysis.EntryReference;
import cuchaz.enigma.analysis.SourceIndex;
import cuchaz.enigma.analysis.Token;
import cuchaz.enigma.mapping.Entry;

public class TokenChecker
{
	private Deobfuscator m_deobfuscator;
		
	protected TokenChecker( File jarFile )
	throws IOException
	{
		m_deobfuscator = new Deobfuscator( jarFile );
	}
	
	protected String getDeclarationToken( Entry entry )
	{
		// decompile the class
		CompilationUnit tree = m_deobfuscator.getSourceTree( entry.getClassName() );
		// DEBUG
		//tree.acceptVisitor( new TreeDumpVisitor( new File( "tree." + entry.getClassName().replace( '/', '.' ) + ".txt" ) ), null );
		String source = m_deobfuscator.getSource( tree );
		SourceIndex index = m_deobfuscator.getSourceIndex( tree, source );
		
		// get the token value
		Token token = index.getDeclarationToken( entry );
		if( token == null )
		{
			return null;
		}
		return source.substring( token.start, token.end );
	}
	
	@SuppressWarnings( "unchecked" )
	protected Collection<String> getReferenceTokens( EntryReference<? extends Entry,? extends Entry> reference )
	{
		// decompile the class
		CompilationUnit tree = m_deobfuscator.getSourceTree( reference.context.getClassName() );
		String source = m_deobfuscator.getSource( tree );
		SourceIndex index = m_deobfuscator.getSourceIndex( tree, source );
		
		// get the token values
		List<String> values = Lists.newArrayList();
		for( Token token : index.getReferenceTokens( (EntryReference<Entry,Entry>)reference ) )
		{
			values.add( source.substring( token.start, token.end ) );
		}
		return values;
	}
}