package bytecode;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import de.dhbwstuttgart.typeinference.Menge;

import de.dhbwstuttgart.bytecode.ClassFile;
import de.dhbwstuttgart.core.MyCompiler;
import de.dhbwstuttgart.core.MyCompilerAPI;
import de.dhbwstuttgart.myexception.JVMCodeException;
import junit.framework.TestCase;

public class BytecodeTester{

	//Web-Disassembler: http://hakurai.github.io/javap.js/web/
	
	public static final String rootDirectory = System.getProperty("user.dir")+"/test/bytecode/";
	
	public static Menge<ClassFile> testCodegen(String sourceCode){
		MyCompilerAPI compiler = MyCompiler.getAPI();
		compiler.parse(sourceCode);
		Menge<ClassFile> ret = null;
		try {
			ret  = compiler.codeGeneration(null);
		} catch (NullPointerException | JVMCodeException e) {
			e.printStackTrace();
			TestCase.fail();
		}
		TestCase.assertTrue("Es wurden keine ClassFiles generiert",ret != null && ret.size()>0);
		return ret;
	}
	
	public static Menge<ClassFile> readFileAndTestCodegen(String fileName) throws IOException{
		return testCodegen(getFileContent(rootDirectory + fileName));
	}
	
	private static String getFileContent(String path)throws IOException 
	{
		byte[] encoded = Files.readAllBytes(Paths.get(path));
		return StandardCharsets.UTF_8.decode(ByteBuffer.wrap(encoded)).toString();
	}
}