package plugindevelopment;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Vector;

import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.FileAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.SimpleLayout;

import typinferenz.TypeInsertPoint;
import typinferenz.TypeInsertSet;
import junit.framework.TestCase;
import mycompiler.MyCompiler;
import mycompiler.MyCompilerAPI;
import mycompiler.myparser.JavaParser.yyException;
import mycompiler.mytest.LambdaTest;
import mycompiler.mytypereconstruction.TypeinferenceResultSet;


public class TypeInsertTester{

	private static Logger inferencelog = Logger.getLogger("Typeinference");
	static{
		{
	        // Ausgabeoptionen fuer die Logger
	        ConsoleAppender logAppender = new ConsoleAppender(new SimpleLayout());
	        logAppender.setTarget("System.out");
	        logAppender.activateOptions();
	        inferencelog.addAppender(logAppender); //Bei den Tests wird der Log auch in System.out geschrieben.
		}
	}
	private static final String rootDirectory = System.getProperty("user.dir")+"/test/plugindevelopment/";
	
	public static void test(String sourceFileToInfere, String solutionFile){
		String inferedSource = "";
		MyCompilerAPI compiler = MyCompiler.getAPI();
		try {
			compiler.parse(new File(rootDirectory + sourceFileToInfere));
			Vector<TypeinferenceResultSet> results = compiler.typeReconstruction();
			TestCase.assertTrue("Es darf nicht mehr als eine Lösungsmöglichkeit geben", results.size()==1);
			for(TypeinferenceResultSet result : results){
				Vector<TypeInsertSet> points = result.getTypeInsertionPoints();
				TestCase.assertTrue("Es muss mindestens ein TypeInsertSet vorhanden sein", points.size()>0);
				for(TypeInsertSet point : points){
					if(point.points.size()>0){
					inferedSource = point.insertAllTypes(getFileContent(rootDirectory + sourceFileToInfere));
					String solutionSource = getFileContent(rootDirectory + solutionFile);
					System.out.println("\nInferierter Source:\n"+inferedSource);
					TestCase.assertTrue("Nicht das erwartete Ergebnis", inferedSource.equals(solutionSource));
					}
				}
			}
			
		} catch (IOException | yyException e) {
			e.printStackTrace();
			TestCase.fail();
		}
	}
	
	//Source: https://stackoverflow.com/questions/326390/how-to-create-a-java-string-from-the-contents-of-a-file
	private static String getFileContent(String path)throws IOException 
	{
		byte[] encoded = Files.readAllBytes(Paths.get(path));
		return StandardCharsets.UTF_8.decode(ByteBuffer.wrap(encoded)).toString();
	}

}