package sbst.runtool;

import java.io.File;
import java.util.List;
import java.util.ArrayList;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.BufferedReader;
import java.io.InputStream;
import java.nio.channels.FileChannel;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class Manual implements ITestingTool{

	static final int MAX_NUMBER_OF_TESTFILES = 100 ;
	
    List<File> classPath;
    String extracp;

    public Manual(String extraCP){
        this.extracp = extraCP;
    }


	public List<File> getExtraClassPath(){
        List<File> ret = null;
        if(extracp != null){
            ret = new ArrayList<File>();
            ret.add(new File(extracp));
        }
        return ret;
    }

	public void initialize(File src, File bin, List<File> classPath){
        this.classPath = classPath;
    }

	public void run(String cName){
		boolean success = false ;
		success = copyUnitTestFile(cName,null) ;
		if (true) return ; // we assume no other test-file is produced
		// else we assume the test files are numbered
		int nr ;
		for (nr=0; nr<MAX_NUMBER_OF_TESTFILES; nr++) {
			success = copyUnitTestFile(cName,nr) ;
			if (!success) break ;
		}
		if (nr==0) {
			// no test-file is found!~
			throw new RuntimeException("No test file found for the class " + cName + "!");
		}
    }
	
	
	boolean copyUnitTestFile(String targetClassName, Integer nr) {
		try{
            File path = new File("./" + targetClassName.replace('.', '/'));
            String pathPref = path.getParent();
            File testFile1 ;
            File testFile2 ;
            if (nr == null) {
               testFile1 = new File("./tests/" + pathPref + "/" + "Test" + path.getName() + ".java");
               testFile2 = new File("./tests/" + pathPref + "/" + path.getName() + "Test" + ".java");
            }
            else {
               testFile1 = new File("./tests/" + pathPref + "/" + "Test" + nr + path.getName() + ".java");
               testFile2 = new File("./tests/" + pathPref + "/" + path.getName() + "Test" + nr + ".java");
            }

            if(testFile1.exists()) {
                CopyToDirectory(testFile1, new File("./temp/testcases/" + pathPref), null);
                return true ;
            }
            if(testFile2.exists()) {
                CopyToDirectory(testFile2, new File("./temp/testcases/" + pathPref), null);
                return true ;
            }
            // no test-file with with the specified nr exists:
            return false ;
		}
		catch (IOException e) {
			return false ;
		}
	}
	

    public static void CopyToDirectory(File fileOrDirectory, File destDir, String targetName) throws IOException{

        if(targetName == null)
            targetName = fileOrDirectory.getName();

        if(!destDir.exists()){
            if(!destDir.mkdirs())
                throw new IOException("Unable to create directory " + destDir.getAbsolutePath());
        }

        if(fileOrDirectory.isFile()){
            File destFile = new File(destDir.getAbsolutePath() + File.separator + targetName);
            if(!destFile.exists()){
                if(!destFile.createNewFile())
                    throw new IOException("Unable to create file " + destFile.getAbsolutePath());
            }

            FileChannel source = null;
            FileChannel destination = null;

            try {
                source = new FileInputStream(fileOrDirectory).getChannel();
                destination = new FileOutputStream(destFile).getChannel();
                destination.transferFrom(source, 0, source.size());
            }finally {
                if(source != null)
                    source.close();
                if(destination != null)
                    destination.close();
            }
        }else if(fileOrDirectory.isDirectory()){
            File copyDir = new File(destDir.getAbsolutePath() + File.separator + targetName);

            if(!copyDir.exists()){
                if(!copyDir.mkdir())
                    throw new IOException("Unable to create directory " + copyDir.getAbsolutePath());
            }

            File[] files = fileOrDirectory.listFiles();
            if(files != null) {
                for(File f: files)
                    CopyToDirectory(f, copyDir, null);
            }
        }
    }

}