import java.io.FileWriter;
import java.io.PrintWriter;
import java.lang.reflect.Method;


public class TestBench {

	public static final int SLEEP_TIME = 2;


//	public static void main(String [ ] args) throws Exception{
//		test("linear", 3, 1, 50);
//		test("quadratic", 3, 1, 50);
//		test("cubic", 3, 1, 20);
//		test("logarithmic", 3, 1, 50);
//		test("factorial", 3, 1, 50);
//		test("factorialRec", 3, 1, 50);
//		test("pow", 3, 1, 50);
//		test("powRec1", 3, 1, 12);
//		test("powRec2", 3, 1, 50);
//		test("powRec3", 3, 1, 50);
//		test("powRec4", 3, 1, 50);
//	}

	public static void testAlgorithm(String className, String methodName, long n){
		try {
			Class<?> myClass = Class.forName(className);
			Object myClassInstance = (Object) myClass.newInstance();
			Method method = myClass.getMethod(methodName, long.class);
			method.invoke(myClassInstance, n);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void test(String className, String methodName, String outputFileName, int samples, int startN, int endN){
		FileWriter file = null;
		PrintWriter pw;
//		long[] avg = new long[(endN-startN)+2];
//		for(int i = 0; i<avg.length; i++){
//			avg[i] = 0;
//		}
		try{
			file = new FileWriter(outputFileName+".txt");
			pw = new PrintWriter(file);
			for(long n = startN; n<=endN; n++){
				long start = System.currentTimeMillis();
				testAlgorithm(className,methodName,n);
				long spent = 0;
				for(long i = 0; i<samples; i++){
					spent = System.currentTimeMillis() - start;
				}
				pw.println(spent/samples);
				System.out.println((spent) + " milliseconds");
			}

//			for(int i = 0; i<avg.length; i++){
//				long average = avg[i]/samples;
//				pw.println(average);
//			}

		}catch (Exception e){
			e.printStackTrace();
		}finally{
			try{
				if(file!=null){
					file.close();
				}
			}catch (Exception e){
				e.printStackTrace();
			}
		}
	}

//	public static void test(String outputFileName, int startN, int endN){
//		FileWriter file = null;
//		PrintWriter pw;
//		try{
//			file = new FileWriter(outputFileName);
//			pw = new PrintWriter(file);
//			long total = 0;
//			long iterations = 0;
//			for(long n = startN; n<=endN; n++){
//				long start = System.currentTimeMillis();
//				Algorithms.logarithmic(n);
//				long spent = System.currentTimeMillis() - start;
//				pw.println(spent);
//				//System.out.println((spent) + " milliseconds");
//			}
//
//		}catch (Exception e){
//			e.printStackTrace();
//		}finally{
//			try{
//				if(file!=null){
//					file.close();
//				}
//			}catch (Exception e){
//				e.printStackTrace();
//			}
//		}
//	}

	public static void doNothing(long i){
		System.out.println("Doing nothing at iterarion... ("+i+")");
		long endTime = System.currentTimeMillis() + SLEEP_TIME;
		while (System.currentTimeMillis() < endTime){
			//do nothing
		}
	}
}