package com.genuineminecraft.bf;

public class Test {

	public static String test = "+++++++++[->+++++++++<]>+++.<++++[->++++<]>+.++++++++++++++.+.-----------.+++++.-------.<++++++++[->--------<]>-------.<+++++++++[->+++++++++<]>+++.---------------.++++++++++++++.+.-----------.+++++.-------.<++++++++[->--------<]>-------.<++++[->++++<]>+.<++++[->----<]>-.<++++[->++++<]>++.";

	public static void main(String[] args) {
		timeTrials();
		qualityCheck();
	}

	public static void qualityCheck() {
		String min = encode(test);
		String mag = decode(min);
		System.out.println("Debug: " + test);
		System.out.println("Debug: " + min);
		System.out.println("Debug: " + mag);
		if (!test.equals(mag))
			System.out.println("Error: Test Failed");
		else
			System.out.println("Success: Test Passed");
	}

	public static void timeTrials() {
		long start, stop;
		int count = 1000000;
		System.out.println("Debug: Running " + count + " times.");
		start = System.currentTimeMillis();
		for (int i = 0; i < count; i++)
			encode_1(test);
		stop = System.currentTimeMillis();
		System.out.println("Debug 1: " + (stop - start) + " millseconds.");
		start = System.currentTimeMillis();
		for (int i = 0; i < count; i++)
			encode_2(test);
		stop = System.currentTimeMillis();
		System.out.println("Debug 2: " + (stop - start) + " millseconds.");
		start = System.currentTimeMillis();
		for (int i = 0; i < count; i++)
			encode_3(test);
		stop = System.currentTimeMillis();
		System.out.println("Debug 3: " + (stop - start) + " millseconds.");
	}

	public static String encode(String in) {
		return encode_1(in);
	}

	public static String decode(String in) {
		return decode_1(in);
	}

	private static String encode_1(String in) {
		String out = "";
		int counter = 0;
		for (int place = 0; place < in.length(); place++) {
			char compare = in.charAt(place);
			if (in.length() > place + 1 && compare == in.charAt(place + 1)) {
				counter++;
				continue;
			}
			switch (counter) {
				case 0:
					out += Character.toString(compare);
					break;
				case 1:
					out += Character.toString(compare) + Character.toString(compare);
					break;
				default:
					out += Integer.toString(counter + 1) + Character.toString(compare);
					break;
			}
			counter = 0;
		}
		return out;
	}

	private static String encode_2(String in) {
		String out = "";
		int counter = 0;
		for (int place = 0; place < in.length(); place++) {
			char compare = in.charAt(place);
			if (in.length() > place + 1 && compare == in.charAt(place + 1)) {
				counter++;
				continue;
			}
			out += (counter == 0 ? "" :
				counter == 1 ? Character.toString(compare) : Integer.toString(counter + 1)) +
					Character.toString(compare);
			counter = 0;
		}
		return out;
	}

	private static String encode_3(String in) {
		String out = "";
		while (in.length() > 0) {
			int counter = 0;
			char compare = in.charAt(0);
			while (counter < in.length() && in.charAt(counter) == compare)
				counter++;
			in = in.substring(counter - (counter == 2 ? 1 : 0));
			if (counter > 2)
				out += counter;
			out += compare;
		}
		return out;
	}

	private static String decode_1(String in) {
		String out = "";
		for (int i = 0; i < in.length(); i++) {
			String t = "";
			while (Character.isDigit(in.charAt(i)))
				t += in.charAt(i++);
			int n = 1;
			if (!t.isEmpty())
				n = Integer.parseInt(t, 10);
			for (int j = 0; j < n; j++)
				out += in.charAt(i);
		}
		return out;
	}
}