import java.util.*;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import org.junit.runners.JUnit4;

public class SolutionTest {
  
  public static String generarLetra() {
        StringBuilder phrase = new StringBuilder();

        for (int i = 0; i < 1; i++) {
            char letter = (char) (new Random().nextInt('Z' - 'A') + 'A');
            phrase.append(new Random().nextBoolean() ? letter : Character.toLowerCase(letter));
        }

        return phrase.toString();
    }

    public static String generator() {
        StringBuilder sb = new StringBuilder();

        // Genera entre 1 y 10 letras aleatorias en mayúscula o minúscula
        int numLetters = new Random().nextInt(9) + 1;
        for (int i = 0; i < numLetters; i++) {
            sb.append(generarLetra()).append(" ");
        }

        // Añadir las letras y los números a la cadena en el formato letra número
        for (int i = 0; i < numLetters; i++) {
            int randomNums = new Random().nextInt(100) + 10;
            String nums = String.valueOf(randomNums);
            sb.append(nums);
            randomNums = new Random().nextInt(100) + 10;
            nums = String.valueOf(randomNums);
            sb.append(generarLetra());
            sb.append(nums);
            if (i < numLetters - 1) sb.append(" ");
        }

        //Metemos todos los valores aleatorios en un ArrayList y desordenamos el patron
        ArrayList<String> list = new ArrayList<>(List.of(sb.toString().split(" ")));
        Collections.shuffle(list);
        StringBuilder result = new StringBuilder();
        int i = 0;
        while (i < list.size() - 1) {
            result.append(list.get(i));
            result.append(" ");
            i++;
        }
        result.append(list.get(i));

        return result.toString();
    }
  
  
    @Test
    public void sampleTests() {
      //Sample tests
      assertEquals("a:11a1 b:222b22 c:3c33", Kata.keyAlphabet("a b c 11a1 222b22 3c33"));
      assertEquals("a:11a1,222a33 b:222b22 c:3c33", Kata.keyAlphabet("222a33 a b c 11a1 222b22 3c33 5"));
      assertEquals("a:11a1,12a1,13a1 c:33c3 d:2d2", Kata.keyAlphabet("a d c x 11a1 2d2 33c3 13a1 12a1"));
      assertEquals("", Kata.keyAlphabet(""));
      assertEquals("a:11a1 b:2b2 c:33c3", Kata.keyAlphabet("a b c d 11a1 33c3 2b2"));
      assertEquals("a:11a1 b:2b2 c:33c3", Kata.keyAlphabet("a b c 11a1 33c3 2b2 d44"));
      
      //Tests
      assertEquals("a:a90,a90 b:12b6,33b4", Kata.keyAlphabet("a b c d e f g h i j k l m n o p q r s t u v w y z 33b4 5x5 12b6 A90 A90"));
      assertEquals("a:a11", Kata.keyAlphabet("a a a11"));
    }
  
    @Test
    public void randomTest(){
      for(int i = 0; i < 5; i++){
        String input = generator();
        String expected = Kata.keyAlphabet(input);
        assertEquals(expected,Kata.keyAlphabet(input));
        System.out.println(expected);
      }
    }
  
  
}