import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

import java.util.regex.Pattern;

import static org.junit.jupiter.api.Assertions.*;

class PasswordGeneratorTest {

    static PasswordGenerator passwordGenerator;

    @BeforeAll
    static void init() {
        passwordGenerator = new PasswordGenerator();
    }

    @Test
    void testGeneratedPasswordLength() {
        assertNotSame("", passwordGenerator.generateRandomPassword());
        assertEquals(passwordGenerator.generateRandomPassword().length(), passwordGenerator.getLength());

        passwordGenerator.setLength(33);
        assertEquals(passwordGenerator.getLength(), 33);
        assertEquals(passwordGenerator.generateRandomPassword().length(), passwordGenerator.getLength());
    }

    @Test
    void testPasswordLowercaseRequirement() {
        passwordGenerator.setUseLowercase(false);
        assertFalse(Pattern.compile("^(?=.*[a-z]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
        passwordGenerator.setUseLowercase(true);
        assertTrue(Pattern.compile("^(?=.*[a-z]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
    }

    @Test
    void testPasswordUppercaseRequirement() {
        passwordGenerator.setUseUppercase(false);
        assertFalse(Pattern.compile("^(?=.*[A-Z]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
        passwordGenerator.setUseUppercase(true);
        assertTrue(Pattern.compile("^(?=.*[A-Z]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
    }

    @Test
    void testPasswordDigitsRequirement() {
        passwordGenerator.setUseDigits(false);
        assertFalse(Pattern.compile("^(?=.*\\d).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
        passwordGenerator.setUseDigits(true);
        assertTrue(Pattern.compile("^(?=.*\\d).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
    }

    @Test
    void testPasswordSpecialCharactersRequirement() {
        passwordGenerator.setUseSpecialCharacters(false);
        assertFalse(Pattern.compile("^(?=.*[.!?=@#$()%^&/*_\\-+]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
        passwordGenerator.setUseSpecialCharacters(true);
        assertTrue(Pattern.compile("^(?=.*[.!?=@#$()%^&/*_\\-+]).+$").matcher(passwordGenerator.generateRandomPassword()).matches());
    }

    @Test
    void testPasswordForEveryRequiredCharacter() {
        passwordGenerator.setRequireEveryConfiguredCharacterType(true);
        PasswordValidator passwordValidator = new PasswordValidator();
        assertTrue(passwordValidator.validate(passwordGenerator.generateRandomPassword()));
    }

    @Test
    void testShufflePassword() {
        String testInput = "ABcdefgh123";
        assertNotEquals(passwordGenerator.shufflePassword(testInput), testInput);
        assertEquals(passwordGenerator.shufflePassword(testInput).length(), testInput.length());
    }
}