package servlets.module.lesson;

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

import dbProcs.GetterIT;
import dbProcs.Setter;
import java.io.IOException;
import java.sql.SQLException;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.mock.web.MockServletConfig;
import testUtils.TestProperties;

public class XssLessonIT {

  private static String lang = "en_GB";
  private static final Logger log = LogManager.getLogger(XssLessonIT.class);
  private static String applicationRoot = new String();
  private MockHttpServletRequest request;
  private MockHttpServletResponse response;

  /** Creates DB or Restores DB to Factory Defaults before running tests */
  @BeforeAll
  public static void resetDatabase() throws IOException, SQLException {
    TestProperties.setTestPropertiesFileDirectory(log);

    TestProperties.createMysqlResource();

    TestProperties.ensureSchemaReady(log);
    TestProperties.reseedTestData();
  }

  @BeforeEach
  public void setup() {
    request = new MockHttpServletRequest();
    response = new MockHttpServletResponse();
    // Open All modules
    if (!Setter.openAllModules(applicationRoot, false)
        && !Setter.openAllModules(applicationRoot, true)) {
      fail("Could not Mark All Modules As Open");
    }
  }

  public String getModuleDoPost(String searchTerm, String csrfToken, int expectedResponseCode)
      throws Exception {
    try {
      String servletClassName = "XssLesson";
      log.debug("Creating " + servletClassName + " Servlet Instance");
      XssLesson servlet = new XssLesson();
      servlet.init(new MockServletConfig(servletClassName));

      // Setup Servlet Parameters and Attributes
      log.debug("Setting Up Params and Atrributes");
      request.addParameter("searchTerm", searchTerm);
      // Adding Correct CSRF Token (Token Submitted)
      request.addParameter("csrfToken", csrfToken);

      log.debug("Running doPost");
      servlet.doPost(request, response);

      if (response.getStatus() != expectedResponseCode) {
        fail(
            servletClassName
                + " Servlet Returned "
                + response.getStatus()
                + " Code. "
                + expectedResponseCode
                + " Expected");
      } else {
        log.debug("302 OK Detected");
        log.debug(
            servletClassName
                + " Successful, returning location retrieved: "
                + response.getContentAsString());
        return (response.getContentAsString());
      }
    } catch (Exception e) {
      throw e;
    }
    return null;
  }

  @Test
  public void testLevelValidAnswerScriptTags() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<script>alert(1)</script>";
        String servletResponse = getModuleDoPost(xssString, csrfToken, 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Valid Solution did not yeild Result Key");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains(xssString)) {
          String message = new String("Xss String Not Reflected in Response");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelValidAnswerImgTags() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<img src='#' onerror='alert(1)'>";
        String servletResponse = getModuleDoPost(xssString, csrfToken, 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Valid Solution did not yeild Result Key");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains(xssString)) {
          String message = new String("Xss String Not Reflected in Response");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelValidAnsweriFrameTags() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<iframe src='javascript:alert(1);//'></iframe>";
        String servletResponse = getModuleDoPost(xssString, csrfToken, 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Valid Solution did not yeild Result Key");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains(xssString)) {
          String message = new String("Xss String Not Reflected in Response");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelValidAnswerAnchorTags() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<a href='javascript:alert(1);//'>click me</a>";
        String servletResponse = getModuleDoPost(xssString, csrfToken, 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Valid Solution did not yeild Result Key");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains(xssString)) {
          String message = new String("Xss String Not Reflected in Response");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelInvalidAnswer() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<p>NotXSSAtAll</p>";
        String servletResponse = getModuleDoPost(xssString, csrfToken, 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Invalid Solution Returnedd Result Key");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains(xssString)) {
          String message = new String("Xss String Not Reflected in Response");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelInvalidAnswerIncompleteScript() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<script>alert(1)";
        String servletResponse = getModuleDoPost(xssString, csrfToken, 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Invalid Solution Returnedd Result Key");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.contains(xssString)) {
          String message = new String("Xss String Not Reflected in Response");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelInvalidCsrfToken() {
    String userName = "lessonTester";
    try {
      // Verify User Exists in DB
      GetterIT.verifyTestUser(applicationRoot, userName, userName);
      // Sign in as Normal User
      log.debug("Signing in as " + userName + " Through LoginServlet");
      TestProperties.loginDoPost(log, request, response, userName, userName, null, lang);
      log.debug("Login Servlet Complete, Getting CSRF Token");
      if (response.getCookie("token") == null) {
        fail("No CSRF Token Was Returned from Login Servlet");
      }
      String csrfToken = response.getCookie("token").getValue();
      if (csrfToken.isEmpty()) {
        String message = new String("No CSRF token returned from Login Servlet");
        log.fatal(message);
        fail(message);
      } else {
        request.setCookies(response.getCookies());
        String xssString = "<script>alert(1)";
        String servletResponse = getModuleDoPost(xssString, "wrongCsrfToken", 302);
        if (servletResponse.contains("You must be getting funky")) {
          String message = new String("General 'Funky' Error Detected");
          log.fatal(message);
          fail(message);
        }
        if (servletResponse.contains("The result key for this lesson is")) {
          String message = new String("Invalid Solution Returnedd Result Key");
          log.fatal(message);
          fail(message);
        }
        if (servletResponse.contains(xssString)) {
          String message = new String("Xss String Reflected in Response with bad CSRF Token");
          log.fatal(message);
          fail(message);
        }
        if (!servletResponse.isEmpty()) {
          String message = new String("CSRF Error should be a blank response. It wasn't");
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }

  @Test
  public void testLevelNoAuth() {
    try {
      request.getSession().setAttribute("lang", lang);
      String servletResponse =
          getModuleDoPost(
              "Anything",
              "Anything",
              200); // Mock response is 200 for Unauthenticated response for some reason
      if (servletResponse.contains("You must be getting funky")) {
        String message = new String("General 'Funky' Error Detected");
        log.fatal(message);
        fail(message);
      } else if (!servletResponse.contains(
          "No session was detected with your request. Are you signed in?")) {
        String message = new String("Did not get 'Unauthenticated' Response");
        log.fatal(message);
        fail(message);
      } else if (servletResponse.contains(
          "Results")) // This string is in all possible responses except unauthenticated
      {
        String message = new String("Appears that an Unauthticated Response Worked");
        log.fatal(message);
        fail(message);
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Could not Complete: " + e.toString());
    }
  }
}