package servlets.admin.config;

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

import jakarta.servlet.ServletException;
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;
import utils.OpenRegistration;

public class ToggleRegistrationIT {

  private static final Logger log = LogManager.getLogger(ToggleRegistrationIT.class);
  private static String applicationRoot = new String();
  private static String lang = "en_GB";
  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();
    // Set Registration to Closed
    OpenRegistration.disable();
    if (OpenRegistration.isEnabled()) {
      String message = "Unable to disable Registration";
      log.fatal(message);
      fail(message);
    }
  }

  /**
   * Method to Simulate the interaction with the Toggle Registration
   *
   * @param csrfToken The CSRF Token of the User
   * @return The Content of the Response (Which is supposed to be the location of the module)
   * @throws IOException
   * @throws ServletException
   * @throws Exception
   */
  public String doThePost(String csrfToken) throws ServletException, IOException {
    String servletClassName = "ToggleRegistration";

    int expectedResponseCode = 302;

    log.debug("Creating " + servletClassName + " Servlet Instance");
    ToggleRegistration servlet = new ToggleRegistration();
    servlet.init(new MockServletConfig(servletClassName));

    // 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(expectedResponseCode + " Detected");
      log.debug(
          "Servlet Successful, returning response retrieved: " + response.getContentAsString());
      return (response.getContentAsString());
    }
    return null;
  }

  /** This test checks that non admin users get access errors when changing Registration */
  @Test
  public void testUserToggle() {
    String userName = "configUserTester";
    String password = userName;
    // Verify / Create user in DB
    try {
      TestProperties.verifyTestUser(log, applicationRoot, userName, password);
      // Sign in as Normal User
      log.debug("Signing in as User 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 {
        // Add Cookies from Response to outgoing request
        request.setCookies(response.getCookies());
        String responseBody = doThePost(csrfToken);
        if (responseBody.contains("try non administrator functions")) {
          log.debug("Expected No Admin Access Result Received");
          if (OpenRegistration.isEnabled()) {
            String message = "Registration opened after what should have been a failed request";
            log.fatal(message);
            fail(message);
          }
        } else {
          String message = "Normal user did not get error when performing admin function";
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Exception Caught: " + e.toString());
    }
  }

  /** This test checks that admin users can change the registration */
  @Test
  public void testAdminToggle() {
    String userName = "configAdminTester";
    String password = userName;
    // Verify / Create user in DB
    try {
      TestProperties.verifyTestAdmin(log, applicationRoot, userName, password);
      // Sign in as Admin User
      log.debug("Signing in as User 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 {
        // Add Cookies from Response to outgoing request
        request.setCookies(response.getCookies());
        String responseBody = doThePost(csrfToken);
        if (responseBody.contains("The application Registration has been enabled")) {
          log.debug("The application Registration has been enabled");
          if (!OpenRegistration.isEnabled()) {
            String message = "Registration was not actually Enabled";
            log.fatal(message);
            fail(message);
          } else if (OpenRegistration.isDisabled()) {
            String message = "OpenRegistration still returning possitive for isDisabled() check";
            log.fatal(message);
            fail(message);
          } else {
            // Do the Request again to disable registration again
            responseBody = doThePost(csrfToken);
            if (responseBody.contains("The application Registration has been disabled")) {
              log.debug("The application Registration has been disabled");
              if (!OpenRegistration.isDisabled()) {
                String message = "Registration was not actually disabled";
                log.fatal(message);
                fail(message);
              } else if (OpenRegistration.isEnabled()) {
                String message = "OpenRegistration still returning possitive for isEnabled() check";
                log.fatal(message);
                fail(message);
              }
            } else {
              String message = "Admin was unable to disable Registration";
              log.fatal(message);
              fail(message);
            }
          }
        } else {
          String message = "Admin was unable to enable Registration";
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Exception Caught: " + e.toString());
    }
  }

  @Test
  public void testCsrf() {
    String userName = "configAdminTester";
    String password = userName;
    // Verify / Create user in DB
    try {
      TestProperties.verifyTestAdmin(log, applicationRoot, userName, password);
      // Sign in as Admin User
      log.debug("Signing in as User 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 {
        // Add Cookies from Response to outgoing request
        request.setCookies(response.getCookies());
        String responseBody = doThePost("wrongToken");
        if (responseBody.contains("Registration Availability Update Failure")) {
          log.debug("CSRF Error Occurred");
          if (OpenRegistration.isEnabled()) {
            String message =
                "Registration was enabled after what should have been a failed request";
            log.fatal(message);
            fail(message);
          }
        } else {
          String message = "CSRF Error Not Detectedd with Bad CSRF Token";
          log.fatal(message);
          fail(message);
        }
      }
    } catch (Exception e) {
      log.fatal("Could not Complete: " + e.toString());
      fail("Exception Caught: " + e.toString());
    }
  }
}