package servlets.admin.moduleManagement;

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;

import jakarta.servlet.ServletException;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
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.InstallationException;

public class OpenAllModulesIT {

  private static final Logger log = LogManager.getLogger(OpenAllModulesIT.class);
  private static final String LANGUAGE_CODE = "en_GB";
  private MockHttpServletRequest request;
  private MockHttpServletResponse response;
  private static String[] testUsers = {
    "configAdminTester", "configUserTester", "unauthenticatedUser"
  };
  private static final String MODULE_CLASS_NAME = "OpenAllModules";

  /**
   * Sets up DB with levels and users to test with
   *
   * @throws InstallationException
   * @throws SQLException
   * @throws IOException
   */
  @BeforeAll
  public static void readyDb() throws SQLException, IOException {
    testUtils.TestProperties.setTestPropertiesFileDirectory(log);

    TestProperties.ensureSchemaReady(log);
    TestProperties.reseedTestData();
    log.debug("Creating - user: " + testUsers[0] + " password: " + testUsers[0]);
    TestProperties.verifyTestAdmin(log, null, testUsers[0], testUsers[0]);
    log.debug("Creating - user: " + testUsers[1] + " password: " + testUsers[1]);
    TestProperties.verifyTestUser(log, null, testUsers[1], testUsers[0]);
  }

  @BeforeEach
  public void setUp() {
    request = new MockHttpServletRequest();
    response = new MockHttpServletResponse();
  }

  private String doMockPost(String csrfToken, String unsafe) {
    int expectedResponseCode = 302;

    log.debug("Creating " + MODULE_CLASS_NAME + " Servlet Instance");

    OpenAllModules servlet = new OpenAllModules();
    try {
      servlet.init(new MockServletConfig(MODULE_CLASS_NAME));
    } catch (ServletException e) {
      TestProperties.failAndPrint(
          "Could not initialize Servlet Instance for module "
              + MODULE_CLASS_NAME
              + ": "
              + e.toString());
    }

    // Adding Correct CSRF Token (Token Submitted)
    request.addParameter("csrfToken", csrfToken);
    request.addParameter("unsafeLevels", unsafe);

    log.debug("Running doPost");
    try {
      servlet.doPost(request, response);
    } catch (ServletException | IOException e) {
      TestProperties.failAndPrint("Could not post Servlet: " + e.toString());
    }

    assertFalse(response.getStatus() != expectedResponseCode);

    String result = "";
    try {
      result = response.getContentAsString();
    } catch (UnsupportedEncodingException e) {
      TestProperties.failAndPrint("Could not get Servlet response: " + e.toString());
    }

    return (result);
  }

  @Test
  public void testWithUserAuth() {

    log.debug("Signing in as Normal User Through LoginServlet");
    testUtils.TestProperties.loginDoPost(
        log, request, response, testUsers[1], testUsers[1], null, LANGUAGE_CODE);
    log.debug("Login Servlet Complete, Getting CSRF Token");

    String csrfToken = response.getCookie("token").getValue();
    assertFalse(csrfToken.isEmpty());

    // Add Cookies from Response to outgoing request
    request.setCookies(response.getCookies());
    String responseBody = doMockPost(csrfToken, "enable");

    assertTrue(responseBody.contains("loggedOutSheep"));
  }

  @Test
  public void testWithAdminAuthUnsafeLevelsClosed() {
    String unsafe = "disable";

    log.debug("Signing in as Admin User Through LoginServlet");
    TestProperties.loginDoPost(
        log, request, response, testUsers[0], testUsers[0], null, LANGUAGE_CODE);
    log.debug("Login Servlet Complete, Getting CSRF Token");

    String csrfToken = response.getCookie("token").getValue();
    assertFalse(csrfToken.isEmpty());

    // Add Cookies from Response to outgoing request
    request.setCookies(response.getCookies());
    String responseBody = doMockPost(csrfToken, unsafe);

    log.debug("Response Body: " + responseBody);

    assertTrue(responseBody.contains("All Modules are Now Open"));
  }

  @Test
  public void testWithAdminAuthUnsafeLevelsOpen() {
    String unsafe = "enable";

    log.debug("Signing in as Admin User Through LoginServlet");
    TestProperties.loginDoPost(
        log, request, response, testUsers[0], testUsers[0], null, LANGUAGE_CODE);
    log.debug("Login Servlet Complete, Getting CSRF Token");

    String csrfToken = response.getCookie("token").getValue();
    assertFalse(csrfToken.isEmpty());

    // Add Cookies from Response to outgoing request
    request.setCookies(response.getCookies());
    String responseBody = doMockPost(csrfToken, unsafe);

    assertTrue(responseBody.contains("[WARNING] Server is vulnerable. Unsafe levels open!"));
    assertTrue(responseBody.contains("All Modules are Now Open"));
  }

  @Test
  public void testWithUnauthenticatedUser() {
    String unsafe = "enable";

    log.debug("Signing in as Admin User Through LoginServlet");
    TestProperties.loginDoPost(
        log, request, response, testUsers[2], testUsers[2], null, LANGUAGE_CODE);
    log.debug("Login Servlet Complete, Getting CSRF Token");

    // Add Cookies from Response to outgoing request
    request.setCookies(response.getCookies());
    String responseBody = doMockPost("test", unsafe);
    assertTrue(responseBody.contains("loggedOutSheep"));
  }
}