/*
 * Copyright 2014 LinkedIn Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package azkaban.user;

import java.util.HashSet;

import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;

import azkaban.utils.Props;
import azkaban.utils.UndefinedPropertyException;

import static org.junit.Assert.fail;

public class XmlUserManagerTest {
  private Props baseProps = new Props();

  @Before
  public void setUp() throws Exception {
  }

  @After
  public void tearDown() throws Exception {
  }

  /**
   * Testing for when the xml path isn't set in properties.
   *
   * @throws Exception
   */
  @Test
  public void testFilePropNotSet() throws Exception {
    Props props = new Props(baseProps);

    // Should throw
    try {
      @SuppressWarnings("unused")
      XmlUserManager manager = new XmlUserManager(props);
    } catch (UndefinedPropertyException e) {
      return;
    }

    fail("XmlUserManager should throw an exception when the file property isn't set");
  }

  /**
   * Testing for when the xml path doesn't exist.
   *
   * @throws Exception
   */
  @Ignore @Test
  public void testDoNotExist() throws Exception {
    Props props = new Props(baseProps);
    props.put(XmlUserManager.XML_FILE_PARAM, "unit/test-conf/doNotExist.xml");

    try {
      @SuppressWarnings("unused")
      UserManager manager = new XmlUserManager(props);
    } catch (RuntimeException e) {
      return;
    }

    fail("XmlUserManager should throw an exception when the file doesn't exist");
  }

  @Ignore @Test
  public void testBasicLoad() throws Exception {
    Props props = new Props(baseProps);
    props.put(XmlUserManager.XML_FILE_PARAM,
        "unit/test-conf/azkaban-users-test1.xml");

    UserManager manager = null;
    try {
      manager = new XmlUserManager(props);
    } catch (RuntimeException e) {
      e.printStackTrace();
      fail("XmlUserManager should've found file azkaban-users.xml");
    }

    try {
      manager.getUser("user0", null);
    } catch (UserManagerException e) {
      System.out.println("Exception handled correctly: " + e.getMessage());
    }

    try {
      manager.getUser(null, "etw");
    } catch (UserManagerException e) {
      System.out.println("Exception handled correctly: " + e.getMessage());
    }

    try {
      manager.getUser("user0", "user0");
    } catch (UserManagerException e) {
      System.out.println("Exception handled correctly: " + e.getMessage());
    }

    try {
      manager.getUser("user0", "password0");
    } catch (UserManagerException e) {
      e.printStackTrace();
      fail("XmlUserManager should've returned a user.");
    }

    User user0 = manager.getUser("user0", "password0");
    checkUser(user0, "role0", "group0");

    User user1 = manager.getUser("user1", "password1");
    checkUser(user1, "role0,role1", "group1,group2");

    User user2 = manager.getUser("user2", "password2");
    checkUser(user2, "role0,role1,role2", "group1,group2,group3");

    User user3 = manager.getUser("user3", "password3");
    checkUser(user3, "role1,role2", "group1,group2");

    User user4 = manager.getUser("user4", "password4");
    checkUser(user4, "role1,role2", "group1,group2");

    User user5 = manager.getUser("user5", "password5");
    checkUser(user5, "role1,role2", "group1,group2");

    User user6 = manager.getUser("user6", "password6");
    checkUser(user6, "role3,role2", "group1,group2");

    User user7 = manager.getUser("user7", "password7");
    checkUser(user7, "", "group1");

    User user8 = manager.getUser("user8", "password8");
    checkUser(user8, "role3", "");

    User user9 = manager.getUser("user9", "password9");
    checkUser(user9, "", "");
  }

  private void checkUser(User user, String rolesStr, String groupsStr) {
    // Validating roles
    HashSet<String> roleSet = new HashSet<String>(user.getRoles());
    if (rolesStr.isEmpty()) {
      if (!roleSet.isEmpty()) {
        String outputRoleStr = "";
        for (String role : roleSet) {
          outputRoleStr += role + ",";
        }
        throw new RuntimeException("Roles mismatch for " + user.getUserId()
            + ". Expected roles to be empty but got " + outputRoleStr);
      }
    } else {
      String outputRoleStr = "";
      for (String role : roleSet) {
        outputRoleStr += role + ",";
      }

      String[] splitRoles = rolesStr.split(",");
      HashSet<String> expectedRoles = new HashSet<String>();
      for (String role : splitRoles) {
        if (!roleSet.contains(role)) {
          throw new RuntimeException("Roles mismatch for user "
              + user.getUserId() + " role " + role + ". Expected roles to "
              + rolesStr + " but got " + outputRoleStr);
        }
        expectedRoles.add(role);
      }

      for (String role : roleSet) {
        if (!expectedRoles.contains(role)) {
          throw new RuntimeException("Roles mismatch for user "
              + user.getUserId() + " role " + role + ". Expected roles to "
              + rolesStr + " but got " + outputRoleStr);
        }
      }
    }

    HashSet<String> groupSet = new HashSet<String>(user.getGroups());
    if (groupsStr.isEmpty()) {
      if (!groupSet.isEmpty()) {
        String outputGroupStr = "";
        for (String role : roleSet) {
          outputGroupStr += role + ",";
        }
        throw new RuntimeException("Roles mismatch for " + user.getUserId()
            + ". Expected roles to be empty but got " + outputGroupStr);
      }
    } else {
      String outputGroupStr = "";
      for (String group : groupSet) {
        outputGroupStr += group + ",";
      }

      String[] splitGroups = groupsStr.split(",");
      HashSet<String> expectedGroups = new HashSet<String>();
      for (String group : splitGroups) {
        if (!groupSet.contains(group)) {
          throw new RuntimeException("Groups mismatch for user "
              + user.getUserId() + " group " + group + ". Expected groups to "
              + groupsStr + " but got " + outputGroupStr);
        }
        expectedGroups.add(group);
      }

      for (String group : groupSet) {
        if (!expectedGroups.contains(group)) {
          throw new RuntimeException("Groups mismatch for user "
              + user.getUserId() + " group " + group + ". Expected groups to "
              + groupsStr + " but got " + outputGroupStr);
        }
      }
    }

  }
}
