package com.armedia.acm.services.functionalaccess.web.api;

/*-
 * #%L
 * ACM Service: Functional Access Control
 * %%
 * Copyright (C) 2014 - 2018 ArkCase LLC
 * %%
 * This file is part of the ArkCase software. 
 * 
 * If the software was purchased under a paid ArkCase license, the terms of 
 * the paid license agreement will prevail.  Otherwise, the software is 
 * provided under the following open source license terms:
 * 
 * ArkCase is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *  
 * ArkCase is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with ArkCase. If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import static org.easymock.EasyMock.expect;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;

import com.armedia.acm.services.functionalaccess.service.FunctionalAccessService;
import com.armedia.acm.services.users.model.AcmUser;
import com.armedia.acm.services.users.model.AcmUserState;
import com.armedia.acm.services.users.model.group.AcmGroup;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.easymock.EasyMockSupport;
import org.junit.Before;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.security.core.Authentication;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.MvcResult;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * @author riste.tutureski
 */
public class GetUsersByPrivilegeAndGroupAPIControllerTest extends EasyMockSupport
{

    private Logger LOG = LogManager.getLogger(getClass());

    private MockMvc mockMvc;
    private GetUsersByPrivilegeAndGroupAPIController unit;
    private Authentication mockAuthentication;
    private FunctionalAccessService mockFunctionalAccessService;

    @Autowired
    private ExceptionHandlerExceptionResolver exceptionResolver;

    @Before
    public void setUp() throws Exception
    {
        unit = new GetUsersByPrivilegeAndGroupAPIController();
        mockMvc = MockMvcBuilders.standaloneSetup(unit).setHandlerExceptionResolvers(exceptionResolver).build();
        mockAuthentication = createMock(Authentication.class);

        mockFunctionalAccessService = createMock(FunctionalAccessService.class);
        unit.setFunctionalAccessService(mockFunctionalAccessService);
    }

    @Test
    public void usersByPrivilegeTest() throws Exception
    {

        String privilege = "acm-privilege";
        String role1 = "ROLE_ADMINISTRATOR";
        String role2 = "ROLE_INVESTIGATOR_SUPERVISOR";

        // Group 1
        Set<AcmUser> membersGroup1 = new HashSet<>();

        AcmUser user1 = new AcmUser();
        user1.setUserId("user1");

        AcmUser user2 = new AcmUser();
        user2.setUserId("user2");

        membersGroup1.addAll(Arrays.asList(user1, user2));

        AcmGroup group1 = new AcmGroup();
        group1.setName("acm_administrator_dev");
        group1.setUserMembers(membersGroup1);

        // Group 2
        Set<AcmUser> membersGroup2 = new HashSet<>();

        AcmUser user3 = new AcmUser();
        user3.setUserId("user3");
        user3.setUserState(AcmUserState.VALID);

        AcmUser user4 = new AcmUser();
        user4.setUserId("user4");
        user4.setUserState(AcmUserState.VALID);

        membersGroup2.addAll(Arrays.asList(user3, user4));

        AcmGroup group2 = new AcmGroup();
        group2.setName("acm_supervisor_dev");
        group2.setUserMembers(membersGroup2);

        List<AcmUser> expectedUserList = Arrays.asList(user1, user2, user3, user4);

        List<String> rolesForPrivilege = Arrays.asList(role1, role2);
        Map<String, List<String>> rolesToGroups = new HashMap<>();
        rolesToGroups.put(role1, Arrays.asList(group1.getName()));
        rolesToGroups.put(role2, Arrays.asList(group2.getName()));

        expect(mockAuthentication.getName()).andReturn("user");
        expect(mockFunctionalAccessService.getRolesByPrivilege(privilege)).andReturn(rolesForPrivilege);
        // this is a unit test, so we are only verifying our class returns the results it got from the
        // functional access control service. We need unit tests on the functional access control service, to
        // ensure it is working correctly.
        expect(mockFunctionalAccessService.getApplicationRolesToGroups()).andReturn(rolesToGroups);
        expect(mockFunctionalAccessService.getUsersByRolesAndGroups(rolesForPrivilege, rolesToGroups, null, null))
                .andReturn(group2.getUserMembers(true));

        replayAll();

        MvcResult result = mockMvc.perform(
                get("/api/latest/service/functionalaccess/users/{privilege}", privilege)
                        .accept(MediaType.parseMediaType("application/json;charset=UTF-8"))
                        .contentType(MediaType.APPLICATION_JSON)
                        .principal(mockAuthentication))
                .andReturn();

        verifyAll();

        LOG.info("Results: " + result.getResponse().getContentAsString());

        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        List<AcmUser> resultUserList = mapper.readValue(result.getResponse().getContentAsString(), new TypeReference<ArrayList<AcmUser>>()
        {
        });

        assertEquals(HttpStatus.OK.value(), result.getResponse().getStatus());
        assertEquals(group2.getUserMembers(true).size(), resultUserList.size());

    }

    @Test
    public void usersByPrivilegeAndGroupTest() throws Exception
    {

        String privilege = "acm-privilege";
        String role1 = "ROLE_ADMINISTRATOR";
        String role2 = "ROLE_INVESTIGATOR_SUPERVISOR";

        // Group 1
        Set<AcmUser> membersGroup1 = new HashSet<>();

        AcmUser user1 = new AcmUser();
        user1.setUserId("user1");
        user1.setUserState(AcmUserState.VALID);

        AcmUser user2 = new AcmUser();
        user2.setUserId("user2");
        user2.setUserState(AcmUserState.VALID);

        membersGroup1.addAll(Arrays.asList(user1, user2));

        AcmGroup group1 = new AcmGroup();
        group1.setName("acm_administrator_dev");
        group1.setUserMembers(membersGroup1);

        // Group 2
        Set<AcmUser> membersGroup2 = new HashSet<>();

        AcmUser user3 = new AcmUser();
        user3.setUserId("user3");

        AcmUser user4 = new AcmUser();
        user4.setUserId("user4");

        membersGroup2.addAll(Arrays.asList(user3, user4));

        AcmGroup group2 = new AcmGroup();
        group2.setName("acm_supervisor_dev");
        group2.setUserMembers(membersGroup2);

        List<AcmUser> expectedUserList = Arrays.asList(user1, user2);

        List<String> rolesForPrivilege = Arrays.asList(role1, role2);
        Map<String, List<String>> rolesToGroups = new HashMap<>();
        rolesToGroups.put(role1, Arrays.asList(group1.getName()));
        rolesToGroups.put(role2, Arrays.asList(group2.getName()));

        expect(mockAuthentication.getName()).andReturn("user");
        expect(mockFunctionalAccessService.getRolesByPrivilege("acm-privilege"))
                .andReturn(Arrays.asList("ROLE_ADMINISTRATOR", "ROLE_INVESTIGATOR_SUPERVISOR"));
        expect(mockFunctionalAccessService.getApplicationRolesToGroups()).andReturn(rolesToGroups);
        expect(mockFunctionalAccessService.getUsersByRolesAndGroups(rolesForPrivilege, rolesToGroups, group1.getName(), null))
                .andReturn(group1.getUserMembers(true));

        replayAll();

        MvcResult result = mockMvc.perform(
                get("/api/latest/service/functionalaccess/users/{privilege}/{group}", privilege, group1.getName())
                        .accept(MediaType.parseMediaType("application/json;charset=UTF-8"))
                        .contentType(MediaType.APPLICATION_JSON)
                        .principal(mockAuthentication))
                .andReturn();

        verifyAll();

        LOG.info("Results: " + result.getResponse().getContentAsString());

        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        List<AcmUser> resultUserList = mapper.readValue(result.getResponse().getContentAsString(), new TypeReference<ArrayList<AcmUser>>()
        {
        });

        assertEquals(HttpStatus.OK.value(), result.getResponse().getStatus());
        assertEquals(expectedUserList.size(), resultUserList.size());
        for (AcmUser expected : expectedUserList)
        {
            assertTrue(resultUserList.contains(expected));
        }
    }

}