/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.syncope.core.provisioning.java;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.util.Set;
import org.apache.syncope.common.lib.to.Provision;
import org.apache.syncope.common.lib.types.AnyTypeKind;
import org.apache.syncope.common.lib.types.CipherAlgorithm;
import org.apache.syncope.core.persistence.api.attrvalue.PlainAttrValidationManager;
import org.apache.syncope.core.persistence.api.dao.AnyTypeClassDAO;
import org.apache.syncope.core.persistence.api.dao.ExternalResourceDAO;
import org.apache.syncope.core.persistence.api.dao.GroupDAO;
import org.apache.syncope.core.persistence.api.dao.RealmSearchDAO;
import org.apache.syncope.core.persistence.api.dao.UserDAO;
import org.apache.syncope.core.persistence.api.entity.EntityFactory;
import org.apache.syncope.core.persistence.api.entity.ExternalResource;
import org.apache.syncope.core.persistence.api.entity.user.LinkedAccount;
import org.apache.syncope.core.persistence.api.entity.user.User;
import org.apache.syncope.core.provisioning.api.MappingManager;
import org.identityconnectors.common.security.SecurityUtil;
import org.identityconnectors.framework.common.objects.Attribute;
import org.identityconnectors.framework.common.objects.AttributeUtil;
import org.identityconnectors.framework.common.objects.OperationalAttributes;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.util.ReflectionTestUtils;
import org.springframework.transaction.annotation.Transactional;

@Transactional
public class DefaultMappingManagerTest extends AbstractTest {

    @Autowired
    private MappingManager mappingManager;

    @Autowired
    private UserDAO userDAO;

    @Autowired
    private ExternalResourceDAO resourceDAO;

    @Autowired
    private RealmSearchDAO realmSearchDAO;

    @Autowired
    private GroupDAO groupDAO;

    @Autowired
    private AnyTypeClassDAO anyTypeClassDAO;

    @Autowired
    private EntityFactory entityFactory;

    @Autowired
    private PlainAttrValidationManager validator;

    @Test
    public void prepareAttrsForUser() {
        User bellini = userDAO.findByUsername("bellini").orElseThrow();
        ExternalResource ldap = resourceDAO.findById("resource-ldap").orElseThrow();
        Provision provision = ldap.getProvisionByAnyType(AnyTypeKind.USER.name()).orElseThrow();

        assertNotEquals(CipherAlgorithm.AES, bellini.getCipherAlgorithm());

        // 1. with clear-text password
        MappingManager.PreparedAttrs attrs = mappingManager.prepareAttrsFromAny(
                bellini,
                "Password123",
                true,
                Boolean.TRUE,
                ldap,
                provision);
        assertEquals("bellini", attrs.connObjectLink());
        assertEquals(
                "uid=bellini,ou=people,o=isp",
                AttributeUtil.getNameFromAttributes(attrs.attributes()).getNameValue());
        assertEquals("Password123", SecurityUtil.decrypt(AttributeUtil.getPasswordValue(attrs.attributes())));

        // 2. with changePwd == false
        attrs = mappingManager.prepareAttrsFromAny(
                bellini,
                "Password123",
                false,
                Boolean.TRUE,
                ldap,
                provision);
        assertNull(AttributeUtil.getPasswordValue(attrs.attributes()));

        // 3. with no clear-text password but random password generation enabled
        // after SYNCOPE-1751 no password is going to be generated by DefaultMappingManager,
        // but by AbstractPropagationTaskExecutor
        ldap = resourceDAO.save(ldap);
        entityManager.flush();

        attrs = mappingManager.prepareAttrsFromAny(
                bellini,
                null,
                true,
                Boolean.TRUE,
                ldap,
                provision);
        assertNull(AttributeUtil.getPasswordValue(attrs.attributes()));

        // 4. with no clear-text password and random password generation disabled
        resourceDAO.save(ldap);
        entityManager.flush();

        attrs = mappingManager.prepareAttrsFromAny(
                bellini,
                null,
                true,
                Boolean.TRUE,
                ldap,
                provision);
        assertNull(AttributeUtil.getPasswordValue(attrs.attributes()));

        // 5. with no clear-text password, random password generation disabled but AES
        ReflectionTestUtils.setField(bellini, "cipherAlgorithm", CipherAlgorithm.AES);
        bellini.setPassword("newPassword123");
        userDAO.save(bellini);
        entityManager.flush();

        assertEquals(CipherAlgorithm.AES, bellini.getCipherAlgorithm());

        attrs = mappingManager.prepareAttrsFromAny(
                bellini,
                null,
                true,
                Boolean.TRUE,
                ldap,
                provision);
        assertEquals("newPassword123", SecurityUtil.decrypt(AttributeUtil.getPasswordValue(attrs.attributes())));
    }

    @Test
    public void prepareAttrsForLinkedAccount() {
        User vivaldi = userDAO.findByUsername("vivaldi").orElseThrow();
        ExternalResource ldap = resourceDAO.findById("resource-ldap").orElseThrow();
        Provision provision = ldap.getProvisionByAnyType(AnyTypeKind.USER.name()).orElseThrow();

        LinkedAccount account = entityFactory.newEntity(LinkedAccount.class);
        account.setConnObjectKeyValue("admin");
        account.setResource(ldap);
        account.setOwner(vivaldi);
        account.setSuspended(Boolean.FALSE);
        account.setCipherAlgorithm(CipherAlgorithm.AES);
        account.setPassword("Password321");
        vivaldi.add(account);

        vivaldi = userDAO.save(vivaldi);
        entityManager.flush();

        // 1. with account password and clear-text default password
        Set<Attribute> attrs = mappingManager.prepareAttrsFromLinkedAccount(
                vivaldi,
                account,
                "Password123",
                true,
                provision);
        assertEquals("admin", AttributeUtil.getStringValue(AttributeUtil.find("cn", attrs)));
        assertEquals("Password321", SecurityUtil.decrypt(AttributeUtil.getPasswordValue(attrs)));
        assertTrue(AttributeUtil.getBooleanValue(AttributeUtil.find(OperationalAttributes.ENABLE_NAME, attrs)));

        // 2. without account password and clear-text default password
        account.setEncodedPassword(null, null);

        attrs = mappingManager.prepareAttrsFromLinkedAccount(
                vivaldi,
                account,
                "Password123",
                true,
                provision);
        assertEquals("Password123", SecurityUtil.decrypt(AttributeUtil.getPasswordValue(attrs)));

        // 3. with changePwd == false
        attrs = mappingManager.prepareAttrsFromLinkedAccount(
                vivaldi,
                account,
                "Password123",
                false,
                provision);
        assertNull(AttributeUtil.getPasswordValue(attrs));

        // 4. without account password, no clear-text password but random password generation enabled
        // after SYNCOPE-1751 no password is going to be generated by DefaultMappingManager,
        // but by AbstractPropagationTaskExecutor
        ldap = resourceDAO.save(ldap);
        entityManager.flush();

        attrs = mappingManager.prepareAttrsFromLinkedAccount(
                vivaldi,
                account,
                null,
                true,
                provision);
        assertNull(AttributeUtil.getPasswordValue(attrs));

        // 5. without account password, no clear-text password and random password generation disabled
        resourceDAO.save(ldap);
        entityManager.flush();

        attrs = mappingManager.prepareAttrsFromLinkedAccount(
                vivaldi,
                account,
                null,
                true,
                provision);
        assertNull(AttributeUtil.getPasswordValue(attrs));
    }
}
