/*
 * Copyright 1999-2025 Alibaba Group Holding Ltd.
 *
 * 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 com.alibaba.nacos.auth.config;

import com.alibaba.nacos.common.spi.NacosServiceLoader;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.test.util.ReflectionTestUtils;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
class NacosAuthConfigHolderTest {
    
    @Mock
    NacosAuthConfig nacosAuthConfig;
    
    private Map<String, NacosAuthConfig> cachedConfigMap;
    
    @BeforeEach
    void setUp() {
        cachedConfigMap = (Map<String, NacosAuthConfig>) ReflectionTestUtils.getField(
                NacosAuthConfigHolder.getInstance(), "nacosAuthConfigMap");
        Map<String, NacosAuthConfig> mockMap = Map.of("test", nacosAuthConfig);
        ReflectionTestUtils.setField(NacosAuthConfigHolder.getInstance(), "nacosAuthConfigMap", mockMap);
    }
    
    @AfterEach
    void tearDown() {
        if (cachedConfigMap != null) {
            ReflectionTestUtils.setField(NacosAuthConfigHolder.getInstance(), "nacosAuthConfigMap", cachedConfigMap);
        }
    }
    
    @Test
    void getNacosAuthConfigByScope() {
        assertEquals(nacosAuthConfig, NacosAuthConfigHolder.getInstance().getNacosAuthConfigByScope("test"));
        assertNull(NacosAuthConfigHolder.getInstance().getNacosAuthConfigByScope("test1"));
    }
    
    @Test
    void getAllNacosAuthConfig() {
        assertEquals(1, NacosAuthConfigHolder.getInstance().getAllNacosAuthConfig().size());
        assertTrue(NacosAuthConfigHolder.getInstance().getAllNacosAuthConfig().contains(nacosAuthConfig));
    }
    
    @Test
    void isAnyAuthEnabled() {
        assertFalse(NacosAuthConfigHolder.getInstance().isAnyAuthEnabled());
        when(nacosAuthConfig.isAuthEnabled()).thenReturn(true);
        assertTrue(NacosAuthConfigHolder.getInstance().isAnyAuthEnabled());
    }
    
    @Test
    void testIsAnyAuthEnabledWithScopeFound() {
        when(nacosAuthConfig.isAuthEnabled()).thenReturn(true);
        assertTrue(NacosAuthConfigHolder.getInstance().isAnyAuthEnabled("test"));
    }
    
    @Test
    void testIsAnyAuthEnabledWithScopeNotFound() {
        assertFalse(NacosAuthConfigHolder.getInstance().isAnyAuthEnabled("nonExist"));
    }
    
    @Test
    void testIsAnyAuthEnabledWithScopeDisabled() {
        when(nacosAuthConfig.isAuthEnabled()).thenReturn(false);
        assertFalse(NacosAuthConfigHolder.getInstance().isAnyAuthEnabled("test"));
    }
    
    @Test
    void testGetNacosAuthSystemType() {
        when(nacosAuthConfig.getNacosAuthSystemType()).thenReturn("nacos");
        assertEquals("nacos", NacosAuthConfigHolder.getInstance().getNacosAuthSystemType());
    }
    
    @Test
    void testGetNacosAuthSystemTypeWhenEmpty() {
        ReflectionTestUtils.setField(NacosAuthConfigHolder.getInstance(), "nacosAuthConfigMap", Map.of());
        assertNull(NacosAuthConfigHolder.getInstance().getNacosAuthSystemType());
    }
    
    @Test
    void testConstructorWithSpiProvider()
            throws NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException {
        Map<Class<?>, Collection<Class<?>>> servicesMap = (Map<Class<?>, Collection<Class<?>>>) ReflectionTestUtils.getField(
                NacosServiceLoader.class, "SERVICES");
        List<Class<?>> classes = new LinkedList<>();
        classes.add(MockNacosAuthConfig.class);
        servicesMap.put(NacosAuthConfig.class, classes);
        try {
            Constructor<NacosAuthConfigHolder> constructor = NacosAuthConfigHolder.class.getDeclaredConstructor();
            constructor.setAccessible(true);
            NacosAuthConfigHolder holder = constructor.newInstance();
            assertEquals(1, holder.getAllNacosAuthConfig().size());
        } finally {
            servicesMap.remove(NacosAuthConfig.class);
        }
    }
    
    public static class MockNacosAuthConfig implements NacosAuthConfig {
        
        @Override
        public String getAuthScope() {
            return "mock";
        }
        
        @Override
        public boolean isAuthEnabled() {
            return false;
        }
        
        @Override
        public String getNacosAuthSystemType() {
            return "nacos";
        }
        
        @Override
        public boolean isSupportServerIdentity() {
            return false;
        }
        
        @Override
        public String getServerIdentityKey() {
            return "";
        }
        
        @Override
        public String getServerIdentityValue() {
            return "";
        }
    }
}