/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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.dubbo.common.extensionloader;

import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.extension.ExtensionLoader;
import com.alibaba.dubbo.common.extensionloader.adaptive.HasAdaptiveExt;
import com.alibaba.dubbo.common.extensionloader.adaptive.impl.HasAdaptiveExt_ManualAdaptive;
import com.alibaba.dubbo.common.extensionloader.ext1.SimpleExt;
import com.alibaba.dubbo.common.extensionloader.ext2.Ext2;
import com.alibaba.dubbo.common.extensionloader.ext2.UrlHolder;
import com.alibaba.dubbo.common.extensionloader.ext3.UseProtocolKeyExt;
import com.alibaba.dubbo.common.extensionloader.ext4.NoUrlParamExt;
import com.alibaba.dubbo.common.extensionloader.ext5.NoAdaptiveMethodExt;
import com.alibaba.dubbo.common.extensionloader.ext6_inject.Ext6;
import com.alibaba.dubbo.common.extensionloader.ext6_inject.impl.Ext6Impl2;
import com.alibaba.dubbo.common.utils.LogUtil;
import junit.framework.Assert;
import org.junit.Test;

import java.util.*;

import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
import static org.junit.matchers.JUnitMatchers.containsString;

/**
 * @author ding.lid
 */
public class ExtensionLoader_Adaptive_Test {

    @Test
    public void test_useAdaptiveClass() throws Exception {
        ExtensionLoader<HasAdaptiveExt> loader = ExtensionLoader.getExtensionLoader(HasAdaptiveExt.class);
        HasAdaptiveExt ext = loader.getAdaptiveExtension();
        assertTrue(ext instanceof HasAdaptiveExt_ManualAdaptive);
    }

    @Test
    public void test_getAdaptiveExtension_defaultAdaptiveKey() throws Exception {
        {
            SimpleExt ext = ExtensionLoader.getExtensionLoader(SimpleExt.class).getAdaptiveExtension();

            Map<String, String> map = new HashMap<String, String>();
            URL url = new URL("p1", "1.2.3.4", 1010, "path1", map);

            String echo = ext.echo(url, "haha");
            assertEquals("Ext1Impl1-echo", echo);
        }

        {
            SimpleExt ext = ExtensionLoader.getExtensionLoader(SimpleExt.class).getAdaptiveExtension();

            Map<String, String> map = new HashMap<String, String>();
            map.put("simple.ext", "impl2");
            URL url = new URL("p1", "1.2.3.4", 1010, "path1", map);

            String echo = ext.echo(url, "haha");
            assertEquals("Ext1Impl2-echo", echo);
        }
    }

    @Test
    public void test_getAdaptiveExtension_customizeAdaptiveKey() throws Exception {
        SimpleExt ext = ExtensionLoader.getExtensionLoader(SimpleExt.class).getAdaptiveExtension();

        Map<String, String> map = new HashMap<String, String>();
        map.put("key2", "impl2");
        URL url = new URL("p1", "1.2.3.4", 1010, "path1", map);

        String echo = ext.yell(url, "haha");
        assertEquals("Ext1Impl2-yell", echo);

        url = url.addParameter("key1", "impl3"); // 注意: URL是值类型
        echo = ext.yell(url, "haha");
        assertEquals("Ext1Impl3-yell", echo);
    }

    @Test
    public void test_getAdaptiveExtension_protocolKey() throws Exception {
        UseProtocolKeyExt ext = ExtensionLoader.getExtensionLoader(UseProtocolKeyExt.class).getAdaptiveExtension();

        {
            String echo = ext.echo(URL.valueOf("1.2.3.4:20880"), "s");
            assertEquals("Ext3Impl1-echo", echo); // 缺省值

            Map<String, String> map = new HashMap<String, String>();
            URL url = new URL("impl3", "1.2.3.4", 1010, "path1", map);

            echo = ext.echo(url, "s");
            assertEquals("Ext3Impl3-echo", echo); // 使用第2Key, Protocol

            url = url.addParameter("key1", "impl2");
            echo = ext.echo(url, "s");
            assertEquals("Ext3Impl2-echo", echo); // 使用第1Key, key1
        }

        {

            Map<String, String> map = new HashMap<String, String>();
            URL url = new URL(null, "1.2.3.4", 1010, "path1", map);
            String yell = ext.yell(url, "s");
            assertEquals("Ext3Impl1-yell", yell); // 缺省值

            url = url.addParameter("key2", "impl2"); // 使用第2Key, key2
            yell = ext.yell(url, "s");
            assertEquals("Ext3Impl2-yell", yell);

            url = url.setProtocol("impl3"); // 使用第1Key, Protocol
            yell = ext.yell(url, "d");
            assertEquals("Ext3Impl3-yell", yell);
        }
    }

    @Test
    public void test_getAdaptiveExtension_UrlNpe() throws Exception {
        SimpleExt ext = ExtensionLoader.getExtensionLoader(SimpleExt.class).getAdaptiveExtension();

        try {
            ext.echo(null, "haha");
            fail();
        } catch (IllegalArgumentException e) {
            assertEquals("url == null", e.getMessage());
        }
    }
    
    @Test
    public void test_getAdaptiveExtension_ExceptionWhenNoAdaptiveMethodOnInterface() throws Exception {
        try {
            ExtensionLoader.getExtensionLoader(NoAdaptiveMethodExt.class).getAdaptiveExtension();
            fail();
        } catch (IllegalStateException expected) {
            assertThat(expected.getMessage(), 
                    allOf(containsString("Can not create adaptive extenstion interface com.alibaba.dubbo.common.extensionloader.ext5.NoAdaptiveMethodExt"),
                            containsString("No adaptive method on extension com.alibaba.dubbo.common.extensionloader.ext5.NoAdaptiveMethodExt, refuse to create the adaptive class")));
        }
        // 多次get,都会报错且相同
        try {
            ExtensionLoader.getExtensionLoader(NoAdaptiveMethodExt.class).getAdaptiveExtension();
            fail();
        } catch (IllegalStateException expected) {
            assertThat(expected.getMessage(), 
                    allOf(containsString("Can not create adaptive extenstion interface com.alibaba.dubbo.common.extensionloader.ext5.NoAdaptiveMethodExt"),
                            containsString("No adaptive method on extension com.alibaba.dubbo.common.extensionloader.ext5.NoAdaptiveMethodExt, refuse to create the adaptive class")));
        }
    }

    @Test
    public void test_getAdaptiveExtension_ExceptionWhenNotAdaptiveMethod() throws Exception {
        SimpleExt ext = ExtensionLoader.getExtensionLoader(SimpleExt.class).getAdaptiveExtension();

        Map<String, String> map = new HashMap<String, String>();
        URL url = new URL("p1", "1.2.3.4", 1010, "path1", map);

        try {
            ext.bang(url, 33);
            fail();
        } catch (UnsupportedOperationException expected) {
            assertThat(expected.getMessage(), containsString("method "));
            assertThat(
                    expected.getMessage(),
                    containsString("of interface com.alibaba.dubbo.common.extensionloader.ext1.SimpleExt is not adaptive method!"));
        }
    }
    
    @Test
    public void test_getAdaptiveExtension_ExceptionWhenNoUrlAttribute() throws Exception {
        try {
            ExtensionLoader.getExtensionLoader(NoUrlParamExt.class).getAdaptiveExtension();
            fail();
        } catch (Exception expected) {
            assertThat(expected.getMessage(), containsString("fail to create adative class for interface "));
            assertThat(expected.getMessage(), containsString(": not found url parameter or url attribute in parameters of method "));
        }
    }

    @Test
    public void test_urlHolder_getAdaptiveExtension() throws Exception {
        Ext2 ext = ExtensionLoader.getExtensionLoader(Ext2.class).getAdaptiveExtension();
        
        Map<String, String> map = new HashMap<String, String>();
        map.put("ext2", "impl1");
        URL url = new URL("p1", "1.2.3.4", 1010, "path1", map);
        
        UrlHolder holder = new UrlHolder();
        holder.setUrl(url);
    
        String echo = ext.echo(holder, "haha");
        assertEquals("Ext2Impl1-echo", echo);
    }

    @Test
    public void test_urlHolder_getAdaptiveExtension_noExtension() throws Exception {
        Ext2 ext = ExtensionLoader.getExtensionLoader(Ext2.class).getAdaptiveExtension();

        URL url = new URL("p1", "1.2.3.4", 1010, "path1");

        UrlHolder holder = new UrlHolder();
        holder.setUrl(url);
        
        try {
            ext.echo(holder, "haha");
            fail();
        } catch (IllegalStateException expected) {
            assertThat(expected.getMessage(), containsString("Fail to get extension("));
        }
        
        url = url.addParameter("ext2", "XXX");
        holder.setUrl(url);
        try {
            ext.echo(holder, "haha");
            fail();
        } catch (IllegalStateException expected) {
            assertThat(expected.getMessage(), containsString("No such extension"));
        }
    }

    @Test
    public void test_urlHolder_getAdaptiveExtension_UrlNpe() throws Exception {
        Ext2 ext = ExtensionLoader.getExtensionLoader(Ext2.class).getAdaptiveExtension();

        try {
            ext.echo(null, "haha");
            fail();
        } catch (IllegalArgumentException e) {
            assertEquals("com.alibaba.dubbo.common.extensionloader.ext2.UrlHolder argument == null", e.getMessage());
        }
        
        try {
            ext.echo(new UrlHolder(), "haha");
            fail();
        } catch (IllegalArgumentException e) {
            assertEquals("com.alibaba.dubbo.common.extensionloader.ext2.UrlHolder argument getUrl() == null", e.getMessage());
        }
    }

    @Test
    public void test_urlHolder_getAdaptiveExtension_ExceptionWhenNotAdativeMethod() throws Exception {
        Ext2 ext = ExtensionLoader.getExtensionLoader(Ext2.class).getAdaptiveExtension();

        Map<String, String> map = new HashMap<String, String>();
        URL url = new URL("p1", "1.2.3.4", 1010, "path1", map);

        try {
            ext.bang(url, 33);
            fail();
        } catch (UnsupportedOperationException expected) {
            assertThat(expected.getMessage(), containsString("method "));
            assertThat(
                    expected.getMessage(),
                    containsString("of interface com.alibaba.dubbo.common.extensionloader.ext2.Ext2 is not adaptive method!"));
        }
    }

    @Test
    public void test_urlHolder_getAdaptiveExtension_ExceptionWhenNameNotProvided() throws Exception {
        Ext2 ext = ExtensionLoader.getExtensionLoader(Ext2.class).getAdaptiveExtension();

        URL url = new URL("p1", "1.2.3.4", 1010, "path1");

        UrlHolder holder = new UrlHolder();
        holder.setUrl(url);
        
        try {
            ext.echo(holder, "impl1");
            fail();
        } catch (IllegalStateException expected) {
            assertThat(expected.getMessage(), containsString("Fail to get extension("));
        }
        
        url = url.addParameter("key1", "impl1");
        holder.setUrl(url);
        try {
            ext.echo(holder, "haha");
            fail();
        } catch (IllegalStateException expected) {
            assertThat(expected.getMessage(), containsString("Fail to get extension(com.alibaba.dubbo.common.extensionloader.ext2.Ext2) name from url"));
        }
    }
    
    @Test
    public void test_getAdaptiveExtension_inject() throws Exception {
        LogUtil.start();
        Ext6 ext = ExtensionLoader.getExtensionLoader(Ext6.class).getAdaptiveExtension();

        URL url = new URL("p1", "1.2.3.4", 1010, "path1");
        url = url.addParameters("ext6", "impl1");
        
        assertEquals("Ext6Impl1-echo-Ext1Impl1-echo", ext.echo(url, "ha"));
        
        Assert.assertTrue("can not find error.", LogUtil.checkNoError());
        LogUtil.stop();
        
        url = url.addParameters("simple.ext", "impl2");
        assertEquals("Ext6Impl1-echo-Ext1Impl2-echo", ext.echo(url, "ha"));
        
    }
    
    @Test
    public void test_getAdaptiveExtension_InjectNotExtFail() throws Exception {
        Ext6 ext = ExtensionLoader.getExtensionLoader(Ext6.class).getExtension("impl2");
        
        Ext6Impl2 impl = (Ext6Impl2) ext;
        assertNull(impl.getList());
    }
}