/**
 * Copyright (c) 2016, biezhi 王爵 (biezhi.me@gmail.com)
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.blade.mvc.context;

import com.blade.kit.StringKit;
import com.blade.kit.resource.ClassPathClassReader;
import com.blade.kit.resource.ClassReader;
import com.blade.kit.resource.JarReaderImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.net.URL;
import java.util.Enumeration;

/**
 * Get ClassReader by JAR or folder
 *
 * @author <a href="mailto:biezhi.me@gmail.com" target="_blank">biezhi</a>
 * @since 1.6.6
 */
public final class DynamicContext {

    private static final Logger LOGGER = LoggerFactory.getLogger(DynamicContext.class);

    private static final ClassReader classpathReader = new ClassPathClassReader();
    private static final ClassReader jarReader = new JarReaderImpl();

    private static boolean isJarContext = false;


    private DynamicContext() {
    }

    public static void init(Class<?> clazz) {
        String rs = clazz.getResource("").toString();
        if (rs.contains(".jar")) {
            isJarContext = true;
        }
    }

    public static ClassReader getClassReader(String packageName) {
        if (isJarPackage(packageName)) {
            return jarReader;
        }
        return classpathReader;
    }

    public static boolean isJarPackage(String packageName) {
        if (StringKit.isBlank(packageName)) {
            return false;
        }
        try {
            packageName = packageName.replace(".", "/");
            Enumeration<URL> dirs = DynamicContext.class.getClassLoader().getResources(packageName);
            if (dirs.hasMoreElements()) {
                String url = dirs.nextElement().toString();
                return url.indexOf(".jar!") != -1 || url.indexOf(".zip!") != -1;
            }
        } catch (Exception e) {
            LOGGER.error("", e);
        }
        return false;
    }

    public static boolean isJarContext() {
        return isJarContext;
    }

}