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package com.taobao.android.builder.tools.solib;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;
import com.taobao.android.builder.tools.MD5Util;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.filefilter.IOFileFilter;
import org.apache.commons.io.filefilter.TrueFileFilter;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A tool class for the original so file
 *
 * @author shenghua.nish 2015July 16, 2007 On the afternoon of 3:19:41
 */
public class NativeSoUtils {

    private static Logger sLogger = LoggerFactory.getLogger(NativeSoUtils.class);

    /**
     * Verify the directory of the so file under the abi
     *
     * @param supportAbis
     * @param removeSoFiles
     * @param dirs
     * @return
     */
    public static Map<String, Multimap<String, File>> getAbiSoFiles(Set<String> supportAbis, Set<String> removeSoFiles,
                                                                    List<File> dirs) {
        Map<String, Multimap<String, File>> result = new HashMap<String, Multimap<String, File>>();
        IOFileFilter filter = new NativeSoFilter(supportAbis, removeSoFiles);
        for (File dir : dirs) {
            Collection<File> files = FileUtils.listFiles(dir, filter, TrueFileFilter.TRUE);
            for (File file : files) {
                File parentFolder = file.getParentFile();
                String parentName = parentFolder.getName();
                String shortName = getSoShortName(file);
                Multimap<String, File> maps = result.get(parentName);
                if (null == maps) {
                    maps = HashMultimap.create(10, 3);
                }
                maps.put(shortName, file);
                result.put(parentName, maps);
            }

        }
        return result;
    }

    /**
     * Acquisition relative path
     *
     * @param baseDir
     * @param file
     * @return
     */
    public static String getRelativePath(File baseDir, File file) {
        return StringUtils.remove(file.getAbsolutePath(), baseDir.getAbsolutePath());
    }

    /**
     * Gets a short name after the removal version number of a so file
     *
     * @param soFile
     * @return
     */
    public static String getSoShortName(File soFile) {
        String baseName = FilenameUtils.getBaseName(soFile.getName());
        String shortName = baseName.replaceAll("-(\\d*\\.\\d*)*", "");
        return shortName + "." + FilenameUtils.getExtension(soFile.getName());
    }

    /**
     * @param localNativeLibrariesDirectory
     * @param destinationDirectory
     * @param supportAbis                   Type of architecture supported
     * @param removeSoFiles
     */
    public static void copyLocalNativeLibraries(final File localNativeLibrariesDirectory,
                                                final File destinationDirectory, Set<String> supportAbis,
                                                Set<String> removeSoFiles) {
        sLogger.info("Copying existing native libraries from " + localNativeLibrariesDirectory + " to "
                         + destinationDirectory);
        try {
            IOFileFilter filter = new NativeSoFilter(supportAbis, removeSoFiles);
            // First, determine whether there is a file of the same name, if there is a discrepancy
            Collection<File> files = FileUtils.listFiles(localNativeLibrariesDirectory, filter, TrueFileFilter.TRUE);
            List<String> dumpFiles = new ArrayList<String>();
            for (File file : files) {
                String relativePath = getRelativePath(localNativeLibrariesDirectory, file);
                File destFile = new File(destinationDirectory, relativePath);
                if (destFile.exists()) {
                    String orgFileMd5 = MD5Util.getFileMD5(file);
                    String destFileMd5 = MD5Util.getFileMD5(destFile);
                    if (!orgFileMd5.equals(destFileMd5)) {
                        dumpFiles.add(file.getAbsolutePath() + " to " + destFile.getAbsolutePath());
                    }
                }
            }
            if (dumpFiles.size() > 0) {
                throw new RuntimeException("Copy native so error,duplicate file exist!:\n"
                                               + StringUtils.join(dumpFiles, "\n"));
            }
            FileUtils.copyDirectory(localNativeLibrariesDirectory, destinationDirectory, filter);
        } catch (IOException e) {
            throw new RuntimeException("Could not copy native dependency.", e);
        }
    }
}