package com.terra.system.helper;

import com.terra.common.helper.StringHelper;
import net.lingala.zip4j.ZipFile;
import net.lingala.zip4j.exception.ZipException;
import net.lingala.zip4j.model.ZipParameters;
import net.lingala.zip4j.model.enums.AesKeyStrength;
import net.lingala.zip4j.model.enums.CompressionLevel;
import net.lingala.zip4j.model.enums.CompressionMethod;
import net.lingala.zip4j.model.enums.EncryptionMethod;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.io.File;
import java.nio.charset.StandardCharsets;

/**
 * Zip4j帮助类
 * @author WWW
 */
public class Zip4jHelper {
    private final static Log log = LogFactory.getLog(Zip4jHelper.class);

    /**
     * Zip压缩
     *
     * @param zipFile    zip文件
     * @param sourcePath 源路径
     * @param pwd        密码
     * @return 成功是否
     */
    public static boolean zip(String zipFile, String sourcePath, String pwd) {
        try {
            ZipFile zip = StringHelper.isEmpty(pwd) ? new ZipFile(zipFile) : new ZipFile(zipFile, pwd.toCharArray());
            zip.setCharset(StandardCharsets.UTF_8);

            File f = zip.getFile();
            if (!f.getParentFile().exists()) {
                f.getParentFile().mkdirs();
            }
            if (f.exists()) {
                f.delete();
            }

            ZipParameters params = getZipParams(!StringHelper.isEmpty(pwd));

            // 要打包的文件或文件夹
            File currentFile = new File(sourcePath);
            if (currentFile.isDirectory()) {
                zip.addFolder(currentFile, params);
            } else {
                zip.addFile(currentFile, params);
            }

            return true;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return false;
        }
    }

    /**
     * 创建ZipFile
     */
    public static ZipFile createZipFile(String zipFile, String pwd) {
        try {
            ZipFile zip = StringHelper.isEmpty(pwd) ? new ZipFile(zipFile) : new ZipFile(zipFile, pwd.toCharArray());
            // zip.setCharset(Charset.forName("GBK"))
            zip.setCharset(StandardCharsets.UTF_8);

            File f = zip.getFile();
            if (!f.getParentFile().exists()) {
                f.getParentFile().mkdirs();
            }
            if (f.exists()) {
                f.delete();
            }

            return zip;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return null;
        }
    }

    /**
     * 获取ZipParameters
     */
    public static ZipParameters getZipParams(boolean hasPwd) {
        // 设置压缩文件参数
        ZipParameters params = new ZipParameters();
        // 压缩方式
        params.setCompressionMethod(CompressionMethod.DEFLATE);
        // 压缩级别
        params.setCompressionLevel(CompressionLevel.MAXIMUM);

        if (hasPwd) {
            // 是否设置加密文件
            params.setEncryptFiles(true);
            // 设置AES加密强度：KEY_STRENGTH_256
            params.setAesKeyStrength(AesKeyStrength.KEY_STRENGTH_128);
            // 设置加密算法
            params.setEncryptionMethod(EncryptionMethod.AES);
        }

        return params;
    }

    /**
     * 添加文件至压缩包
     *
     * @param zip    ZipFile
     * @param params ZipParameters
     * @param file   File
     * @throws ZipException
     */
    private static void addZipFile(ZipFile zip, ZipParameters params, File file) throws ZipException {
        if (file.isDirectory()) {
            File[] files = file.listFiles();
            for (File f : files) {
                addZipFile(zip, params, f);
            }
        } else {
            zip.addFile(file, params);
        }
    }

    /**
     * Zip解压
     *
     * @param zipFile  zip文件
     * @param toPath   解压路径
     * @param password 密码
     * @return 成功是/否
     */
    public static boolean unzip(String zipFile, String toPath, String password) {
        try {
            // 生成的压缩文件
            ZipFile zip = new ZipFile(zipFile);

            // 设置密码
            if (!StringHelper.isEmpty(password)) {
                zip.setPassword(password.toCharArray());
            }

            // 解压缩所有文件以及文件夹
            zip.extractAll(toPath);

            return true;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return false;
        }
    }
}