package com.terra.system.helper;

import com.terra.system.config.PropertiesConfig;
import com.terra.system.entity.all.SettingData;
import com.terra.common.entity.all.StaticData;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.annotation.Resource;
import org.springframework.stereotype.Component;

import java.io.File;
import java.net.URL;
import java.util.Date;

/**
 * 路径帮助类
 * @author WWW
 */
@Component
public class PathHelper {
    @Resource
    private PropertiesConfig config;

    private static int downloadPath = 1;

    private static int uploadPath = 1;

    private final static Log log = LogFactory.getLog(PathHelper.class);

    public PropertiesConfig getConfig() {
        return config;
    }

    public static int getDownloadPath() {
        return downloadPath;
    }

    public static int getUploadPath() {
        return uploadPath;
    }

    /**
     * 初始化
     */
    public void init() {
        downloadPath = getSubPath(config.getDownloadPath(), downloadPath);
        uploadPath = getSubPath(config.getUploadPath(), uploadPath);
    }

    private static int getSubPath(String parentPath, int subPath) {
        while (true) {
            String path = parentPath + File.separator + subPath;

            File file = new File(path);
            if (!file.exists() && !file.isDirectory()) {
                file.mkdirs();
                return subPath;
            }

            File[] files = file.listFiles();
            if (null == files || files.length < SettingData.MAX_FILES) {
                return subPath;
            }

            subPath++;
        }
    }

    /**
     * 获取下载完整目录
     */
    public String getDownloadFullPath() {
        downloadPath = getSubPath(config.getDownloadPath(), downloadPath);

        return config.getDownloadPath() + File.separator + downloadPath;
    }

    /**
     * 获取上传完整目录
     */
    public String getUploadFullPath() {
        uploadPath = getSubPath(config.getUploadPath(), uploadPath);

        return config.getUploadPath() + File.separator + uploadPath;
    }

    /**
     * 获取临时路径
     */
    public String getTempPath() {
        String tempName = StringHelper.YMDHMS2_FORMAT.format(new Date());
        String path = config.getTempPath() + File.separator + tempName;

        File file = new File(path);
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }

        deleteOldPath(config.getTempPath());

        return path;
    }

    /**
     * 获取临时路径
     */
    public String getTempPath(String subPath) {
        if (!StringHelper.isEmpty(subPath)) {
            String path = config.getTempPath() + File.separator + subPath;

            File file = new File(path);
            if (file.exists() && file.isDirectory()) {
                return path;
            }
        }

        deleteOldPath(config.getTempPath());

        return getTempPath();
    }

    /**
     * 获取临时路径名称
     */
    public String getTempPathName() {
        String tempName = StringHelper.YMDHMS2_FORMAT.format(new Date());
        String path = config.getTempPath() + File.separator + tempName;

        File file = new File(path);
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }

        deleteOldPath(config.getTempPath());

        return tempName;
    }

    /**
     * 删除旧路径
     */
    public void deleteOldPath(String tempPath) {
        try {
            double ran = Math.random() * 99;
            if (ran < StaticData.D90) {
                return;
            }

            File file = new File(tempPath);
            String str = StringHelper.YMD2_FORMAT.format(new Date());

            File[] files = file.listFiles();
            if (null != files) {
                for (File f : files) {
                    if (f.getPath().contains(str)) {
                        continue;
                    }

                    FileHelper.deleteFiles(f);
                }
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }

    /**
     * 获取static目录
     */
    public static String getStaticPath() {
        ClassLoader classLoader = PathHelper.class.getClassLoader();
        URL url = classLoader.getResource("");
        String path = url.getPath();

        return path.substring(0, path.indexOf("/target/classes")) + "/src/main/resources/static/";
    }
}