package com.ld.igds.file;

import com.bstek.bdf2.core.context.ContextHolder;
import com.bstek.dorado.annotation.Expose;
import com.bstek.dorado.uploader.DownloadFile;
import com.bstek.dorado.uploader.UploadFile;
import com.bstek.dorado.uploader.annotation.FileProvider;
import com.bstek.dorado.uploader.annotation.FileResolver;
import com.ld.igds.util.ContextUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.time.DateUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLDecoder;
import java.util.Date;
import java.util.Map;

/**
 * 工单附件文件上传、下载、删除等操作
 *
 * @author Andy
 */
@Slf4j
@Component
public class ApplyOrderUploadProcessor {

    @Autowired
    private CoreFileService fileService;

    /**
     * applyOrderUploadProcessor#uploadApplyOrderFile
     *
     * @param file
     * @param parameter
     * @return fileId 新文件ID包含文件后缀
     */
    @FileResolver
    public String uploadApplyOrderFile(UploadFile file, Map<String, Object> parameter) {

        log.debug("---uploadApplyOrderFile-----{}", file.getFileName());
        String fileId = null;
        try {

            String basePath = fileService.getCommonFilePath(null);

            fileId = ContextUtil.getTimeId(1000)
                    + file.getFileName().substring(
                    file.getFileName().lastIndexOf("."));

            file.transferTo(new File(basePath + fileId));

        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return fileId;
    }

    /**
     * applyOrderUploadProcessor#uploadFile
     * 判断是否上传
     *
     * @param file
     * @param parameter
     * @return fileId 新文件ID包含文件后缀
     */
    @FileResolver
    public String uploadFile(UploadFile file, Map<String, Object> parameter) {
        String fileId = null;
        String mark = (String) parameter.get("mark");
        if ("NO_UPLOAD".equals(mark)) {
            return null;
        }
        try {

            String basePath = fileService.getCommonFilePath(null);

            fileId = ContextUtil.getTimeId(1000)
                    + file.getFileName().substring(
                    file.getFileName().lastIndexOf("."));

            file.transferTo(new File(basePath + fileId));

        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return fileId;
    }


    /**
     * applyOrderUploadProcessor#downloadApplyOrderFile 文件下载
     *
     * @param parameter
     * @return
     * @throws IOException
     */
    @FileProvider
    public DownloadFile downloadApplyOrderFile(Map<String, Object> parameter) throws Exception {
        InputStream inputStream = null;
        try {
            String info = ContextHolder.getRequest().getHeader("User-Agent");
            String fileName = (String) parameter.get("fileName");
            String fileId = (String) parameter.get("fileId");
            String timeStr = (String) parameter.get("createTime");

            Date createTime = DateUtils.parseDate(timeStr, "yyyy-MM-dd hh:mm:ss");

            if (null == createTime) createTime = new Date();

            fileName = URLDecoder.decode(fileName, "UTF-8");


            log.debug("---downloadApplyOrderFile-----{}", fileName);


            File file = new File(fileService.getCommonFilePath(createTime), fileId);

            if (!file.exists()) {
                throw new Exception("附件不存在");
            }

            inputStream = new FileInputStream(file);
            DownloadFile dlFile = new DownloadFile(fileId, inputStream);

            // 浏览器的默认编码不同,IE下BGK
            if (info.indexOf("MSIE") != -1) {
                dlFile.setFileName(new String(fileName.getBytes("GBK"), "iso-8859-1"));
            } else {// firefox、chrome、safari、opera
                dlFile.setFileName(new String(fileName.getBytes("UTF-8"), "iso-8859-1"));
            }
            return dlFile;

        } catch (Exception e) {
            if (null != inputStream)
                inputStream.close();
            log.error("下载附件执行失败：{}", e.getMessage());
        }
        return null;
    }

    /**
     * applyOrderUploadProcessor#delFile
     *
     * @param parameter
     * @return
     * @throws IOException
     */
    @Expose
    public String delFile(Map<String, Object> parameter) throws Exception {

        String fileName = (String) parameter.get("fileName");
        String fileId = (String) parameter.get("fileId");
        Date createTime = (Date) parameter.get("createTime");
        if (null == createTime) createTime = new Date();
        fileName = URLDecoder.decode(fileName, "UTF-8");
        log.debug("---delFile-----{}", fileName);

        File file = new File(fileService.getCommonFilePath(createTime), fileId);

        if (!file.exists()) {
            return "删除失败，系统未找到当前附件";
        }

        file.delete();
        fileService.delFile(fileId);
        return null;
    }

}