package froala.editor.utils.view;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.tika.Tika;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.servlet.view.AbstractView;

import egovframework.com.cmm.util.EgovResourceCloseHelper;
import egovframework.rte.fdl.cmmn.exception.EgovBizException;

@Component
public class DownloadView extends AbstractView {
	private final static Logger LOGGER = LoggerFactory.getLogger(DownloadView.class);

	@Override
	protected void renderMergedOutputModel(Map<String, Object> model,
			HttpServletRequest request, HttpServletResponse response) throws EgovBizException, IOException {
		String path = (String) model.get("path");
		String mime = (String) model.get("mime");

		File file = new File(path);

		response.setContentLength((int)file.length());

		String filename = (String) model.get("origin_file_nm");
		String userAgent = request.getHeader("User-Agent");
		String conVstr = null;

		if (userAgent.contains("MSIE")) {
			conVstr = URLEncoder.encode(filename,"UTF-8");
		} else if (userAgent.contains("Trident")) {
			conVstr = URLEncoder.encode(filename,"UTF-8");
		} else if(userAgent.contains("Chrome")) {
			conVstr = new String(filename.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
		} else if(userAgent.contains("Opera")) {
			conVstr = new String(filename.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
		} else if (userAgent.contains("Mozilla")){
			conVstr = new String(filename.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
		} else {
			conVstr = new String(filename.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
		}

		// PDF 파일일 경우 바로 열기
		Tika tika = new Tika();
		mime = mime == null ? tika.detect(file) : mime;
		switch (mime) {
		// pdf로 다운로드 받도록 하기 위해 주석
//		case "application/pdf":
//			response.setContentType("application/pdf");
//			break;

		default:
			response.setHeader("Content-Disposition", "attachment; fileName=\"" + conVstr + "\";");
			response.setContentType("application/octet-stream;charset=UTF-8");
			break;
		}
		response.setHeader("Content-Transfer-Encoding", "binary");

		OutputStream out = response.getOutputStream();
		FileInputStream fis = null;

		try{
			fis = new FileInputStream(file);
			FileCopyUtils.copy(fis, out);
		} finally {
			EgovResourceCloseHelper.close(fis);
		}
		out.flush();
	}
}