package com.izouma.awesomeAdmin.web;

import com.izouma.awesomeAdmin.exception.BusinessException;
import com.izouma.awesomeAdmin.utils.FileUtils;
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.util.TempFile;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import java.io.*;

@Controller
@Slf4j
public class Word2PDFController {

    @PostMapping(value = "/word2pdf", produces = "application/pdf")
    @ResponseBody
    synchronized public byte[] word2pdf(@RequestParam("file") MultipartFile file) {
        log.info("开始转换");
        // 开始时间
        long start = System.currentTimeMillis();
        ActiveXComponent app = null;
        try {
            File word = TempFile.createTempFile("word2pdf", FileUtils.getExtension(file.getOriginalFilename()));
            File target = TempFile.createTempFile("word2pdf", ".pdf");
            FileUtils.write(file.getInputStream(), word);

            app = new ActiveXComponent("Word.Application");
            Dispatch documents = app.getProperty("Documents").toDispatch();
            System.out.println("打开文件: " + word.getPath());
            Dispatch document = Dispatch.call(documents, "Open", word.getPath(), false, true).toDispatch();
            if (target.exists()) {
                target.delete();
            }
            log.info("另存为: " + target.getPath());
            Dispatch.call(document, "SaveAs", target.getPath(), 17);
            Dispatch.call(document, "Close", false);
            long end = System.currentTimeMillis();
            log.info("转换成功，用时：" + (end - start) + "ms");

            return org.apache.commons.io.FileUtils.readFileToByteArray(target);
        } catch (Exception e) {
            log.error("转换失败", e);
            throw new BusinessException("转换失败" + e.getMessage());
        } finally {
            if (app != null) {
                app.invoke("Quit", 0);
            }
        }
    }
}