package com.zvalley.epp.util;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.*;
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import lombok.Cleanup;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import net.coobird.thumbnailator.Thumbnails;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.stream.Stream;

@Slf4j
public class PdfUtil {
    // 不保存待定的更改。
    private static final int wdDoNotSaveChanges = 0;
    // word转PDF 格式
    private static final int wdFormatPDF = 17;
    // 线程池队列
    private static BlockingQueue<Dispatch> dispatchPool = new LinkedBlockingQueue<>(); 
    // 线程池大小
   ​​​​​​​ private static int MAX_DISPATCH_SIZE = 10;
    

    static {
        for (int i = 0; i < MAX_DISPATCH_SIZE; i++) {
            ActiveXComponent axc = new ActiveXComponent("Word.Application");
            axc.setProperty("Visible", false);
            Dispatch dispatch = axc.getProperty("Documents").toDispatch();
            dispatchPool.add(dispatch);
        }
    }

    /**
     * @param source word路径
     * @param target 生成的pdf路径
     * @return
     */
    public static boolean word2pdf(String source, String target) {
        log.info("Word转PDF开始启动...");
        long start = System.currentTimeMillis();
        Dispatch dispatch = null;
        try {
            dispatch = getDispatch();
            Dispatch doc = Dispatch.call(dispatch, "Open", source, false, true).toDispatch();
            File toFile = new File(target);
            if (toFile.exists()) {
                toFile.delete();
            }
            Dispatch.call(doc, "SaveAs", target, wdFormatPDF);
            Dispatch.call(doc, "Close", false);
            long end = System.currentTimeMillis();
            log.info("转换完成，用时：" + (end - start) + "ms");
            return true;
        } catch (Exception e) {
            log.info("Word转PDF出错：" + e.getMessage());
            return false;
        } finally {
            if (dispatch != null) {
                relaseDispatch(dispatch);
            }
        }
    }


    @SneakyThrows
    public static Dispatch getDispatch() {
        return dispatchPool.take();
    }

    @SneakyThrows
    public static void relaseDispatch(Dispatch dispatch) {
        dispatchPool.add(dispatch);
    }
}