package com.ltkj.web.config.pdfutils;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import com.ltkj.common.utils.DateUtils;

import java.io.IOException;
import java.util.Date;

/**
 * @Author: 西安路泰科技有限公司/lige
 * @Date: 2022/12/9 11:26
 */
public class MyHeaderFooter extends PdfPageEventHelper {
    //总页数
    PdfTemplate totalPage;
    //字体
    Font hfFont;

    {
        try {
            hfFont = new Font(BaseFont.createFont("/Font/Deng.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED), 7);
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //打开文档时，创建一个总页数的模版
    public void onOpenDocument(PdfWriter writer, Document document) {
        PdfContentByte cb = writer.getDirectContent();
        totalPage = cb.createTemplate(50, 16);
        //共 页的宽高
    }

    //一页加载完成触发，写入页眉和页脚
    public void onEndPage(PdfWriter writer, Document document) {
        //创建一个两列的表格
        PdfPTable table = new PdfPTable(2);
        try {
            table.setTotalWidth(PageSize.A4.getWidth());
            //总宽度为A4纸张宽度
            table.setLockedWidth(true);
            //锁定列宽
            table.setWidths(new int[]{50, 50});
            //设置每列宽度
            PdfPCell cell = new PdfPCell(new Phrase("第" + document.getPageNumber() + "页/", hfFont));
            cell.setHorizontalAlignment(Element.ALIGN_RIGHT);
            //设置水平右对齐
            cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            //设置垂直居中
            cell.disableBorderSide(15);//隐藏全部边框
            table.addCell(cell);
            PdfPCell cell1 = new PdfPCell(Image.getInstance(totalPage));
            //共 页
            cell1.setHorizontalAlignment(Element.ALIGN_LEFT);
            //设置水平左对齐
            cell1.setVerticalAlignment(Element.ALIGN_MIDDLE);
            //设置垂直居中
            cell1.disableBorderSide(15);//隐藏全部边框
            table.addCell(cell1);
            table.writeSelectedRows(0, -1, 0, 50, writer.getDirectContent());
        } catch (Exception e) {
            throw new ExceptionConverter(e);
        }

        //生成左侧页眉
        ColumnText.showTextAligned(writer.getDirectContent(),
                Element.ALIGN_LEFT, new Paragraph("健康体检报告"+DateUtils.getDate(), hfFont),
                document.left(), PageSize.A4.getHeight() - 30, 0);

//        //生成右侧页眉
//        ColumnText.showTextAligned(writer.getDirectContent(),
//                Element.ALIGN_RIGHT, new Paragraph(DateUtils.getDate(), hfFont),
//                document.right(), PageSize.A4.getHeight() - 30, 0);
    }

    // 全部完成后，将总页数的pdf模版写到指定位置
//    public void onCloseDocument(PdfWriter writer, Document document) {
//        String text = "共" + (writer.getPageNumber()) + "页";
//        ColumnText.showTextAligned(totalPage, Element.ALIGN_MIDDLE, new Paragraph(text, hfFont), 0, 0, 0);
//    }

}