package com.lf.server.helper;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.poi.xwpf.usermodel.*;

import java.io.*;
import java.util.List;
import java.util.Map;

/**
 * Word帮助类
 * @author WWW
 */
public class WordHelper {
    private final static Log log = LogFactory.getLog(WordHelper.class);

    /**
     * 通过word模板生成word的主方法
     */
    public static void generateWord(String inputFile, String outPutFile, Map<String, String> insertTextMap, List<String[]> addList) {
        try {
            FileInputStream inputStream = new FileInputStream(inputFile);
            FileOutputStream outputStream = new FileOutputStream(outPutFile);

            // 获取docx解析对象
            XWPFDocument xwpfDocument = new XWPFDocument(inputStream);

            // 处理所有文段数据，除了表格
            if (null != insertTextMap && insertTextMap.size() > 0) {
                handleParagraphs(xwpfDocument, insertTextMap);
            }

            // 处理表格数据
            handleTable(xwpfDocument, insertTextMap, addList);

            // 写入数据
            xwpfDocument.write(outputStream);

            outputStream.close();
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }

    /**
     * 处理所有文段数据，除了表格
     */
    public static void handleParagraphs(XWPFDocument xwpfDocument, Map<String, String> insertTextMap) {
        for (XWPFParagraph paragraph : xwpfDocument.getParagraphs()) {
            String text = paragraph.getText();
            if (isReplacement(text)) {
                for (XWPFRun run : paragraph.getRuns()) {
                    // 判断带有 ${} 的run
                    run.setText(matchesValue(run.text(), insertTextMap), 0);
                }
            }
        }
    }

    /**
     * 处理表格数据方法
     */
    public static void handleTable(XWPFDocument xwpfDocument, Map<String, String> map, List<String[]> addList) {
        List<XWPFTable> tables = xwpfDocument.getTables();
        for (XWPFTable table : tables) {
            List<XWPFTableRow> rows = table.getRows();
            if (rows.size() < 2) {
                continue;
            }

            if (isReplacement(table.getText())) {
                if (null == map || map.isEmpty()) {
                    continue;
                }

                replaceData(rows, map);
            } else {
                insertData(table, addList);
            }
        }
    }

    /**
     * 替换数据
     */
    private static void replaceData(List<XWPFTableRow> rows, Map<String, String> map) {
        for (XWPFTableRow row : rows) {
            List<XWPFTableCell> tableCells = row.getTableCells();
            for (XWPFTableCell tableCell : tableCells) {
                if (isReplacement(tableCell.getText())) {
                    List<XWPFParagraph> paragraphs = tableCell.getParagraphs();
                    for (XWPFParagraph paragraph : paragraphs) {
                        List<XWPFRun> runs = paragraph.getRuns();
                        for (XWPFRun run : runs) {
                            run.setText(matchesValue(tableCell.getText(), map), 0);
                        }
                    }
                }
            }
        }
    }

    /**
     * 插入数据
     */
    private static void insertData(XWPFTable table,List<String[]> addList) {
        for (int i = 1; i < addList.size(); i++) {
            XWPFTableRow row = table.createRow();
        }

        List<XWPFTableRow> rowList = table.getRows();
        for (int i = 1; i < rowList.size(); i++) {
            XWPFTableRow xwpfTableRow = rowList.get(i);
            List<XWPFTableCell> tableCells = xwpfTableRow.getTableCells();
            for (int j = 0; j < tableCells.size(); j++) {
                XWPFTableCell xwpfTableCell = tableCells.get(j);
                xwpfTableCell.setText(addList.get(i - 1)[j]);
            }
        }
    }

    /**
     * 有${}的值匹配出替换的数据，没有${}就返回原来的数据
     *
     * @param wordValue ${...} 带${}的变量
     * @param map       存储需要替换的数据
     * @return java.lang.String
     */
    public static String matchesValue(String wordValue, Map<String, String> map) {
        for (String s : map.keySet()) {
            String s1 = "${" + s + "}";
            if (s1.equals(wordValue)) {
                wordValue = map.get(s);
            }
        }

        return wordValue;
    }

    /**
     * 测试是否包含需要替换的数据
     */
    public static boolean isReplacement(String text) {
        return text.contains("$");
    }
}