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package com.ruoyi.common.utils.poi;
 
import cn.hutool.core.util.IdUtil;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
import com.ruoyi.common.convert.ExcelBigNumberConvert;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUtils;
import org.apache.poi.ss.formula.functions.T;
 
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
 
/**
 * Excel相关处理
 *
 * @author Lion Li
 */
public class ExcelUtil {
 
    /**
     * 对excel表单默认第一个索引名转换成list(EasyExcel)
     *
     * @param is 输入流
     * @return 转换后集合
     */
    public static <T> List<T> importExcel(InputStream is, Class<T> clazz) {
        return EasyExcel.read(is).head(clazz).autoCloseStream(false).sheet().doReadSync();
    }
 
 
    /**
     * 对excel表单默认第一个索引名转换成list(EasyExcel)
     *
     * @param is 输入流
     * @return 转换后集合
     */
    public static <T> ExcelResult<T> importExcel(InputStream is, Class<T> clazz, boolean isValidate, boolean skipException) {
        ExcelListener<T> listener = new ExcelListener<>(isValidate, skipException);
        EasyExcel.read(is, clazz, listener).sheet().doRead();
        return listener.getExcelResult();
    }
 
    /**
     * 对list数据源将其里面的数据导入到excel表单(EasyExcel)
     *
     * @param list      导出数据集合
     * @param sheetName 工作表的名称
     * @return 结果
     */
    public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, HttpServletResponse response) {
        try {
            String filename = encodingFilename(sheetName);
            response.reset();
            FileUtils.setAttachmentResponseHeader(response, filename);
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");
            ServletOutputStream os = response.getOutputStream();
            EasyExcel.write(os, clazz)
                .autoCloseStream(false)
                // 自动适配
                .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
                // 大数值自动转换 防止失真
                .registerConverter(new ExcelBigNumberConvert())
                .sheet(sheetName).doWrite(list);
        } catch (IOException e) {
            throw new RuntimeException("导出Excel异常");
        }
    }
 
    /**
     * 解析导出值 0=男,1=女,2=未知
     *
     * @param propertyValue 参数值
     * @param converterExp  翻译注解
     * @param separator     分隔符
     * @return 解析后值
     */
    public static String convertByExp(String propertyValue, String converterExp, String separator) {
        StringBuilder propertyString = new StringBuilder();
        String[] convertSource = converterExp.split(",");
        for (String item : convertSource) {
            String[] itemArray = item.split("=");
            if (StringUtils.containsAny(separator, propertyValue)) {
                for (String value : propertyValue.split(separator)) {
                    if (itemArray[0].equals(value)) {
                        propertyString.append(itemArray[1] + separator);
                        break;
                    }
                }
            } else {
                if (itemArray[0].equals(propertyValue)) {
                    return itemArray[1];
                }
            }
        }
        return StringUtils.stripEnd(propertyString.toString(), separator);
    }
 
    /**
     * 反向解析值 男=0,女=1,未知=2
     *
     * @param propertyValue 参数值
     * @param converterExp  翻译注解
     * @param separator     分隔符
     * @return 解析后值
     */
    public static String reverseByExp(String propertyValue, String converterExp, String separator) {
        StringBuilder propertyString = new StringBuilder();
        String[] convertSource = converterExp.split(",");
        for (String item : convertSource) {
            String[] itemArray = item.split("=");
            if (StringUtils.containsAny(separator, propertyValue)) {
                for (String value : propertyValue.split(separator)) {
                    if (itemArray[1].equals(value)) {
                        propertyString.append(itemArray[0] + separator);
                        break;
                    }
                }
            } else {
                if (itemArray[1].equals(propertyValue)) {
                    return itemArray[0];
                }
            }
        }
        return StringUtils.stripEnd(propertyString.toString(), separator);
    }
 
    /**
     * 编码文件名
     */
    public static String encodingFilename(String filename) {
        return IdUtil.fastSimpleUUID() + "_" + filename + ".xlsx";
    }
 
}