import lombok.extern.slf4j.Slf4j;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * @Description E文件工具类
 */
@Slf4j
public class EFileUtils {

    /**
     * 读字符串
     * @param text 内容
     * @param node 节点
     * @return
     */
    public static List<List<String>> readText(String text, String node) {
        try {
            int startIndex = 0;
            int thisIndex = 0;
            int endIndex = 0;
            boolean flag = false;

            text = text.substring(text.indexOf("<" + node), text.indexOf("</" + node) + node.length() + 2);
            String[] lines = text.split("\\r?\\n");
            List<List<String>> listDatas = new ArrayList<List<String>>();
            for (int i = 0; i < lines.length; i++) {
                if (flag) break;
                thisIndex++;
                if (lines[i].startsWith("<" + node)) {
                    startIndex = thisIndex;
                } else if (lines[i].startsWith("</" + node)) {
                    endIndex = thisIndex;
                    flag = true;
                } else if (startIndex != 0) {
                    String[] split = lines[i].split("\\s+");
                    List<String> lineDatas = new ArrayList<String>(Arrays.asList(split));
                    lineDatas.remove(0);//
                    listDatas.add(lineDatas);
                }
            }
            log.info(node + "节点标签在第" + startIndex + "-" + endIndex);
            return listDatas;
        } catch (Exception e) {
            log.error(e.getMessage());
        }
        return null;
    }

    /**
     * 读文件
     * path 读取的文件路径
     * node E文件里的节点名称
     */
    public static List<List<String>> readEFile(String path, String node) {
        try {
            int startIndex = 0;
            int thisIndex = 0;
            int endIndex = 0;
            boolean flag = false;
            //文件内容的字符集 UTF8
            BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(path), StandardCharsets.UTF_8));
            String line = reader.readLine();
            List<List<String>> listDatas = new ArrayList<List<String>>();
            while ((line = reader.readLine()) != null && !flag) {
                thisIndex++;
                if (line.startsWith("<" + node)) {
                    startIndex = thisIndex;
                } else if (line.startsWith("</" + node)) {
                    endIndex = thisIndex;
                    flag = true;
                } else if (startIndex != 0) {
                    String[] split = line.split("\\s+");
                    List<String> lineDatas = new ArrayList<String>(Arrays.asList(split));
                    lineDatas.remove(0);//
                    listDatas.add(lineDatas);
                }
            }
            log.info(node + "节点标签在第" + startIndex + "-" + endIndex);
            reader.close();
            return listDatas;
        } catch (IOException e) {
            log.error(e.getMessage());
        }
        return null;
    }

    /**
     * 写文件
     *
     * @param txtInfo 内容
     * @param filePath 文件路径
     * @throws IOException
     */
    public static void writeTxt(String txtInfo, String filePath) throws IOException {
        File file = new File(filePath);
        if (!file.exists()) {
            file.getParentFile().mkdirs();
        }
        file.createNewFile();
        // write 解决中文乱码问题
        // FileWriter fw = new FileWriter(file, true);
        // 写入文件的字符集 GBK 看需求而设定
        OutputStreamWriter fw = new OutputStreamWriter(new FileOutputStream(file), StandardCharsets.UTF_8);
        BufferedWriter bw = new BufferedWriter(fw);
        bw.write(txtInfo);
        bw.flush();
        bw.close();
        fw.close();
    }

}