package com.walker.openocr.util;

import com.walker.infrastructure.utils.FileCopyUtils;
import org.springframework.core.io.ClassPathResource;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

public class FileReaderUtils {

    public static final void saveJson2File(String json, String filePath){
        try {
            FileCopyUtils.copy(json.getBytes(), new File(filePath));
        } catch (IOException e) {
            throw new RuntimeException("json写入文件失败：" + e.getMessage(), e);
        }
    }

    public static final InputStream getClasspathInputStream(String fileName) throws IOException{
//        ClassPathResource resource = new ClassPathResource("your-file.txt");
        ClassPathResource resource = new ClassPathResource(fileName);
        return resource.getInputStream();
    }

    public static List<String> getFileLines(InputStream inputStream){
        List<String> content = new ArrayList<>(64);
        try (InputStreamReader read = new InputStreamReader(inputStream, "UTF-8");
             BufferedReader bufferedReader = new BufferedReader(read)) {
            String lineTxt;
            while ((lineTxt = bufferedReader.readLine()) != null) {
//					System.out.println(lineTxt);
                content.add(lineTxt.trim());
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("读取文件内容出错");
        }
        return content;
    }

    /**
     * 读文本内容，按行读取，返回集合。
     * @param filePath 文件绝对路径
     * @return
     */
    public static List<String> getFileLines(String filePath){
        File file = new File(filePath);
        if(!file.exists()){
            System.out.println("文件不存在，无法读取内容：" + filePath);
            return null;
        }
//		String encoding = "utf-8";
        List<String> content = new ArrayList<>(64);
        try (InputStreamReader read = new InputStreamReader(new FileInputStream(file), "UTF-8");
             BufferedReader bufferedReader = new BufferedReader(read)) {
            //判断文件是否存在
            if (file.isFile() && file.exists()) {
                String lineTxt;
                while ((lineTxt = bufferedReader.readLine()) != null) {
//					System.out.println(lineTxt);
                    content.add(lineTxt.trim());
                }
            } else {
                System.out.println("找不到指定的文件");
            }
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("读取文件内容出错");
        }
        return content;
    }

}