package com.fzzy.api.utils;

import com.fzzy.data.ConfigData;
import org.apache.commons.lang.time.DateFormatUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Date;

/**
 * 将文件转为二进制流工具类
 * @author czt
 *
 */
@Service(FileUtils.BEAN_ID)
public class FileUtils {
	public static final String BEAN_ID = "base.fileUtil";

	@Autowired
	private ConfigData configData;


	/**
	 * 根据文件路径将文件转为二进制文件流字符串
	 * @param filePath:文件路径
	 * @return
	 */
	public static String fileToByteString(String filePath) {
		byte[] bytes = file2byte(filePath);
		return toHexString(bytes);
	}

	/**
	 * 根据文件路径将文件转为二进制数组
	 * @param filePath:文件路径
	 * @return
	 */
	public static byte[] file2byte(String filePath) {
		byte[] buffer = null;
		try {
			File file = new File(filePath);
			FileInputStream fis = new FileInputStream(file);
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			byte[] b = new byte[1024];
			int n;
			while ((n = fis.read(b)) != -1) {
				bos.write(b, 0, n);
			}
			fis.close();
			bos.close();
			buffer = bos.toByteArray();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return buffer;
	}
	
	/**
	 * 将二进制数组转为字符串
	 * @param byteArray
	 * @return
	 */
	private static String toHexString(byte[] byteArray) {
		if (byteArray == null || byteArray.length < 1)
			throw new IllegalArgumentException(
					"this byteArray must not be null or empty");

		final StringBuilder hexString = new StringBuilder();
		for (int i = 0; i < byteArray.length; i++) {
			if ((byteArray[i] & 0xff) < 0x10)// 0~F前面不零
				hexString.append("0");
			hexString.append(Integer.toHexString(0xFF & byteArray[i]));
		}
		return hexString.toString().toLowerCase();
	}

	public String getInoutFilePath(Date date) {
		if (null == date) {
			date = new Date();
		}

		String basePath = configData.getImgPath() + "INOUT/"
				+ DateFormatUtils.format(date, "yyyyMM") + "/";

		File file = new File(basePath);
		if (!file.exists()) {
			file.mkdirs();
		}

		return basePath;
	}
}