package com.infoloop.tianting.utils;

import lombok.extern.slf4j.Slf4j;
import org.apache.poi.util.IOUtils;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.Arrays;

/**
 * 图片处理工具类
 */
@Slf4j
public class ImageUtil {
    public static byte[] getImage(String imagePath) {
        final var is = getFile(imagePath);
        if (is == null) {
            log.error("getImage failed; url:{}", imagePath);
            return null;
        }
        try {
            return IOUtils.toByteArray(is);
        } catch (Exception e) {
            log.error("getImage error", e);
            return null;
        } finally {
            IOUtils.closeQuietly(is);
        }
    }

    public static InputStream getFile(String imagePath) {
        try {
            byte[] result = readFile(imagePath);
            if (result == null) {
                return null;
            }
            result = Arrays.copyOf(result, result.length);
            return new ByteArrayInputStream(result);
        } catch (Exception e) {
            log.error("getFile error", e);
        }
        return null;
    }

    /**
     * 读取文件为字节数据
     *
     * @param url 地址
     * @return 字节数据
     */
    public static byte[] readFile(String url) {
        InputStream in = null;
        try {
            if (url.startsWith("http")) {
                URL urlObj = new URL(url);
                URLConnection urlConnection = urlObj.openConnection();
                urlConnection.setConnectTimeout(30 * 1000);
                urlConnection.setReadTimeout(60 * 1000);
                urlConnection.setDoInput(true);
                in = urlConnection.getInputStream();
            } else {
                // TODO 本地地址
                return null;
            }
            return IOUtils.toByteArray(in);
        } catch (IOException e) {
            log.error("readFile error", e);
            return null;
        } finally {
            IOUtils.closeQuietly(in);
        }
    }
}