/*
 * Copyright (c) 2019, Livio, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following
 * disclaimer in the documentation and/or other materials provided with the
 * distribution.
 *
 * Neither the name of the Livio Inc. nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package com.smartdevicelink.util;

import android.support.annotation.NonNull;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.nio.file.Files;

public class FileUtls {
    private static final String TAG = "FileUtls";

    /**
     * When using on Android, this method should only be used for Android Oreo and newer
     * @param file the path to the file
     * @return a byte array representation of the file if one exists
     */
    public static byte[] getFileData(String file){
        return getFileData(file,null);
    }

    /**
     * When using on Android, this method should only be used for Android Oreo and newer
     * @param filePath the path to the file
     * @param fileName the name of the file
     * @return a byte array representation of the file if one exists
     */
    public static byte[] getFileData(String filePath, String fileName){
        if(filePath != null && filePath.length() > 0) {
            File file;
            if(fileName != null && fileName.length() > 0 ){
                file = new File(filePath, fileName);
            }else{
                file = new File(filePath);
            }
            if (file.exists() && file.isFile() && file.canRead()) {
                try {
                   return Files.readAllBytes(file.toPath());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

        return null;
    }

    public static byte[] downloadFile(@NonNull String urlStr){
        try {
            URL url = new URL(urlStr);
            URLConnection connection = url.openConnection();
            InputStream inputStream = connection.getInputStream();
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();

            int nRead;
            byte[] data = new byte[4096];

            while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
                buffer.write(data, 0, nRead);
            }
            return buffer.toByteArray();
        }catch (Exception e){
            DebugTool.logError(TAG, "Unable to download file - " + urlStr, e);
            return null;
        }
    }
}