package safeluck.drive.evaluation.util;

import android.app.Application;
import android.content.Context;
import android.content.res.Resources;
import android.os.Environment;
import android.util.Log;

import com.anyun.exam.lib.MyLog;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;

public class FileUtil {
    private static final String TAG = "FileUtil";
    /**
     * 读取assert目录下 txt文本文件内容
     * @param context
     * @param assetFileName
     * @return
     */
    public static StringBuffer readAssetTxtFile(Context context, String assetFileName) {
        String lineTxt = null;
        StringBuffer stringBuffer = new StringBuffer();
        try {
            InputStream inputStream = null;
            try {
                inputStream = context.getAssets()
                        .open(assetFileName);
            } catch (IOException e) {
                e.printStackTrace();
            }

            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            while((lineTxt = bufferedReader.readLine()) != null){
                System.out.println(lineTxt);
                stringBuffer.append(lineTxt);

            }
            inputStreamReader.close();
            bufferedReader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return stringBuffer;
    }

    public static void createdirs(Context context){
        String dir = Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+context.getPackageName();

        File file = new File(dir);
        if (!file.exists()){
            file.mkdir();
        }else{
            Log.i(TAG, "createdirs: 目录已经存在");
        }

    }

    public static StringBuffer readTxtFileFromSD(Context context,String fileName){
        String lineTxt = null;
        StringBuffer stringBuffer = new StringBuffer();
        try {
            InputStream inputStream = null;
            String dir = Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+context.getPackageName();
            File file = new File(dir,fileName);
            if (!file.exists()){
                MyLog.d(TAG,fileName+"文件不存在");
                return null;
            }
            try {
                inputStream = new FileInputStream(file);
            } catch (IOException e) {
                e.printStackTrace();
            }

            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            while((lineTxt = bufferedReader.readLine()) != null){
                System.out.println(lineTxt);
                stringBuffer.append(lineTxt);

            }
            inputStreamReader.close();
            bufferedReader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return stringBuffer;
    }

    /**
     *
     * @param fromFile 源文件路径包括文件名（绝对路径）
     * @param toFile
     */
    public static void copyFile(String fromFile,String toFile){

        try {
            InputStream inputStream =new FileInputStream(fromFile);
            OutputStream outputStream = new FileOutputStream(toFile);
            byte[] bytes = new byte[1024];
            while ((inputStream.read(bytes))>0){
                outputStream.write(bytes);
            }
            inputStream.close();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    /**
     * 拷贝assert目录下的文件到 安装包目录下
     * @param context
     * @param assertfileName
     */
    public static void copyAssertFileToSD(Context context,String assertfileName){
        try {
            InputStream inputStream = null;
            try {
                inputStream = context.getAssets()
                        .open(assertfileName);
            } catch (IOException e) {
                e.printStackTrace();
            }
            OutputStream outputStream = new FileOutputStream(  new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+context.getPackageName(), assertfileName));
            byte[] bytes = new byte[1024];
            while ((inputStream.read(bytes))>0){
                outputStream.write(bytes);
            }
            inputStream.close();
            outputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}