package com.kunfei.bookshelf.utils;

import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.storage.StorageManager;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.util.Log;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Array;
import java.lang.reflect.Method;
import java.util.ArrayList;

import androidx.annotation.NonNull;
import androidx.core.content.ContextCompat;

@SuppressLint("NewApi")
public final class FileUtils {

    private final static String TAG = "FileUtil";

    private static File getFileByPath(final String filePath) {
        return isSpace(filePath) ? null : new File(filePath);
    }

    private static boolean isSpace(final String s) {
        if (s == null) return true;
        for (int i = 0, len = s.length(); i < len; ++i) {
            if (!Character.isWhitespace(s.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    @NonNull
    public static String getSdCardPath() {
        String sdCardDirectory = Environment.getExternalStorageDirectory().getAbsolutePath();

        try {
            sdCardDirectory = new File(sdCardDirectory).getCanonicalPath();
        } catch (IOException ioe) {
            Log.e(TAG, "Could not get SD directory", ioe);
        }
        return sdCardDirectory;
    }

    public static ArrayList<String> getStorageData(Context pContext) {

        final StorageManager storageManager = (StorageManager) pContext.getSystemService(Context.STORAGE_SERVICE);

        try {
            final Method getVolumeList = storageManager.getClass().getMethod("getVolumeList");

            final Class<?> storageValumeClazz = Class.forName("android.os.storage.StorageVolume");
            final Method getPath = storageValumeClazz.getMethod("getPath");

            final Object invokeVolumeList = getVolumeList.invoke(storageManager);
            final int length = Array.getLength(invokeVolumeList);

            ArrayList<String> list = new ArrayList<>();
            for (int i = 0; i < length; i++) {
                final Object storageValume = Array.get(invokeVolumeList, i);//得到StorageVolume对象
                final String path = (String) getPath.invoke(storageValume);

                list.add(path);
            }
            return list;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    public static ArrayList<String> getExtSdCardPaths(Context con) {
        ArrayList<String> paths = new ArrayList<String>();
        File[] files = ContextCompat.getExternalFilesDirs(con, "external");
        File firstFile = files[0];
        for (File file : files) {
            if (file != null && !file.equals(firstFile)) {
                int index = file.getAbsolutePath().lastIndexOf("/Android/data");
                if (index < 0) {
                    Log.w("", "Unexpected external file dir: " + file.getAbsolutePath());
                } else {
                    String path = file.getAbsolutePath().substring(0, index);
                    try {
                        path = new File(path).getCanonicalPath();
                    } catch (IOException e) {
                        // Keep non-canonical path.
                    }
                    paths.add(path);
                }
            }
        }
        return paths;
    }

    @TargetApi(Build.VERSION_CODES.KITKAT)
    public static String getPath(final Context context, final Uri uri) {
        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

        // DocumentProvider
        if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
            // ExternalStorageProvider
            if (isExternalStorageDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }

            }
            // DownloadsProvider
            else if (isDownloadsDocument(uri)) {
                final String id = DocumentsContract.getDocumentId(uri);
                final String[] split = id.split(":");
                final String type = split[0];
                if ("raw".equalsIgnoreCase(type)) { //处理某些机型（比如Goole Pixel ）ID是raw:/storage/emulated/0/Download/c20f8664da05ab6b4644913048ea8c83.mp4
                    return split[1];
                }

                final Uri contentUri = ContentUris.withAppendedId(
                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

                return getDataColumn(context, contentUri, null, null);
            }
            // MediaProvider
            else if (isMediaDocument(uri)) {
                final String docId = DocumentsContract.getDocumentId(uri);
                final String[] split = docId.split(":");
                final String type = split[0];

                Uri contentUri = null;
                if ("image".equals(type)) {
                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
                } else if ("video".equals(type)) {
                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
                } else if ("audio".equals(type)) {
                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                }

                final String selection = "_id=?";
                final String[] selectionArgs = new String[]{
                        split[1]
                };

                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {

            // Return the remote address
            if (isGooglePhotosUri(uri))
                return uri.getLastPathSegment();

            return getDataColumn(context, uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }

        return null;
    }

    public static String getDataColumn(Context context, Uri uri, String selection,
                                       String[] selectionArgs) {

        final String column = "_data";
        final String[] projection = {
                column
        };

        try (Cursor cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
                null)) {
            if (cursor != null && cursor.moveToFirst()) {
                final int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is ExternalStorageProvider.
     */
    public static boolean isExternalStorageDocument(Uri uri) {
        return "com.android.externalstorage.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is DownloadsProvider.
     */
    public static boolean isDownloadsDocument(Uri uri) {
        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is MediaProvider.
     */
    public static boolean isMediaDocument(Uri uri) {
        return "com.android.providers.media.documents".equals(uri.getAuthority());
    }

    /**
     * @param uri The Uri to check.
     * @return Whether the Uri authority is Google Photos.
     */
    public static boolean isGooglePhotosUri(Uri uri) {
        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
    }

    public int copy(String fromFile, String toFile) {
        //要复制的文件目录
        File[] currentFiles;
        File root = new File(fromFile);
        //如同判断SD卡是否存在或者文件是否存在
        //如果不存在则 return出去
        if (!root.exists()) {
            return -1;
        }
        //如果存在则获取当前目录下的全部文件 填充数组
        currentFiles = root.listFiles();

        //目标目录
        File targetDir = new File(toFile);
        //创建目录
        if (!targetDir.exists()) {
            targetDir.mkdirs();
        }
        //遍历要复制该目录下的全部文件
        for (int i = 0; i < currentFiles.length; i++) {
            if (currentFiles[i].isDirectory())//如果当前项为子目录 进行递归
            {
                copy(currentFiles[i].getPath() + "/", toFile + currentFiles[i].getName() + "/");

            } else//如果当前项为文件则进行文件拷贝
            {
                CopySdcardFile(currentFiles[i].getPath(), toFile + currentFiles[i].getName());
            }
        }
        return 0;
    }

    //文件拷贝
    //要复制的目录下的所有非子目录(文件夹)文件拷贝
    public int CopySdcardFile(String fromFile, String toFile) {

        try {
            InputStream fosfrom = new FileInputStream(fromFile);
            OutputStream fosto = new FileOutputStream(toFile);
            byte bt[] = new byte[1024];
            int c;
            while ((c = fosfrom.read(bt)) > 0) {
                fosto.write(bt, 0, c);
            }
            fosfrom.close();
            fosto.close();
            return 0;

        } catch (Exception ex) {
            return -1;
        }
    }

}