package com.basic.security.utils;

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.util.Log;

import com.basic.security.base.BaseApplication;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
//import io.reactivex.Observable;
//import io.reactivex.ObservableEmitter;
//import io.reactivex.ObservableOnSubscribe;
//import io.reactivex.Observer;
//import io.reactivex.android.schedulers.AndroidSchedulers;
//import io.reactivex.disposables.Disposable;
//import io.reactivex.schedulers.Schedulers;

/**
 * Created by EN on 2016/8/27.
 */
public class FileUtils {
    public static File getCacheDir() {
        File file = BaseApplication.getApplication().getCacheDir();
        return getDir(file);
    }

    public static File getFilesDir() {
        File file = BaseApplication.getApplication().getFilesDir();
        return getDir(file);
    }

    public static File getExternalCacheDir() {
        File file = null;
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            file = BaseApplication.getApplication().getExternalCacheDir();
        }
        return getDir(file);
    }

    public static File getExternalFilesDir() {
        File file = null;
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            file = BaseApplication.getApplication().getExternalFilesDir(null);
        }
        return getDir(file);
    }

    public static File getExternalStorageDir() {
        File file = null;
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            file = Environment.getExternalStorageDirectory();
        }
        return getDir(file);
    }

    public static File getExternalStoragePublicDir(String type) {
        File file = null;
//        DIRECTORY_MUSIC, DIRECTORY_PODCASTS, DIRECTORY_RINGTONES, DIRECTORY_ALARMS,
//        DIRECTORY_NOTIFICATIONS, DIRECTORY_PICTURES, DIRECTORY_MOVIES, DIRECTORY_DOWNLOADS,
//        DIRECTORY_DCIM, or DIRECTORY_DOCUMENTS
        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            file = Environment.getExternalStoragePublicDirectory(type);
        }
        return getDir(file);
    }

    public static File getDir(File file) {
        if (file == null) {
            return null;
        }
        if (file.isFile()) {
            file.delete();
        }
        if (!file.exists()) {
            file.mkdir();
        }
        return file;
    }

    //小米手机不可用
    public static String getPath(Context context, Uri uri) {
        if ("content".equalsIgnoreCase(uri.getScheme())) {
            String[] projection = {"_data"};
            Cursor cursor = null;
            try {
                cursor = context.getContentResolver().query(uri, null, null, null, null);
                String cs[] = cursor.getColumnNames();
                int i = 0;
                cursor.moveToFirst();
                for (String s : cs) {
                    Log.i("column", s + ":" + cursor.getString(i));
                    if ("_data".equals(s)) {
                        return cursor.getString(i);
                    } else if ("document_id".equals(s)) {
                        String path = cursor.getString(i);
                        if (path.startsWith("raw:")) {
                            return cursor.getString(i).split(":")[1];
                        }
                    }
                    i++;
                }
                int column_index = cursor.getColumnIndexOrThrow("_data");
                if (cursor.moveToFirst()) {
                    return cursor.getString(column_index);
                }
            } catch (Exception e) {
                // Eat it  Or Log it.
            } finally {
                if (!cursor.isClosed()) {
                    cursor.close();
                }
            }
        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
        return null;
    }

    public static InputStream getInputStream(Context context, Uri uri) {
        try {
            return context.getContentResolver().openInputStream(uri);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        return null;
    }

    public static String getPathFormUri(Uri uri) {
        String path;
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) {
            path = getPath(uri);
        } else {
            path = getRealPathFromURI(uri);
        }
        return path;
    }

    //    public static void writeFile(final File file, final String data, final CallBack callBack) {
//        Observable.create(new ObservableOnSubscribe<Object>() {
//            
//            public void subscribe(ObservableEmitter<Object> emitter) throws Exception {
//                try {
//                    if (!file.exists()) {
//                        if (!file.createNewFile()) {
//                            emitter.onError(new Throwable("文件创建失败"));
//                        }
//                    }
//                    FileOutputStream fileOutputStream = new FileOutputStream(file);
//                    fileOutputStream.write(data.getBytes());
//                    emitter.onNext("ok");
//                    fileOutputStream.flush();
//                    fileOutputStream.close();
//                    emitter.onComplete();
//                } catch (FileNotFoundException e) {
//                    emitter.onError(e);
//                    e.printStackTrace();
//                } catch (IOException e) {
//                    emitter.onError(e);
//                    e.printStackTrace();
//                }
//            }
//        }).subscribeOn(Schedulers.io())
//                .observeOn(AndroidSchedulers.mainThread())
//                .subscribe(new Observer<Object>() {
//                    private Disposable disposable;
//
//                    
//                    public void onSubscribe(Disposable d) {
//                        disposable = d;
//                    }
//
//                    
//                    public void onNext(Object o) {
//                        callBack.onSuccess(o.toString());
//                        dispose(disposable);
//                    }
//
//                    
//                    public void onError(Throwable e) {
//                        callBack.onFailure(e.getMessage());
//                        dispose(disposable);
//                    }
//
//                    
//                    public void onComplete() {
//                        dispose(disposable);
//                    }
//                });
//
//
//    }
//
//    public static void readFile(final File file, final CallBack callBack) {
//        Observable.create(new ObservableOnSubscribe<Object>() {
//            
//            public void subscribe(ObservableEmitter<Object> emitter) throws Exception {
//                try {
//                    FileReader fileReader = new FileReader(file);
//                    StringBuilder stringBuilder = new StringBuilder();
//                    char[] chars = new char[100];
//                    int length;
//                    while ((length = fileReader.read(chars)) != -1) {
//                        stringBuilder.append(chars, 0, length);
//                    }
////                    System1.out.println(stringBuilder.toString());
//                    fileReader.close();
//                    emitter.onNext(stringBuilder.toString());
//                    emitter.onComplete();
//                } catch (FileNotFoundException e) {
//                    emitter.onError(e);
//                    e.printStackTrace();
//                } catch (IOException e) {
//                    emitter.onError(e);
//                    e.printStackTrace();
//                }
//            }
//        }).subscribeOn(Schedulers.io())
//                .observeOn(AndroidSchedulers.mainThread())
//                .subscribe(new Observer<Object>() {
//                    private Disposable disposable;
//
//                    
//                    public void onSubscribe(Disposable d) {
//                        disposable = d;
//                    }
//
//                    
//                    public void onNext(Object o) {
//                        callBack.onSuccess(o.toString());
//                        dispose(disposable);
//                    }
//
//                    
//                    public void onError(Throwable e) {
//                        callBack.onFailure(e.getMessage());
//                        dispose(disposable);
//                    }
//
//                    
//                    public void onComplete() {
//                        dispose(disposable);
//                    }
//                });
//
//
//    }
//
//    private static void dispose(Disposable disposable) {
//        if (disposable != null && !disposable.isDisposed()) {
//            disposable.dispose();
//        }
//    }
    public static String getPath(final Uri uri) {
        // DocumentProvider
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(BaseApplication.getApplication(), 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 Uri contentUri = ContentUris.withAppendedId(
//                        Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
//                return getDataColumn(context, contentUri, null, null);
                final String[] split = id.split(":");
                return split[1];
            }
            // 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 getDataColumn2(contentUri, selection, selectionArgs);
            }
        }
        // MediaStore (and general)
        else if ("content".equalsIgnoreCase(uri.getScheme())) {
            return getDataColumn2(uri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(uri.getScheme())) {
            return uri.getPath();
        }
        return null;
    }

    public static String getRealPathFromURI(Uri contentUri) {
        String res = null;
        String[] proj = {MediaStore.Images.Media.DATA};
        Cursor cursor = BaseApplication.getApplication().getContentResolver().query(contentUri, proj, null, null, null);
        if (null != cursor && cursor.moveToFirst()) {
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            res = cursor.getString(column_index);
            cursor.close();
        }
        return res;
    }

    /**
     * Get the value of the data column for this Uri. This is useful for
     * MediaStore Uris, and other file-based ContentProviders.
     *
     * @param uri           The Uri to query.
     * @param selection     (Optional) Filter used in the query.
     * @param selectionArgs (Optional) Selection arguments used in the query.
     * @return The value of the _data column, which is typically a file path.
     */
    public static String getDataColumn2(Uri uri, String selection,
                                        String[] selectionArgs) {
        Cursor cursor = null;
        final String column = "_data";
        final String[] projection = {column};
        try {
            cursor = BaseApplication.getApplication().getContentResolver()
                    .query(uri, projection, selection, selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                final int column_index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(column_index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        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());
    }

    /**
     * 解决小米手机上获取图片路径为null的情况
     *
     * @param intent
     * @return
     */
    public Uri getImageUri(Context context, android.content.Intent intent) {
        Uri uri = intent.getData();
        String type = intent.getType();
        if (uri.getScheme().equals("file") && (type.contains("image/"))) {
            String path = uri.getEncodedPath();
            if (path != null) {
                path = Uri.decode(path);
                ContentResolver cr = context.getContentResolver();
                StringBuffer buff = new StringBuffer();
                buff.append("(").append(MediaStore.Images.ImageColumns.DATA).append("=")
                        .append("'" + path + "'").append(")");
                Cursor cur = cr.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                        new String[]{MediaStore.Images.ImageColumns._ID},
                        buff.toString(), null, null);
                int index = 0;
                for (cur.moveToFirst(); !cur.isAfterLast(); cur.moveToNext()) {
                    index = cur.getColumnIndex(MediaStore.Images.ImageColumns._ID);
                    // set _id value
                    index = cur.getInt(index);
                }
                if (index == 0) {
                    // do nothing
                } else {
                    Uri uri_temp = Uri
                            .parse("content://media/external/images/media/"
                                    + index);
                    if (uri_temp != null) {
                        uri = uri_temp;
                    }
                }
            }
        }
        return uri;
    }
}