package com.share.mvpsdk.utils;

import android.annotation.TargetApi;
import android.app.Activity;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
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.support.v7.app.AlertDialog;

import com.bumptech.glide.Glide;
import com.bumptech.glide.request.FutureTarget;

import io.reactivex.Observable;
import io.reactivex.ObservableSource;
import io.reactivex.functions.Function;

/**
 * 图片工具类
 */
public class ImageUtils {

    /**
     * 拍照
     */
    public static final int REQUEST_CODE_FROM_CAMERA = 1 << 10;

    /**
     * 相册
     */
    public static final int REQUEST_CODE_FROM_ALBUM = 1 << 12;

    /**
     * 裁剪
     */
    public static final int REQUEST_CODE_CROP_IMAGE = 1 << 14;

    /**
     * 存放拍照图片的uri地址
     */
    public static Uri imageUriFromCamera;

    /**
     * 存放裁剪图片的uri地址
     */
    public static Uri cropImageUri;

    /**
     * 显示获取照片不同方式对话框
     */
    public static void showImagePickDialog(final Activity activity) {
        showImagePickDialog(activity, 0);
    }

    /**
     * 显示获取照片不同方式对话框
     */
    public static void showImagePickDialog(final Activity activity, final int addRequest) {
        String title = "选择获取图片方式";
        String[] items = new String[]{"拍照", "相册"};
        new AlertDialog.Builder(activity)
                .setTitle(title)
                .setItems(items, new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        switch (which) {
                            case 0:
                                pickImageFromCamera(activity, addRequest);
                                break;
                            case 1:
                                pickImageFromAlbum(activity, addRequest);
                                break;
                            default:
                                break;
                        }
                    }
                })
                .setNegativeButton("取消", null)
                .show();
    }

    /**
     * 打开相机拍照获取图片
     */
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    public static void pickImageFromCamera(final Activity activity, int addRequest) {
        // 先生成一个uri地址用于存放拍照获取的图片
        imageUriFromCamera = createImageUri(activity);

        Intent intent = new Intent();
        intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUriFromCamera);
        activity.startActivityForResult(intent, REQUEST_CODE_FROM_CAMERA + addRequest);
    }

    /**
     * 打开相机拍照获取图片
     */
    public static void pickImageFromCamera(final Activity activity) {
        pickImageFromCamera(activity, 0);
    }

    /**
     * 打开本地相册选取图片
     */
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    public static void pickImageFromAlbum(final Activity activity, int addRequest) {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_GET_CONTENT);
        intent.setType("image/*");
        activity.startActivityForResult(intent, REQUEST_CODE_FROM_ALBUM + addRequest);
    }

    /**
     * 打开本地相册选取图片
     */
    public static void pickImageFromAlbum(final Activity activity) {
        pickImageFromAlbum(activity, 0);
    }

    /**
     * 压缩图片
     *
     * @param context context
     * @param uri     图片uri
     * @param reqW    上传图片需要压缩的宽度
     * @param reqH    上传图片需要压缩的高度
     * @return 上传成功回调
     */
    public static Observable<byte[]> compressImage(final Context context,
                                                   Uri uri,
                                                   final int reqW,
                                                   final int reqH) {
        // 先从本地获取图片,利用Glide压缩图片后获取byte[]
        return Observable.just(uri)
                .flatMap(new Function<Uri, ObservableSource<byte[]>>() {
                    @Override
                    public ObservableSource<byte[]> apply(Uri uri) throws Exception {
                        // 在work线程中，同步压缩图片，然后Observable返回
                        // 即将Glide的回调封装成RxJava的Observable
                        FutureTarget<byte[]> future = Glide.with(context)
                                .load(uri)
                                .asBitmap()
                                .toBytes()
                                .into(reqW, reqH);

                        byte[] bytes;
                        try {
                            bytes = future.get();
                        } catch (Exception e) {
                            // 获取失败时，抛出runtime异常
                            // 该异常会被Subscriber捕捉，进onError
                            throw new RuntimeException(e);
                        }
                        return Observable.just(bytes);
                    }
                });
    }

    /**
     * 图片裁剪
     */
    public static void cropImage(Activity activity, Uri srcUri) {
        cropImageUri = createImageUri(activity);

        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(srcUri, "image/*");
        intent.putExtra("crop", "true");

        ////////////////////////////////////////////////////////////////
        // 1.宽高和比例都不设置时,裁剪框可以自行调整(比例和大小都可以随意调整)
        ////////////////////////////////////////////////////////////////
        // 2.只设置裁剪框宽高比(aspect)后,裁剪框比例固定不可调整,只能调整大小
        /////////////////////////////////
        // 3.裁剪后生成图片宽高(output)的设置和裁剪框无关,只决定最终生成图片大小
        ////////////////////////////////////////////////////////////////
        // 4.裁剪框宽高比例(aspect)可以和裁剪后生成图片比例(output)不同,此时,
        //	会以裁剪框的宽为准,按照裁剪宽高比例生成一个图片,该图和框选部分可能不同,
        //  不同的情况可能是截取框选的一部分,也可能超出框选部分,向下延伸补足
        ////////////////////////////////////////////////////////////////

        // aspectX aspectY 是裁剪框宽高的比例
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        // outputX outputY 是裁剪后生成图片的宽高
        //		intent.putExtra("outputX", 300);
        //		intent.putExtra("outputY", 100);

        // return-data为true时,会直接返回bitmap数据,但是大图裁剪时会出现OOM,推荐下面为false时的方式
        // return-data为false时,不会返回bitmap,但需要指定一个MediaStore.EXTRA_OUTPUT保存图片uri
        intent.putExtra("return-data", false);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, cropImageUri);

        activity.startActivityForResult(intent, REQUEST_CODE_CROP_IMAGE);
    }

    /**
     * 创建一条图片uri,用于保存拍照后的照片
     */
    private static Uri createImageUri(Context context) {
        String name = "boreImg" + System.currentTimeMillis();
        ContentValues values = new ContentValues();
        values.put(MediaStore.Images.Media.TITLE, name);
        values.put(MediaStore.Images.Media.DISPLAY_NAME, name + ".jpeg");
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
        Uri uri = context.getContentResolver().insert(MediaStore.Images.Media
                .EXTERNAL_CONTENT_URI, values);
        return uri;
    }

    /**
     * 删除一条图片
     */
    public static void deleteImageUri(Context context, Uri uri) {
        context.getContentResolver().delete(uri, null, null);
    }

    /**
     * 用第三方应用app打开图片
     */
    public static void openImageByOtherApp(Context context, Uri imageUri) {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.setDataAndType(imageUri, "image/*");
        context.startActivity(intent);
    }

    /**
     * 根据Uri获取图片绝对路径，解决Android4.4以上版本Uri转换
     */
    public static String getImageAbsolutePath19(Context context, Uri imageUri) {
        if (context == null || imageUri == null)
            return null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT
                && DocumentsContract.isDocumentUri(context, imageUri)) {
            if (isExternalStorageDocument(imageUri)) {
                String docId = DocumentsContract.getDocumentId(imageUri);
                String[] split = docId.split(":");
                String type = split[0];
                if ("primary".equalsIgnoreCase(type)) {
                    return Environment.getExternalStorageDirectory() + "/" + split[1];
                }
            } else if (isDownloadsDocument(imageUri)) {
                String id = DocumentsContract.getDocumentId(imageUri);
                Uri contentUri = ContentUris.withAppendedId(Uri.parse
                        ("content://downloads/public_downloads"), Long.valueOf(id));
                return getDataColumn(context, contentUri, null, null);
            } else if (isMediaDocument(imageUri)) {
                String docId = DocumentsContract.getDocumentId(imageUri);
                String[] split = docId.split(":");
                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;
                }
                String selection = MediaStore.Images.Media._ID + "=?";
                String[] selectionArgs = new String[]{split[1]};
                return getDataColumn(context, contentUri, selection, selectionArgs);
            }
        }

        // MediaStore (and general)
        if ("content".equalsIgnoreCase(imageUri.getScheme())) {
            // Return the remote address
            if (isGooglePhotosUri(imageUri))
                return imageUri.getLastPathSegment();
            return getDataColumn(context, imageUri, null, null);
        }
        // File
        else if ("file".equalsIgnoreCase(imageUri.getScheme())) {
            return imageUri.getPath();
        }
        return null;
    }

    private static String getDataColumn(Context context, Uri uri, String selection, String[]
            selectionArgs) {
        Cursor cursor = null;
        String column = MediaStore.Images.Media.DATA;
        String[] projection = {column};
        try {
            cursor = context.getContentResolver().query(uri, projection, selection,
                    selectionArgs, null);
            if (cursor != null && cursor.moveToFirst()) {
                int index = cursor.getColumnIndexOrThrow(column);
                return cursor.getString(index);
            }
        } finally {
            if (cursor != null)
                cursor.close();
        }
        return null;
    }

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

}