/*
 * Copyright 2017-2019 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example;

import com.google.cloud.spring.vision.DocumentOcrResultSet;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;

public class OcrStatusReporter {

  private final Map<String, OcrOperationStatus> pendingOcrOperations;

  public OcrStatusReporter() {
    this.pendingOcrOperations = new HashMap<>();
  }

  public void registerFuture(
      String documentPath, CompletableFuture<DocumentOcrResultSet> resultFuture) {

    pendingOcrOperations.put(documentPath, new OcrOperationStatus(documentPath, resultFuture));
  }

  public Map<String, OcrOperationStatus> getDocumentOcrStatuses() {
    return pendingOcrOperations;
  }

  public static final class OcrOperationStatus {
    final String gcsLocation;
    final CompletableFuture<DocumentOcrResultSet> ocrResultFuture;

    public OcrOperationStatus(
        String gcsLocation, CompletableFuture<DocumentOcrResultSet> ocrResultFuture) {
      this.gcsLocation = gcsLocation;
      this.ocrResultFuture = ocrResultFuture;
    }

    public String getGcsLocation() {
      return gcsLocation;
    }

    public boolean isDone() {
      return ocrResultFuture.isDone();
    }

    public DocumentOcrResultSet getResultSet() throws ExecutionException, InterruptedException {
      return ocrResultFuture.get();
    }
  }
}
