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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *     http://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 opennlp.tools.cmdline.dictionary;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.nio.charset.Charset;

import opennlp.tools.cmdline.BasicCmdLineTool;
import opennlp.tools.cmdline.CmdLineUtil;
import opennlp.tools.cmdline.TerminateToolException;
import opennlp.tools.dictionary.Dictionary;

public class DictionaryBuilderTool extends BasicCmdLineTool {

  interface Params extends DictionaryBuilderParams {
  }

  @Override
  public String getShortDescription() {
    return "Builds a new dictionary";
  }

  @Override
  public String getHelp() {
    return getBasicHelp(Params.class);
  }

  @Override
  public void run(String[] args) {
    Params params = validateAndParseParams(args, Params.class);

    File dictInFile = params.getInputFile();
    File dictOutFile = params.getOutputFile();
    Charset encoding = params.getEncoding();

    CmdLineUtil.checkInputFile("dictionary input file", dictInFile);
    CmdLineUtil.checkOutputFile("dictionary output file", dictOutFile);

    try (Reader in = new BufferedReader(new InputStreamReader(new FileInputStream(dictInFile), encoding));
         OutputStream out = new FileOutputStream(dictOutFile)) {

      Dictionary dict = Dictionary.parseOneEntryPerLine(in);
      dict.serialize(out);

    } catch (IOException e) {
      throw new TerminateToolException(-1, "IO error while reading training data or indexing data: "
          + e.getMessage(), e);
    }
  }
}