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/*
 * Copyright 2014 Objectos, Fábrica de Software LTDA.
 *
 * 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
 *
 * 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 br.com.objectos.way.io;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import br.com.objectos.comuns.io.Encoding;
import br.com.objectos.comuns.io.csv.CsvFile;
import br.com.objectos.comuns.io.csv.CsvOptions;
import br.com.objectos.comuns.io.xls.XlsFile;

import com.google.common.io.Files;
import com.google.common.io.Resources;

/**
 * @author [email protected] (Marcio Endo)
 */
class TableReaderPojo implements TableReader, CsvOptions {

  private final int skip;
  private final AbstractTableParser parser;
  private final AbstractTableFilter filter;

  private final char csvChar;
  private final boolean quoted;
  private final boolean escaped;
  private final Encoding encoding;

  public TableReaderPojo(TableReaderBuilderPojo builder) {
    this.skip = builder.getSkip();
    this.parser = builder.getParser();
    this.filter = builder.getFilter();

    this.csvChar = builder.getCsvChar();
    this.quoted = builder.isQuoted();
    this.escaped = builder.isEscaped();
    this.encoding = builder.getEncoding();
  }

  @Override
  public TableSet readFile(File file) {
    try {
      InputStream stream = Files.asByteSource(file).openStream();
      return readStream(stream);
    } catch (IOException e) {
      throw new WayIOException("Could not read table at " + file.getAbsolutePath(), e);
    }
  }

  @Override
  public TableSet readResource(String resourceName) {
    try {
      URL url = Resources.getResource(getClass(), resourceName);
      InputStream stream = Resources.asByteSource(url).openStream();
      return readStream(stream);
    } catch (IOException e) {
      throw new WayIOException("Could not read table at " + resourceName, e);
    }
  }

  @Override
  public TableSet readStream(InputStream stream) {
    try {
      XlsFile xls = XlsFile
          .parse(stream)
          .skipFirstLines(skip);

      parser.configureXls(xls);
      return new TableReaderXls(xls, parser, filter);

    } catch (IllegalArgumentException e) {
      CsvFile csv = CsvFile
          .parse(stream)
          .from(this)
          .skipFirstLines(skip);

      parser.configureCsv(csv);
      return new TableReaderCsv(csv, parser, filter);
    }
  }

  @Override
  public char getDelimiter() {
    return csvChar;
  }

  @Override
  public boolean isQuoted() {
    return quoted;
  }

  @Override
  public boolean isEscaped() {
    return escaped;
  }

  @Override
  public Encoding getEncoding() {
    return encoding;
  }

}