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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2011-2016 Incapture Technologies LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package reflex.file;

import java.util.ArrayList;
import java.util.List;

import reflex.IReflexIOHandler;
import reflex.IReflexLineCallback;
import reflex.node.io.FileReadAdapter;
import reflex.value.ReflexStreamValue;
import reflex.value.ReflexValue;
import reflex.value.internal.ReflexVoidValue;

import com.google.common.net.MediaType;

public class CSVFileReadAdapter implements FileReadAdapter {
    private String fieldSep = ",";

    public CSVFileReadAdapter(String param1, String param2) {
        if (param1 != null) {
            fieldSep = param1;
        }
    }

    @Override
    public ReflexValue readContent(ReflexStreamValue file, IReflexIOHandler ioHandler) {
        // The file is a series of CSV records
        final List valArray = new ArrayList();

        ioHandler.forEachLine(file, new IReflexLineCallback() {

            @Override
            public ReflexValue callback(String line) {
                if (line.isEmpty()) {
                    return new ReflexVoidValue();
                }
                String[] splits = line.split(fieldSep);
                List lineArray = new ArrayList();
                for (String s : splits) {
                    lineArray.add(new ReflexValue(s));
                }
                valArray.add(new ReflexValue(lineArray));
                return new ReflexVoidValue();
            }

        });

        return new ReflexValue(valArray);
    }

    @Override
    public MediaType getMimeType() {
        return MediaType.CSV_UTF_8;
    }

}