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/*
 * 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 tech.tablesaw.io;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.StringWriter;
import java.io.Writer;

import com.google.common.io.Files;

import tech.tablesaw.api.Table;
import tech.tablesaw.io.csv.CsvWriteOptions;
import tech.tablesaw.io.csv.CsvWriter;

public class DataFrameWriter {

    private final WriterRegistry registry;
    private final Table table;

    public DataFrameWriter(WriterRegistry registry, Table table) {
	this.registry = registry;
        this.table = table;
    }

    public void toFile(String file) throws IOException {
	toFile(new File(file));
    }

    public void toFile(File file) throws IOException {
	String extension = Files.getFileExtension(file.getCanonicalPath());
	DataWriter dataWriter = registry.getWriterForExtension(extension);
	dataWriter.write(table, new Destination(file));
    }

    public void toStream(OutputStream stream, String extension) throws IOException {
	DataWriter dataWriter = registry.getWriterForExtension(extension);
	dataWriter.write(table, new Destination(stream));
    }

    public void toWriter(Writer writer, String extension) throws IOException {
	DataWriter dataWriter = registry.getWriterForExtension(extension);
	dataWriter.write(table, new Destination(writer));
    }
 
    public  void usingOptions(T options) throws IOException {
	DataWriter dataWriter = registry.getWriterForOptions(options);
	dataWriter.write(table, options);
    }

    public String toString(String extension) {
	StringWriter writer = new StringWriter();
	DataWriter dataWriter = registry.getWriterForExtension(extension);
	try {
	    dataWriter.write(table, new Destination(writer));
	} catch (IOException e) {
	    new IllegalStateException(e);
	}
	return writer.toString();
    }

    // legacy methods left for backwards compatibility

    public void csv(String file) throws IOException {
        CsvWriteOptions options = CsvWriteOptions.builder(file).build();
        new CsvWriter().write(table, options);
    }

    public void csv(File file) throws IOException {
        CsvWriteOptions options = CsvWriteOptions.builder(file).build();
        new CsvWriter().write(table, options);
    }

    public void csv(CsvWriteOptions options) {
        new CsvWriter().write(table, options);
    }

    public void csv(OutputStream stream) {
        CsvWriteOptions options = CsvWriteOptions.builder(stream).build();
        new CsvWriter().write(table, options);
    }

    public void csv(Writer writer) {
        CsvWriteOptions options = CsvWriteOptions.builder(writer).build();
        new CsvWriter().write(table, options);
    }

}