package de.kreth.property2java;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.nio.charset.Charset;
import java.nio.file.Path;
import java.util.EnumSet;
import java.util.Map;

import org.apache.commons.text.WordUtils;

import de.kreth.property2java.config.Regex;

public interface Configuration {

	/**
	 * Package for generated Java Classes eg. "de.kreth.property2java". If null - no
	 * package line is generated.
	 *
	 * @return
	 */
	String getPackage();

	default Format getFormat() {
		return Format.WithUnaryOperatorParameter;
	}

	/**
	 * Filename to InputReader Entries
	 *
	 * @return
	 */
	Map<String, Reader> getInput();

	/**
	 * Path of java source folder.
	 *
	 * @return
	 */
	Path getRootPath();

	default EnumSet<GeneratorOptions> getOptions() {
		return EnumSet.noneOf(GeneratorOptions.class);
	}
	
	default Writer outWriter(String fileName) throws IOException {
		return new FileWriter(new File(getRootPath().toFile(), mapFilenameToClassName(fileName) + ".java"),
				outputCharset());
	}

	default Charset outputCharset() {
		return Charset.defaultCharset();
	}

	default String mapFilenameToClassName(String fileName) {

		String path = Regex.PATTERN.matcher(fileName).replaceAll(".").replaceAll("\\.", "_").replaceAll(" ", "_")
				.replaceAll("/", "_");
		path = WordUtils.capitalize(path, '_');
		return path;
	}

}