package be.nikiroo.fanfix.supported;

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

import be.nikiroo.fanfix.Instance;
import be.nikiroo.fanfix.data.MetaData;

/**
 * Support class for <tt>.info</tt> text files ({@link Text} files with a
 * <tt>.info</tt> metadata file next to them).
 * <p>
 * The <tt>.info</tt> file is supposed to be written by this program, or
 * compatible.
 * 
 * @author niki
 */
class InfoText extends Text {
	@Override
	public String getSourceName() {
		return "info-text";
	}

	@Override
	protected MetaData getMeta(URL source, InputStream in) throws IOException {
		try {
			MetaData meta = InfoReader.readMeta(new File(new File(source
					.toURI()).getPath() + ".info"));

			// Some old .info files don't have those now required fields...
			String test = meta.getTitle() == null ? "" : meta.getTitle();
			test += meta.getAuthor() == null ? "" : meta.getAuthor();
			test += meta.getDate() == null ? "" : meta.getDate();
			test += meta.getUrl() == null ? "" : meta.getUrl();
			if (test.isEmpty()) {
				MetaData superMeta = super.getMeta(source, reset(in));
				if (meta.getTitle() == null || meta.getTitle().isEmpty()) {
					meta.setTitle(superMeta.getTitle());
				}
				if (meta.getAuthor() == null || meta.getAuthor().isEmpty()) {
					meta.setAuthor(superMeta.getAuthor());
				}
				if (meta.getDate() == null || meta.getDate().isEmpty()) {
					meta.setDate(superMeta.getDate());
				}
				if (meta.getUrl() == null || meta.getUrl().isEmpty()) {
					meta.setUrl(superMeta.getUrl());
				}
			}

			return meta;

		} catch (URISyntaxException e) {
			throw new IOException("Cannot parse URL to file: " + source, e);
		}
	}

	@Override
	protected boolean supports(URL url) {
		if ("file".equals(url.getProtocol())) {
			File file;
			try {
				file = new File(url.toURI());
				file = new File(file.getPath() + ".info");
			} catch (URISyntaxException e) {
				Instance.syserr(e);
				file = null;
			}

			return file != null && file.exists();
		}

		return false;
	}
}