package envoy.server.processors;

import static envoy.server.Startup.config;

import java.io.IOException;
import java.net.*;
import java.util.logging.*;

import envoy.event.IssueProposal;
import envoy.util.EnvoyLog;

import envoy.server.net.ObjectWriteProxy;

/**
 * This processor handles incoming {@link IssueProposal}s and automatically creates a new issue on
 * the gitea site, if not disabled by its administrator.
 *
 * @author Leon Hofmeister
 * @since Envoy Server v0.2-beta
 */
public final class IssueProposalProcessor implements ObjectProcessor<IssueProposal> {

	private static final Logger logger = EnvoyLog.getLogger(IssueProposalProcessor.class);

	@Override
	public void process(IssueProposal issueProposal, long socketID, ObjectWriteProxy writeProxy)
		throws IOException {
		// Do nothing if manually disabled
		if (!config.isIssueReportingEnabled())
			return;
		try {
			final var	url			= new URL(config.getIssueReportingURL());
			final var	connection	= (HttpURLConnection) url.openConnection();
			connection.setRequestMethod("POST");
			connection.setRequestProperty("Content-Type", "application/json; utf-8");
			connection.setRequestProperty("Accept", "application/json");
			// Two types of authorization are currently supported: access token as
			// query param or access token as authorization header
			final var authenticationToken = config.getIssueAuthToken();
			if (!authenticationToken.equals("")) {
				final String auth = "token " + authenticationToken;
				connection.setRequestProperty("Authorization", auth);
			}
			connection.setDoOutput(true);

			final var json = String.format("{\"title\":\"%s\",\"body\":\"%s\",\"labels\":[%s, %s]}",
				issueProposal.get(),
				issueProposal.getDescription(),
				config.getUserMadeLabel(),
				issueProposal.isBug() ? config.getBugLabel() : config.getFeatureLabel());
			try (final var os = connection.getOutputStream()) {
				final byte[] input = json.getBytes("utf-8");
				os.write(input, 0, input.length);
			}
			final var status = connection.getResponseCode();
			if (status == 201)
				logger.log(Level.INFO, "Successfully created an issue");
			else
				logger.log(Level.WARNING,
					String.format(
						"Tried creating an issue for %s but received status code %d - Request params:%s",
						url, status, json));
		} catch (final IOException e) {
			logger.log(Level.WARNING, "An error occurred while creating an issue: ", e);
		}
	}
}