package envoy.server.processors;

import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;

import envoy.event.IssueProposal;
import envoy.server.net.ObjectWriteProxy;
import envoy.util.EnvoyLog;

/**
 * This processor handles incoming {@link IssueProposal}s and automatically
 * creates a new issue on the gitea site, if not disabled by its administrator.
 * <p>
 * Project: <strong>server</strong><br>
 * File: <strong>IssueProposalProcessor.java</strong><br>
 * Created: <strong>Aug 5, 2020</strong><br>
 *
 * @author Leon Hofmeister
 * @since Envoy Server v0.2-beta
 */
public class IssueProposalProcessor implements ObjectProcessor<IssueProposal> {

	private static boolean		issueReportingEnabled	= true;
	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 (!issueReportingEnabled) return;
		var issueDescription = issueProposal.getDescription();
		// Appending the submitter name, if this option was enabled
		issueDescription += issueProposal.getSubmitterName() != null
				? (issueDescription.endsWith("\n") || issueDescription.endsWith("<br>") ? "" : "<br>")
						+ String.format("Submitted by user %s.", issueProposal.getSubmitterName())
				: "";
		// Markdown does not support "\n". It uses "<br>"
		issueDescription = issueDescription.replaceAll("\n", "<br>");
		// We do not want any Windows artifacts to remain as that may cause problems
		issueDescription = issueDescription.replaceAll("\r", "");
		try {
			final var	url			= new URL(
					"https://git.kske.dev/api/v1/repos/zdm/envoy/issues?access_token=6d8ec2a72d64cbaf6319434aa2e7caf0130701b3");
			final var	connection	= (HttpURLConnection) url.openConnection();
			connection.setRequestMethod("POST");
			connection.setRequestProperty("Content-Type", "application/json; utf-8");
			connection.setRequestProperty("Accept", "application/json");
			connection.setDoOutput(true);

			final var json = String.format("{\"title\":\"%s\",\"body\":\"%s\",\"labels\":[240, %d]}",
					issueProposal.get(),
					issueDescription,
					// Label 240 should be user-made, label 117 bug and label 119 feature
					issueProposal.isBug() ? 117 : 119);
			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 but received status code %d - Request params:title=%s,description=%s,json=%s",
							status,
							issueProposal.get(),
							issueDescription,
							json));
		} catch (final IOException e) {
			logger.log(Level.WARNING, "An error occurred while creating an issue: ", e);
		}
	}

	/**
	 * @return whether issue reporting is enabled
	 * @since Envoy Server v0.2-beta
	 */
	public static boolean isIssueReportingEnabled() { return issueReportingEnabled; }

	/**
	 * @param issueReportingEnabled whether issue reporting should be enabled - true
	 *                              by default
	 * @since Envoy Server v0.2-beta
	 */
	public static void setIssueReportingEnabled(boolean issueReportingEnabled) {
		IssueProposalProcessor.issueReportingEnabled = issueReportingEnabled;
	}
}