package org.kohsuke.github;

import javax.annotation.CheckForNull;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * {@link IOException} for http exceptions because {@link HttpURLConnection} throws un-discerned
 * {@link IOException} and it can help to know the http response code to decide how to handle an
 * http exceptions.
 *
 * @author <a href="mailto:cleclerc@cloudbees.com">Cyrille Le Clerc</a>
 */
public class HttpException extends IOException {
    static final long serialVersionUID = 1L;

    private final int responseCode;
    private final String responseMessage;
    private final String url;

    /**
     * @param message         The detail message (which is saved for later retrieval
     *                        by the {@link #getMessage()} method)
     * @param responseCode    Http response code. {@code -1} if no code can be discerned.
     * @param responseMessage Http response message
     * @param url             The url that was invoked
     * @see HttpURLConnection#getResponseCode()
     * @see HttpURLConnection#getResponseMessage()
     */
    public HttpException(String message, int responseCode, String responseMessage, String url) {
        super(message);
        this.responseCode = responseCode;
        this.responseMessage = responseMessage;
        this.url = url;
    }

    /**
     * @param message         The detail message (which is saved for later retrieval
     *                        by the {@link #getMessage()} method)
     * @param responseCode    Http response code. {@code -1} if no code can be discerned.
     * @param responseMessage Http response message
     * @param url             The url that was invoked
     * @param cause           The cause (which is saved for later retrieval by the
     *                        {@link #getCause()} method).  (A null value is permitted,
     *                        and indicates that the cause is nonexistent or unknown.)
     * @see HttpURLConnection#getResponseCode()
     * @see HttpURLConnection#getResponseMessage()
     */
    public HttpException(String message, int responseCode, String responseMessage, String url, Throwable cause) {
        super(message);
        initCause(cause);
        this.responseCode = responseCode;
        this.responseMessage = responseMessage;
        this.url = url;
    }

    /**
     * @param responseCode    Http response code. {@code -1} if no code can be discerned.
     * @param responseMessage Http response message
     * @param url             The url that was invoked
     * @param cause           The cause (which is saved for later retrieval by the
     *                        {@link #getCause()} method).  (A null value is permitted,
     *                        and indicates that the cause is nonexistent or unknown.)
     * @see HttpURLConnection#getResponseCode()
     * @see HttpURLConnection#getResponseMessage()
     */
    public HttpException(int responseCode, String responseMessage, String url, Throwable cause) {
        super("Server returned HTTP response code: " + responseCode + ", message: '" + responseMessage + "'" +
                " for URL: " + url);
        initCause(cause);
        this.responseCode = responseCode;
        this.responseMessage = responseMessage;
        this.url = url;
    }

    /**
     * @param responseCode    Http response code. {@code -1} if no code can be discerned.
     * @param responseMessage Http response message
     * @param url             The url that was invoked
     * @param cause           The cause (which is saved for later retrieval by the
     *                        {@link #getCause()} method).  (A null value is permitted,
     *                        and indicates that the cause is nonexistent or unknown.)
     * @see HttpURLConnection#getResponseCode()
     * @see HttpURLConnection#getResponseMessage()
     */
    public HttpException(int responseCode, String responseMessage, @CheckForNull URL url, Throwable cause) {
        this(responseCode, responseMessage, url == null ? null : url.toString(), cause);
    }

    /**
     * Http response code of the request that cause the exception
     *
     * @return {@code -1} if no code can be discerned.
     */
    public int getResponseCode() {
        return responseCode;
    }

    /**
     * Http response message of the request that cause the exception
     *
     * @return {@code null} if no response message can be discerned.
     */
    public String getResponseMessage() {
        return responseMessage;
    }

    /**
     * The http URL that caused the exception
     *
     * @return url
     */
    public String getUrl() {
        return url;
    }
}