/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.guacamole.protocol;

/**
 * All possible statuses returned by various Guacamole instructions, each having
 * a corresponding code.
 * 
 * @author Michael Jumper
 */
public enum GuacamoleStatus {

    /**
     * The operation succeeded.
     */
    SUCCESS(200, 1000, 0x0000),

    /**
     * The requested operation is unsupported.
     */
    UNSUPPORTED(501, 1011, 0x0100),

    /**
     * The operation could not be performed due to an internal failure.
     */
    SERVER_ERROR(500, 1011, 0x0200),

    /**
     * The operation could not be performed as the server is busy.
     */
    SERVER_BUSY(503, 1008, 0x0201),

    /**
     * The operation could not be performed because the upstream server is not
     * responding.
     */
    UPSTREAM_TIMEOUT(504, 1011, 0x0202),

    /**
     * The operation was unsuccessful due to an error or otherwise unexpected
     * condition of the upstream server.
     */
    UPSTREAM_ERROR(502, 1011, 0x0203),

    /**
     * The operation could not be performed as the requested resource does not
     * exist.
     */
    RESOURCE_NOT_FOUND(404, 1002, 0x0204),

    /**
     * The operation could not be performed as the requested resource is already
     * in use.
     */
    RESOURCE_CONFLICT(409, 1008, 0x0205),

    /**
     * The operation could not be performed because bad parameters were given.
     */
    CLIENT_BAD_REQUEST(400, 1002, 0x0300),

    /**
     * Permission was denied to perform the operation, as the user is not yet
     * authorized (not yet logged in, for example). As HTTP 401 has implications
     * for HTTP-specific authorization schemes, this status continues to map to
     * HTTP 403 ("Forbidden"). To do otherwise would risk unintended effects.
     */
    CLIENT_UNAUTHORIZED(403, 1008, 0x0301),

    /**
     * Permission was denied to perform the operation, and this operation will
     * not be granted even if the user is authorized.
     */
    CLIENT_FORBIDDEN(403, 1008, 0x0303),

    /**
     * The client took too long to respond.
     */
    CLIENT_TIMEOUT(408, 1002, 0x0308),

    /**
     * The client sent too much data.
     */
    CLIENT_OVERRUN(413, 1009, 0x030D),

    /**
     * The client sent data of an unsupported or unexpected type.
     */
    CLIENT_BAD_TYPE(415, 1003, 0x030F),

    /**
     * The operation failed because the current client is already using too
     * many resources.
     */
    CLIENT_TOO_MANY(429, 1008, 0x031D);

    /**
     * The most applicable HTTP error code.
     */
    private final int http_code;

    /**
     * The most applicable WebSocket error code.
     */
    private final int websocket_code;
    
    /**
     * The Guacamole protocol status code.
     */
    private final int guac_code;

    /**
     * Initializes a GuacamoleStatusCode with the given HTTP and Guacamole
     * status/error code values.
     * 
     * @param http_code The most applicable HTTP error code.
     * @param websocket_code The most applicable WebSocket error code.
     * @param guac_code The Guacamole protocol status code.
     */
    private GuacamoleStatus(int http_code, int websocket_code, int guac_code) {
        this.http_code = http_code;
        this.websocket_code = websocket_code;
        this.guac_code = guac_code;
    }

    /**
     * Returns the most applicable HTTP error code.
     * 
     * @return The most applicable HTTP error code.
     */
    public int getHttpStatusCode() {
        return http_code;
    }

    /**
     * Returns the most applicable HTTP error code.
     * 
     * @return The most applicable HTTP error code.
     */
    public int getWebSocketCode() {
        return websocket_code;
    }

    /**
     * Returns the corresponding Guacamole protocol status code.
     * 
     * @return The corresponding Guacamole protocol status code.
     */
    public int getGuacamoleStatusCode() {
        return guac_code;
    }

    /**
     * Returns the GuacamoleStatus corresponding to the given Guacamole
     * protocol status code. If no such GuacamoleStatus is defined, null is
     * returned.
     *
     * @param code
     *     The Guacamole protocol status code to translate into a
     *     GuacamoleStatus.
     *
     * @return
     *     The GuacamoleStatus corresponding to the given Guacamole protocol
     *     status code, or null if no such GuacamoleStatus is defined.
     */
    public static GuacamoleStatus fromGuacamoleStatusCode(int code) {

        // Search for a GuacamoleStatus having the given status code
        for (GuacamoleStatus status : values()) {
            if (status.getGuacamoleStatusCode() == code)
                return status;
        }

        // No such status found
        return null;

    }

}
