/*
 *  Copyright (c) 2016, The OpenThread Authors.
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *  3. Neither the name of the copyright holder nor the
 *     names of its contributors may be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @file
 *   This file contains definitions for adding a CLI command to the CLI server.
 */

#ifndef CLI_SERVER_HPP_
#define CLI_SERVER_HPP_

#include "openthread-core-config.h"

#include "cli/cli.hpp"

namespace ot {
namespace Cli {

/**
 * This class implements the CLI server.
 *
 */
class Server
{
public:
    explicit Server(Instance *aInstance)
        : mInterpreter(aInstance)
    {
    }

    /**
     * This method delivers raw characters to the client.
     *
     * @param[in]  aBuf        A pointer to a buffer.
     * @param[in]  aBufLength  Number of bytes in the buffer.
     *
     * @returns The number of bytes placed in the output queue.
     *
     * @retval  -1  Driver is broken.
     *
     */
    virtual int Output(const char *aBuf, uint16_t aBufLength)
    {
        OT_UNUSED_VARIABLE(aBuf);
        OT_UNUSED_VARIABLE(aBufLength);
        return -1;
    }

    /**
     * This method delivers formatted output to the client.
     *
     * @param[in]  aFormat  A pointer to the format string.
     * @param[in]  ...      A variable list of arguments to format.
     *
     * @returns The number of bytes placed in the output queue.
     *
     * @retval  -1  Driver is broken.
     *
     */
    int OutputFormat(const char *aFormat, ...);

    /**
     * This method delivers formatted output to the client.
     *
     * @param[in]  aFormat      A pointer to the format string.
     * @param[in]  aArguments   A variable list of arguments for format.
     *
     * @returns The number of bytes placed in the output queue.
     *
     */
    int OutputFormatV(const char *aFormat, va_list aArguments);

    /**
     * This method returns a reference to the interpreter object.
     *
     * @returns A reference to the interpreter object.
     *
     */
    Interpreter &GetInterpreter(void) { return mInterpreter; }

    static Server *sServer;

protected:
    enum
    {
        kMaxLineLength = OPENTHREAD_CONFIG_CLI_MAX_LINE_LENGTH,
    };

    Interpreter mInterpreter;
};

} // namespace Cli
} // namespace ot

#endif // CLI_SERVER_HPP_