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/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed 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.
*/

#ifndef __GAP_ADVERTISING_PARAMS_H__
#define __GAP_ADVERTISING_PARAMS_H__

/**************************************************************************/
/*!
    \brief
    This class provides a wrapper for the core advertising parameters,
    including the advertising type (Connectable Undirected,
    Non Connectable Undirected, etc.), as well as the advertising and
    timeout intervals.

    \par
    See the following for more information on advertising types:

    \li \c Bluetooth Core Specification 4.0 (Vol. 6), Part B, Section 2.3.1
    \li \c Bluetooth Core Specification 4.0 (Vol. 3), Part C, Section 9.3
*/
/**************************************************************************/
class GapAdvertisingParams {
public:
    static const unsigned GAP_ADV_PARAMS_INTERVAL_MIN        = 0x0020;
    static const unsigned GAP_ADV_PARAMS_INTERVAL_MIN_NONCON = 0x00A0;
    static const unsigned GAP_ADV_PARAMS_INTERVAL_MAX        = 0x4000;
    static const unsigned GAP_ADV_PARAMS_TIMEOUT_MAX         = 0x3FFF;

    /**************************************************************************/
    /*!
        \brief
        Encapsulates the peripheral advertising modes, which determine how
        the device appears to other central devices in hearing range

        \par
        See the following for more information on advertising types:

        \li \c Bluetooth Core Specification 4.0 (Vol. 6), Part B, Section 2.3.1
        \li \c Bluetooth Core Specification 4.0 (Vol. 3), Part C, Section 9.3
    */
    /**************************************************************************/
    enum AdvertisingType {
        ADV_CONNECTABLE_UNDIRECTED,     /**< Vol 3, Part C, Section 9.3.4 and Vol 6, Part B, Section 2.3.1.1 */
        ADV_CONNECTABLE_DIRECTED,       /**< Vol 3, Part C, Section 9.3.3 and Vol 6, Part B, Section 2.3.1.2 */
        ADV_SCANNABLE_UNDIRECTED,       /**< Include support for Scan Response payloads, see Vol 6, Part B, Section 2.3.1.4 */
        ADV_NON_CONNECTABLE_UNDIRECTED  /**< Vol 3, Part C, Section 9.3.2 and Vol 6, Part B, Section 2.3.1.3 */
    };

public:
    GapAdvertisingParams(AdvertisingType advType  = GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED,
                         uint16_t        interval = GAP_ADV_PARAMS_INTERVAL_MIN_NONCON,
                         uint16_t        timeout  = 0) : _advType(advType), _interval(interval), _timeout(timeout) {
        /* Interval checks */
        if (_advType == ADV_CONNECTABLE_DIRECTED) {
            /* Interval must be 0 in directed connectable mode */
            _interval = 0;
        } else if (_advType == ADV_NON_CONNECTABLE_UNDIRECTED) {
            /* Min interval is slightly larger than in other modes */
            if (_interval < GAP_ADV_PARAMS_INTERVAL_MIN_NONCON) {
                _interval = GAP_ADV_PARAMS_INTERVAL_MIN_NONCON;
            }
            if (_interval > GAP_ADV_PARAMS_INTERVAL_MAX) {
                _interval = GAP_ADV_PARAMS_INTERVAL_MAX;
            }
        } else {
            /* Stay within interval limits */
            if (_interval < GAP_ADV_PARAMS_INTERVAL_MIN) {
                _interval = GAP_ADV_PARAMS_INTERVAL_MIN;
            }
            if (_interval > GAP_ADV_PARAMS_INTERVAL_MAX) {
                _interval = GAP_ADV_PARAMS_INTERVAL_MAX;
            }
        }

        /* Timeout checks */
        if (timeout) {
            /* Stay within timeout limits */
            if (_timeout > GAP_ADV_PARAMS_TIMEOUT_MAX) {
                _timeout = GAP_ADV_PARAMS_TIMEOUT_MAX;
            }
        }
    }

    AdvertisingType getAdvertisingType(void) const {return _advType; }
    uint16_t        getInterval(void)        const {return _interval;}
    uint16_t        getTimeout(void)         const {return _timeout; }

    void setAdvertisingType(AdvertisingType newAdvType) {_advType = newAdvType;  }
    void setInterval(uint16_t newInterval)              {_interval = newInterval;}
    void setTimeout(uint16_t newTimeout)                {_timeout = newTimeout;  }

private:
    AdvertisingType _advType;
    uint16_t        _interval;
    uint16_t        _timeout;

private:
    /* disallow copy constructor */
    GapAdvertisingParams(const GapAdvertisingParams &);
};

#endif // ifndef __GAP_ADVERTISING_PARAMS_H__