/* 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_SCANNING_PARAMS_H__
#define __GAP_SCANNING_PARAMS_H__

class GapScanningParams {
public:
    static const unsigned SCAN_INTERVAL_MIN = 0x0004; /**< Minimum Scan interval in 625 us units, i.e. 2.5 ms. */
    static const unsigned SCAN_INTERVAL_MAX = 0x4000; /**< Maximum Scan interval in 625 us units, i.e. 10.24 s. */
    static const unsigned SCAN_WINDOW_MIN   = 0x0004; /**< Minimum Scan window in 625 us units, i.e. 2.5 ms. */
    static const unsigned SCAN_WINDOW_MAX   = 0x4000; /**< Maximum Scan window in 625 us units, i.e. 10.24 s. */
    static const unsigned SCAN_TIMEOUT_MIN  = 0x0001; /**< Minimum Scan timeout in seconds. */
    static const unsigned SCAN_TIMEOUT_MAX  = 0xFFFF; /**< Maximum Scan timeout in seconds. */

public:
    GapScanningParams(uint16_t interval       = SCAN_INTERVAL_MAX,
                      uint16_t window         = SCAN_WINDOW_MAX,
                      uint16_t timeout        = 0,
                      bool     activeScanning = false);

    static const uint16_t UNIT_0_625_MS = 625;  /**< Number of microseconds in 0.625 milliseconds. */
    static uint16_t MSEC_TO_SCAN_DURATION_UNITS(uint32_t durationInMillis) {
        return (durationInMillis * 1000) / UNIT_0_625_MS;
    }

    ble_error_t setInterval(uint16_t newIntervalInMS);

    ble_error_t setWindow(uint16_t newWindowInMS);

    ble_error_t setTimeout(uint16_t newTimeout);

    void        setActiveScanning(bool activeScanning);

public:
    /* @Note: The following return durations in units of 0.625 ms */
    uint16_t getInterval(void) const {return _interval;}
    uint16_t getWindow(void)   const {return _window;  }

    uint16_t getTimeout(void)  const {return _timeout; }
    bool     getActiveScanning(void) const {return _activeScanning;}

private:
    uint16_t _interval; /**< Scan interval in units of 625us (between 2.5ms to 10.24s). */
    uint16_t _window;   /**< Scan window in units of 625us (between 2.5ms to 10.24s). */
    uint16_t _timeout;  /**< Scan timeout between 0x0001 and 0xFFFF in seconds, 0x0000 disables timeout. */
    bool     _activeScanning; /**< obtain not only the advertising data from the peer device, but also their scanResponse if possible. */

private:
    /* disallow copy constructor */
    GapScanningParams(const GapScanningParams &);
    GapScanningParams& operator =(const GapScanningParams &in);
};

#endif // ifndef __GAP_SCANNING_PARAMS_H__