/*
 * Copyright Cypress Semiconductor Corporation, 2014-2015 All rights reserved.
 *
 * This software, associated documentation and materials ("Software") is
 * owned by Cypress Semiconductor Corporation ("Cypress") and is
 * protected by and subject to worldwide patent protection (UnitedStates and foreign), United States copyright laws and international
 * treaty provisions. Therefore, unless otherwise specified in a separate license agreement between you and Cypress, this Software
 * must be treated like any other copyrighted material. Reproduction,
 * modification, translation, compilation, or representation of this
 * Software in any other form (e.g., paper, magnetic, optical, silicon)
 * is prohibited without Cypress's express written permission.
 *
 * Disclaimer: THIS SOFTWARE IS PROVIDED AS-IS, WITH NO WARRANTY OF ANY
 * KIND, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
 * NONINFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes
 * to the Software without notice. Cypress does not assume any liability
 * arising out of the application or use of Software or any product or
 * circuit described in the Software. Cypress does not authorize its
 * products for use as critical components in any products where a
 * malfunction or failure may reasonably be expected to result in
 * significant injury or death ("High Risk Product"). By including
 * Cypress's product in a High Risk Product, the manufacturer of such
 * system or application assumes all risk of such use and in doing so
 * indemnifies Cypress against all liability.
 *
 * Use of this Software may be limited by and subject to the applicable
 * Cypress software license agreement.
 *
 *
 */

#import "BPModel.h"
#import "CBMoralManager.h"
#import "Constants.h"

/*!
 *  @class BPModel
 *
 *  @discussion Class to handle the blood pressure service related operations
 *
 */

@interface BPModel ()<cbCharacteristicManagerDelegate>
{
    void(^cbCharacteristicHandler)(BOOL success, NSError *error);
    void(^cbcharacteristicDiscoverHandler)(BOOL success, NSError *error);
    
    CBCharacteristic *bpCharacteristic;
}

@end

@implementation BPModel

/*!
 *  @method startDiscoverChar:
 *
 *  @discussion Discovers the specified characteristics of a service..
 */

-(void)startDiscoverChar:(void (^) (BOOL success, NSError *error))handler
{
    cbcharacteristicDiscoverHandler = handler;
    
    [[CBMoralManager sharedManager] setCbCharacteristicDelegate:self];
    [[[CBMoralManager sharedManager] myPeripheral] discoverCharacteristics:nil forService:[[CBMoralManager sharedManager] myService]];
}

/*!
 *  @method updateCharacteristicWithHandler:
 *
 *  @discussion Sets notifications or indications for the value of a specified characteristic.
 */
-(void)updateCharacteristicWithHandler:(void (^) (BOOL success, NSError *error))handler
{
    cbCharacteristicHandler = handler;
    
    if (bpCharacteristic)
    {
        [Utilities logDataWithService:[ResourceHandler getServiceNameForUUID:BP_SERVICE_UUID] characteristic:[ResourceHandler getCharacteristicNameForUUID:BP_MEASUREMENT_CHARACTERISTIC_UUID] descriptor:nil operation:START_NOTIFY];
        
        [[[CBMoralManager sharedManager] myPeripheral] setNotifyValue:YES forCharacteristic:bpCharacteristic];
    }
    
}

/*!
 *  @method stopUpdate
 *
 *  @discussion Stop notifications or indications for the value of a specified characteristic.
 */


-(void)stopUpdate
{
    cbCharacteristicHandler = nil;
    
    if (bpCharacteristic)
    {
        if (bpCharacteristic.isNotifying)
        {
            [[[CBMoralManager sharedManager] myPeripheral] setNotifyValue:NO forCharacteristic:bpCharacteristic];
            
            [Utilities logDataWithService:[ResourceHandler getServiceNameForUUID:BP_SERVICE_UUID] characteristic:[ResourceHandler getCharacteristicNameForUUID:BP_MEASUREMENT_CHARACTERISTIC_UUID] descriptor:nil operation:STOP_NOTIFY];
        }
        
    }
}



#pragma mark - characteristicManager delegate

/*!
 *  @method peripheral: didDiscoverCharacteristicsForService: error:
 *
 *  @discussion Method invoked when characteristics are discovered for a service
 *
 */

-(void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
    if ([service.UUID isEqual:BP_SERVICE_UUID])
    {
        for (CBCharacteristic *aChar in service.characteristics)
        {
            // Checking for required characteristic
            if ([aChar.UUID isEqual:BP_MEASUREMENT_CHARACTERISTIC_UUID])
            {
                bpCharacteristic = aChar;
                cbcharacteristicDiscoverHandler(YES,nil);
            }
        }
    }
    
}

/*!
 *  @method peripheral: didUpdateValueForCharacteristic: error:
 *
 *  @discussion Method invoked when the characteristic value changes
 *
 */

-(void) peripheral:(CBPeripheral *)peripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
{
    if ([characteristic.UUID isEqual:BP_MEASUREMENT_CHARACTERISTIC_UUID])
    {
        if (error == nil)
        {
            [self getBloodPressureDataFromChar:characteristic];
            cbCharacteristicHandler(YES,nil);
        }
        else
        {
            cbCharacteristicHandler(NO,error);
        }
    }
}


/*!
 *  @method getBloodPressureDataFromChar:
 *
 *  @discussion   Instance method to get the blood pressure value
 *
 */
-(void) getBloodPressureDataFromChar:(CBCharacteristic *)characteristic
{
    NSData *data = [characteristic value];
    const uint8_t *reportData = (uint8_t *)[data bytes];
    
    // Checking the flag
    
    if (!(reportData[0] & 0x00))
    {
        // BP details in units of mmHg
        _bloodPressureUnitString = BLOOD_PRESSURE_UNIT_mmHg;
        
    }
    else
    {
        //BP details in units of kPa
        _bloodPressureUnitString = BLOOD_PRESSURE_UNIT_kPa;
    }
    
    _systolicPressureValue = CFSwapInt16LittleToHost(*(uint16_t *) &reportData[1]);
    _diastolicPressureValue =  CFSwapInt16LittleToHost(*(uint16_t *) &reportData[3]);
    
    if (cbCharacteristicHandler != nil) {
        cbCharacteristicHandler(YES,nil);
    }
    
     [Utilities logDataWithService:[ResourceHandler getServiceNameForUUID:characteristic.service.UUID] characteristic:[ResourceHandler getCharacteristicNameForUUID:characteristic.UUID] descriptor:nil operation:[NSString stringWithFormat:@"%@%@ %@",NOTIFY_RESPONSE,DATA_SEPERATOR,[Utilities convertDataToLoggerFormat:data]]];
}

@end