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/**
 * Copyright (c) 2015 Digi International Inc.,
 * All rights not expressly granted are reserved.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Digi International Inc. 11001 Bren Road East, Minnetonka, MN 55343
 * =======================================================================
 */

#if !defined(__XBEE_802_H_)
#define __XBEE_802_H_

#include "FrameHandlers/FH_AtCmdResp.h"
#include "FrameHandlers/FH_RxPacket802.h"
#include "FrameHandlers/FH_IoDataSample802.h"
#include "RemoteXBee/RemoteXBee.h"

namespace XBeeLib {

/** Class for XBee ZigBee modules, derived from XBee */
class XBee802 : public XBee
{
    public:

        /**
         * IoLine for XBee802 Modules
         */
        enum IoLine {
            DIO0_AD0 = 0, /**< DIO0_AD0 pin */
            DIO1_AD1 = 1, /**< DIO1_AD1 pin */
            DIO2_AD2 = 2, /**< DIO2_AD2 pin */
            DIO3_AD3 = 3, /**< DIO3_AD3 pin */
            DIO4_AD4 = 4, /**< DIO4_AD4 pin */
            DIO5_AD5 = 5, /**< DIO5_AD5 pin */
            DIO6     = 6, /**< DIO6 pin */
            DIO7     = 7, /**< DIO7 pin */
            DI8      = 8, /**< DI8 pin */
            PWM0,         /**< PWM0 pin */
            PWM1           /**< PWM1 pin */
        };
  
        /** Class constructor
         * @param tx the TX pin of the UART that will interface the XBee module
         * @param rx the RX pin of the UART that will interface the XBee module
         * @param reset the pin to which the XBee's reset line is attached to, use NC if not available
         * @param rts the RTS pin for the UART that will interface the XBee module, use NC if not available
         * @param cts the CTS pin for the UART that will interface the XBee module, use NC if not available
         * @param baud the baudrate for the UART that will interface the XBee module. Note that the module has to be already configured
         * to this baud rate (ATBD parameter). By default it is configured to 9600 bps
         */
        XBee802(PinName tx, PinName rx, PinName reset = NC, PinName rts = NC, PinName cts = NC, int baud = 9600);
 
        /** Class destructor */
        virtual ~XBee802();
        
        /** init -  initializes object
         * This function must be called just after creating the object so it initializes internal data.
         * @returns
         *         Success if the module has been properly initialized and is ready to process data.
         *         Failure otherwise.
         */
        RadioStatus init();

        /** set_panid - sets the 16 bit PAN ID.        
         *
         *  @param panid the PAN ID value that will be set on the radio
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_panid(uint16_t panid);
        
        /** get_panid - gets the configured 16 bit PAN ID
         *
         *  @param panid pointer where the read PAN ID value will be stored
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus get_panid(uint16_t * const panid);
        
        /** set_channel - sets the network channel number
         *
         *  @param channel the channel in which the radio operates. Range is 0x0B - 0x1A for XBee and 0x0C - 0x17 for XBee-PRO.
         *  The Center Frequency = 2.405 + (CH - 11) * 5 MHz
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_channel(uint8_t channel);

        /** get_panid - gets the network channel number
         *
         *  @param channel pointer where the channel value will be stored.
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus get_channel(uint8_t * const channel);

        /** set_network_address - sets the 16 bit network address of the device
         *
         *  @param addr the device 16bit network address (0x0 - 0xFFFF)
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_network_address(uint16_t addr);

        /** register_node_discovery_cb - registers the callback function that will be called
         * when the responses to the node discovery command arrive
         *
         *  @param function function pointer with the callback function
         */
        void register_node_discovery_cb(node_discovery_802_cb_t function);

        /** unregister_node_discovery_cb - removes the node discovery callback */
        void unregister_node_discovery_cb();

        /** register_receive_cb - registers the callback function that will be called
         * when a rx packet is received
         *
         *  @param function function pointer with the callback function
         */
        void register_receive_cb(receive_802_cb_t function);

        /** unregister_receive_cb - removes the rx packet callback */
        void unregister_receive_cb();
        
        /** register_io_sample_cb - registers the callback function that will be called
         * when a IO Sample Data packet is received
         *
         *  @param function function pointer with the callback function
         */
        void register_io_sample_cb(io_data_cb_802_t function);

        /** unregister_io_sample_cb - removes the IO Sample Data reception callback */
        void unregister_io_sample_cb();

        /*********************** send_data member methods ************************/
        /** send_data - sends data to a remote device
         *
         *  @param remote remote device
         *  @param data pointer to the data that will be sent
         *  @param len number of bytes that will be transmitted
         *  @param syncr if true, method waits for the packet answer with the result of the operation
         *  @returns the result of the data transfer
         *     TxStatusSuccess if the operation was successful,
         *     the error code otherwise
         */
        virtual TxStatus send_data(const RemoteXBee& remote, const uint8_t *const data, uint16_t len, bool syncr = true);

        /** get_remote_node_by_id - searches for a device in the network with the specified Node Identifier.
         *
         *  @param node_id node id of the device we are looking for
         *  @returns a RemoteXBee802 with the 16-bit and 64-bit address of the remote device whose node id matches with the parameter.
         *  If node is not found, the returned object will have invalid addresses (RemoteXBee802::is_valid() will return false).
         */
        RemoteXBee802 get_remote_node_by_id(const char * const node_id);

        /* Allow using XBee::set_param() methods for local radio from this class */
        using XBee::set_param;

        /** set_param - sets a parameter in a remote radio by sending an AT command and waiting for the response.
         *
         *  @param remote remote device
         *  @param param parameter to be set.
         *  @param data the parameter value (4 bytes) to be set.
         *  @returns the command response status.
         */
        virtual AtCmdFrame::AtCmdResp set_param(const RemoteXBee& remote, const char * const param, uint32_t data);
        
        /** set_param - sets a parameter in a remote radio by sending an AT command and waiting for the response.
         *
         *  @param remote remote device
         *  @param param parameter to be set.
         *  @param the parameter value byte array (len bytes) to be set. 
         *  @param len number of bytes of the parameter value.
         *  @returns the command response status.
         */
        virtual AtCmdFrame::AtCmdResp set_param(const RemoteXBee& remote, const char * const param, const uint8_t * data = NULL, uint16_t len = 0);

        /* Allow using XBee::get_param() methods for local radio from this class */
        using XBee::get_param;
        
        /** get_param - gets a parameter from a remote radio by sending an AT command and waiting for the response.
         *
         *  @param remote remote device
         *  @param param parameter to be get.
         *  @param data pointer where the param value (4 bytes) will be stored. 
         *  @returns the command response status.
         */
        virtual AtCmdFrame::AtCmdResp get_param(const RemoteXBee& remote, const char * const param, uint32_t * const data);
      
        /** get_param - gets a parameter from a remote radio by sending an AT command and waiting for the response.
         *
         *  @param remote remote device
         *  @param param parameter to be get.
         *  @param data pointer where the param value (n bytes) will be stored. 
         *  @param len pointer where the number of bytes of the param value will be stored. 
         *  @returns the command response status.
         */
        virtual AtCmdFrame::AtCmdResp get_param(const RemoteXBee& remote, const char * const param, uint8_t * const data, uint16_t * const len);

        /************************* IO member methods **************************/
        /** set_pin_config - configures a radio IO line
         *
         *  @param remote remote device
         *  @param line IO line being configured
         *  @param mode configuration mode for the selected line
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_pin_config(const RemoteXBee& remote, IoLine line, IoMode mode);

        /** get_pin_config - gets the configuration of a radio IO line
         *
         *  @param remote remote device
         *  @param line IO line being read to get its configuration
         *  @param mode pointer where the configuration will be stored
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus get_pin_config(const RemoteXBee& remote, IoLine line, IoMode * const mode);

        /** set_dio - sets to low/high a DIO line
         *
         *  @param remote remote device
         *  @param line DIO line being set
         *  @param val value that will be set in the DIO line
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_dio(const RemoteXBee& remote, IoLine line, DioVal val);

        /** get_dio - read the value of a DIO configured as digital input
         *
         *  @param remote remote device
         *  @param line DIO line being read
         *  @param val pointer where the DIO value read will be stored
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus get_dio(const RemoteXBee& remote, IoLine line, DioVal * const val);

        /** get_adc - read the value of the espcified ADC line
         *
         *  @param remote remote device
         *  @param line ADC line being read
         *  @param val pointer where the value read from the ADC will be stored
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus get_adc(const RemoteXBee& remote, IoLine line, uint16_t * const val);

        /** get_iosample - retrieves an @ref IOSample802 from a remote node. This object can be used to get the remote node's ADC and DIO values.
         *
         *  @param remote remote device
         *  @returns IOSample802 object with the remote node's DIO and ADC values.
         */
        IOSample802 get_iosample(const RemoteXBee& remote);

        /** set_pwm - sets the duty cycle of a PWM line
         *
         *  @param remote remote device
         *  @param line PWM line being set
         *  @param duty_cycle duty cycle that will be set in the PWM line
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_pwm(const RemoteXBee& remote, IoLine line, float duty_cycle);

        /** set_pin_pull_up - enables or disables the internal pull-up resistor of a line
         *
         *  @param remote remote device
         *  @param line line being configured for pull-up
         *  @param enable whether to enable the internal pull-up resistor.
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus set_pin_pull_up(const RemoteXBee& remote, IoLine line, bool enable);

        /** enable_dio_change_detection - enables or disables the notification when a change is detected in a digital input line.
         * In other words, it will force an IO Sample transmission when the DIO state changes. Only for DIO0 to DIO7.
         *
         *  @param remote remote device
         *  @param line line being configured for pull-up
         *  @param enable whether to enable the internal pull-up resistor.
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus enable_dio_change_detection(const RemoteXBee& remote, IoLine line, bool enable);

/* TODO: With current firmware ATM0 fails: Returns just OK and sets pwm to 0 */
#ifdef GET_PWM_AVAILABLE
        /** get_pwm - gets the duty cycle of a PWM line
         *
         *  @param remote remote device
         *  @param line PWM line being read
         *  @param duty_cycle pointer where the value of the duty cycle read from
         *                    the PWM line will be stored
         *  @returns
         *     Success if the operation was successful,
         *     Failure otherwise
         */
        RadioStatus get_pwm(const RemoteXBee& remote, IoLine line, float * const duty_cycle);
#endif

    protected:
        inline bool is_PRO()
        {
            return (_hw_version & 0xFF00U) == 0x1800U;
        }

        /** Synchronization lost counter, automatically updated by the library */
        volatile uint16_t    _sync_lost_cnt;

        /** Frame handler used for the node discovery. Registered when a callback function
         * is registered */
        FH_NodeDiscovery802  *_nd_handler;
        
         /** Frame handler used for the rx 64 bit packets. Automatically registered when a callback
         *  function is registered */         
        FH_RxPacket64b802  *_rx_64b_handler;
        
         /** Frame handler used for the rx 16 bit packets. Automatically registered when a callback
         *  function is registered */
        FH_RxPacket16b802  *_rx_16b_handler;

        /** Frame handler used for the 64 bit IO Data Samples packets. Automatically registered when a callback
        *  function is registered */
        FH_IoDataSampe64b802  *_io_data_64b_handler;

        /** Frame handler used for the 16 bit IO Data Samples packets. Automatically registered when a callback
        *  function is registered */
        FH_IoDataSampe16b802  *_io_data_16b_handler;

        /** Method called directly by the library when a modem status frame is received to 
         * update the internal status variables */
        virtual void radio_status_update(AtCmdFrame::ModemStatus modem_status);

        /* Allow using XBee::send_data() methods from this class */
        using XBee::send_data;
    
    private:

};

}   /* namespace XBeeLib */

#endif /* __XBEE_802_H_ */