/*
 * Copyright (C) 2014 BlueKitchen GmbH
 *
 * 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 holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 4. Any redistribution, use, or modification is done solely for
 *    personal benefit and not for any commercial purpose or for
 *    monetary gain.
 *
 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH 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 MATTHIAS
 * RINGWALD 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.
 *
 * Please inquire about commercial licensing options at 
 * contact@bluekitchen-gmbh.com
 *
 */

// *****************************************************************************
//
// ant + spp demo - it provides a SPP port and and sends a counter every second
//                - it also listens on ANT channel 33,1,1
//
// it doesn't use the LCD to get down to a minimal memory footpring
//
// *****************************************************************************

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <msp430x54x.h>

#include "bt_control_cc256x.h"
#include "hal_board.h"
#include "hal_compat.h"
#include "hal_usb.h"

#include <btstack/ant_cmds.h>
#include <btstack/hci_cmds.h>
#include <btstack/run_loop.h>
#include <btstack/sdp_util.h>
#include <btstack/utils.h>

#include "hci.h"
#include "l2cap.h"
#include "btstack_memory.h"
#include "remote_device_db.h"
#include "rfcomm.h"
#include "sdp.h"
#include "btstack-config.h"

#define HEARTBEAT_PERIOD_MS 1000

static uint8_t   rfcomm_channel_nr = 1;
static uint16_t  rfcomm_channel_id = 0;
static uint8_t   spp_service_buffer[100];


// Bluetooth logic
static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
    bd_addr_t event_addr;
    uint8_t   rfcomm_channel_nr;
    uint16_t  mtu;
    
    uint8_t event_code;
	// uint8_t channel;
	uint8_t message_id;

	switch (packet_type) {
		case HCI_EVENT_PACKET:
			switch (packet[0]) {
					
				case BTSTACK_EVENT_STATE:
					if (packet[2] == HCI_STATE_WORKING) {
                        printf("BTstack is up and running\n");
                        // start ANT init
                        ant_send_cmd(&ant_reset); 
					}
					break;
				
				case HCI_EVENT_COMMAND_COMPLETE:
					if (COMMAND_COMPLETE_EVENT(packet, hci_read_bd_addr)){
                        bt_flip_addr(event_addr, &packet[6]);
                        printf("BD-ADDR: %s\n\r", bd_addr_to_str(event_addr));
                        break;
                    }
					break;

				case HCI_EVENT_LINK_KEY_REQUEST:
					// deny link key request
                    printf("Link key request\n\r");
                    bt_flip_addr(event_addr, &packet[2]);
					hci_send_cmd(&hci_link_key_request_negative_reply, &event_addr);
					break;
					
				case HCI_EVENT_PIN_CODE_REQUEST:
					// inform about pin code request
                    printf("Pin code request - using '0000'\n\r");
                    bt_flip_addr(event_addr, &packet[2]);
					hci_send_cmd(&hci_pin_code_request_reply, &event_addr, 4, "0000");
					break;
                
                case RFCOMM_EVENT_INCOMING_CONNECTION:
					// data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
					bt_flip_addr(event_addr, &packet[2]); 
					rfcomm_channel_nr = packet[8];
					rfcomm_channel_id = READ_BT_16(packet, 9);
					printf("RFCOMM channel %u requested for %s\n\r", rfcomm_channel_nr, bd_addr_to_str(event_addr));
                    rfcomm_accept_connection_internal(rfcomm_channel_id);
					break;
					
				case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
					// data: event(8), len(8), status (8), address (48), server channel(8), rfcomm_cid(16), max frame size(16)
					if (packet[2]) {
						printf("RFCOMM channel open failed, status %u\n\r", packet[2]);
					} else {
						rfcomm_channel_id = READ_BT_16(packet, 12);
						mtu = READ_BT_16(packet, 14);
						printf("\n\rRFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n\r", rfcomm_channel_id, mtu);
					}
					break;
                    
                case RFCOMM_EVENT_CHANNEL_CLOSED:
                    rfcomm_channel_id = 0;
                    break;
                

                case 0xff:	// vendor specific -> ANT
                	
                	// vendor specific ant message
                	if (packet[2] != 0x00) break;
                	if (packet[3] != 0x05) break;

					event_code = packet[7];

                	printf("ANT Event: ");
                	printf_hexdump(packet, size);

					switch(event_code){
						
						case MESG_STARTUP_MESG_ID:
							// 2. assign channel
							ant_send_cmd(&ant_assign_channel, 0, 0x00, 0);
							break;

						case MESG_RESPONSE_EVENT_ID:
							// channel    = packet[8];
							message_id = packet[9];
							switch (message_id){
								case MESG_ASSIGN_CHANNEL_ID:
									// 3. set channel ID
									ant_send_cmd(&ant_channel_id, 0, 33, 1, 1);
									break; 
								case MESG_CHANNEL_ID_ID:
									// 4. open channel
									ant_send_cmd(&ant_open_channel, 0);
							}
							break;

						default:
							break;
					}
                	break;

				default:
					break;
			} 
            break;
                        
        default:
            break;
	}
}

static void  heartbeat_handler(struct timer *ts){

    if (rfcomm_channel_id){
        static int counter = 0;
        char lineBuffer[30];
        sprintf(lineBuffer, "BTstack counter %04u\n\r", ++counter);
        printf(lineBuffer);
        if (rfcomm_can_send_packet_now(rfcomm_channel_id)){
            int err = rfcomm_send_internal(rfcomm_channel_id, (uint8_t*) lineBuffer, strlen(lineBuffer));
            if (err) {
                printf("rfcomm_send_internal -> error %d", err);
            }
        }   
    }
    
    run_loop_set_timer(ts, HEARTBEAT_PERIOD_MS);
    run_loop_add_timer(ts);
} 

int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){

    // init L2CAP
    l2cap_init();
    l2cap_register_packet_handler(packet_handler);
    
    // init RFCOMM
    rfcomm_init();
    rfcomm_register_packet_handler(packet_handler);
    rfcomm_register_service_internal(NULL, rfcomm_channel_nr, 100);  // reserved channel, mtu=100

    // init SDP, create record for SPP and register with SDP
    sdp_init();
	memset(spp_service_buffer, 0, sizeof(spp_service_buffer));
    service_record_item_t * service_record_item = (service_record_item_t *) spp_service_buffer;
    sdp_create_spp_service( (uint8_t*) &service_record_item->service_record, 1, "SPP Counter");
    printf("SDP service buffer size: %u\n\r", (uint16_t) (sizeof(service_record_item_t) + de_get_len((uint8_t*) &service_record_item->service_record)));
    sdp_register_service_internal(NULL, service_record_item);
    
    // set one-shot timer
    timer_source_t heartbeat;
    heartbeat.process = &heartbeat_handler;
    run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
    run_loop_add_timer(&heartbeat);
    
    // set local name
    gap_set_local_name("BlueMSP-Demo");
    // make discoverable
    hci_discoverable_control(1);

	printf("Run...\n\r");
 	// turn on!
	hci_power_control(HCI_POWER_ON);
    return 0;
}

