//*****************************************************************************
//
// 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 "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];

void hexdump2(void const *data, int size){
    int i;
    for (i=0; i<size;i++){
        printf("%02X ", ((uint8_t *)data)[i]);
    }
    printf("\n");
}


// 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:
					// bt stack activated, get started - set local name
					if (packet[2] == HCI_STATE_WORKING) {
                        hci_send_cmd(&hci_write_local_name, "BlueMSP-Demo");
					}
					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;
                    }
					if (COMMAND_COMPLETE_EVENT(packet, hci_write_local_name)){
						// start ANT init
						ant_send_cmd(&ant_reset); 
						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: ");
                	hexdump2(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);
        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);
} 

// main
int main(void)
{
    // stop watchdog timer
    WDTCTL = WDTPW + WDTHOLD;

    //Initialize clock and peripherals 
    halBoardInit();  
    halBoardStartXT1();	
    halBoardSetSystemClock(SYSCLK_16MHZ);
    
    // init debug UART
    halUsbInit();

    // init LEDs
    LED_PORT_OUT |= LED_1 | LED_2;
    LED_PORT_DIR |= LED_1 | LED_2;
    
	/// GET STARTED with BTstack ///
	btstack_memory_init();
    run_loop_init(RUN_LOOP_EMBEDDED);
	
    // init HCI
	hci_transport_t    * transport = hci_transport_h4_dma_instance();
	bt_control_t       * control   = bt_control_cc256x_instance();
    hci_uart_config_t  * config    = hci_uart_config_cc256x_instance();
    remote_device_db_t * remote_db = (remote_device_db_t *) &remote_device_db_memory;
	hci_init(transport, config, control, remote_db);
	
    // use eHCILL
    bt_control_cc256x_enable_ehcill(1);
    
    // 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);
    
	printf("Run...\n\r");

    // ready - enable irq used in h4 task
    __enable_interrupt();   

 	// turn on!
	hci_power_control(HCI_POWER_ON);

    // default to discoverable
    hci_discoverable_control(1);

    // go!
    run_loop_execute();	
    
    // happy compiler!
    return 0;
}