/*
 * Copyright (C) 2010 by Matthias Ringwald
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY MATTHIAS RINGWALD 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.
 *
 */

/*
 *  rfcomm-echo.c
 */

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <btstack/btstack.h>
#include <btstack/sdp_util.h>

// until next BTstack Cydia update
#include "compat-svn.c"

// input from command line arguments
bd_addr_t addr = { };
uint16_t con_handle;
uint16_t mtu;
char pin[17];
int counter = 0;
uint16_t rfcomm_channel_nr;
uint16_t rfcomm_channel_id;

uint8_t test_data[1021];
void create_test_data(void){
    int x,y;
    for (y=0;y<25;y++){
        for (x=0;x<78;x++){
            test_data[y*80+x] = '0' + (x % 10);
        }
        test_data[y*80+78] = '\n';
        test_data[y*80+79] = '\r';
    }
}

uint8_t service_buffer[100];
void create_spp_service(uint8_t *service, int service_id){
	
	uint8_t* attribute;
	de_create_sequence(service);
	
	// 0x0001 "Service Class ID List"
	de_add_number(service,  DE_UINT, DE_SIZE_16, 0x0001);
	attribute = de_push_sequence(service);
	{
		de_add_number(attribute,  DE_UUID, DE_SIZE_16, 0x1101 );
	}
	de_pop_sequence(service, attribute);
	
	// 0x0004 "Protocol Descriptor List"
	de_add_number(service,  DE_UINT, DE_SIZE_16, 0x0004);
	attribute = de_push_sequence(service);
	{
		uint8_t* l2cpProtocol = de_push_sequence(attribute);
		{
			de_add_number(l2cpProtocol,  DE_UUID, DE_SIZE_16, 0x0100);
		}
		de_pop_sequence(attribute, l2cpProtocol);
		
		uint8_t* rfcomm = de_push_sequence(attribute);
		{
			de_add_number(rfcomm,  DE_UUID, DE_SIZE_16, 0x0003);  // rfcomm_service
			de_add_number(rfcomm,  DE_UINT, DE_SIZE_8,  service_id);  // rfcomm channel
		}
		de_pop_sequence(attribute, rfcomm);
	}
	de_pop_sequence(service, attribute);
	
	// 0x0005 "Public Browse Group"
	de_add_number(service,  DE_UINT, DE_SIZE_16, 0x0005); // public browse group
	attribute = de_push_sequence(service);
	{
		de_add_number(attribute,  DE_UUID, DE_SIZE_16, 0x1002 );
	}
	de_pop_sequence(service, attribute);
	
	// 0x0006
	de_add_number(service,  DE_UINT, DE_SIZE_16, SDP_LanguageBaseAttributeIDList);
	attribute = de_push_sequence(service);
	{
		de_add_number(attribute, DE_UINT, DE_SIZE_16, 0x656e);
		de_add_number(attribute, DE_UINT, DE_SIZE_16, 0x006a);
		de_add_number(attribute, DE_UINT, DE_SIZE_16, 0x0100);
	}
	de_pop_sequence(service, attribute);
	
	// 0x0009 "Bluetooth Profile Descriptor List"
	de_add_number(service,  DE_UINT, DE_SIZE_16, 0x0009);
	attribute = de_push_sequence(service);
	{
		uint8_t *sppProfile = de_push_sequence(attribute);
		{
			de_add_number(sppProfile,  DE_UUID, DE_SIZE_16, 0x1101);
			de_add_number(sppProfile,  DE_UINT, DE_SIZE_16, 0x0100);
		}
		de_pop_sequence(attribute, sppProfile);
	}
	de_pop_sequence(service, attribute);
	
	// 0x0100 "ServiceName"
	de_add_number(service,  DE_UINT, DE_SIZE_16, 0x0100);
	de_add_data(service,  DE_STRING, 8, (uint8_t *) "SPP ECHO");
}

void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
	bd_addr_t event_addr;
	
	switch (packet_type) {
			
		case RFCOMM_DATA_PACKET:
			printf("Received RFCOMM data on channel id %u, size %u\n", channel, size);
			hexdump(packet, size);
            bt_send_rfcomm(channel, packet, size);
			break;
			
		case HCI_EVENT_PACKET:
			switch (packet[0]) {
					
				case BTSTACK_EVENT_POWERON_FAILED:
					// handle HCI init failure
					printf("HCI Init failed - make sure you have turned off Bluetooth in the System Settings\n");
					exit(1);
					break;		
                    
				case BTSTACK_EVENT_STATE:
					// bt stack activated, get started
                    if (packet[2] == HCI_STATE_WORKING) {
                        // get persistent RFCOMM channel
                        printf("HCI_STATE_WORKING\n");
                        bt_send_cmd(&rfcomm_persistent_channel_for_service, "ch.ringwald.btstack.rfcomm-echo2");
                  	}
					break;
                    
                case RFCOMM_EVENT_PERSISTENT_CHANNEL:
                    rfcomm_channel_nr = packet[3];
                    printf("RFCOMM channel %u was assigned by BTdaemon\n", rfcomm_channel_nr);
                    bt_send_cmd(&rfcomm_register_service, rfcomm_channel_nr, 100);  // reserved channel, mtu=100
                    break;
                    
                case RFCOMM_EVENT_SERVICE_REGISTERED:
                    printf("RFCOMM_EVENT_SERVICE_REGISTERED\n");
                    // register SDP for our SPP
                    create_spp_service(service_buffer, rfcomm_channel_nr);
                    bt_send_cmd(&sdp_register_service_record, service_buffer);
                    bt_send_cmd(&btstack_set_discoverable, 1);
                    break;
                
				case HCI_EVENT_PIN_CODE_REQUEST:
					// inform about pin code request
					printf("Using PIN 0000\n");
					bt_flip_addr(event_addr, &packet[2]); 
					bt_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", rfcomm_channel_nr, bd_addr_to_str(event_addr));
					bt_send_cmd(&rfcomm_accept_connection, rfcomm_channel_id);
					break;
					
				case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
					// data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16)
					if (packet[2]) {
						printf("RFCOMM channel open failed, status %u\n", packet[2]);
					} else {
						rfcomm_channel_id = READ_BT_16(packet, 12);
						mtu = READ_BT_16(packet, 14);
						printf("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u\n", rfcomm_channel_id, mtu);
					}
					break;
					
				case HCI_EVENT_DISCONNECTION_COMPLETE:
					// connection closed -> quit test app
					printf("Basebank connection closed\n");
					break;
					
				default:
					break;
			}
			break;
		default:
			break;
	}
}


int main (int argc, const char * argv[]){
	
    create_test_data();
    
	run_loop_init(RUN_LOOP_POSIX);
	int err = bt_open();
	if (err) {
		fprintf(stderr,"Failed to open connection to BTdaemon, err %d\n",err);
		return 1;
	}
	bt_register_packet_handler(packet_handler);
	
	bt_send_cmd(&btstack_set_power_mode, HCI_POWER_ON );
	run_loop_execute();
	bt_close();
    return 0;
}