/*
 * 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
 *
 */

#define __BTSTACK_FILE__ "main.c"

// *****************************************************************************
//
// minimal setup for HCI code
//
// *****************************************************************************

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

#include "btstack_config.h"

#include "bluetooth_company_id.h"
#include "btstack_debug.h"
#include "btstack_event.h"
#include "btstack_link_key_db_fs.h"
#include "btstack_memory.h"
#include "btstack_run_loop.h"
#include "btstack_run_loop_posix.h"
#include "hal_led.h"
#include "hci.h"
#include "hci_dump.h"
#include "btstack_stdin.h"
#include "btstack_audio.h"
#include "btstack_tlv_posix.h"
#include "btstack_chipset_zephyr.h"

#define TLV_DB_PATH_PREFIX "/tmp/btstack_"
#define TLV_DB_PATH_POSTFIX ".tlv"
static char tlv_db_path[100];
static const btstack_tlv_t * tlv_impl;
static btstack_tlv_posix_t   tlv_context;
static bd_addr_t             local_addr;

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

static const uint8_t read_static_address_command_complete_prefix[] = { 0x0e, 0x1b, 0x01, 0x09, 0xfc };

static bd_addr_t static_address;
static int using_static_address;

static btstack_packet_callback_registration_t hci_event_callback_registration;

static void local_version_information_handler(uint8_t * packet){
    printf("Local version information:\n");
    uint16_t hci_version    = packet[6];
    uint16_t hci_revision   = little_endian_read_16(packet, 7);
    uint16_t lmp_version    = packet[9];
    uint16_t manufacturer   = little_endian_read_16(packet, 10);
    uint16_t lmp_subversion = little_endian_read_16(packet, 12);
    printf("- HCI Version    0x%04x\n", hci_version);
    printf("- HCI Revision   0x%04x\n", hci_revision);
    printf("- LMP Version    0x%04x\n", lmp_version);
    printf("- LMP Subversion 0x%04x\n", lmp_subversion);
    printf("- Manufacturer 0x%04x\n", manufacturer);
    switch (manufacturer){
        case BLUETOOTH_COMPANY_ID_THE_LINUX_FOUNDATION:
            printf("Linux Foundation - assume Zephyr hci_usb example running on nRF52xx\n");
            hci_set_chipset(btstack_chipset_zephyr_instance());
            break;
        default:
            break;
    }
}

static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
    UNUSED(channel);
    UNUSED(size);
    if (packet_type != HCI_EVENT_PACKET) return;
    switch (hci_event_packet_get_type(packet)){
        case BTSTACK_EVENT_STATE:
            if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return;
            gap_local_bd_addr(local_addr);
            if (using_static_address){
                memcpy(local_addr, static_address, 6);
            }
            printf("BTstack up and running on %s.\n", bd_addr_to_str(local_addr));
            strcpy(tlv_db_path, TLV_DB_PATH_PREFIX);
            strcat(tlv_db_path, bd_addr_to_str(local_addr));
            strcat(tlv_db_path, TLV_DB_PATH_POSTFIX);
            tlv_impl = btstack_tlv_posix_init_instance(&tlv_context, tlv_db_path);
            btstack_tlv_set_instance(tlv_impl, &tlv_context);
            break;
        case HCI_EVENT_COMMAND_COMPLETE:
            if (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_read_local_version_information)){
                local_version_information_handler(packet);
            }
            if (memcmp(packet, read_static_address_command_complete_prefix, sizeof(read_static_address_command_complete_prefix)) == 0){
                reverse_48(&packet[7], static_address);
                gap_random_address_set(static_address);
                using_static_address = 1;
            }
            break;
        default:
            break;
    }
}

static void sigint_handler(int param){
    UNUSED(param);

    printf("CTRL-C - SIGINT received, shutting down..\n");   
    log_info("sigint_handler: shutting down");

    // reset anyway
    btstack_stdin_reset();

    // power down
    hci_power_control(HCI_POWER_OFF);
    hci_close();
    log_info("Good bye, see you.\n");    
    exit(0);
}

static int led_state = 0;
void hal_led_toggle(void){
    led_state = 1 - led_state;
    printf("LED State %u\n", led_state);
}

#define USB_MAX_PATH_LEN 7
int main(int argc, const char * argv[]){

    uint8_t usb_path[USB_MAX_PATH_LEN];
    int usb_path_len = 0;
    const char * usb_path_string = NULL;
    if (argc >= 3 && strcmp(argv[1], "-u") == 0){
        // parse command line options for "-u 11:22:33"
        usb_path_string = argv[2];
        printf("Specified USB Path: ");
        while (1){
            char * delimiter;
            int port = strtol(usb_path_string, &delimiter, 16);
            usb_path[usb_path_len] = port;
            usb_path_len++;
            printf("%02x ", port);
            if (!delimiter) break;
            if (*delimiter != ':' && *delimiter != '-') break;
            usb_path_string = delimiter+1;
        }
        printf("\n");
        argc -= 2;
        memmove(&argv[1], &argv[3], (argc-1) * sizeof(char *));
    }

	/// GET STARTED with BTstack ///
	btstack_memory_init();
    btstack_run_loop_init(btstack_run_loop_posix_get_instance());
	    
    if (usb_path_len){
        hci_transport_usb_set_path(usb_path_len, usb_path);
    }

    // use logger: format HCI_DUMP_PACKETLOGGER, HCI_DUMP_BLUEZ or HCI_DUMP_STDOUT

    char pklg_path[100];
    strcpy(pklg_path, "/tmp/hci_dump");
    if (usb_path_len){
        strcat(pklg_path, "_");
        strcat(pklg_path, usb_path_string);
    }
    strcat(pklg_path, ".pklg");
    printf("Packet Log: %s\n", pklg_path);
    hci_dump_open(pklg_path, HCI_DUMP_PACKETLOGGER);

    // init HCI
	hci_init(hci_transport_usb_instance(), NULL);

#ifdef ENABLE_CLASSIC
    hci_set_link_key_db(btstack_link_key_db_fs_instance());
#endif    

#ifdef HAVE_PORTAUDIO
    btstack_audio_sink_set_instance(btstack_audio_portaudio_sink_get_instance());
    btstack_audio_source_set_instance(btstack_audio_portaudio_source_get_instance());
#endif

    // inform about BTstack state
    hci_event_callback_registration.callback = &packet_handler;
    hci_add_event_handler(&hci_event_callback_registration);

    // handle CTRL-c
    signal(SIGINT, sigint_handler);

    // setup app
    btstack_main(argc, argv);

    // go
    btstack_run_loop_execute();    

    return 0;
}
