/*
 * Copyright (c) 2016 Nordic Semiconductor ASA
 * Copyright (c) 2015-2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <errno.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>

// Nordic NDK
#if defined(CONFIG_HAS_NORDIC_DRIVERS)
#include "nrf.h"
#include <nrfx_clock.h>
#endif

// BTstack
#include "btstack_debug.h"
#include "btstack_event.h"
#include "btstack_memory.h"
#include "hci.h"
#include "hci_dump.h"
#ifdef ENABLE_HCI_DUMP
#ifdef ENABLE_SEGGER_RTT_BINARY
#include "hci_dump_segger_rtt_binary.h"
#else
#include "hci_dump_embedded_stdout.h"
#endif
#endif
#include "hci_transport.h"

#include "bluetooth_company_id.h"
#include "btstack_chipset_zephyr.h"

#include "btstack_tlv.h"
#include "btstack_tlv_none.h"
#include "ble/le_device_db_tlv.h"

#include "hci_transport_zephyr.h"
#include "btstack_run_loop_zephyr.h"

static btstack_packet_callback_registration_t hci_event_callback_registration;

static bd_addr_t local_addr = { 0 };

void nrf_get_static_random_addr( bd_addr_t addr ) {
    // nRF5 chipsets don't have an official public address
    // Instead, a Static Random Address is assigned during manufacturing
    // let's use it as well
#if defined(CONFIG_SOC_SERIES_NRF51X) || defined(CONFIG_SOC_SERIES_NRF52X)
    big_endian_store_16(addr, 0, NRF_FICR->DEVICEADDR[1] | 0xc000);
    big_endian_store_32(addr, 2, NRF_FICR->DEVICEADDR[0]);
#elif defined(CONFIG_SOC_SERIES_NRF53X)
    big_endian_store_16(addr, 0, NRF_FICR->INFO.DEVICEID[1] | 0xc000 );
    big_endian_store_32(addr, 2, NRF_FICR->INFO.DEVICEID[0]);
#endif
}

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    %#04x\n", hci_version);
    printf("- HCI Revision   %#04x\n", hci_revision);
    printf("- LMP Version    %#04x\n", lmp_version);
    printf("- LMP Subversion %#04x\n", lmp_subversion);
    printf("- Manufacturer   %#04x\n", manufacturer);
    switch (manufacturer){
        case BLUETOOTH_COMPANY_ID_NORDIC_SEMICONDUCTOR_ASA:
        case BLUETOOTH_COMPANY_ID_THE_LINUX_FOUNDATION:
            printf("Nordic Semiconductor nRF5 chipset.\n");
            hci_set_chipset(btstack_chipset_zephyr_instance());
            break;
        case BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC:
            printf("PacketCraft HCI Controller\n");
            nrf_get_static_random_addr( local_addr );
            gap_random_address_set( local_addr );
            break;
        default:
            printf("Unknown manufacturer.\n");
            nrf_get_static_random_addr( local_addr );
            gap_random_address_set( local_addr );
            break;
    }
}

static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
    const uint8_t *params;
    if (packet_type != HCI_EVENT_PACKET) return;
    switch (hci_event_packet_get_type(packet)){
        case BTSTACK_EVENT_STATE:
            switch(btstack_event_state_get_state(packet)){
                case HCI_STATE_WORKING:
                    printf("BTstack up and running on %s.\n", bd_addr_to_str(local_addr));
                    break;
                case HCI_STATE_OFF:
                    log_info("Good bye, see you.\n");
                    break;
                default:
                    break;
            }
            break;
        case HCI_EVENT_COMMAND_COMPLETE:
            switch (hci_event_command_complete_get_command_opcode(packet)){
                case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION:
                    local_version_information_handler(packet);
                    break;
                case HCI_OPCODE_HCI_READ_BD_ADDR:
                    params = hci_event_command_complete_get_return_parameters(packet);
                    if(params[0] != 0)
                        break;
                    if(size < 12)
                        break;
                    reverse_48(&params[1], local_addr);
                    break;
                case HCI_OPCODE_HCI_ZEPHYR_READ_STATIC_ADDRESS:
                    params = hci_event_command_complete_get_return_parameters(packet);
                    if(params[0] != 0)
                        break;
                    if(size < 13)
                        break;
                    reverse_48(&params[2], local_addr);
                    gap_random_address_set(local_addr);
                    break;
                default:
                    break;
            }
            break;
        default:
            break;
    }
}

int btstack_main(void);

#if defined(CONFIG_BT_CTLR_ASSERT_HANDLER)
void bt_ctlr_assert_handle(char *file, uint32_t line)
{
    printf("CONFIG_BT_CTLR_ASSERT_HANDLER: file %s, line %u\n", file, line);
    while (1) {
    }
}
#endif /* CONFIG_BT_CTLR_ASSERT_HANDLER */

int main(void)
{
#if defined(CONFIG_SOC_SERIES_NRF53X)
    // switch the nrf5340_cpuapp to 128MHz
    nrfx_clock_divider_set(NRF_CLOCK_DOMAIN_HFCLK, NRF_CLOCK_HFCLK_DIV_1);
#endif

    printf("BTstack booting up..\n");

    // start with BTstack init - especially configure HCI Transport
    btstack_memory_init();
    btstack_run_loop_init(btstack_run_loop_zephyr_get_instance());

#ifdef ENABLE_HCI_DUMP
    // enable full log output while porting
#ifdef ENABLE_SEGGER_RTT_BINARY
    hci_dump_segger_rtt_binary_open( HCI_DUMP_PACKETLOGGER );
    hci_dump_init(hci_dump_segger_rtt_binary_get_instance());
#else
     hci_dump_init(hci_dump_embedded_stdout_get_instance());
#endif
#endif

    const btstack_tlv_t * btstack_tlv_impl = btstack_tlv_none_init_instance();
    // setup global tlv
    btstack_tlv_set_instance(btstack_tlv_impl, NULL);

    // setup LE Device DB using TLV
    le_device_db_tlv_configure(btstack_tlv_impl, NULL);

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

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

    // hand over to btstack embedded code 
    btstack_main();

    // go
    btstack_run_loop_execute();

    while (1){};
    return 0;
}