/*
 * Copyright (C) 2017 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
 *
 */

#include <stdint.h>
#include <stdio.h>
#include "btstack_memory.h"
#include "ble/gatt-service/mesh_provisioning_service_server.h"
#include "hci_dump.h"
#include "hci_dump_posix_fs.h"
#include "mesh/mesh_node.h"
#include "mesh/pb_adv.h"
#include "mesh/pb_gatt.h"
#include "mesh/provisioning.h"
#include "mesh/provisioning_device.h"

#include "CppUTest/TestHarness.h"
#include "CppUTest/CommandLineTestRunner.h"

#include "mock.h"

static void CHECK_EQUAL_ARRAY(const char * name, uint8_t * expected, uint8_t * actual, int size){
    int i;
    for (i=0; i<size; i++){
        if (expected[i] != actual[i]) {
            printf("%s: offset %u wrong\n", name, i);
            printf("expected: "); printf_hexdump(expected, size);
            printf("actual:   "); printf_hexdump(actual, size);
        }
        BYTES_EQUAL(expected[i], actual[i]);
    }
}

const static uint8_t device_uuid[] = { 0x00, 0x1B, 0xDC, 0x08, 0x10, 0x21, 0x0B, 0x0E, 0x0A, 0x0C, 0x00, 0x0B, 0x0E, 0x0A, 0x0C, 0x00 };

// pb-adv mock for testing

static btstack_packet_handler_t pb_adv_packet_handler;

static uint8_t * pdu_data;
static uint16_t  pdu_size;

/**
 * Initialize Provisioning Bearer using Advertisement Bearer
 * @param DeviceUUID
 */
void pb_adv_init(void){}
void pb_gatt_init(void){}

/**
 * Close Link
 * @param con_handle
 * @param reason 0 = success, 1 = timeout, 2 = fail
 */
void pb_gatt_close_link(hci_con_handle_t con_handle, uint8_t reason){
    UNUSED(con_handle);
    UNUSED(reason);
}
void pb_adv_close_link(hci_con_handle_t con_handle, uint8_t reason){
    UNUSED(con_handle);
    UNUSED(reason);
}


/**
 * Register listener for Provisioning PDUs and MESH_PBV_ADV_SEND_COMPLETE
 */
void pb_adv_register_device_packet_handler(btstack_packet_handler_t packet_handler){
    pb_adv_packet_handler = packet_handler;
}

void pb_gatt_register_packet_handler(btstack_packet_handler_t packet_handler){
    UNUSED(packet_handler);
}
/** 
 * Send Provisioning PDU
 */
void pb_adv_send_pdu(uint16_t pb_transport_cid, const uint8_t * pdu, uint16_t size){
    UNUSED(pb_transport_cid);
    pdu_data = (uint8_t*) pdu;
    pdu_size = size;
    // dump_data((uint8_t*)pdu,size);
    // printf_hexdump(pdu, size);
}
void pb_gatt_send_pdu(uint16_t con_handle, const uint8_t * pdu, uint16_t _pdu_size){
    UNUSED(con_handle);
    UNUSED(pdu);
    UNUSED(_pdu_size);
}
 
uint16_t mesh_network_key_get_free_index(void){
    return 0;
}

static mesh_network_key_t network_key; 
extern "C" mesh_network_key_t * btstack_memory_mesh_network_key_get(void){
    return &network_key;
}

static void perform_crypto_operations(void){
    int more = 1;
    while (more){
        more = mock_process_hci_cmd();
    }
}

static void send_prov_pdu(const uint8_t * packet, uint16_t size){
    pb_adv_packet_handler(PROVISIONING_DATA_PACKET, 0, (uint8_t*) packet, size);
    perform_crypto_operations();
}

static void pb_adv_emit_pdu_sent(uint8_t status){
    uint8_t event[] = { HCI_EVENT_MESH_META, 2, MESH_SUBEVENT_PB_TRANSPORT_PDU_SENT, status};
    pb_adv_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event));
}

static int scan_hex_byte(const char * byte_string){
    int upper_nibble = nibble_for_char(*byte_string++);
    if (upper_nibble < 0) return -1;
    int lower_nibble = nibble_for_char(*byte_string);
    if (lower_nibble < 0) return -1;
    return (upper_nibble << 4) | lower_nibble;
}

static int btstack_parse_hex(const char * string, uint16_t len, uint8_t * buffer){
    int i;
    for (i = 0; i < len; i++) {
        int single_byte = scan_hex_byte(string);
        if (single_byte < 0) return 0;
        string += 2;
        buffer[i] = (uint8_t)single_byte;
        // don't check seperator after last byte
        if (i == len - 1) {
            return 1;
        }
        // optional seperator
        char separator = *string;
        if (separator == ':' && separator == '-' && separator == ' ') {
            string++;
        }
    }
    return 1;
}

// void pb_gatt_close_link(hci_con_handle_t con_handle, uint8_t reason){
// }

static uint8_t      prov_static_oob_data[16];
static const char * prov_static_oob_string = "00000000000000000102030405060708";

TEST_GROUP(Provisioning){
    void setup(void){
        mock_init();
        for (unsigned int i = 0 ; i < 4 ; i ++){
            printf("rand: %08x\n", rand());
        }
        btstack_crypto_init();
        provisioning_device_init();
        mesh_node_set_device_uuid(device_uuid);
        btstack_parse_hex(prov_static_oob_string, 16, prov_static_oob_data);
        provisioning_device_set_static_oob(16, prov_static_oob_data);
        provisioning_device_set_output_oob_actions(0x08, 0x08);
        provisioning_device_set_input_oob_actions(0x08, 0x08);
        perform_crypto_operations();
    }
};

uint8_t prov_invite[] = { 0x00, 0x00 };
uint8_t prov_capabilities[] = { 0x01, 0x01, 0x00, 0x01, 0x00, 0x01, 0x08, 0x00, 0x08, 0x08, 0x00, 0x08, };
uint8_t prov_start[] = { 0x02, 0x00, 0x00, 0x02, 0x00, 0x01 };
uint8_t prov_public_key[] = { 0x03,
                              0x8E, 0x9D, 0xEE, 0x76, 0x17, 0x67, 0x4A, 0xCD, 0xBE, 0xA5, 0x4D, 0xCD, 0xAB, 0x7E, 0xA3, 0x83,
                              0x26, 0xF6, 0x87, 0x22, 0x7F, 0x97, 0xE7, 0xC4, 0xEE, 0xF5, 0x2F, 0x7C, 0x80, 0x5A, 0xEB, 0x2A,
                              0x59, 0x46, 0x99, 0xDF, 0x60, 0x54, 0x53, 0x47, 0x48, 0xF8, 0xA1, 0x99, 0xF0, 0x02, 0xE7, 0x23,
                              0x2C, 0x52, 0x9C, 0xBA, 0x0F, 0x54, 0x94, 0x1F, 0xE4, 0xB7, 0x02, 0x89, 0x9E, 0x03, 0xFA, 0x43 };
uint8_t prov_confirm[] = { 0x05,
                           0x5F, 0xDE, 0x98, 0x35, 0x7F, 0x0B, 0xA2, 0xB2, 0x94, 0x72, 0x03, 0xD6, 0x82, 0x57, 0xF0, 0x6E };
uint8_t prov_random[]  = { 0x06, 0xC2, 0xE1, 0xF1, 0xF9, 0x7D, 0x3F, 0x9E, 0xCF, 0xE6, 0x73, 0xB8, 0x5C, 0x2E, 0x97, 0x4A, 0x25, };
uint8_t prov_data[] = {
    0x07,
    0x85, 0x66, 0xac, 0x46, 0x37, 0x34, 0x86, 0xe1, 0x3e, 0x4c, 0x13, 0x52, 0xd0, 0x6d, 0x34, 0x7d,
    0xce, 0xf1, 0xd1, 0x7d, 0xbd, 0xbe, 0xcc, 0x99, 0xc3, 
    0x93, 0x87, 0xfc, 0xb0, 0x72, 0x0f, 0xd8, 0x8d };
uint8_t prov_complete[] = { 0x08, };

TEST(Provisioning, Prov1){
    // send prov inviate
    send_prov_pdu(prov_invite, sizeof(prov_invite));        
    // check for prov cap
    CHECK_EQUAL_ARRAY("prov_capabilities", prov_capabilities, pdu_data, sizeof(prov_capabilities));
    pb_adv_emit_pdu_sent(0);
    // send prov start
    send_prov_pdu(prov_start, sizeof(prov_start));        
    // send public key
    send_prov_pdu(prov_public_key, sizeof(prov_public_key));
    // check for public key
    CHECK_EQUAL_ARRAY("prov_public_key", prov_public_key, pdu_data, sizeof(prov_public_key));
    pb_adv_emit_pdu_sent(0);
    // send prov confirm
    send_prov_pdu(prov_confirm, sizeof(prov_confirm));
    // check for prov confirm
    CHECK_EQUAL_ARRAY("prov_confirm", prov_confirm, pdu_data, sizeof(prov_confirm));
    pb_adv_emit_pdu_sent(0);
    // send prov random
    send_prov_pdu(prov_random, sizeof(prov_random));
    // check for prov random
    CHECK_EQUAL_ARRAY("prov_random", prov_random, pdu_data, sizeof(prov_random));
    pb_adv_emit_pdu_sent(0);
    // send prov data
    send_prov_pdu(prov_data, sizeof(prov_data));
    // check prov complete
    CHECK_EQUAL_ARRAY("prov_complete", prov_complete, pdu_data, sizeof(prov_complete));
    pb_adv_emit_pdu_sent(0);
}

int main (int argc, const char * argv[]){
    // log into file using HCI_DUMP_PACKETLOGGER format
    const char * log_path = "hci_dump.pklg";
    hci_dump_posix_fs_open(log_path, HCI_DUMP_PACKETLOGGER);
    hci_dump_init(hci_dump_posix_fs_get_instance());
    printf("Packet Log: %s\n", log_path);

    return CommandLineTestRunner::RunAllTests(argc, argv);
}