// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

#include "mbed.h"
#include "azure_c_shared_utility/optimize_size.h"
#include "azure_c_shared_utility/tickcounter.h"

class TICK_COUNTER_INSTANCE_TAG
{
public:
    clock_t last_clock_value;
    tickcounter_ms_t current_ms;
};

TICK_COUNTER_HANDLE tickcounter_create(void)
{
    TICK_COUNTER_INSTANCE_TAG* result;
    result = new TICK_COUNTER_INSTANCE_TAG();
    result->last_clock_value = clock();
    result->current_ms = result->last_clock_value * 1000 / CLOCKS_PER_SEC;
    return result;
}

void tickcounter_destroy(TICK_COUNTER_HANDLE tick_counter)
{
    if (tick_counter != NULL)
    {
        delete tick_counter;
    }
}

int tickcounter_get_current_ms(TICK_COUNTER_HANDLE tick_counter, tickcounter_ms_t * current_ms)
{
    int result;
    if (tick_counter == NULL || current_ms == NULL)
    {
        result = MU_FAILURE;
    }
    else
    {
        TICK_COUNTER_INSTANCE_TAG* tick_counter_instance = (TICK_COUNTER_INSTANCE_TAG*)tick_counter;

        clock_t clock_value = clock();

        tick_counter_instance->current_ms += (clock_value - tick_counter_instance->last_clock_value) * 1000 / CLOCKS_PER_SEC;
        tick_counter_instance->last_clock_value = clock_value;
        *current_ms = tick_counter_instance->current_ms;

        result = 0;
    }
    return result;
}
