#include <stdint.h>
#include <stdio.h>

#include "watch_device_simulator.h"
#include "watch_i2c.h"
#include "watch_registers.h"

// leave resource_detector.h as last include!
#include "resource_detector.h"

uint8_t register_values[5];

static int watch_device_simulator_address_to_array_index(
            uint8_t address, uint8_t* register_value_index)
{
    if (register_value_index == NULL)
    {
        return -1;
    }

    if ((address < ADDRESS_CONFIG) || (address > ADDRESS_DATE_HIGH))
    {
        return -1;
    }

    *register_value_index = address - ADDRESS_CONFIG;

    return 0;
}

int watch_device_simulator_write_byte(uint8_t address, uint8_t value)
{
    uint8_t index = 0;
    if (watch_device_simulator_address_to_array_index(address, &index) != 0)
    {
        return -1;
    }

    register_values[index] = value;

    return 0;
}

int watch_device_simulator_read_byte(uint8_t address, uint8_t* value)
{
    uint8_t index = 0;
    if (watch_device_simulator_address_to_array_index(address, &index) != 0)
    {
        return -1;
    }

    *value = register_values[index];

    return 0;
}

static void watch_device_simulator_add_one_second(
            uint8_t* hours, uint8_t* minutes, uint8_t* seconds)
{
    *seconds += 1;

    if (*seconds == 60)
    {
        *seconds = 0;
        *minutes += 1;
        if (*minutes == 60)
        {
            *minutes = 0;
            *hours += 1;
            if (*hours == 12)
            {
                *hours = 0;
            }
        }
    }
}

void watch_device_simulator_print_time(
            uint8_t hours, uint8_t minutes, uint8_t seconds)
{
    printf("Time: %02d:%02d:%02d\n", hours, minutes, seconds);
}

int watch_device_simulator_increase_time(uint8_t number_of_seconds)
{
    uint8_t time_bits_low, time_bits_high = 0;
    watch_device_simulator_read_byte(ADDRESS_TIME_LOW, &time_bits_low);
    watch_device_simulator_read_byte(ADDRESS_TIME_HIGH, &time_bits_high);

    uint8_t seconds = 0, minutes = 0, hours = 0;
    watch_registers_get_time(
                time_bits_low, time_bits_high, &hours, &minutes, &seconds);

    for (uint8_t i = 0; i < number_of_seconds; i++)
    {
        watch_device_simulator_add_one_second(&hours, &minutes, &seconds);
    }

    watch_registers_set_time_hours(&time_bits_low, &time_bits_high, hours);
    watch_registers_set_time_minutes(&time_bits_low, &time_bits_high, minutes);
    watch_registers_set_time_seconds(&time_bits_low, &time_bits_high, seconds);

    watch_device_simulator_write_byte(ADDRESS_TIME_LOW, time_bits_low);
    watch_device_simulator_write_byte(ADDRESS_TIME_HIGH, time_bits_high);

    return 0;
}