TempTrack-ESP/include/storage.h

#pragma once
#include <stddef.h>
#include <stdint.h>

#include "temperature.h"

constexpr uint8_t temperatureSensorCount = 2;

constexpr size_t storageSize = 80000;
constexpr uint16_t storageIntervalInSeconds = 15;
constexpr size_t maximumStorageDurationInHours = (storageSize / TEMPERATURE_SENSOR_MAX_COUNT) * storageIntervalInSeconds / 3600;

// Max size: 7664
constexpr size_t maxRtcStorageSize = 7664;
constexpr size_t rtcStorageSize = 7550;

constexpr size_t maxEepromSize = 13350;
constexpr size_t eepromSize = 13350;

constexpr size_t totalStorageSize = rtcStorageSize + eepromSize;

// The minimum temperature to store, in millidegrees celcius
// True minimum will be higher by 1°, since two values are reserved 
constexpr long temperatureShiftForStorage = -40000;
constexpr long maximumTemperature = temperatureShiftForStorage + 255 * 500;

constexpr uint8_t temperatureMaximumValue = 255;

enum class StorageFlags: uint8_t {
    HasInitializedEEPROM = 1,
    FailedToInitEEPROM = 2,
    FailedToWriteEEPROM = 4,
    RTCStorageOverflow = 5,
};

void storageConfigure(bool isFirstRun);

/**
 * @brief Save temperatures for both temperature sensors
 * 
 * Temperatures are in millidegrees celsius
 * 
 * @param temperatures The array of temperatures
 * @param count The number of elements in the array
 */
void saveTemperatures(Temperature* temperatures);

uint16_t getTotalNumberOfStoredBytes();

uint16_t getNumberOfMeasurements();

uint32_t getTotalNumberOfMeasurements();

uint8_t getLastTemperature(uint8_t sensorIndex);

uint16_t getTimeSinceValidTemperature(uint8_t sensorIndex);

uint16_t getRecordedBytesAtOffset(uint8_t* buffer, uint16_t offset, uint16_t count);

void discardAllRecordedBytes();

uint8_t getStorageErrorFlags();