#ifndef SENSOR3_DATA_H
#define SENSOR3_DATA_H

#include "base.h"
#include <ArduinoJson.h>

struct IData {

  virtual void toJson(JsonObject &json) const = 0;

};

template<typename Data>
using ExtendsIData = std::enable_if_t<std::is_base_of_v<IData, Data>>;

template<typename T, int size>
class Cache {

private:

  struct Entry {
    time_t timestamp = 0;
    T data;
  };

  const char *name;

  Entry buffer[size];

  Entry *bufferRead = buffer;

  Entry *bufferWrite = buffer;

  size_t dataCount = 0;

public:

  template<typename U = T, typename = ExtendsIData<U>>
  explicit Cache(const char *name) : name(name) {
    // -
  }

  bool add(const time_t timestamp, const T &data) {
    if (dataCount >= size) {
      return false;
    }
    bufferWrite->timestamp = timestamp;
    bufferWrite->data = data;
    bufferWrite = (bufferWrite - buffer + 1) % size + buffer;
    dataCount++;
    return true;
  }

  void loop() {
    if (dataCount == 0 || !isTimeSet()) {
      return;
    }
    JsonDocument json;
    json["timestamp"] = correctTime(bufferRead->timestamp);
    JsonObject data = json["data"].to<JsonObject>();
    bufferRead->data.toJson(data);
    if (mqttPublishData(name, json)) {
      bufferRead = (bufferRead - buffer + 1) % size + buffer;
      dataCount--;
    }
  }

};

#endif