#ifndef SENSOR3_DATA_H
#define SENSOR3_DATA_H

#include "base.h"
#include <ArduinoJson.h>
#include "wifi.h"
#include "mqtt.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;
  };

  Entry buffer[size];

  Entry *bufferRead = buffer;

  Entry *bufferWrite = buffer;

  size_t usage = 0;

public:

  template<typename U = T, typename = ExtendsIData<U>>
  explicit Cache() {
    // -
  }

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

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

  [[nodiscard]] size_t getUsage() const {
    return usage;
  }

  [[nodiscard]] size_t getSize() const {
    return size;
  }

};

#endif