#include "ha_discovery_json.h"

#include <ArduinoJson.h>

bool ha_build_discovery_sensor_payload(const char *device_id, const char *key, const char *name, const char *unit,
                                       const char *device_class, const char *state_topic, const char *value_template,
                                       const char *manufacturer, String &out_payload) {
  if (!device_id || !key || !name || !state_topic || !value_template || !manufacturer) {
    return false;
  }

  StaticJsonDocument<256> doc;
  String unique_id = String(device_id) + "_" + key;
  String sensor_name = String(device_id) + " " + name;

  doc["name"] = sensor_name;
  doc["state_topic"] = state_topic;
  doc["unique_id"] = unique_id;
  if (unit && unit[0] != '\0') {
    doc["unit_of_measurement"] = unit;
  }
  if (device_class && device_class[0] != '\0') {
    doc["device_class"] = device_class;
  }
  doc["value_template"] = value_template;

  JsonObject device = doc.createNestedObject("device");
  JsonArray identifiers = device.createNestedArray("identifiers");
  identifiers.add(String(device_id));
  device["name"] = String(device_id);
  device["model"] = "DD3-LoRa-Bridge";
  device["manufacturer"] = manufacturer;

  out_payload = "";
  size_t len = serializeJson(doc, out_payload);
  return len > 0;
}