#include <ArduinoJson.h>

#define JSON_SIZE   512

namespace Ha {

    void buildDeviceConfig(JsonDocument& jsonDoc) {
        JsonObject device = jsonDoc.createNestedObject("device");
        device["name"] = "ESP Clock";
        device["suggested_area"] = "Living room";
        JsonArray connections = device.createNestedArray("connections");
        JsonArray mac = connections.createNestedArray();
        mac.add("mac");
        mac.add(WiFi.macAddress());
    }

    void buildCommandConfig(char(&output)[JSON_SIZE], const char* name, const char* uniqueId, const char* commandTopic) {
        StaticJsonDocument<JSON_SIZE> jsonDoc;
        buildDeviceConfig(jsonDoc);
        jsonDoc["name"] = name;
        jsonDoc["unique_id"] = uniqueId;
        jsonDoc["command_topic"] = commandTopic;
        serializeJson(jsonDoc, output);
    }

    struct SensorConfig {
        const char* deviceClass;
        const char* unitMeasure;
        const char* valueTemplate;

        void buildConfig(char(&output)[JSON_SIZE], const char* name, const char* uniqueId, const char* stateTopic) {
            StaticJsonDocument<JSON_SIZE> jsonDoc;
            buildDeviceConfig(jsonDoc);
            jsonDoc["name"] = name;
            jsonDoc["unique_id"] = uniqueId;
            jsonDoc["state_topic"] = stateTopic;
            jsonDoc["device_class"] = deviceClass;
            jsonDoc["unit_of_measurement"] = unitMeasure;
            jsonDoc["value_template"] = valueTemplate;
            serializeJson(jsonDoc, output);
        }

    };

    struct TemperatureConfig : SensorConfig {
        TemperatureConfig() {
            deviceClass = "temperature";
            unitMeasure = "°C";
            valueTemplate = "{{ value_json.temperature }}";
        }
    };

    struct PressureConfig : SensorConfig {
        PressureConfig() {
            deviceClass = "pressure";
            unitMeasure = "hPa";
            valueTemplate = "{{ value_json.pressure }}";
        }
    };

    struct AltitudeConfig : SensorConfig {
        AltitudeConfig() {
            deviceClass = "distance";
            unitMeasure = "m";
            valueTemplate = "{{ value_json.altitude }}";
        }
    };
}