package it.cavallium;

import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.time.Duration;
import java.util.Optional;
import java.util.concurrent.atomic.AtomicReference;
import org.slf4j.event.Level;

public class SettingsServiceImpl implements SettingsService {

	private static final Gson gson = new Gson();
	private final AtomicReference<Duration> delayBetweenAdds = new AtomicReference<>(Duration.ZERO);

	public SettingsServiceImpl() {
		synchronized (gson) {
			if (Files.exists(Paths.get("settings.json"))) {
				try {
					var settings = gson.fromJson(Files.readString(Paths.get("settings.json"), StandardCharsets.UTF_8), JsonObject.class);
					if (settings != null) {
						Optional.ofNullable(settings.getAsJsonPrimitive("delayBetweenAdds")).ifPresent(seconds -> {
							this.delayBetweenAdds.set(Duration.ofSeconds(seconds.getAsInt()));
						});
					}
				} catch (Exception e) {
					e.printStackTrace();
				};
			}
		}
	}

	private void saveSettings() {
		synchronized (gson) {
			var settings = new JsonObject();
			settings.addProperty("delayBetweenAdds", delayBetweenAdds.get().toSeconds());
			try {
				Files.writeString(Paths.get("settings.json"), gson.toJson(settings), StandardCharsets.UTF_8, StandardOpenOption.CREATE);
			} catch (IOException e) {
				App.getLogService().append(Level.ERROR, e.getLocalizedMessage());
			}
		}
	}

	@Override
	public void setDelayBetweenAdds(Duration duration) {
		delayBetweenAdds.set(duration);
		saveSettings();
	}

	@Override
	public Duration getDelayBetweenAdds() {
		return delayBetweenAdds.get();
	}
}