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package io.contek.zeus;

import com.google.common.io.BaseEncoding;

import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import java.util.Random;

import static com.google.common.io.BaseEncoding.base32Hex;

@Immutable
public final class ClientOrderLabel extends StringKey {

  private static final BaseEncoding ENCODING = base32Hex().lowerCase().omitPadding();
  private static final Random random = new Random();

  private ClientOrderLabel(String stringValue) {
    super(stringValue);
  }

  public static ClientOrderLabel nextBase32() {
    byte[] bytes = new byte[8];
    random.nextBytes(bytes);
    return of(ENCODING.encode(bytes));
  }

  public static ClientOrderLabel of(String stringValue) {
    ClientOrderLabel result = ofNullable(stringValue);
    if (result == null) {
      throw new IllegalArgumentException(stringValue);
    }
    return result;
  }

  @Nullable
  public static ClientOrderLabel ofNullable(@Nullable String stringValue) {
    if (stringValue == null || stringValue.isEmpty()) {
      return null;
    }
    return new ClientOrderLabel(stringValue);
  }
}