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package io.vertx.codetrans;

import java.util.Collections;
import java.util.List;

/**
 * @author Julien Viet
 */
public class JsonObjectModel extends ExpressionModel {

  public static ExpressionModel CLASS_MODEL = forNew(args -> {
    switch (args.size()) {
      case 0:
        return new JsonObjectModel(Collections.emptyList());
      default:
        throw new UnsupportedOperationException();
    }
  });

  private final List entries;

  private JsonObjectModel(List entries) {
    this.entries = entries;
  }

  public Iterable getMembers() {
    return entries;
  }

  @Override
  public ExpressionModel onMemberSelect(String identifier) {
    return new ExpressionModel() {
      @Override
      public ExpressionModel onMethodInvocation(List arguments) {
        switch (identifier) {
          case "put":
            return new JsonObjectModel(Helper.append(entries, new Member.Single(arguments.get(0)).append(arguments.get(1))));
          default:
            throw new UnsupportedOperationException("Method " + identifier + " not yet implemented");
        }
      }
    };
  }

  @Override
  public void render(CodeWriter writer) {
    writer.getLang().renderJsonObject(this, writer);
  }
}