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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.zeppelin.display;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.apache.zeppelin.display.ui.CheckBox;
import org.apache.zeppelin.display.ui.OptionInput.ParamOption;
import org.apache.zeppelin.display.ui.Password;
import org.apache.zeppelin.display.ui.Select;
import org.apache.zeppelin.display.ui.TextBox;

import java.io.Serializable;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;


/**
 * Settings of a form.
 */
public class GUI implements Serializable {

  private static Gson gson = new GsonBuilder()
      .registerTypeAdapterFactory(Input.TypeAdapterFactory)
      .create();

  Map params = new HashMap<>(); // form parameters from client
  Map forms = new LinkedHashMap<>(); // form configuration

  public GUI() {

  }

  public void setParams(Map values) {
    this.params = values;
  }

  public Map getParams() {
    return params;
  }

  public Map getForms() {
    return forms;
  }

  public void setForms(Map forms) {
    this.forms = forms;
  }

  @Deprecated
  public Object input(String id) {
    return textbox(id, "");
  }

  @Deprecated
  public Object input(String id, Object defaultValue) {
    return textbox(id, defaultValue.toString());
  }

  public Object textbox(String id, String defaultValue) {
    // first find values from client and then use default
    Object value = params.get(id);
    if (value == null) {
      value = defaultValue;
    }
    forms.put(id, new TextBox(id, defaultValue));
    params.put(id, value);
    return value;
  }

  public Object textbox(String id) {
    return textbox(id, "");
  }

  public Object password(String id) {
    forms.put(id, new Password(id));
    return params.get(id);
  }

  public Object select(String id, ParamOption[] options, Object defaultValue) {
    if (defaultValue == null && options != null && options.length > 0) {
      defaultValue = options[0].getValue();
    }
    forms.put(id, new Select(id, defaultValue, options));
    Object value = params.get(id);
    if (value == null) {
      value = defaultValue;
    }
    params.put(id, value);
    return value;
  }

  public List