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/*
 * Copyright 2012 Roman Nurik
 *
 * Licensed 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 com.example.spoon.ordering.wizard.model;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import java.util.ArrayList;

/** Represents a single page in the wizard. */
public abstract class Page implements PageTreeNode {
  /** The key into {@link #getData()} used for wizards with simple (single) values. */
  public static final String SIMPLE_DATA_KEY = "_";

  protected ModelCallbacks mCallbacks;

  /** Current wizard values/selections. */
  protected Bundle mData = new Bundle();
  protected String mTitle;
  protected boolean mRequired = false;
  protected String mParentKey;

  protected Page(ModelCallbacks callbacks, String title) {
    mCallbacks = callbacks;
    mTitle = title;
  }

  public Bundle getData() {
    return mData;
  }

  public String getTitle() {
    return mTitle;
  }

  public boolean isRequired() {
    return mRequired;
  }

  void setParentKey(String parentKey) {
    mParentKey = parentKey;
  }

  @Override public Page findByKey(String key) {
    return getKey().equals(key) ? this : null;
  }

  @Override public void flattenCurrentPageSequence(ArrayList dest) {
    dest.add(this);
  }

  public abstract Fragment createFragment();

  public String getKey() {
    return (mParentKey != null) ? mParentKey + ":" + mTitle : mTitle;
  }

  public abstract void getReviewItems(ArrayList dest);

  public boolean isCompleted() {
    return true;
  }

  public void resetData(Bundle data) {
    mData = data;
    notifyDataChanged();
  }

  public void notifyDataChanged() {
    mCallbacks.onPageDataChanged(this);
  }

  public Page setRequired(boolean required) {
    mRequired = required;
    return this;
  }
}