/*
 * Copyright 2009 Google Inc.
 * 
 * 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.google.jstestdriver.html;

import com.google.jstestdriver.html.HtmlDocNodeFactory.CreateNodeStrategy;
import com.google.jstestdriver.token.EscapingWriter;
import com.google.jstestdriver.token.Node;
import com.google.jstestdriver.token.Token;

import java.io.IOException;
import java.io.Writer;
import java.util.List;


/**
 * Represents an HTML doc defined inside a block.
 * @author corysmith@google.com (Cory Smith)
 *
 */
public class HtmlDocNestedNode extends HtmlDocNode{

  private static final char[] JS_END_STATEMENT = "window.document);".toCharArray();
  private static final char[] JS_ARG_SEP = "',".toCharArray();
  private static final char[] JS_THIS = "this.".toCharArray();
  private static final char[] JS_TO_HTML = " = jstestdriver.toHtml('".toCharArray();
  private static final char[] JS_APPEND_HTML = "jstestdriver.appendHtml('".toCharArray();

  public HtmlDocNestedNode(Token id, List<Token> tokens) {
    super(id, tokens);
  } 

  @Override
  public void write(Writer writer) {
    EscapingWriter escaping = new EscapingWriter(writer);
    try {
      if (id.contains('+')) {
        writer.write(JS_APPEND_HTML);
      } else {
        writer.write(JS_THIS);
        id.write(escaping);
        writer.write(JS_TO_HTML);
      }
      for (Token fragment : html) {
        fragment.write(escaping);
      }
      writer.write(JS_ARG_SEP);
      writer.write(JS_END_STATEMENT);
      for (int i = 0; i < escaping.getEscapedCount('\n'); i++) {
        writer.append('\n');
      }
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static class NestedNodeStrategy implements CreateNodeStrategy{
    public Node create(Token id, List<Token> html) {
      return new HtmlDocNestedNode(id, html);
    }
  }
}