/*
 * The MIT License
 * Copyright (c) 2012 Microsoft Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package microsoft.exchange.webservices.data.core;

import microsoft.exchange.webservices.data.core.response.IGetObjectInstanceDelegate;
import microsoft.exchange.webservices.data.core.service.ServiceObject;
import microsoft.exchange.webservices.data.core.enumeration.misc.XmlNamespace;
import microsoft.exchange.webservices.data.core.exception.service.local.ServiceLocalException;
import microsoft.exchange.webservices.data.util.DateTimeUtils;

import java.io.InputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.TimeZone;

/**
 * XML reader.
 */
public class EwsServiceXmlReader extends EwsXmlReader {

  /**
   * The service.
   */
  private ExchangeService service;

  /**
   * Initializes a new instance of the EwsXmlReader class.
   *
   * @param stream the stream
   * @param service the service
   * @throws Exception on error
   */
  public EwsServiceXmlReader(InputStream stream, ExchangeService service)
      throws Exception {
    super(stream);
    this.service = service;
  }

  /**
   * Reads the element value as date time.
   *
   * @return Element value
   * @throws Exception the exception
   */
  public Date readElementValueAsDateTime() throws Exception {
    return DateTimeUtils.convertDateTimeStringToDate(readElementValue());
  }

  /**
   * Reads the element value as unspecified date.
   *
   * @return element value
   * @throws Exception on error
   */
  public Date readElementValueAsUnspecifiedDate() throws Exception {
    return DateTimeUtils.convertDateStringToDate(readElementValue());
  }

  /**
   * Reads the element value as date time, assuming it is unbiased (e.g.
   * 2009/01/01T08:00) and scoped to service's time zone.
   *
   * @return Date
   * @throws Exception the exception
   */
  public Date readElementValueAsUnbiasedDateTimeScopedToServiceTimeZone()
      throws Exception {
    // Convert the element's value to a DateTime with no adjustment.
    String date = this.readElementValue();

    try {
      DateFormat formatter =
          new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
      formatter.setTimeZone(TimeZone.getTimeZone("UTC"));
      return formatter.parse(date);
    } catch (Exception e) {
      DateFormat formatter = new SimpleDateFormat(
          "yyyy-MM-dd'T'HH:mm:ss.SSS");
      formatter.setTimeZone(TimeZone.getTimeZone("UTC"));
      return formatter.parse(date);
    }
  }

  /**
   * Reads the element value as date time.
   *
   * @param xmlNamespace the xml namespace
   * @param localName    the local name
   * @return the date
   * @throws Exception the exception
   */
  public Date readElementValueAsDateTime(XmlNamespace xmlNamespace, String localName) throws Exception {
    return DateTimeUtils.convertDateTimeStringToDate(readElementValue(xmlNamespace, localName));
  }

  /**
   * Reads the service objects collection from XML.
   *
   * @param <TServiceObject>          the generic type
   * @param collectionXmlElementName  the collection xml element name
   * @param getObjectInstanceDelegate the get object instance delegate
   * @param clearPropertyBag          the clear property bag
   * @param requestedPropertySet      the requested property set
   * @param summaryPropertiesOnly     the summary property only
   * @return the list
   * @throws Exception the exception
   */
  public <TServiceObject extends ServiceObject> List<TServiceObject>
  readServiceObjectsCollectionFromXml(
      String collectionXmlElementName,
      IGetObjectInstanceDelegate<ServiceObject>
          getObjectInstanceDelegate,
      boolean clearPropertyBag, PropertySet requestedPropertySet,
      boolean summaryPropertiesOnly) throws Exception {

    List<TServiceObject> serviceObjects = new ArrayList<TServiceObject>();
    TServiceObject serviceObject;

    this.readStartElement(XmlNamespace.Messages, collectionXmlElementName);

    if (!this.isEmptyElement()) {
      do {
        this.read();

        if (this.isStartElement()) {
          serviceObject = (TServiceObject) getObjectInstanceDelegate
              .getObjectInstanceDelegate(this.getService(), this
                  .getLocalName());
          if (serviceObject == null) {
            this.skipCurrentElement();
          } else {
            if (!(this.getLocalName()).equals(serviceObject
                .getXmlElementName())) {

              throw new ServiceLocalException(String
                  .format(
                      "The type of the " + "object in " +
                          "the store (%s)" +
                          " does not match that" +
                          " of the " +
                          "local object (%s).",
                      this.getLocalName(), serviceObject
                          .getXmlElementName()));
            }
            serviceObject.loadFromXml(this, clearPropertyBag,
                requestedPropertySet, summaryPropertiesOnly);

            serviceObjects.add(serviceObject);
          }
        }
      } while (!this.isEndElement(XmlNamespace.Messages,
          collectionXmlElementName));
    } else {
      // For empty elements read End Element tag
      // i.e. position cursor on End Element
      this.read();
    }

    return serviceObjects;

  }

  /**
   * Gets the service.
   *
   * @return the service
   */
  public ExchangeService getService() {
    return service;
  }

  /**
   * Sets the service.
   *
   * @param service the new service
   */
  public void setService(ExchangeService service) {
    this.service = service;
  }

}