/**
 * @module ol/format/OWS
 */
import {inherits} from '../index.js';
import XLink from '../format/XLink.js';
import XML from '../format/XML.js';
import XSD from '../format/XSD.js';
import _ol_xml_ from '../xml.js';

/**
 * @constructor
 * @extends {ol.format.XML}
 */
var OWS = function() {
  XML.call(this);
};

inherits(OWS, XML);


/**
 * @inheritDoc
 */
OWS.prototype.readFromDocument = function(doc) {
  for (var n = doc.firstChild; n; n = n.nextSibling) {
    if (n.nodeType == Node.ELEMENT_NODE) {
      return this.readFromNode(n);
    }
  }
  return null;
};


/**
 * @inheritDoc
 */
OWS.prototype.readFromNode = function(node) {
  var owsObject = _ol_xml_.pushParseAndPop({},
      OWS.PARSERS_, node, []);
  return owsObject ? owsObject : null;
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The address.
 */
OWS.readAddress_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop({},
      OWS.ADDRESS_PARSERS_, node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The values.
 */
OWS.readAllowedValues_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop({},
      OWS.ALLOWED_VALUES_PARSERS_, node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The constraint.
 */
OWS.readConstraint_ = function(node, objectStack) {
  var name = node.getAttribute('name');
  if (!name) {
    return undefined;
  }
  return _ol_xml_.pushParseAndPop({'name': name},
      OWS.CONSTRAINT_PARSERS_, node,
      objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The contact info.
 */
OWS.readContactInfo_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop({},
      OWS.CONTACT_INFO_PARSERS_, node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The DCP.
 */
OWS.readDcp_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop({},
      OWS.DCP_PARSERS_, node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The GET object.
 */
OWS.readGet_ = function(node, objectStack) {
  var href = XLink.readHref(node);
  if (!href) {
    return undefined;
  }
  return _ol_xml_.pushParseAndPop({'href': href},
      OWS.REQUEST_METHOD_PARSERS_, node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The HTTP object.
 */
OWS.readHttp_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop({}, OWS.HTTP_PARSERS_,
      node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The operation.
 */
OWS.readOperation_ = function(node, objectStack) {
  var name = node.getAttribute('name');
  var value = _ol_xml_.pushParseAndPop({},
      OWS.OPERATION_PARSERS_, node, objectStack);
  if (!value) {
    return undefined;
  }
  var object = /** @type {Object} */
      (objectStack[objectStack.length - 1]);
  object[name] = value;
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The operations metadata.
 */
OWS.readOperationsMetadata_ = function(node,
    objectStack) {
  return _ol_xml_.pushParseAndPop({},
      OWS.OPERATIONS_METADATA_PARSERS_, node,
      objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The phone.
 */
OWS.readPhone_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop({},
      OWS.PHONE_PARSERS_, node, objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The service identification.
 */
OWS.readServiceIdentification_ = function(node,
    objectStack) {
  return _ol_xml_.pushParseAndPop(
      {}, OWS.SERVICE_IDENTIFICATION_PARSERS_, node,
      objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The service contact.
 */
OWS.readServiceContact_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop(
      {}, OWS.SERVICE_CONTACT_PARSERS_, node,
      objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {Object|undefined} The service provider.
 */
OWS.readServiceProvider_ = function(node, objectStack) {
  return _ol_xml_.pushParseAndPop(
      {}, OWS.SERVICE_PROVIDER_PARSERS_, node,
      objectStack);
};


/**
 * @param {Node} node Node.
 * @param {Array.<*>} objectStack Object stack.
 * @private
 * @return {string|undefined} The value.
 */
OWS.readValue_ = function(node, objectStack) {
  return XSD.readString(node);
};


/**
 * @const
 * @type {Array.<string>}
 * @private
 */
OWS.NAMESPACE_URIS_ = [
  null,
  'http://www.opengis.net/ows/1.1'
];


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'ServiceIdentification': _ol_xml_.makeObjectPropertySetter(
          OWS.readServiceIdentification_),
      'ServiceProvider': _ol_xml_.makeObjectPropertySetter(
          OWS.readServiceProvider_),
      'OperationsMetadata': _ol_xml_.makeObjectPropertySetter(
          OWS.readOperationsMetadata_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.ADDRESS_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'DeliveryPoint': _ol_xml_.makeObjectPropertySetter(
          XSD.readString),
      'City': _ol_xml_.makeObjectPropertySetter(XSD.readString),
      'AdministrativeArea': _ol_xml_.makeObjectPropertySetter(
          XSD.readString),
      'PostalCode': _ol_xml_.makeObjectPropertySetter(XSD.readString),
      'Country': _ol_xml_.makeObjectPropertySetter(XSD.readString),
      'ElectronicMailAddress': _ol_xml_.makeObjectPropertySetter(
          XSD.readString)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.ALLOWED_VALUES_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'Value': _ol_xml_.makeObjectPropertyPusher(OWS.readValue_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.CONSTRAINT_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'AllowedValues': _ol_xml_.makeObjectPropertySetter(
          OWS.readAllowedValues_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.CONTACT_INFO_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'Phone': _ol_xml_.makeObjectPropertySetter(OWS.readPhone_),
      'Address': _ol_xml_.makeObjectPropertySetter(OWS.readAddress_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.DCP_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'HTTP': _ol_xml_.makeObjectPropertySetter(OWS.readHttp_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.HTTP_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'Get': _ol_xml_.makeObjectPropertyPusher(OWS.readGet_),
      'Post': undefined // TODO
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.OPERATION_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'DCP': _ol_xml_.makeObjectPropertySetter(OWS.readDcp_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.OPERATIONS_METADATA_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'Operation': OWS.readOperation_
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.PHONE_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'Voice': _ol_xml_.makeObjectPropertySetter(XSD.readString),
      'Facsimile': _ol_xml_.makeObjectPropertySetter(XSD.readString)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.REQUEST_METHOD_PARSERS_ = _ol_xml_.makeStructureNS(
    OWS.NAMESPACE_URIS_, {
      'Constraint': _ol_xml_.makeObjectPropertyPusher(
          OWS.readConstraint_)
    });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.SERVICE_CONTACT_PARSERS_ =
    _ol_xml_.makeStructureNS(
        OWS.NAMESPACE_URIS_, {
          'IndividualName': _ol_xml_.makeObjectPropertySetter(
              XSD.readString),
          'PositionName': _ol_xml_.makeObjectPropertySetter(XSD.readString),
          'ContactInfo': _ol_xml_.makeObjectPropertySetter(
              OWS.readContactInfo_)
        });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.SERVICE_IDENTIFICATION_PARSERS_ =
    _ol_xml_.makeStructureNS(
        OWS.NAMESPACE_URIS_, {
          'Abstract': _ol_xml_.makeObjectPropertySetter(XSD.readString),
          'AccessConstraints': _ol_xml_.makeObjectPropertySetter(XSD.readString),
          'Fees': _ol_xml_.makeObjectPropertySetter(XSD.readString),
          'Title': _ol_xml_.makeObjectPropertySetter(XSD.readString),
          'ServiceTypeVersion': _ol_xml_.makeObjectPropertySetter(
              XSD.readString),
          'ServiceType': _ol_xml_.makeObjectPropertySetter(XSD.readString)
        });


/**
 * @const
 * @type {Object.<string, Object.<string, ol.XmlParser>>}
 * @private
 */
OWS.SERVICE_PROVIDER_PARSERS_ =
    _ol_xml_.makeStructureNS(
        OWS.NAMESPACE_URIS_, {
          'ProviderName': _ol_xml_.makeObjectPropertySetter(XSD.readString),
          'ProviderSite': _ol_xml_.makeObjectPropertySetter(XLink.readHref),
          'ServiceContact': _ol_xml_.makeObjectPropertySetter(
              OWS.readServiceContact_)
        });
export default OWS;