/**
 * @fileoverview SIP NameAddrHeader
 */

/**
 * @augments SIP
 * @class Class creating a Name Address SIP header.
 *
 * @param {SIP.URI} uri
 * @param {String} [displayName]
 * @param {Object} [parameters]
 *
 */
module.exports = function (SIP) {
var NameAddrHeader;

NameAddrHeader = function(uri, displayName, parameters) {
  var param;

  // Checks
  if(!uri || !(uri instanceof SIP.URI)) {
    throw new TypeError('missing or invalid "uri" parameter');
  }

  // Initialize parameters
  this.uri = uri;
  this.parameters = {};

  for (param in parameters) {
    this.setParam(param, parameters[param]);
  }

  Object.defineProperties(this, {
    displayName: {
      get: function() { return displayName; },
      set: function(value) {
        displayName = (value === 0) ? '0' : value;
      }
    }
  });
};
NameAddrHeader.prototype = {
  setParam: function (key, value) {
    if(key) {
      this.parameters[key.toLowerCase()] = (typeof value === 'undefined' || value === null) ? null : value.toString();
    }
  },
  getParam: SIP.URI.prototype.getParam,
  hasParam: SIP.URI.prototype.hasParam,
  deleteParam: SIP.URI.prototype.deleteParam,
  clearParams: SIP.URI.prototype.clearParams,

  clone: function() {
    return new NameAddrHeader(
      this.uri.clone(),
      this.displayName,
      JSON.parse(JSON.stringify(this.parameters)));
  },

  toString: function() {
    var body, parameter;

    body  = (this.displayName || this.displayName === 0) ? '"' + this.displayName + '" ' : '';
    body += '<' + this.uri.toString() + '>';

    for (parameter in this.parameters) {
      body += ';' + parameter;

      if (this.parameters[parameter] !== null) {
        body += '='+ this.parameters[parameter];
      }
    }

    return body;
  }
};


/**
  * Parse the given string and returns a SIP.NameAddrHeader instance or undefined if
  * it is an invalid NameAddrHeader.
  * @public
  * @param {String} name_addr_header
  */
NameAddrHeader.parse = function(name_addr_header) {
  name_addr_header = SIP.Grammar.parse(name_addr_header,'Name_Addr_Header');

  if (name_addr_header !== -1) {
    return name_addr_header;
  } else {
    return undefined;
  }
};

SIP.NameAddrHeader = NameAddrHeader;
};
