text: 'use strict';
  
  /* jshint ignore:start */
  /**
   * This code was generated by
   * \ / _    _  _|   _  _
   *  | (_)\/(_)(_|\/| |(/_  v1.0.0
   *       /       /
   */
  /* jshint ignore:end */
  
  var Q = require('q');  /* jshint ignore:line */
  var _ = require('lodash');  /* jshint ignore:line */
  var util = require('util');  /* jshint ignore:line */
  var Page = require('../../../../../base/Page');  /* jshint ignore:line */
  var deserialize = require(
      '../../../../../base/deserialize');  /* jshint ignore:line */
  var values = require('../../../../../base/values');  /* jshint ignore:line */
  
  var FieldList;
  var FieldPage;
  var FieldInstance;
  var FieldContext;
  
  /* jshint ignore:start */
  /**
   * Initialize the FieldList
   *
   * PLEASE NOTE that this class contains preview products that are subject to
   * change. Use them with caution. If you currently do not have developer preview
   * access, please contact help@twilio.com.
   *
   * @constructor Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList
   *
   * @param {Twilio.Preview.Understand} version - Version of the resource
   * @param {string} assistantSid - The unique ID of the parent Assistant.
   * @param {string} taskSid - The unique ID of the Task associated with this Field.
   */
  /* jshint ignore:end */
  FieldList = function FieldList(version, assistantSid, taskSid) {
    /* jshint ignore:start */
    /**
     * @function fields
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext#
     *
     * @param {string} sid - sid of instance
     *
     * @returns {Twilio.Preview.Understand.AssistantContext.TaskContext.FieldContext}
     */
    /* jshint ignore:end */
    function FieldListInstance(sid) {
      return FieldListInstance.get(sid);
    }
  
    FieldListInstance._version = version;
    // Path Solution
    FieldListInstance._solution = {assistantSid: assistantSid, taskSid: taskSid};
    FieldListInstance._uri = `/Assistants/${assistantSid}/Tasks/${taskSid}/Fields`;
    /* jshint ignore:start */
    /**
     * Streams FieldInstance records from the API.
     *
     * This operation lazily loads records as efficiently as possible until the limit
     * is reached.
     *
     * The results are passed into the callback function, so this operation is memory
     * efficient.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function each
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @param {object} [opts] - Options for request
     * @param {number} [opts.limit] -
     *         Upper limit for the number of records to return.
     *         each() guarantees never to return more than limit.
     *         Default is no limit
     * @param {number} [opts.pageSize] -
     *         Number of records to fetch per request,
     *         when not set will use the default value of 50 records.
     *         If no pageSize is defined but a limit is defined,
     *         each() will attempt to read the limit with the most efficient
     *         page size, i.e. min(limit, 1000)
     * @param {Function} [opts.callback] -
     *         Function to process each record. If this and a positional
     *         callback are passed, this one will be used
     * @param {Function} [opts.done] -
     *          Function to be called upon completion of streaming
     * @param {Function} [callback] - Function to process each record
     */
    /* jshint ignore:end */
    FieldListInstance.each = function each(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
      if (opts.callback) {
        callback = opts.callback;
      }
      if (_.isUndefined(callback)) {
        throw new Error('Callback function must be provided');
      }
  
      var done = false;
      var currentPage = 1;
      var currentResource = 0;
      var limits = this._version.readLimits({
        limit: opts.limit,
        pageSize: opts.pageSize
      });
  
      function onComplete(error) {
        done = true;
        if (_.isFunction(opts.done)) {
          opts.done(error);
        }
      }
  
      function fetchNextPage(fn) {
        var promise = fn();
        if (_.isUndefined(promise)) {
          onComplete();
          return;
        }
  
        promise.then(function(page) {
          _.each(page.instances, function(instance) {
            if (done || (!_.isUndefined(opts.limit) && currentResource >= opts.limit)) {
              done = true;
              return false;
            }
  
            currentResource++;
            callback(instance, onComplete);
          });
  
          if (!done) {
            currentPage++;
            fetchNextPage(_.bind(page.nextPage, page));
          } else {
            onComplete();
          }
        });
  
        promise.catch(onComplete);
      }
  
      fetchNextPage(_.bind(this.page, this, _.merge(opts, limits)));
    };
  
    /* jshint ignore:start */
    /**
     * Lists FieldInstance records from the API as a list.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function list
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @param {object} [opts] - Options for request
     * @param {number} [opts.limit] -
     *         Upper limit for the number of records to return.
     *         list() guarantees never to return more than limit.
     *         Default is no limit
     * @param {number} [opts.pageSize] -
     *         Number of records to fetch per request,
     *         when not set will use the default value of 50 records.
     *         If no page_size is defined but a limit is defined,
     *         list() will attempt to read the limit with the most
     *         efficient page size, i.e. min(limit, 1000)
     * @param {function} [callback] - Callback to handle list of records
     *
     * @returns {Promise} Resolves to a list of records
     */
    /* jshint ignore:end */
    FieldListInstance.list = function list(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
      var deferred = Q.defer();
      var allResources = [];
      opts.callback = function(resource, done) {
        allResources.push(resource);
  
        if (!_.isUndefined(opts.limit) && allResources.length === opts.limit) {
          done();
        }
      };
  
      opts.done = function(error) {
        if (_.isUndefined(error)) {
          deferred.resolve(allResources);
        } else {
          deferred.reject(error);
        }
      };
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      this.each(opts);
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Retrieve a single page of FieldInstance records from the API.
     *
     * The request is executed immediately.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function page
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @param {object} [opts] - Options for request
     * @param {string} [opts.pageToken] - PageToken provided by the API
     * @param {number} [opts.pageNumber] -
     *          Page Number, this value is simply for client state
     * @param {number} [opts.pageSize] - Number of records to return, defaults to 50
     * @param {function} [callback] - Callback to handle list of records
     *
     * @returns {Promise} Resolves to a list of records
     */
    /* jshint ignore:end */
    FieldListInstance.page = function page(opts, callback) {
      if (_.isFunction(opts)) {
        callback = opts;
        opts = {};
      }
      opts = opts || {};
  
      var deferred = Q.defer();
      var data = values.of({
        'PageToken': opts.pageToken,
        'Page': opts.pageNumber,
        'PageSize': opts.pageSize
      });
  
      var promise = this._version.page({uri: this._uri, method: 'GET', params: data});
  
      promise = promise.then(function(payload) {
        deferred.resolve(new FieldPage(this._version, payload, this._solution));
      }.bind(this));
  
      promise.catch(function(error) {
        deferred.reject(error);
      });
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Retrieve a single target page of FieldInstance records from the API.
     *
     * The request is executed immediately.
     *
     * If a function is passed as the first argument, it will be used as the callback
     * function.
     *
     * @function getPage
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @param {string} [targetUrl] - API-generated URL for the requested results page
     * @param {function} [callback] - Callback to handle list of records
     *
     * @returns {Promise} Resolves to a list of records
     */
    /* jshint ignore:end */
    FieldListInstance.getPage = function getPage(targetUrl, callback) {
      var deferred = Q.defer();
  
      var promise = this._version._domain.twilio.request({method: 'GET', uri: targetUrl});
  
      promise = promise.then(function(payload) {
        deferred.resolve(new FieldPage(this._version, payload, this._solution));
      }.bind(this));
  
      promise.catch(function(error) {
        deferred.reject(error);
      });
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * create a FieldInstance
     *
     * @function create
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @param {object} opts - Options for request
     * @param {string} opts.fieldType -
     *          The unique name or sid of the FieldType. It can be any Built-in Field Type or the unique_name or sid of a custom Field Type.
     * @param {string} opts.uniqueName -
     *          A user-provided string that uniquely identifies this resource as an alternative to the sid. Unique up to 64 characters long.
     * @param {function} [callback] - Callback to handle processed record
     *
     * @returns {Promise} Resolves to processed FieldInstance
     */
    /* jshint ignore:end */
    FieldListInstance.create = function create(opts, callback) {
      if (_.isUndefined(opts)) {
        throw new Error('Required parameter "opts" missing.');
      }
      if (_.isUndefined(opts['fieldType'])) {
        throw new Error('Required parameter "opts[\'fieldType\']" missing.');
      }
      if (_.isUndefined(opts['uniqueName'])) {
        throw new Error('Required parameter "opts[\'uniqueName\']" missing.');
      }
  
      var deferred = Q.defer();
      var data = values.of({
        'FieldType': _.get(opts, 'fieldType'),
        'UniqueName': _.get(opts, 'uniqueName')
      });
  
      var promise = this._version.create({uri: this._uri, method: 'POST', data: data});
  
      promise = promise.then(function(payload) {
        deferred.resolve(new FieldInstance(
          this._version,
          payload,
          this._solution.assistantSid,
          this._solution.taskSid,
          this._solution.sid
        ));
      }.bind(this));
  
      promise.catch(function(error) {
        deferred.reject(error);
      });
  
      if (_.isFunction(callback)) {
        deferred.promise.nodeify(callback);
      }
  
      return deferred.promise;
    };
  
    /* jshint ignore:start */
    /**
     * Constructs a field
     *
     * @function get
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @param {string} sid -
     *          A 34 character string that uniquely identifies this resource.
     *
     * @returns {Twilio.Preview.Understand.AssistantContext.TaskContext.FieldContext}
     */
    /* jshint ignore:end */
    FieldListInstance.get = function get(sid) {
      return new FieldContext(this._version, this._solution.assistantSid, this._solution.taskSid, sid);
    };
  
    /* jshint ignore:start */
    /**
     * Provide a user-friendly representation
     *
     * @function toJSON
     * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldList#
     *
     * @returns Object
     */
    /* jshint ignore:end */
    FieldListInstance.toJSON = function toJSON() {
      return this._solution;
    };
  
    FieldListInstance[util.inspect.custom] = function inspect(depth, options) {
      return util.inspect(this.toJSON(), options);
    };
  
    return FieldListInstance;
  };
  
  
  /* jshint ignore:start */
  /**
   * Initialize the FieldPage
   *
   * PLEASE NOTE that this class contains preview products that are subject to
   * change. Use them with caution. If you currently do not have developer preview
   * access, please contact help@twilio.com.
   *
   * @constructor Twilio.Preview.Understand.AssistantContext.TaskContext.FieldPage
   *
   * @param {Understand} version - Version of the resource
   * @param {Response<string>} response - Response from the API
   * @param {FieldSolution} solution - Path solution
   *
   * @returns FieldPage
   */
  /* jshint ignore:end */
  FieldPage = function FieldPage(version, response, solution) {
    // Path Solution
    this._solution = solution;
  
    Page.prototype.constructor.call(this, version, response, this._solution);
  };
  
  _.extend(FieldPage.prototype, Page.prototype);
  FieldPage.prototype.constructor = FieldPage;
  
  /* jshint ignore:start */
  /**
   * Build an instance of FieldInstance
   *
   * @function getInstance
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldPage#
   *
   * @param {FieldPayload} payload - Payload response from the API
   *
   * @returns FieldInstance
   */
  /* jshint ignore:end */
  FieldPage.prototype.getInstance = function getInstance(payload) {
    return new FieldInstance(
      this._version,
      payload,
      this._solution.assistantSid,
      this._solution.taskSid
    );
  };
  
  /* jshint ignore:start */
  /**
   * Provide a user-friendly representation
   *
   * @function toJSON
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldPage#
   *
   * @returns Object
   */
  /* jshint ignore:end */
  FieldPage.prototype.toJSON = function toJSON() {
    let clone = {};
    _.forOwn(this, function(value, key) {
      if (!_.startsWith(key, '_') && ! _.isFunction(value)) {
        clone[key] = value;
      }
    });
    return clone;
  };
  
  FieldPage.prototype[util.inspect.custom] = function inspect(depth, options) {
    return util.inspect(this.toJSON(), options);
  };
  
  
  /* jshint ignore:start */
  /**
   * Initialize the FieldContext
   *
   * PLEASE NOTE that this class contains preview products that are subject to
   * change. Use them with caution. If you currently do not have developer preview
   * access, please contact help@twilio.com.
   *
   * @constructor Twilio.Preview.Understand.AssistantContext.TaskContext.FieldInstance
   *
   * @property {string} accountSid -
   *          The unique ID of the Account that created this Field.
   * @property {Date} dateCreated - The date that this resource was created
   * @property {Date} dateUpdated - The date that this resource was last updated
   * @property {string} fieldType -
   *          The Field Type of this field. It can be any Built-in Field Type or unique_name or the Field Type sid of a custom Field Type.
   * @property {string} taskSid -
   *          The unique ID of the Task associated with this Field.
   * @property {string} assistantSid - The unique ID of the parent Assistant.
   * @property {string} sid -
   *          A 34 character string that uniquely identifies this resource.
   * @property {string} uniqueName -
   *          A user-provided string that uniquely identifies this resource as an alternative to the sid. Unique up to 64 characters long.
   * @property {string} url - The url
   *
   * @param {Understand} version - Version of the resource
   * @param {FieldPayload} payload - The instance payload
   * @param {sid} assistantSid - The unique ID of the parent Assistant.
   * @param {sid} taskSid - The unique ID of the Task associated with this Field.
   * @param {sid_like} sid -
   *          A 34 character string that uniquely identifies this resource.
   */
  /* jshint ignore:end */
  FieldInstance = function FieldInstance(version, payload, assistantSid, taskSid,
                                          sid) {
    this._version = version;
  
    // Marshaled Properties
    this.accountSid = payload.account_sid; // jshint ignore:line
    this.dateCreated = deserialize.iso8601DateTime(payload.date_created); // jshint ignore:line
    this.dateUpdated = deserialize.iso8601DateTime(payload.date_updated); // jshint ignore:line
    this.fieldType = payload.field_type; // jshint ignore:line
    this.taskSid = payload.task_sid; // jshint ignore:line
    this.assistantSid = payload.assistant_sid; // jshint ignore:line
    this.sid = payload.sid; // jshint ignore:line
    this.uniqueName = payload.unique_name; // jshint ignore:line
    this.url = payload.url; // jshint ignore:line
  
    // Context
    this._context = undefined;
    this._solution = {assistantSid: assistantSid, taskSid: taskSid, sid: sid || this.sid, };
  };
  
  Object.defineProperty(FieldInstance.prototype,
    '_proxy', {
      get: function() {
        if (!this._context) {
          this._context = new FieldContext(
            this._version,
            this._solution.assistantSid,
            this._solution.taskSid,
            this._solution.sid
          );
        }
  
        return this._context;
      }
  });
  
  /* jshint ignore:start */
  /**
   * fetch a FieldInstance
   *
   * @function fetch
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldInstance#
   *
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed FieldInstance
   */
  /* jshint ignore:end */
  FieldInstance.prototype.fetch = function fetch(callback) {
    return this._proxy.fetch(callback);
  };
  
  /* jshint ignore:start */
  /**
   * remove a FieldInstance
   *
   * @function remove
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldInstance#
   *
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed FieldInstance
   */
  /* jshint ignore:end */
  FieldInstance.prototype.remove = function remove(callback) {
    return this._proxy.remove(callback);
  };
  
  /* jshint ignore:start */
  /**
   * Provide a user-friendly representation
   *
   * @function toJSON
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldInstance#
   *
   * @returns Object
   */
  /* jshint ignore:end */
  FieldInstance.prototype.toJSON = function toJSON() {
    let clone = {};
    _.forOwn(this, function(value, key) {
      if (!_.startsWith(key, '_') && ! _.isFunction(value)) {
        clone[key] = value;
      }
    });
    return clone;
  };
  
  FieldInstance.prototype[util.inspect.custom] = function inspect(depth, options)
      {
    return util.inspect(this.toJSON(), options);
  };
  
  
  /* jshint ignore:start */
  /**
   * Initialize the FieldContext
   *
   * PLEASE NOTE that this class contains preview products that are subject to
   * change. Use them with caution. If you currently do not have developer preview
   * access, please contact help@twilio.com.
   *
   * @constructor Twilio.Preview.Understand.AssistantContext.TaskContext.FieldContext
   *
   * @param {Understand} version - Version of the resource
   * @param {sid_like} assistantSid - The unique ID of the Assistant.
   * @param {sid_like} taskSid -
   *          The unique ID of the Task associated with this Field.
   * @param {sid_like} sid -
   *          A 34 character string that uniquely identifies this resource.
   */
  /* jshint ignore:end */
  FieldContext = function FieldContext(version, assistantSid, taskSid, sid) {
    this._version = version;
  
    // Path Solution
    this._solution = {assistantSid: assistantSid, taskSid: taskSid, sid: sid, };
    this._uri = `/Assistants/${assistantSid}/Tasks/${taskSid}/Fields/${sid}`;
  };
  
  /* jshint ignore:start */
  /**
   * fetch a FieldInstance
   *
   * @function fetch
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldContext#
   *
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed FieldInstance
   */
  /* jshint ignore:end */
  FieldContext.prototype.fetch = function fetch(callback) {
    var deferred = Q.defer();
    var promise = this._version.fetch({uri: this._uri, method: 'GET'});
  
    promise = promise.then(function(payload) {
      deferred.resolve(new FieldInstance(
        this._version,
        payload,
        this._solution.assistantSid,
        this._solution.taskSid,
        this._solution.sid
      ));
    }.bind(this));
  
    promise.catch(function(error) {
      deferred.reject(error);
    });
  
    if (_.isFunction(callback)) {
      deferred.promise.nodeify(callback);
    }
  
    return deferred.promise;
  };
  
  /* jshint ignore:start */
  /**
   * remove a FieldInstance
   *
   * @function remove
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldContext#
   *
   * @param {function} [callback] - Callback to handle processed record
   *
   * @returns {Promise} Resolves to processed FieldInstance
   */
  /* jshint ignore:end */
  FieldContext.prototype.remove = function remove(callback) {
    var deferred = Q.defer();
    var promise = this._version.remove({uri: this._uri, method: 'DELETE'});
  
    promise = promise.then(function(payload) {
      deferred.resolve(payload);
    }.bind(this));
  
    promise.catch(function(error) {
      deferred.reject(error);
    });
  
    if (_.isFunction(callback)) {
      deferred.promise.nodeify(callback);
    }
  
    return deferred.promise;
  };
  
  /* jshint ignore:start */
  /**
   * Provide a user-friendly representation
   *
   * @function toJSON
   * @memberof Twilio.Preview.Understand.AssistantContext.TaskContext.FieldContext#
   *
   * @returns Object
   */
  /* jshint ignore:end */
  FieldContext.prototype.toJSON = function toJSON() {
    return this._solution;
  };
  
  FieldContext.prototype[util.inspect.custom] = function inspect(depth, options) {
    return util.inspect(this.toJSON(), options);
  };
  
  module.exports = {
    FieldList: FieldList,
    FieldPage: FieldPage,
    FieldInstance: FieldInstance,
    FieldContext: FieldContext
  };
  