/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2017 Dan "Ducky" Little
 *
 * 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.
 */

/** Select Service.
 *
 *  Used to select a set of features using a given geometry.
 *
 */
function SelectService(Application, options) {
  /** Define the title of the service. */
  this.title = options.title ? options.title : "Select";

  /** Title to show at the top of the results. */
  this.resultsTitle = options.resultsTitle ? options.resultsTitle : "Select Results";

  /** Header template for rendering before features. */
  this.headerTemplate = options.headerTemplate ? options.headerTemplate : "@select-header";

  /** Template to use for rendering returned features. */
  this.template = options.template ? options.template : "@select";

  /** Toggle whether the grid should attempt rendering. */
  this.showGrid = options.showGrid !== undefined ? options.showGrid : true;

  /** Footer template for rendering before features. */
  this.footerTemplate = options.footerTemplate ? options.footerTemplate : "@select-footer";

  /** Name will be set by the application when the service is registered. */
  this.name = "";

  /** Define the highlight layer */
  this.highlightPath = options.highlightPath ? options.highlightPath : "highlight/highlight";

  /** Limit the number of selection tools available */
  this.tools = options.tools
    ? options.tools
    : {
        Box: true,
        Point: true,
        MultiPoint: true,
        Polygon: true,
        LineString: true,
        Select: true,
        Modify: true,
        default: "Polygon",
        buffer: true,
      };

  /** autoGo = true instructs the service to query whenever
   *                the geometry has changed.
   */
  this.autoGo = options.autoGo === true;

  /** keepAlive = true will keep the service in 'query mode'
   *                   in the background, until it is explicitly turned off.
   */
  this.keepAlive = options.keepAlive === true;

  /** Automatically zoom to results */
  this.zoomToResults = options.zoomToResults === true;

  /** Minimize the grid at results time */
  this.gridMinimized = options.gridMinimized === true;

  /** User input fields, select allows choosing a layer */
  this.fields = options.fields || [
    {
      type: "layers-list",
      name: "layer",
      label: "Select from",
      default: options.defaultLayer,
      filter: {
        // ensure that the layer is visible to prevent confusion.
        requireVisible: true,
        // but require it have a select template.
        withTemplate: ["select", "select-header", "select-grid-columns", "gridColumns"],
      },
    },
  ];

  /** When true, put the query fields above any drawing tools. */
  this.fieldsFirst = true;

  /** When defined, label the draw tools */
  this.drawToolsLabel = options.drawToolsLabel !== undefined ? options.drawToolsLabel : "Using";

  /** Allow shapes to be buffered. */
  this.bufferAvailable = true;

  /** This function is called everytime there is an select query.
   *
   *  @param selection contains a GeoJSON feature describing the
   *                   geography to be used for the query.
   *
   *  @param fields    is an array containing any user-input
   *                   given to the service.
   */
  this.query = function (selection, fields) {
    if (selection && selection.length > 0) {
      // get the query layer.
      var queryLayer = fields[0].value;
      // check which templates should try and load
      var templates = [this.template];
      if (this.showGrid) {
        const templateName = this.alias ? this.alias : this.name;
        templates.push("@" + templateName + "-grid-columns");
        templates.push("@" + templateName + "-grid-row");
        templates.push("@gridColumns");
        templates.push("@gridRow");
      }

      // dispatch the query against on the query layer!
      Application.dispatchQuery(this.name, selection, [], [queryLayer], templates);
    } else {
      // throw up this handy dialog.
      var msg = "A selection geometry is required for this query.";
      var serviceName = this.name;
      var self = this;
      var onClose = function () {
        Application.startService(serviceName, {
          changeTool: self.tools.default,
        });
      };

      Application.alert("selection-required", msg, onClose);
    }
  };

  /** resultsAsHtml is the function used to populate the Service Tab
   *                after the service has finished querying.
   */
  this.resultsAsHtml = function (queryId, query) {
    // initialize empty html content.
    var html = "";

    // iterate through each layer that was queried by the service.
    for (var i = 0, ii = query.layers.length; i < ii; i++) {
      // short-handing the item in the loop.
      var path = query.layers[i];

      // add the header contents
      html += Application.renderTemplate(path, this.headerTemplate, query);

      // check to see that the layer has results and features were returned.
      if (query.results[path]) {
        html += Application.renderFeaturesWithTemplate(query, path, this.template);
      }

      // and footer contents.
      html += Application.renderTemplate(path, this.footerTemplate, query);
    }

    // return the html for rendering.
    return html;
  };
}

if (typeof module !== "undefined") {
  module.exports = SelectService;
}
