/*

    File: maps.js

Abstract: The View Controller subclass that implements the map.

 Version: 1.3

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*/

iAd.Class({

  name: 'MapsController',

  superclass: iAd.ViewController

});

MapsController.prototype.init = function (configuration) {

  this.callSuper(configuration);

  // We want to zoom the map to the annotations, but only the

  // first time they are added.

  this.mapHasZoomed = false;

};

/* ---------------------------------- */

/* Methods overridden from superclass */

/* ---------------------------------- */

MapsController.prototype.viewDidLoad = function () {

  this.callSuper();

  // Since maps are only available in the iAd system, we can not

  // execute this code unless we are there.

  if (runningInAdContext) {

    // Create a set of annotations but don't add them to the map yet.

    var pinURL = window.location.toString().replace(/\/[^\/]*$/, "/") + "assets/map/pin.png";

    this.annotations = new Array();

    this.annotationBounds = { minx : Number.MAX_VALUE, miny : Number.MAX_VALUE, maxx : -Number.MAX_VALUE, maxy : -Number.MAX_VALUE};

    for (var i=0; i < MapLocations.length; i++) {

      var info = MapLocations[i];

      var specialPinType = info[5];

      var annotation = {

        identifier : "id" + info[0],

        title : info[1],

        subtitle : info[2],

        latitude : info[3],

        longitude : info[4],

        imageURL : pinURL,

        // The image for the pin has the location point (where the 'pin' looks

        // like it is hitting the ground) offset from the center point of the

        // image. Tell the map how it should position the image to make things

        // look correct, otherwise zooming will make the pin appear to move.

        xOffset : 0,

        yOffset : -18

      };

      // Keep track of the annotation boundaries, so we can zoom to this location.

      this.annotationBounds.minx = Math.min(this.annotationBounds.minx, info[3]);

      this.annotationBounds.miny = Math.min(this.annotationBounds.miny, info[4]);

      this.annotationBounds.maxx = Math.max(this.annotationBounds.maxx, info[3]);

      this.annotationBounds.maxy = Math.max(this.annotationBounds.maxy, info[4]);

      // Add the pin to a local array.

      this.annotations.push(annotation);

    }

  }

};

// Create the maps plugin and add it to the document.

MapsController.prototype.viewDidAppear = function() {

  this.callSuper();

  if (runningInAdContext) {

    // Create the map plugin

    var map = document.createElement('object');

    map.setAttribute("type", "application/x-geomap");

    this.outlets.mapcontainer.appendChild(map);

    this.map = map;

    // The plugin API is not ready to be used until the next execution

    // cycle. Call an initialize method to set the map up as soon

    // as possible.

    this.callMethodNameAfterDelay('initializeMap', 0);

  }

};

MapsController.prototype.initializeMap = function() {

  // Make sure we are the listener object, so we're told about map updates.

  this.map.listener = this;

  // Show current user location

  this.map.showsUserLocation = true;

  // Add the annotations. Do it with a slight delay so that

  // the user can see the pins drop.

  var annotations = this.annotations;

  var _this = this;

  window.setTimeout(function() {

    _this.map.addAnnotations(annotations);

  }, 500);

  // If the user set a region (by panning or zooming themselves)

  // then restore it.

  if (this.lastRegion) {

    var region = {

      latitude : this.lastRegion.latitude,

      longitude : this.lastRegion.longitude,

      latitudeDelta : this.lastRegion.latitudeDelta,

      longitudeDelta : this.lastRegion.longitudeDelta

    };

    this.map.setRegion(region, false);

  }

};

// Remove and delete the map object when it is no longer needed.

MapsController.prototype.viewWillDisappear = function() {

  if (runningInAdContext) {

    this.outlets.mapcontainer.removeChild(this.map);

    this.map = null;

  }

};

/* -------------------------- */

/* MapListener implementation */

/* -------------------------- */

// Keep track of the current region so that if the user navigates away from

// this view, we can set the region correctly upon return.

MapsController.prototype.mapRegionDidChange = function (region) {

  this.lastRegion = region;

};

// When we get told the user location is available, zoom to all the

// annotations so the user knows where they are in relation. Only do this

// the first time the location becomes available.

MapsController.prototype.mapDidUpdateUserLocation = function (location) {

  if (!this.mapHasZoomed) {

    this.mapHasZoomed = true;

    // Get the annotation bounds we recorded earlier, and set this as the current map region.

    var latitudeDelta = this.annotationBounds.maxx - this.annotationBounds.minx;

    var longitudeDelta = this.annotationBounds.maxy - this.annotationBounds.miny;

    // We don't want to zoom completely in on the annotations. We should add

    // a little extra to the region, in this case 25%.

    var region = {

      latitude : this.annotationBounds.minx + (0.5 * latitudeDelta),

      longitude : this.annotationBounds.miny + (0.5 * longitudeDelta),

      latitudeDelta : latitudeDelta * 1.25,

      longitudeDelta : longitudeDelta * 1.25

    };

    this.map.setRegion(region, true);

  }

};