/**
 * jQuery Geocoding and Places Autocomplete Plugin - V 1.5.0
 *
 * @author Martin Kleppe <kleppe@ubilabs.net>, 2012
 * @author Ubilabs http://ubilabs.net, 2012
 * @license MIT License <http://www.opensource.org/licenses/mit-license.php>
 */

// # $.geocomplete()
// ## jQuery Geocoding and Places Autocomplete Plugin - V 1.5.0
//
// * https://github.com/ubilabs/geocomplete/
// * by Martin Kleppe <kleppe@ubilabs.net>

(function ($, window, document, undefined) {

    // ## Options
    // The default options for this plugin.
    //
    // * `map` - Might be a selector, an jQuery object or a DOM element. Default is `false` which shows no map.
    // * `details` - The container that should be populated with data. Defaults to `false` which ignores the setting.
    // * `location` - Location to initialize the map on. Might be an address `string` or an `array` with [latitude, longitude] or a `google.maps.LatLng`object. Default is `false` which shows a blank map.
    // * `bounds` - Whether to snap geocode search to map bounds. Default: `true` if false search globally. Alternatively pass a custom `LatLngBounds object.
    // * `autoselect` - Automatically selects the highlighted item or the first item from the suggestions list on Enter.
    // * `detailsAttribute` - The attribute's name to use as an indicator. Default: `"name"`
    // * `mapOptions` - Options to pass to the `google.maps.Map` constructor. See the full list [here](http://code.google.com/apis/maps/documentation/javascript/reference.html#MapOptions).
    // * `mapOptions.zoom` - The inital zoom level. Default: `14`
    // * `mapOptions.scrollwheel` - Whether to enable the scrollwheel to zoom the map. Default: `false`
    // * `mapOptions.mapTypeId` - The map type. Default: `"roadmap"`
    // * `markerOptions` - The options to pass to the `google.maps.Marker` constructor. See the full list [here](http://code.google.com/apis/maps/documentation/javascript/reference.html#MarkerOptions).
    // * `markerOptions.draggable` - If the marker is draggable. Default: `false`. Set to true to enable dragging.
    // * `markerOptions.disabled` - Do not show marker. Default: `false`. Set to true to disable marker.
    // * `maxZoom` - The maximum zoom level too zoom in after a geocoding response. Default: `16`
    // * `types` - An array containing one or more of the supported types for the places request. Default: `['geocode']` See the full list [here](http://code.google.com/apis/maps/documentation/javascript/places.html#place_search_requests).

    var defaults = {
        bounds: true,
        country: null,
        map: false,
        details: false,
        detailsAttribute: "name",
        autoselect: true,
        location: false,

        mapOptions: {
            zoom: 14,
            scrollwheel: false,
            mapTypeId: "roadmap"
        },

        markerOptions: {
            draggable: false
        },

        maxZoom: 16,
        types: ['geocode'],
        blur: false
    };

    // See: [Geocoding Types](https://developers.google.com/maps/documentation/geocoding/#Types)
    // on Google Developers.
    var componentTypes = ("street_address route intersection political " +
    "country administrative_area_level_1 administrative_area_level_2 " +
    "administrative_area_level_3 colloquial_area locality sublocality " +
    "neighborhood premise subpremise postal_code natural_feature airport " +
    "park point_of_interest post_box street_number floor room " +
    "lat lng viewport location " +
    "formatted_address location_type bounds").split(" ");

    // See: [Places Details Responses](https://developers.google.com/maps/documentation/javascript/places#place_details_responses)
    // on Google Developers.
    var placesDetails = ("id url website vicinity reference name rating " +
    "international_phone_number icon formatted_phone_number").split(" ");

    // The actual plugin constructor.
    function GeoComplete(input, options) {

        this.options = $.extend(true, {}, defaults, options);

        this.input = input;
        this.$input = $(input);

        this._defaults = defaults;
        this._name = 'geocomplete';

        this.init();
    }

    // Initialize all parts of the plugin.
    $.extend(GeoComplete.prototype, {
        init: function () {
            this.initMap();
            this.initMarker();
            this.initGeocoder();
            this.initDetails();
            this.initLocation();
        },

        // Initialize the map but only if the option `map` was set.
        // This will create a `map` within the given container
        // using the provided `mapOptions` or link to the existing map instance.
        initMap: function () {
            if (!this.options.map) {
                return;
            }

            if (typeof this.options.map.setCenter == "function") {
                this.map = this.options.map;
                return;
            }

            this.map = new google.maps.Map(
                $(this.options.map)[0],
                this.options.mapOptions
            );

            // add click event listener on the map
            google.maps.event.addListener(
                this.map,
                'click',
                $.proxy(this.mapClicked, this)
            );

            google.maps.event.addListener(
                this.map,
                'zoom_changed',
                $.proxy(this.mapZoomed, this)
            );
        },

        // Add a marker with the provided `markerOptions` but only
        // if the option was set. Additionally it listens for the `dragend` event
        // to notify the plugin about changes.
        initMarker: function () {
            if (!this.map) {
                return;
            }
            var options = $.extend(this.options.markerOptions, {map: this.map});

            if (options.disabled) {
                return;
            }

            this.marker = new google.maps.Marker(options);

            google.maps.event.addListener(
                this.marker,
                'dragend',
                $.proxy(this.markerDragged, this)
            );
        },

        // Associate the input with the autocompleter and create a geocoder
        // to fall back when the autocompleter does not return a value.
        initGeocoder: function () {

            var options = {
                types: this.options.types,
                bounds: this.options.bounds === true ? null : this.options.bounds,
                componentRestrictions: this.options.componentRestrictions
            };

            if (this.options.country) {
                options.componentRestrictions = {country: this.options.country};
            }

            this.autocomplete = new google.maps.places.Autocomplete(
                this.input, options
            );

            this.geocoder = new google.maps.Geocoder();

            // Bind autocomplete to map bounds but only if there is a map
            // and `options.bindToMap` is set to true.
            if (this.map && this.options.bounds === true) {
                this.autocomplete.bindTo('bounds', this.map);
            }

            // Watch `place_changed` events on the autocomplete input field.
            google.maps.event.addListener(
                this.autocomplete,
                'place_changed',
                $.proxy(this.placeChanged, this)
            );

            // Prevent parent form from being submitted if user hit enter.
            this.$input.keypress(function (event) {
                if (event.keyCode === 13) {
                    return false;
                }
            });

            // Listen for "geocode" events and trigger find action.
            this.$input.bind("geocode", $.proxy(function () {
                this.find();
            }, this));

            // Trigger find action when input element is blured out.
            // (Usefull for typing partial location and tabing to the next field
            // or clicking somewhere else.)
            if (this.options.blur === true) {
                this.$input.blur($.proxy(function () {
                    this.find();
                }, this));
            }
        },

        // Prepare a given DOM structure to be populated when we got some data.
        // This will cycle through the list of component types and map the
        // corresponding elements.
        initDetails: function () {
            if (!this.options.details) {
                return;
            }

            var $details = $(this.options.details),
                attribute = this.options.detailsAttribute,
                details = {};

            function setDetail(value) {
                details[value] = $details.find("[" + attribute + "=" + value + "]");
            }

            $.each(componentTypes, function (index, key) {
                setDetail(key);
                setDetail(key + "_short");
            });

            $.each(placesDetails, function (index, key) {
                setDetail(key);
            });

            this.$details = $details;
            this.details = details;
        },

        // Set the initial location of the plugin if the `location` options was set.
        // This method will care about converting the value into the right format.
        initLocation: function () {

            var location = this.options.location, latLng;

            if (!location) {
                return;
            }

            if (typeof location == 'string') {
                this.find(location);
                return;
            }

            if (location instanceof Array) {
                latLng = new google.maps.LatLng(location[0], location[1]);
            }

            if (location instanceof google.maps.LatLng) {
                latLng = location;
            }

            if (latLng) {
                if (this.map) {
                    this.map.setCenter(latLng);
                }
                if (this.marker) {
                    this.marker.setPosition(latLng);
                }
            }
        },

        // Look up a given address. If no `address` was specified it uses
        // the current value of the input.
        find: function (address) {
            this.geocode({
                address: address || this.$input.val()
            });
        },

        // Requests details about a given location.
        // Additionally it will bias the requests to the provided bounds.
        geocode: function (request) {
            if (this.options.bounds && !request.bounds) {
                if (this.options.bounds === true) {
                    request.bounds = this.map && this.map.getBounds();
                } else {
                    request.bounds = this.options.bounds;
                }
            }

            if (this.options.country) {
                request.region = this.options.country;
            }

            this.geocoder.geocode(request, $.proxy(this.handleGeocode, this));
        },

        // Get the selected result. If no result is selected on the list, then get
        // the first result from the list.
        selectFirstResult: function () {
            //$(".pac-container").hide();

            var selected = '';
            // Check if any result is selected.
            if ($(".pac-item-selected")['0']) {
                selected = '-selected';
            }

            // Get the first suggestion's text.
            var $span1 = $(".pac-container .pac-item" + selected + ":first span:nth-child(2)").text();
            var $span2 = $(".pac-container .pac-item" + selected + ":first span:nth-child(3)").text();

            // Adds the additional information, if available.
            var firstResult = $span1;
            if ($span2) {
                firstResult += " - " + $span2;
            }

            this.$input.val(firstResult);

            return firstResult;
        },

        // Handles the geocode response. If more than one results was found
        // it triggers the "geocode:multiple" events. If there was an error
        // the "geocode:error" event is fired.
        handleGeocode: function (results, status) {
            if (status === google.maps.GeocoderStatus.OK) {
                var result = results[0];
                this.$input.val(result.formatted_address);
                this.update(result);

                if (results.length > 1) {
                    this.trigger("geocode:multiple", results);
                }

            } else {
                this.trigger("geocode:error", status);
            }
        },

        // Triggers a given `event` with optional `arguments` on the input.
        trigger: function (event, argument) {
            this.$input.trigger(event, [argument]);
        },

        // Set the map to a new center by passing a `geometry`.
        // If the geometry has a viewport, the map zooms out to fit the bounds.
        // Additionally it updates the marker position.
        center: function (geometry) {

            if (geometry.viewport) {
                this.map.fitBounds(geometry.viewport);
                if (this.map.getZoom() > this.options.maxZoom) {
                    this.map.setZoom(this.options.maxZoom);
                }
            } else {
                this.map.setZoom(this.options.maxZoom);
                this.map.setCenter(geometry.location);
            }

            if (this.marker) {
                this.marker.setPosition(geometry.location);
                this.marker.setAnimation(this.options.markerOptions.animation);
            }
        },

        // Update the elements based on a single places or geoocoding response
        // and trigger the "geocode:result" event on the input.
        update: function (result) {

            if (this.map) {
                this.center(result.geometry);
            }

            if (this.$details) {
                this.fillDetails(result);
            }

            this.trigger("geocode:result", result);
        },

        // Populate the provided elements with new `result` data.
        // This will lookup all elements that has an attribute with the given
        // component type.
        fillDetails: function (result) {

            var data = {},
                geometry = result.geometry,
                viewport = geometry.viewport,
                bounds = geometry.bounds;

            // Create a simplified version of the address components.
            $.each(result.address_components, function (index, object) {
                var name = object.types[0];
                data[name] = object.long_name;
                data[name + "_short"] = object.short_name;
            });

            // Add properties of the places details.
            $.each(placesDetails, function (index, key) {
                data[key] = result[key];
            });

            // Add infos about the address and geometry.
            $.extend(data, {
                formatted_address: result.formatted_address,
                location_type: geometry.location_type || "PLACES",
                viewport: viewport,
                bounds: bounds,
                location: geometry.location,
                lat: geometry.location.lat(),
                lng: geometry.location.lng()
            });

            // Set the values for all details.
            $.each(this.details, $.proxy(function (key, $detail) {
                var value = data[key];
                this.setDetail($detail, value);
            }, this));

            this.data = data;
        },

        // Assign a given `value` to a single `$element`.
        // If the element is an input, the value is set, otherwise it updates
        // the text content.
        setDetail: function ($element, value) {

            if (value === undefined) {
                value = "";
            } else if (typeof value.toUrlValue == "function") {
                value = value.toUrlValue();
            }

            if ($element.is(":input")) {
                $element.val(value);
            } else {
                $element.text(value);
            }
        },

        // Fire the "geocode:dragged" event and pass the new position.
        markerDragged: function (event) {
            this.trigger("geocode:dragged", event.latLng);
        },

        mapClicked: function (event) {
            this.trigger("geocode:click", event.latLng);
        },

        mapZoomed: function (event) {
            this.trigger("geocode:zoom", this.map.getZoom());
        },

        // Restore the old position of the marker to the last now location.
        resetMarker: function () {
            this.marker.setPosition(this.data.location);
            this.setDetail(this.details.lat, this.data.location.lat());
            this.setDetail(this.details.lng, this.data.location.lng());
        },

        // Update the plugin after the user has selected an autocomplete entry.
        // If the place has no geometry it passes it to the geocoder.
        placeChanged: function () {
            var place = this.autocomplete.getPlace();

            if (!place || !place.geometry) {
                if (this.options.autoselect) {
                    // Automatically selects the highlighted item or the first item from the
                    // suggestions list.
                    var autoSelection = this.selectFirstResult();
                    this.find(autoSelection);
                }
            } else {
                // Use the input text if it already gives geometry.
                this.update(place);
            }
        }
    });

    // A plugin wrapper around the constructor.
    // Pass `options` with all settings that are different from the default.
    // The attribute is used to prevent multiple instantiations of the plugin.
    $.fn.geocomplete = function (options) {

        var attribute = 'plugin_geocomplete';

        // If you call `.geocomplete()` with a string as the first parameter
        // it returns the corresponding property or calls the method with the
        // following arguments.
        if (typeof options == "string") {

            var instance = $(this).data(attribute) || $(this).geocomplete().data(attribute),
                prop = instance[options];

            if (typeof prop == "function") {
                prop.apply(instance, Array.prototype.slice.call(arguments, 1));
                return $(this);
            } else {
                if (arguments.length == 2) {
                    prop = arguments[1];
                }
                return prop;
            }
        } else {
            return this.each(function () {
                // Prevent against multiple instantiations.
                var instance = $.data(this, attribute);
                if (!instance) {
                    instance = new GeoComplete(this, options);
                    $.data(this, attribute, instance);
                }
            });
        }
    };

})(jQuery, window, document);