/*
*  How to build a Google Map and bind a SearchControl to it and put markers
*  on the map for each result we receive.
*/

// First, we have to load the APIs.
google.load('maps', '2');
google.load('search', '1');

// Global variables we will set in OnLoad
var map;
var searcher;

// Second, we set up our function, OnLoad
function OnLoad() {
    // Get the content div and clear it's current contents.
    var contentDiv = document.getElementById('content');
    contentDiv.innerHTML = ''; // Clear any content currently in the Div

    // Next thing we have to do is build two divs to hold our stuff
    var mapContainer = document.createElement('div'); // build the map div
    mapContainer.style.height = '650px'; // set the map height
    mapContainer.style.width = '600px'; // set the map width

    var controlContainer = document.createElement('div'); // build the control div
    controlContainer.style.width = '600px'; // set the control width


    // Now we have to add these divs to the content div in the document body
    contentDiv.appendChild(mapContainer);
    contentDiv.appendChild(controlContainer);

    // We're ready to build our map...
    map = new google.maps.Map2(mapContainer);

    // ...and add a couple of controls.
    map.addControl(new google.maps.SmallMapControl()); // Add a small map control
    map.addControl(new google.maps.MapTypeControl()); // Add the map type control

    // We'll wait to the end to actually initialize the map
    // So let's build the search control
    var searchControl = new google.search.SearchControl();

    // Initialize a LocalSearch instance
    searcher = new google.search.LocalSearch(); // create the object
    searcher.setCenterPoint(map); // bind the searcher to the map

    // Create a SearcherOptions object to ensure we can see all results
    var options = new google.search.SearcherOptions(); // create the object
    options.setExpandMode(google.search.SearchControl.EXPAND_MODE_OPEN);

    // Add the searcher to the SearchControl
    searchControl.addSearcher(searcher, options);

    // And second, we need is a search complete callback!
    searchControl.setSearchCompleteCallback(searcher, function() {
        map.clearOverlays();
        var results = searcher.results; // Grab the results array
        // We loop through to get the points
        for (var i = 0; i < results.length; i++) {
            var result = results[i]; // Get the specific result
            var markerLatLng = new google.maps.LatLng(parseFloat(result.lat),
                                                    parseFloat(result.lng));
            var marker = new google.maps.Marker(markerLatLng); // Create the marker

            // Bind information for the infoWindow aka the map marker popup
            marker.bindInfoWindow(result.html.cloneNode(true));
            result.marker = marker; // bind the marker to the result
            map.addOverlay(marker); // add the marker to the map
        }

        // Store where the map should be centered
        var center = searcher.resultViewport.center;

        // Calculate what the zoom level should be
        var ne = new google.maps.LatLng(searcher.resultViewport.ne.lat,
                                        searcher.resultViewport.ne.lng);
        var sw = new google.maps.LatLng(searcher.resultViewport.sw.lat,
                                        searcher.resultViewport.sw.lng);
        var bounds = new google.maps.LatLngBounds(sw, ne);
        var zoom = map.getBoundsZoomLevel(bounds, new google.maps.Size(600, 600));

        // Set the new center of the map
        // parseFloat converts the lat/lng from a string to a float, which is what
        // the LatLng constructor takes.
        map.setCenter(new google.maps.LatLng(parseFloat(center.lat),
                                             parseFloat(center.lng)),
                                             zoom);
    });

    // Draw the control
    searchControl.draw(controlContainer);

    // Set the map's center point and finish!
    map.setCenter(new google.maps.LatLng(50.43, 30.52), 11);

    // Execute an initial search
    searchControl.execute('');
}

google.setOnLoadCallback(OnLoad);