/* ------------------------------------------------------------------------ */
/* Lawang.ORG	                                                              */
/* (C) 2011 COMBINE Resource Institution, Isnu Suntoro                      */
/* ------------------------------------------------------------------------ */

var map;
var geocoder;
var infoWindow;
var urlhash = document.location.hash.substring(1);

// BC AB SK MB ON QC NL NB NS PEI Territories (YT NU NT)
var BLMapData = {};
var BLMarkers = [];
var BLMinZoom = 4;
var BLBounds;
var BLDebugAlert = 0;

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

function BLMapInitialize() {
	var browserGeoSupport = new Boolean();
	var mapOptions = {
		mapTypeId: google.maps.MapTypeId.ROADMAP,
		navigationControl: true,
		navigationControlOptions: { style: google.maps.NavigationControlStyle.SMALL },
		mapTypeControl: true,
		mapTypeControlOptions: { 
			style: google.maps.MapTypeControlStyle.DROPDOWN_MENU,
			position: google.maps.ControlPosition.TOP_RIGHT
		},
		scaleControl: true,
	};
	
	BLBounds = new google.maps.LatLngBounds(
		//        new google.maps.LatLng(42.0, -140.0),     // SW
		//        new google.maps.LatLng(70.0, -52.0)       // NE
		//Indonesia
		new google.maps.LatLng(-11.0, 96.0),     // SW
		new google.maps.LatLng(7.0, 130.0)       // NE
	);
	
	// BestLeaf Init
	BLMapData = BLGmapRegion();
    
	// Google Maps Init
    geocoder = new google.maps.Geocoder();
		map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
	
    //iconGreen   = 'http://labs.google.com/ridefinder/images/mm_20_green.png';
    //iconBlue    = 'http://labs.google.com/ridefinder/images/mm_20_blue.png';
    //iconRed     = 'http://labs.google.com/ridefinder/images/mm_20_red.png';
    var customIcons = [];
    customIcons["1"] = '/images/gmap2/icons/agriculture4.png';
    customIcons["4"] = '/images/gmap2/icons/agriculture4.png';
    customIcons["8"] = '/images/gmap2/icons/agriculture4.png';
    customIcons["256"] = '/images/gmap2/icons/friends.png';

    infoWindow = new google.maps.InfoWindow({content: ""});


    var markerArray = [];
    downloadUrl("/xml/all.php", function(data) {
        // Build infoWindow HTML
        var markers = data.documentElement.getElementsByTagName("marker");
        for (var i = 0; i < markers.length; i++) {
            var latlng = new google.maps.LatLng(
                    parseFloat(markers[i].getAttribute("lat")),
                    parseFloat(markers[i].getAttribute("lng"))
            );
            var marker = new google.maps.Marker({
                    position: latlng, 
                    map: map,
                    title: markers[i].getAttribute("name"),
                    icon: customIcons[markers[i].getAttribute("type")],
                    zIndex: parseInt(markers[i].getAttribute("priority"), 10)
            });
            marker.idnum = markers[i].getAttribute("idnum");
            marker.region = markers[i].getAttribute("region");
            //marker.html = BLGenMarkerHTML(markers[i]);
            google.maps.event.addListener(marker, 'click', function () {
                    infoWindow.setContent(BLGenMarkerHTML(this.idnum));
                    infoWindow.open(map, this);
            });
            BLMarkers.push(marker);
        }
        // Overlay is now loaded.  INITIALIZE *********************
        BLNavShowCity();
        BLMapGoto(BLValidDest(urlhash) ? urlhash : false, true);
    });

    google.maps.event.addListener(map, 'center_changed', function() { BLGmapBoundsChanged(); });
    google.maps.event.addListener(map, 'zoom_changed', function() { BLGmapZoomChanged(); });
}

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

function BLGmapZoomChanged()
{
    //if (BLDebugAlert) alert("BLGmapZoomChanged now " + map.getZoom() + " min " + BLMinZoom);
    if (map.getZoom() < BLMinZoom) {
        map.setZoom(BLMinZoom);
        return;
    }
    getCurrentLatLngZoom();
}

function BLGmapBoundsChanged()
{
    //getCurrentLatLngZoom(); return;
    if (!BLBounds.contains(map.getCenter())) {
        // We're out of bounds - Move the map back within the bounds
        var c = map.getCenter(),
            x = c.lng(),
            y = c.lat(),
            maxX = BLBounds.getNorthEast().lng(),
            maxY = BLBounds.getNorthEast().lat(),
            minX = BLBounds.getSouthWest().lng(),
            minY = BLBounds.getSouthWest().lat();
        if (x < minX) x = minX;
        if (x > maxX) x = maxX;
        if (y < minY) y = minY;
        if (y > maxY) y = maxY;
        map.setCenter(new google.maps.LatLng(y, x));
        return;
    }
    getCurrentLatLngZoom();
}

function getCurrentLatLngZoom() 
{
    // debug use
	var latlngElem = document.getElementById("latlng");
	if (!latlngElem)
	    return;
	var latElem = document.getElementById("lat");
	var lngElem = document.getElementById("lng");
	var zoomElem = document.getElementById("zoom");
	var latlng = map.getCenter();
	latElem.value = roundNumber(latlng.lat(), 6);
	lngElem.value = roundNumber(latlng.lng(), 6);
	zoomElem.value = map.getZoom();
	latlngElem.value = latElem.value + "," + lngElem.value + "," + zoomElem.value;
}

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

function BLGenMarkerHTML(idnum)
{
    // BLOCKING
    return getFile('/ajax/infowindow.php?id=' + idnum);
    
    // OLD
    var listingAnchor = "<a href='/listing/" + data.getAttribute("idnum") + "'>";
    var phone = "";
    if (data.getAttribute("phone"))
        phone = "<div class='phone'>" + data.getAttribute("phone") + "</div>";
    var html = "<div class='gmap-infopopup'>" +
        "<div class='name'>" + listingAnchor + data.getAttribute("name") + "</a></div>" +
        "<div class='address'>" + data.getAttribute("address") + "<br>" + data.getAttribute("address2") + "</div>" +
        phone +
        "<div class='description'>" + data.getAttribute("description") + "</div>" +
        "<div style='float: right;'>" + listingAnchor + "view full listing &raquo;</a></div></div>";
    return html;
}

function BLValidDest(where) {
    //if (BLDebugAlert) alert("BLValidDest BLMapData = \n" + BLMapData[where]);
    if (!where || where == '')
        return false;
    if (0 == where.indexOf("listing-"))
        return true;
    if (BLMapData[where] == undefined)
        return false;
    return true;
}

function BLMapGoto(where, force) {
    var latlng;
    var zoom;
    var marker;
    var region;
    var city = false;
    
    if (!where) where = BL_DEFAULT_LOCATION;
    where = where.toLowerCase();
    var arr = where.split("-");
    if (arr.length == 2) {
        region = arr[0];
        city = arr[1];
    } else {
        region = where;
    }
    if (region == 'listing') {
        // Handle listing-id
        if (BLDebugAlert) alert("BLValidDest listing id " + city + "\nChecking markers " + BLMarkers.length);
        for (var i = 0; !marker && i < BLMarkers.length; i++) {
            if (BLMarkers[i].idnum == city)
                marker = BLMarkers[i];
        }
        if (marker) {
            BLUpdateRegion(marker.region, force);
            latlng = marker.position;
            zoom = 15;
        } else {
            return BLMapGoto(false); // not found
        }
    } else {
        // Handle region & region-city
        BLUpdateRegion(region, force);
        BLUpdateCity(city);
        if (BLMapData[where] == undefined)
            where = 'DEFAULT';
        latlng = new google.maps.LatLng(BLMapData[where]['lat'], BLMapData[where]['lng']);
        zoom = BLMapData[where]['zoom'];
    }
    // Update map view
    if (map) {
        //if (BLDebugAlert) alert("BLMapGoto map: " + where);
        infoWindow.close();
        map.setCenter(latlng);
        map.setZoom(zoom);
        if (marker) google.maps.event.trigger(marker, 'click');
    }
}

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

var BLSearchType = 4;

// Called from button onclick
function BLGotoNearestGeoIP(type)
{
    if (type == undefined) type = 1;
    BLSearchType = type;
    var a = $('find-nearest-button');
    if (a) btn.update(a, "Mencari...");
    // DEBUG - assume Quesnel, BC
    //return BLGotoNearest(52.976296, -122.501335, BLSearchType);
    // Try W3C detection first.
    if (navigator.geolocation)
        navigator.geolocation.getCurrentPosition(W3CDetectOK, W3CDetectError);
    else 
        W3CDetectError(false);
}
function W3CDetectOK(position) {
    if (BLDebugAlert) alert('W3CDetectOK ' + position.coords.latitude + "," + position.coords.longitude);
    BLGotoNearest(position.coords.latitude, position.coords.longitude, BLSearchType);
}
function W3CDetectError(error) {
    if (BLDebugAlert) {
        if (error) alert('W3CDetectError ' + error.message);
        alert("MaxMind GeoIP fallback");
    }
    // http://www.maxmind.com/app/javascript_city
    BLGotoNearest(geoip_latitude(), geoip_longitude(), BLSearchType);
}

// Got user's location, find the nearest listing
function BLGotoNearest(lat, lng, type)
{
    new Ajax.Request('/ajax/findnearest.php', {
        parameters: { 'lat': lat, 'lng': lng, 'type': BLSearchType },
        method: 'get',
        onSuccess: function(transport) {
            var data = transport.responseJSON;
            if (!data || !data.length) {
                var a = $('find-nearest-button');
                if (!a) return;
                if (type == 4) {
                    btn.update(a, "Belum ada data pasar! ...");
                    new Effect.Shake(a);
                    new PeriodicalExecuter(function(pe) {
                        pe.stop();
                        BLGotoNearestGeoIP(4);
                    }, 3.5);
                } else {
                    btn.update(a, "Belum ada data pasar disekitar anda!");
                    new Effect.Shake(a);
                }
                return;
            }
            BLMapGoto("listing-" + data[0]);
        },
    });
}

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

function codeAddress() {
	var address = document.getElementById("address").value;
	geocoder.geocode({'address': address}, codeAddressCallback);
}

function codeAddressCallback(results, status) {
	if (status == google.maps.GeocoderStatus.OK) {
		map.setCenter(results[0].geometry.location);
		var marker = new google.maps.Marker({map: map, position: results[0].geometry.location});
	} else {
		alert("Geocode failed: " + status);
	}
}