/**
* 
*  Live Location
*/
    
var liveLocation = L.map('live-location').fitWorld();

var tiles = L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=[MapBox_Access_Token]', {
    maxZoom: 18,
    attribution: 'Map data © <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, ' +
        'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
    id: 'mapbox/streets-v11',
    tileSize: 512,
    zoomOffset: -1
}).addTo(liveLocation);

function onLocationFound(e) {
    var radius = e.accuracy / 2;

    var locationMarker = L.marker(e.latlng).addTo(liveLocation)
        .bindPopup('You are within ' + radius + ' meters from this point').openPopup();

    var locationCircle = L.circle(e.latlng, radius).addTo(liveLocation);
}

function onLocationError(e) {
    alert(e.message);
}

liveLocation.on('locationfound', onLocationFound);
liveLocation.on('locationerror', onLocationError);

liveLocation.locate({setView: true, maxZoom: 16});

/**
* 
*  Interactive Choropleth Map
*/
    
var interactiveMap = L.map('interactive-map').setView([37.8, -96], 4);

var tiles = L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=[MapBox_Access_Token]', {
    maxZoom: 18,
    attribution: 'Map data © <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, ' +
        'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
    id: 'mapbox/light-v9',
    tileSize: 512,
    zoomOffset: -1
}).addTo(interactiveMap);


// control that shows state info on hover
var info = L.control();

info.onAdd = function (interactiveMap) {
    this._div = L.DomUtil.create('div', 'info');
    this.update();
    return this._div;
};

info.update = function (props) {
    this._div.innerHTML = '<h4>US Population Density</h4>' +  (props ?
        '<b>' + props.name + '</b><br />' + props.density + ' people / mi<sup>2</sup>' : 'Hover over a state');
};

info.addTo(interactiveMap);


// get color depending on population density value
function getColor(d) {
    return d > 1000 ? '#800026' :
        d > 500  ? '#BD0026' :
        d > 200  ? '#E31A1C' :
        d > 100  ? '#FC4E2A' :
        d > 50   ? '#FD8D3C' :
        d > 20   ? '#FEB24C' :
        d > 10   ? '#FED976' : '#FFEDA0';
}

function style(feature) {
    return {
        weight: 2,
        opacity: 1,
        color: 'white',
        dashArray: '3',
        fillOpacity: 0.7,
        fillColor: getColor(feature.properties.density)
    };
}

function highlightFeature(e) {
    var layer = e.target;

    layer.setStyle({
        weight: 5,
        color: '#666',
        dashArray: '',
        fillOpacity: 0.7
    });

    if (!L.Browser.ie && !L.Browser.opera && !L.Browser.edge) {
        layer.bringToFront();
    }

    info.update(layer.feature.properties);
}

var geojson;

function resetHighlight(e) {
    geojson.resetStyle(e.target);
    info.update();
}

function zoomToFeature(e) {
    interactiveMap.fitBounds(e.target.getBounds());
}

function onEachFeature(feature, layer) {
    layer.on({
        mouseover: highlightFeature,
        mouseout: resetHighlight,
        click: zoomToFeature
    });
}

/* global statesData */
geojson = L.geoJson(statesData, {
    style: style,
    onEachFeature: onEachFeature
}).addTo(interactiveMap);

interactiveMap.attributionControl.addAttribution('Population data © <a href="http://census.gov/">US Census Bureau</a>');


var legend = L.control({position: 'bottomright'});

legend.onAdd = function (interactiveMap) {

    var div = L.DomUtil.create('div', 'info legend');
    var grades = [0, 10, 20, 50, 100, 200, 500, 1000];
    var labels = [];
    var from, to;

    for (var i = 0; i < grades.length; i++) {
        from = grades[i];
        to = grades[i + 1];

        labels.push(
            '<i style="background:' + getColor(from + 1) + '"></i> ' +
            from + (to ? '–' + to : '+'));
    }

    div.innerHTML = labels.join('<br>');
    return div;
};

legend.addTo(interactiveMap);